:root{
  color-scheme:dark;
  --bg:#071019;
  --panel:rgba(9,20,30,.72);
  --panel-strong:rgba(7,16,25,.96);
  --panel-soft:rgba(255,255,255,.045);
  --line:rgba(255,255,255,.13);
  --line-strong:rgba(255,255,255,.22);
  --text:#f5f7f9;
  --muted:rgba(245,247,249,.63);
  --faint:rgba(245,247,249,.38);
  --accent:#ff9950;
  --accent-soft:rgba(255,153,80,.17);
  --accent-2:#f5c58c;
  --good:#83d9a0;
  --warn:#ffd27c;
  --danger:#ff9188;
  --shadow:0 30px 90px rgba(0,0,0,.42);
  --radius:22px;
  --rail:88px;
  --subnav:230px;
}
*{box-sizing:border-box}
html{background:var(--bg);scroll-behavior:smooth}
body{margin:0;min-width:320px;min-height:100vh;background:var(--bg);color:var(--text);font-family:"Microsoft YaHei","微软雅黑","PingFang SC","Noto Sans SC",Arial,sans-serif;overflow-x:hidden}
#app{position:relative;min-height:100vh;isolation:isolate}
button,input,select,textarea{font:inherit}
button{color:inherit}
a{color:inherit}
::selection{background:rgba(255,153,80,.36);color:#fff}
.hidden{display:none!important}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}

/* cinematic dynamic scenery */
.scene-world{
  --scene-x:72%;
  --scene-y:34%;
  --scene-shift-x:0px;
  --scene-shift-y:0px;
  position:fixed;
  inset:0;
  z-index:0;
  overflow:hidden;
  background:#071019;
  pointer-events:none;
}
.app-bg{
  position:absolute;
  inset:-5%;
  opacity:0;
  background:#071019 center/cover no-repeat;
  filter:saturate(.9) brightness(.78) contrast(1.04);
  transform:translate3d(var(--scene-shift-x),var(--scene-shift-y),0) scale(1.075);
  transition:opacity 1.25s ease,filter .7s ease;
  will-change:transform,opacity;
  animation:sceneDrift 24s ease-in-out infinite alternate;
}
.app-bg-b{animation-direction:alternate-reverse;animation-duration:29s}
.app-bg.active{opacity:1}
@keyframes sceneDrift{
  0%{transform:translate3d(calc(var(--scene-shift-x) - 1.1%),calc(var(--scene-shift-y) - .5%),0) scale(1.09)}
  50%{transform:translate3d(var(--scene-shift-x),var(--scene-shift-y),0) scale(1.055)}
  100%{transform:translate3d(calc(var(--scene-shift-x) + 1%),calc(var(--scene-shift-y) + .45%),0) scale(1.08)}
}
.app-bg-reveal{
  position:absolute;
  inset:-3%;
  opacity:0;
  background:center/cover no-repeat;
  filter:saturate(1.05) brightness(1.08) contrast(1.03);
  transform:translate3d(var(--scene-shift-x),var(--scene-shift-y),0) scale(1.045);
  -webkit-mask-image:radial-gradient(circle 250px at var(--scene-x) var(--scene-y),#000 0 42%,rgba(0,0,0,.82) 58%,transparent 100%);
  mask-image:radial-gradient(circle 250px at var(--scene-x) var(--scene-y),#000 0 42%,rgba(0,0,0,.82) 58%,transparent 100%);
  transition:opacity .8s ease;
  will-change:transform,mask-image;
}
.app-bg-reveal.active{opacity:.92}
.scene-world::before{
  content:"";
  position:absolute;
  z-index:4;
  inset:0;
  background:linear-gradient(90deg,rgba(3,9,14,.93) 0%,rgba(3,9,14,.66) 34%,rgba(3,9,14,.43) 66%,rgba(3,9,14,.7) 100%),linear-gradient(180deg,rgba(2,8,13,.18),rgba(2,8,13,.76));
}
.scene-world::after{
  content:"";
  position:absolute;
  z-index:5;
  inset:0;
  background:radial-gradient(circle at var(--scene-x) var(--scene-y),rgba(255,205,155,.12),transparent 25%),radial-gradient(circle at 24% 82%,rgba(112,170,194,.12),transparent 38%);
  mix-blend-mode:screen;
  transition:background .2s linear;
}
.scene-aurora{
  position:absolute;
  z-index:2;
  inset:-35%;
  background:conic-gradient(from 140deg at 65% 42%,transparent 0 25%,rgba(97,166,180,.08) 33%,transparent 45% 68%,rgba(255,177,105,.08) 76%,transparent 86%);
  filter:blur(80px);
  opacity:.65;
  animation:auroraTurn 38s linear infinite;
}
@keyframes auroraTurn{to{transform:rotate(360deg) scale(1.06)}}
.scene-mist{
  position:absolute;
  z-index:3;
  width:70vw;
  height:30vh;
  border-radius:50%;
  background:rgba(215,235,235,.055);
  filter:blur(70px);
  opacity:.5;
}
.scene-mist-a{left:-25vw;top:14vh;animation:mistA 22s ease-in-out infinite alternate}
.scene-mist-b{right:-30vw;bottom:4vh;animation:mistB 27s ease-in-out infinite alternate-reverse}
@keyframes mistA{to{transform:translate3d(42vw,10vh,0) scale(1.16);opacity:.28}}
@keyframes mistB{to{transform:translate3d(-38vw,-12vh,0) scale(.88);opacity:.62}}
.scene-particles{position:absolute;z-index:3;inset:0;overflow:hidden;opacity:.45}
.scene-particles i{position:absolute;bottom:-8vh;width:2px;height:2px;border-radius:50%;background:rgba(255,226,193,.85);box-shadow:0 0 14px rgba(255,194,132,.72);animation:particleRise 12s linear infinite}
.scene-particles i:nth-child(1){left:14%;animation-delay:-3s}.scene-particles i:nth-child(2){left:31%;animation-delay:-8s;animation-duration:15s}.scene-particles i:nth-child(3){left:48%;animation-delay:-5s;animation-duration:11s}.scene-particles i:nth-child(4){left:67%;animation-delay:-10s;animation-duration:17s}.scene-particles i:nth-child(5){left:79%;animation-delay:-1s;animation-duration:13s}.scene-particles i:nth-child(6){left:91%;animation-delay:-7s;animation-duration:16s}
@keyframes particleRise{0%{transform:translate3d(0,0,0);opacity:0}15%{opacity:.7}80%{opacity:.25}100%{transform:translate3d(22px,-112vh,0);opacity:0}}
.app-grain{position:fixed;inset:0;z-index:1;pointer-events:none;opacity:.1;background-image:url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.35'/%3E%3C/svg%3E")}
@media (prefers-reduced-motion:reduce){.app-bg,.scene-aurora,.scene-mist,.scene-particles i{animation:none!important}.app-bg-reveal{display:none}}

/* shell */
.app-shell{position:relative;z-index:2;min-height:100vh;display:grid;grid-template-columns:var(--rail) minmax(0,1fr)}
.site-rail{position:fixed;z-index:120;inset:0 auto 0 0;width:var(--rail);display:flex;flex-direction:column;align-items:center;padding:18px 10px 14px;border-right:1px solid rgba(255,255,255,.09);background:linear-gradient(180deg,rgba(4,12,19,.94),rgba(5,13,21,.82));backdrop-filter:blur(24px);-webkit-backdrop-filter:blur(24px)}
.brand-mark{width:52px;height:52px;display:grid;place-items:center;border:1px solid rgba(255,255,255,.2);border-radius:17px;background:linear-gradient(145deg,rgba(255,255,255,.12),rgba(255,255,255,.025));box-shadow:inset 0 1px rgba(255,255,255,.16),0 12px 28px rgba(0,0,0,.25);cursor:pointer;font-size:18px;font-weight:800;letter-spacing:-.08em}
.site-rail nav{width:100%;display:grid;gap:8px;margin-top:24px}
.rail-button{width:100%;min-height:58px;display:grid;place-items:center;gap:4px;border:1px solid transparent;border-radius:16px;background:transparent;color:var(--muted);cursor:pointer;transition:.2s ease}
.rail-button svg{width:19px;height:19px;stroke:currentColor;fill:none;stroke-width:1.7}
.rail-button span{font-size:10px;letter-spacing:.04em}
.rail-button:hover,.rail-button.active{border-color:rgba(255,153,80,.35);background:var(--accent-soft);color:#fff;transform:translateY(-1px)}
.rail-spacer{flex:1}
.rail-mini{width:46px;height:46px;border:1px solid var(--line);border-radius:14px;background:rgba(255,255,255,.035);cursor:pointer;color:var(--muted)}
.rail-mini:hover{color:#fff;border-color:rgba(255,153,80,.48)}
.main-shell{grid-column:2;min-width:0;padding:0 28px 80px}
.topbar{position:sticky;z-index:110;top:0;min-height:76px;display:flex;align-items:center;gap:18px;padding:12px 0;border-bottom:1px solid rgba(255,255,255,.09);background:linear-gradient(180deg,rgba(5,13,21,.92),rgba(5,13,21,.58));backdrop-filter:blur(22px);-webkit-backdrop-filter:blur(22px)}
.topbar-title{display:grid;gap:3px;min-width:150px}
.topbar-title strong{font-size:16px}
.topbar-title small{color:var(--faint);font-size:10px;letter-spacing:.13em;text-transform:uppercase}
.topbar-actions{margin-left:auto;display:flex;align-items:center;gap:9px}
.pill-button,.icon-button{min-height:42px;border:1px solid var(--line);border-radius:999px;background:rgba(7,16,25,.62);cursor:pointer;transition:.2s ease}
.pill-button{padding:0 15px;font-size:13px}
.icon-button{width:42px;display:grid;place-items:center}
.pill-button:hover,.icon-button:hover{border-color:rgba(255,153,80,.55);background:var(--accent-soft)}
.mobile-menu-button{display:none}
.search-box{position:relative;width:min(360px,30vw)}
.search-box input{width:100%;height:44px;padding:0 42px 0 16px;border:1px solid var(--line);border-radius:999px;background:rgba(7,16,25,.68);color:#fff;outline:none}
.search-box input:focus{border-color:rgba(255,153,80,.62);box-shadow:0 0 0 3px rgba(255,153,80,.12)}
.search-box .search-icon{position:absolute;right:14px;top:50%;transform:translateY(-50%);color:var(--faint);pointer-events:none}
.search-popover{position:absolute;top:calc(100% + 10px);right:0;width:min(560px,88vw);max-height:min(620px,70vh);overflow:auto;display:none;padding:10px;border:1px solid var(--line);border-radius:20px;background:rgba(6,15,24,.98);box-shadow:var(--shadow);backdrop-filter:blur(22px)}
.search-popover.show{display:grid;gap:6px}
.search-section-label{padding:10px 10px 4px;color:var(--accent-2);font-size:11px;letter-spacing:.1em;text-transform:uppercase}
.search-result{width:100%;display:grid;grid-template-columns:36px minmax(0,1fr) auto;gap:12px;align-items:center;padding:12px;border:0;border-radius:14px;background:transparent;text-align:left;cursor:pointer}
.search-result:hover{background:rgba(255,255,255,.07)}
.search-result .badge{width:36px;height:36px;display:grid;place-items:center;border-radius:11px;background:rgba(255,153,80,.13);color:var(--accent)}
.search-result strong{display:block;font-size:14px}
.search-result small{display:block;margin-top:4px;color:var(--muted);line-height:1.45}
.search-result em{color:var(--faint);font-size:11px;font-style:normal}
.page-stage{padding:34px 0 0}

/* shared page */
.page-layout{display:grid;grid-template-columns:var(--subnav) minmax(0,1fr);gap:24px;align-items:start}
.subnav{position:sticky;top:104px;display:grid;gap:8px;padding:16px;border:1px solid var(--line);border-radius:20px;background:rgba(7,16,25,.66);box-shadow:0 18px 50px rgba(0,0,0,.19);backdrop-filter:blur(18px)}
.subnav-head{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:4px 4px 12px;border-bottom:1px solid rgba(255,255,255,.08)}
.subnav-head strong{font-size:15px}
.subnav-head small{color:var(--faint);font-size:10px;letter-spacing:.1em}
.subnav button{width:100%;min-height:45px;padding:10px 12px;border:1px solid transparent;border-radius:12px;background:transparent;color:var(--muted);text-align:left;cursor:pointer}
.subnav button:hover,.subnav button.active{border-color:rgba(255,153,80,.4);background:var(--accent-soft);color:#fff}
.page-content{min-width:0;display:grid;gap:22px}
.page-heading{display:grid;gap:12px;padding:14px 0 4px}
.page-heading .eyebrow{color:var(--accent-2);font-size:11px;letter-spacing:.16em;text-transform:uppercase}
.page-heading h1{margin:0;font-size:clamp(36px,5vw,70px);line-height:1.02;letter-spacing:-.045em}
.page-heading p{max-width:780px;margin:0;color:var(--muted);font-size:15px;line-height:1.8}
.panel{border:1px solid var(--line);border-radius:var(--radius);background:linear-gradient(145deg,rgba(8,18,28,.84),rgba(11,24,35,.64));box-shadow:0 22px 66px rgba(0,0,0,.22);backdrop-filter:blur(18px)}
.panel-pad{padding:clamp(20px,3vw,34px)}
.section-title{display:flex;align-items:flex-end;justify-content:space-between;gap:14px;margin-bottom:18px}
.section-title h2{margin:0;font-size:clamp(22px,2.5vw,32px)}
.section-title p{margin:0;color:var(--muted);font-size:13px}
.notice{padding:13px 15px;border:1px solid rgba(255,153,80,.27);border-radius:13px;background:rgba(255,153,80,.08);color:rgba(255,255,255,.77);font-size:13px;line-height:1.7}
.primary-button,.secondary-button,.danger-button{min-height:44px;padding:9px 16px;border-radius:12px;cursor:pointer;transition:.2s ease}
.primary-button{border:1px solid rgba(255,153,80,.65);background:linear-gradient(135deg,rgba(255,153,80,.25),rgba(255,153,80,.09));color:#fff}
.secondary-button{border:1px solid var(--line);background:rgba(255,255,255,.035);color:#fff}
.danger-button{border:1px solid rgba(255,145,136,.45);background:rgba(255,145,136,.09);color:#ffd0cc}
.primary-button:hover,.secondary-button:hover,.danger-button:hover{transform:translateY(-1px);filter:brightness(1.12)}
.chip-row{display:flex;flex-wrap:wrap;gap:8px}
.chip{display:inline-flex;align-items:center;gap:6px;min-height:32px;padding:5px 10px;border:1px solid var(--line);border-radius:999px;background:rgba(255,255,255,.035);color:var(--muted);font-size:12px}
.chip.accent{border-color:rgba(255,153,80,.42);background:var(--accent-soft);color:#ffd8b9}
.empty-state{display:grid;place-items:center;min-height:230px;padding:30px;text-align:center}
.empty-state strong{font-size:22px}
.empty-state p{max-width:520px;color:var(--muted);line-height:1.75}

/* home */
.home-hero{min-height:calc(100vh - 150px);display:grid;align-content:center;gap:34px;padding:54px 0 68px}
.home-copy{max-width:1120px;display:grid;gap:24px}
.home-copy .eyebrow{color:var(--accent-2);font-size:12px;letter-spacing:.18em;text-transform:uppercase}
.home-copy h1{max-width:1100px;margin:0;display:grid;gap:.14em;font-size:clamp(48px,6.35vw,98px);line-height:1.08;letter-spacing:-.025em;text-wrap:balance;text-shadow:0 18px 50px rgba(0,0,0,.32)}
.home-copy h1 .hero-line{display:block}
.home-copy h1 .hero-line-primary{color:rgba(255,255,255,.98);font-weight:800}
.home-copy h1 .hero-line-secondary{color:rgba(255,255,255,.68);font-weight:500}
.home-copy p{max-width:760px;margin:2px 0 0;color:rgba(255,255,255,.74);font-size:16px;line-height:1.95}
.category-grid{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:14px}
.category-card{position:relative;min-height:270px;overflow:hidden;display:flex;flex-direction:column;align-items:flex-start;gap:12px;padding:24px;border:1px solid var(--line);border-radius:22px;background:linear-gradient(160deg,rgba(255,255,255,.085),rgba(255,255,255,.018));box-shadow:0 20px 58px rgba(0,0,0,.22);cursor:pointer;text-align:left;transition:.28s ease}
.category-card::before{content:"";position:absolute;inset:auto -35% -50% 5%;height:75%;background:radial-gradient(circle,rgba(255,153,80,.2),transparent 66%);opacity:0;transition:.28s ease}
.category-card:hover{transform:translateY(-7px);border-color:rgba(255,153,80,.55);background:linear-gradient(160deg,rgba(255,255,255,.12),rgba(255,153,80,.05))}
.category-card:hover::before{opacity:1}
.category-card .num{color:var(--faint);font:600 12px/1 Arial;letter-spacing:.14em}
.category-card .en{color:var(--accent-2);font-size:10px;letter-spacing:.16em}
.category-card strong{margin-top:12px;font-size:clamp(26px,3vw,42px);letter-spacing:-.04em}
.category-card p{margin:0;color:var(--muted);font-size:13px;line-height:1.7}
.category-card .arrow{margin-top:auto;width:42px;height:42px;display:grid;place-items:center;border:1px solid var(--line);border-radius:50%;transition:.25s ease}
.category-card:hover .arrow{transform:translateX(6px);border-color:rgba(255,153,80,.55);background:var(--accent-soft)}
.home-status{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
.status-card{padding:16px 18px;border-top:1px solid rgba(255,255,255,.16);background:linear-gradient(180deg,rgba(255,255,255,.035),transparent)}
.status-card strong{display:block;font-size:22px}
.status-card small{color:var(--muted)}

/* vocabulary */
.mode-chooser{display:grid;gap:22px;padding:clamp(26px,4vw,46px)}
.mode-chooser h2{margin:0;font-size:clamp(30px,4vw,54px)}
.mode-chooser>p{max-width:750px;margin:0;color:var(--muted);line-height:1.85}
.mode-options{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
.mode-card{min-height:190px;display:flex;flex-direction:column;align-items:flex-start;gap:12px;padding:24px;border:1px solid var(--line);border-radius:18px;background:rgba(255,255,255,.035);cursor:pointer;text-align:left;transition:.25s ease}
.mode-card:hover{transform:translateY(-4px);border-color:rgba(255,153,80,.62);background:var(--accent-soft)}
.mode-card strong{font-size:26px}
.mode-card p{margin:0;color:var(--muted);line-height:1.75}
.mode-card span{margin-top:auto;color:var(--accent-2);font-size:12px}
.toolbar{display:grid;grid-template-columns:minmax(180px,1fr) 160px auto auto;gap:10px;align-items:center;padding:12px;border:1px solid var(--line);border-radius:16px;background:rgba(7,16,25,.66)}
.toolbar input,.toolbar select{height:44px;padding:0 13px;border:1px solid var(--line);border-radius:11px;background:rgba(4,12,19,.72);color:#fff;outline:none}
.toolbar input:focus,.toolbar select:focus{border-color:rgba(255,153,80,.58)}
.word-card{min-height:500px;display:grid;align-content:center;gap:22px;padding:clamp(30px,5vw,68px);background:radial-gradient(circle at 82% 13%,rgba(255,153,80,.17),transparent 34%),linear-gradient(145deg,rgba(5,13,21,.91),rgba(14,29,41,.72))}
.word-card-meta{display:flex;flex-wrap:wrap;gap:8px;color:var(--muted);font-size:12px}
.word-card h2{margin:0;font-size:clamp(58px,8vw,112px);line-height:.95;letter-spacing:-.07em;overflow-wrap:anywhere}
.word-answer{max-width:900px;display:grid;gap:12px}
.word-answer strong{font-size:clamp(20px,2.3vw,30px);line-height:1.55}
.word-answer p{margin:0;color:rgba(255,255,255,.74);font-size:16px;line-height:1.8}
.word-actions{display:flex;flex-wrap:wrap;gap:9px}
.word-actions button{min-height:48px;padding:10px 17px;border-radius:13px}
.word-list-wrap{overflow:auto}
.word-table{width:100%;min-width:820px;border-collapse:collapse}
.word-table th,.word-table td{padding:15px 17px;border-bottom:1px solid rgba(255,255,255,.08);text-align:left;vertical-align:top;line-height:1.55}
.word-table th{position:sticky;top:0;background:rgba(7,16,25,.96);color:var(--muted);font-size:11px;letter-spacing:.08em}
.word-table td:first-child{font-size:18px;font-weight:700;cursor:pointer}
.word-table td:first-child:hover{color:var(--accent-2)}
.pagination{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:14px 0}
.wordbook-grid{display:grid;gap:12px}
.wordbook-row{display:grid;grid-template-columns:minmax(130px,.8fr) minmax(220px,2fr) auto;gap:16px;align-items:center;padding:17px 19px;border:1px solid var(--line);border-radius:15px;background:rgba(255,255,255,.032)}
.wordbook-row strong{font-size:20px}
.wordbook-row p{margin:0;color:var(--muted);line-height:1.6}
.review-list{display:grid;gap:10px}
.review-row{display:grid;grid-template-columns:1fr auto auto;gap:12px;align-items:center;padding:15px;border:1px solid var(--line);border-radius:14px;background:rgba(255,255,255,.03)}
.review-row small{display:block;margin-top:4px;color:var(--muted)}

/* reading */
.reader-layout{display:grid;grid-template-columns:minmax(0,1.6fr) minmax(280px,.7fr);gap:18px}
.article-panel{padding:clamp(24px,4vw,46px)}
.article-panel .source{display:flex;flex-wrap:wrap;gap:8px;color:var(--muted);font-size:12px}
.article-panel h2{margin:18px 0 16px;font-size:clamp(32px,4vw,58px);line-height:1.13;letter-spacing:-.045em}
.article-panel .lead{color:rgba(255,255,255,.82);font-size:18px;line-height:1.8}
.article-body{display:grid;gap:18px;color:rgba(255,255,255,.76);font-family:Georgia,"Times New Roman",serif;font-size:18px;line-height:1.95}
.article-body p{margin:0}
.reader-side{display:grid;gap:14px}
.reader-side .panel{padding:19px}
.reader-side h3{margin:0 0 12px}
.reader-side p{color:var(--muted);font-size:13px;line-height:1.7}
.article-picker{display:grid;gap:8px}
.article-picker button{padding:13px;border:1px solid transparent;border-radius:12px;background:rgba(255,255,255,.03);text-align:left;cursor:pointer}
.article-picker button:hover,.article-picker button.active{border-color:rgba(255,153,80,.4);background:var(--accent-soft)}
.article-picker small{display:block;margin-top:4px;color:var(--muted)}

/* listening */
.listening-grid{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(300px,.75fr);gap:18px}
.audio-stage{min-height:450px;display:grid;align-content:center;gap:22px;padding:clamp(28px,5vw,58px);text-align:center}
.waveform{height:90px;display:flex;align-items:center;justify-content:center;gap:6px}
.waveform i{width:5px;height:20px;border-radius:999px;background:linear-gradient(180deg,var(--accent-2),var(--accent));opacity:.65}
.audio-playing .waveform i{animation:wave 1.05s ease-in-out infinite}
.waveform i:nth-child(2n){animation-delay:.12s}.waveform i:nth-child(3n){animation-delay:.24s}.waveform i:nth-child(5n){animation-delay:.36s}
@keyframes wave{0%,100%{height:18px;opacity:.38}50%{height:74px;opacity:1}}
.audio-stage h2{margin:0;font-size:clamp(30px,4vw,56px)}
.audio-stage p{margin:0;color:var(--muted);line-height:1.8}
.audio-controls{display:flex;justify-content:center;flex-wrap:wrap;gap:10px}
.audio-side{display:grid;gap:14px}
.audio-setting{display:grid;gap:8px;padding:18px}
.audio-setting label{color:var(--muted);font-size:13px}
.audio-setting input,.audio-setting select{width:100%;height:42px;padding:0 10px;border:1px solid var(--line);border-radius:10px;background:rgba(5,13,21,.72);color:#fff}
.audio-history{display:grid;gap:8px}
.audio-history button{padding:12px;border:1px solid var(--line);border-radius:11px;background:rgba(255,255,255,.03);text-align:left;cursor:pointer}

/* tests */
.test-setup{display:grid;gap:22px;padding:clamp(24px,4vw,42px)}
.test-setup-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.setup-block{display:grid;gap:12px;padding:18px;border:1px solid var(--line);border-radius:16px;background:rgba(255,255,255,.03)}
.setup-block h3{margin:0;font-size:18px}
.setup-block p{margin:0;color:var(--muted);font-size:13px;line-height:1.7}
.option-grid{display:flex;flex-wrap:wrap;gap:8px}
.choice-toggle{display:inline-flex;align-items:center;gap:7px;min-height:39px;padding:7px 11px;border:1px solid var(--line);border-radius:11px;background:rgba(255,255,255,.025);cursor:pointer}
.choice-toggle input{accent-color:var(--accent)}
.test-stage{min-height:510px;display:grid;align-content:center;gap:22px;padding:clamp(28px,5vw,58px)}
.test-meta{display:flex;align-items:center;justify-content:space-between;gap:12px;color:var(--muted);font-size:12px}
.progress-line{height:5px;overflow:hidden;border-radius:999px;background:rgba(255,255,255,.08)}
.progress-line i{display:block;height:100%;background:linear-gradient(90deg,var(--accent),var(--accent-2));transition:width .3s ease}
.test-stage h2{margin:0;font-size:clamp(30px,4.6vw,64px);line-height:1.12;letter-spacing:-.04em}
.test-prompt-copy{color:var(--muted);font-size:15px;line-height:1.75}
.answer-options{display:grid;gap:10px}
.answer-option{width:100%;min-height:64px;display:flex;align-items:center;padding:15px 18px;border:1px solid var(--line);border-radius:15px;background:rgba(255,255,255,.035);font-size:17px;text-align:left;cursor:pointer;transition:.18s ease}
.answer-option:hover{border-color:rgba(255,153,80,.48);background:var(--accent-soft)}
.answer-option.correct{border-color:rgba(131,217,160,.65);background:rgba(131,217,160,.13)}
.answer-option.wrong{border-color:rgba(255,145,136,.62);background:rgba(255,145,136,.12)}
.spelling-answer{display:flex;gap:10px}
.spelling-answer input{flex:1;height:56px;padding:0 16px;border:1px solid var(--line);border-radius:14px;background:rgba(4,12,19,.7);color:#fff;font-size:18px;outline:none}
.spelling-answer input:focus{border-color:rgba(255,153,80,.6)}
.feedback-box{padding:14px 16px;border:1px solid var(--line);border-radius:13px;line-height:1.7}
.feedback-box.good{border-color:rgba(131,217,160,.45);background:rgba(131,217,160,.08)}
.feedback-box.bad{border-color:rgba(255,145,136,.45);background:rgba(255,145,136,.08)}
.result-score{font-size:clamp(62px,10vw,130px);font-weight:800;letter-spacing:-.08em}

/* data */
.metric-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}
.metric-card{min-height:140px;display:grid;align-content:space-between;padding:19px;border:1px solid var(--line);border-radius:17px;background:rgba(255,255,255,.035)}
.metric-card small{color:var(--muted)}
.metric-card strong{font-size:36px}
.progress-table{width:100%;border-collapse:collapse}
.progress-table th,.progress-table td{padding:14px;border-bottom:1px solid rgba(255,255,255,.08);text-align:left}
.progress-table th{color:var(--muted);font-size:12px}
.settings-grid{display:grid;gap:14px}
.setting-row{display:grid;grid-template-columns:minmax(180px,1fr) minmax(240px,1.4fr);gap:18px;align-items:center;padding:16px;border-bottom:1px solid rgba(255,255,255,.08)}
.setting-row strong{display:block}
.setting-row small{display:block;margin-top:5px;color:var(--muted);line-height:1.55}
.setting-control{display:flex;justify-content:flex-end;gap:8px;flex-wrap:wrap}
.setting-control input[type="url"],.setting-control select{width:min(430px,100%);height:42px;padding:0 12px;border:1px solid var(--line);border-radius:10px;background:rgba(5,13,21,.72);color:#fff}
.switch{position:relative;width:48px;height:28px;display:inline-block}
.switch input{opacity:0;width:0;height:0}
.switch span{position:absolute;inset:0;border:1px solid var(--line);border-radius:999px;background:rgba(255,255,255,.08);cursor:pointer;transition:.2s}
.switch span::after{content:"";position:absolute;width:20px;height:20px;left:3px;top:3px;border-radius:50%;background:#fff;transition:.2s}
.switch input:checked+span{border-color:rgba(255,153,80,.55);background:rgba(255,153,80,.35)}
.switch input:checked+span::after{transform:translateX(20px)}

/* precise translation hover */
.translation-highlight{position:fixed;z-index:480;display:none;pointer-events:none;border-radius:4px;background:rgba(255,177,103,.16);box-shadow:0 0 0 1px rgba(255,177,103,.38),0 5px 16px rgba(0,0,0,.18)}
.translation-highlight.show{display:block}
.translation-hover-tip{position:fixed;z-index:481;display:none;pointer-events:none;padding:5px 8px;border:1px solid rgba(255,255,255,.16);border-radius:8px;background:rgba(5,13,20,.94);box-shadow:0 9px 28px rgba(0,0,0,.32);color:rgba(255,255,255,.84);font-size:11px;white-space:nowrap}
.translation-hover-tip.show{display:block}
.context-menu{position:fixed;z-index:700;width:236px;display:none;padding:8px;border:1px solid var(--line);border-radius:16px;background:rgba(6,15,24,.98);box-shadow:var(--shadow);backdrop-filter:blur(22px)}
.context-menu.show{display:grid;gap:4px}
.context-menu header{padding:8px 10px;color:var(--accent-2);font-size:11px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.context-menu button{min-height:39px;padding:9px 10px;border:0;border-radius:10px;background:transparent;text-align:left;cursor:pointer}
.context-menu button:hover{background:rgba(255,255,255,.075)}
.translation-card{position:fixed;z-index:680;width:min(460px,calc(100vw - 22px));max-height:min(690px,calc(100vh - 22px));overflow:auto;display:grid;gap:13px;padding:17px;border:1px solid var(--line);border-radius:20px;background:rgba(6,15,24,.98);box-shadow:0 30px 100px rgba(0,0,0,.58);backdrop-filter:blur(24px)}
.translation-card.pinned{top:86px!important;right:18px!important;left:auto!important;bottom:18px;max-height:calc(100vh - 104px);border-color:rgba(255,153,80,.48)}
.translation-card-head{display:flex;align-items:flex-start;justify-content:space-between;gap:12px}
.translation-card-head strong{max-width:340px;font-size:16px;line-height:1.55;overflow-wrap:anywhere}
.translation-card-head div{display:flex;gap:5px}
.translation-card-head button{width:34px;height:34px;border:1px solid var(--line);border-radius:10px;background:rgba(255,255,255,.035);cursor:pointer}
.translation-tabs{display:flex;flex-wrap:wrap;gap:7px}
.translation-tabs button{min-height:39px;padding:8px 12px;border:1px solid var(--line);border-radius:10px;background:rgba(255,255,255,.03);cursor:pointer}
.translation-tabs button.active{border-color:rgba(255,153,80,.58);background:var(--accent-soft)}
.translation-result{min-height:86px;display:grid;gap:10px;padding:14px;border:1px solid rgba(255,255,255,.09);border-radius:13px;background:rgba(255,255,255,.032);line-height:1.75}
.translation-result h3,.translation-result p{margin:0}
.translation-result small,.translation-field span{color:var(--muted);font-size:12px}
.translation-details{display:grid;gap:9px}
.translation-field{display:grid;gap:4px;padding-top:8px;border-top:1px solid rgba(255,255,255,.07)}
.translation-actions{display:flex;flex-wrap:wrap;gap:7px}
.translation-actions button{min-height:39px;padding:8px 11px;border:1px solid var(--line);border-radius:10px;background:rgba(255,255,255,.03);cursor:pointer}

/* audio status */
.audio-toast{position:fixed;z-index:720;right:18px;bottom:18px;display:flex;align-items:center;gap:10px;max-width:min(380px,calc(100vw - 36px));padding:12px 14px;border:1px solid var(--line);border-radius:14px;background:rgba(6,15,24,.96);box-shadow:0 18px 55px rgba(0,0,0,.4);transform:translateY(20px);opacity:0;pointer-events:none;transition:.25s ease}
.audio-toast.show{transform:translateY(0);opacity:1}
.audio-toast i{width:9px;height:9px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 5px rgba(255,153,80,.13)}
.audio-toast small{color:var(--muted)}

/* jazz player */
/* music player */
.music-player{position:fixed;z-index:620;left:calc(var(--rail) + 14px);bottom:14px;width:380px;max-width:calc(100vw - var(--rail) - 30px);max-height:min(72vh,690px);overflow:hidden;border:1px solid var(--line);border-radius:20px;background:rgba(6,15,24,.96);box-shadow:0 24px 78px rgba(0,0,0,.46);backdrop-filter:blur(24px);transition:.25s ease}
.music-player.closed{display:none}
.music-main{display:grid;grid-template-columns:52px minmax(0,1fr) auto;gap:12px;align-items:center;padding:12px 12px 9px}
.music-cover{width:52px;height:52px;display:flex;align-items:flex-end;justify-content:center;gap:3px;padding:11px;border-radius:15px;background:radial-gradient(circle at 70% 20%,rgba(255,207,153,.4),transparent 38%),linear-gradient(145deg,#2d5057,#101d27);box-shadow:inset 0 1px rgba(255,255,255,.13)}
.music-cover i{width:3px;height:13px;border-radius:999px;background:#f7c897}
.music-player.playing .music-cover i{animation:eq .9s ease-in-out infinite}.music-player.playing .music-cover i:nth-child(2){animation-delay:.18s}.music-player.playing .music-cover i:nth-child(3){animation-delay:.34s}.music-player.playing .music-cover i:nth-child(4){animation-delay:.5s}
@keyframes eq{50%{height:28px;opacity:.65}}
.music-meta{min-width:0}
.music-meta strong{display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:14px}
.music-meta small{display:block;margin-top:5px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:var(--muted);font-size:9px;letter-spacing:.055em}
.music-controls{display:flex;gap:4px}
.music-controls button{width:35px;height:35px;border:1px solid var(--line);border-radius:10px;background:rgba(255,255,255,.035);cursor:pointer}
.music-now{display:flex;align-items:center;justify-content:space-between;padding:0 13px 8px;color:var(--muted);font-size:11px}.music-now b{color:var(--accent-2);font-weight:600}
.music-progress{display:grid;grid-template-columns:34px minmax(0,1fr) 34px;align-items:center;gap:7px;padding:0 13px 9px;color:var(--faint);font:500 9px/1 Arial}
.music-progress input{width:100%;accent-color:var(--accent)}
.music-tools{display:grid;grid-template-columns:minmax(0,1.55fr) minmax(84px,.65fr) auto;align-items:center;gap:8px;padding:0 12px 10px}
.music-tools select{min-width:0;height:34px;padding:0 8px;border:1px solid var(--line);border-radius:9px;background:#091722;color:#fff;font-size:11px}
.music-tools input[type="range"]{min-width:0;width:100%;accent-color:var(--accent)}
.music-tools button{min-height:34px;padding:4px 9px;border:1px solid var(--line);border-radius:9px;background:rgba(255,255,255,.03);cursor:pointer;font-size:11px}
.track-list{display:none;max-height:310px;overflow:auto;padding:3px 9px 9px;border-top:1px solid rgba(255,255,255,.07)}
.music-player.expanded .track-list{display:grid;gap:3px}
.track-list button{grid-template-columns:30px minmax(0,1fr) auto}
.track-list button em{color:var(--faint);font-size:9px;font-style:normal;letter-spacing:.04em}
.track-list button.active{border-color:rgba(255,153,80,.42);background:linear-gradient(90deg,rgba(255,153,80,.15),rgba(255,255,255,.035))}
.track-list button.active em{color:var(--accent-2)}
.track-list button{width:100%;display:grid;grid-template-columns:25px minmax(0,1fr);gap:9px;align-items:center;padding:9px;border:0;border-radius:10px;background:transparent;text-align:left;cursor:pointer}
.track-list button:hover,.track-list button.active{background:rgba(255,153,80,.11)}
.track-list button>span{color:var(--faint);font:600 10px/1 Arial}.track-list button div{min-width:0}.track-list button strong{display:block;font-size:12px}.track-list button small{display:block;margin-top:3px;color:var(--muted);font-size:9px;letter-spacing:.04em}
.music-library-toggle{width:100%;min-height:34px;border:0;border-top:1px solid rgba(255,255,255,.07);background:rgba(255,255,255,.025);color:var(--muted);cursor:pointer;font-size:11px}.music-library-toggle:hover{color:#fff;background:rgba(255,153,80,.08)}
.music-reopen{position:fixed;z-index:619;left:calc(var(--rail) + 14px);bottom:14px;width:46px;height:46px;display:none;border:1px solid var(--line);border-radius:14px;background:rgba(6,15,24,.91);box-shadow:0 15px 44px rgba(0,0,0,.34);cursor:pointer}
.music-reopen.show{display:grid;place-items:center}

/* intro */
.intro-overlay{position:fixed;z-index:1000;inset:0;overflow:hidden;display:grid;place-items:center;background:#040a10}
.intro-scenes{position:absolute;inset:0;overflow:hidden}
.intro-scene{position:absolute;inset:-5%;background:center/cover no-repeat;filter:saturate(.9) brightness(.7);opacity:0;transform:scale(1.11);will-change:opacity,transform}
.intro-scene-a{animation:introSceneA 7.4s ease both}.intro-scene-b{animation:introSceneB 7.4s ease both}.intro-scene-c{animation:introSceneC 7.4s ease both}
@keyframes introSceneA{0%{opacity:1;transform:scale(1.11)}34%{opacity:1}49%{opacity:0;transform:scale(1.045)}100%{opacity:0}}
@keyframes introSceneB{0%,28%{opacity:0;transform:scale(1.1)}44%{opacity:1}68%{opacity:1}82%,100%{opacity:0;transform:scale(1.035)}}
@keyframes introSceneC{0%,62%{opacity:0;transform:scale(1.1)}78%,100%{opacity:1;transform:scale(1.025)}}
.intro-atmosphere{position:absolute;z-index:1;inset:0;overflow:hidden}.intro-atmosphere i{position:absolute;width:65vw;height:20vh;border-radius:50%;background:rgba(220,238,238,.08);filter:blur(70px)}.intro-atmosphere i:nth-child(1){left:-30vw;top:18%;animation:introMistOne 7s ease-in-out infinite alternate}.intro-atmosphere i:nth-child(2){right:-30vw;top:48%;animation:introMistTwo 8.5s ease-in-out infinite alternate-reverse}.intro-atmosphere i:nth-child(3){left:20%;bottom:-10%;background:rgba(255,190,125,.075);animation:introMistThree 9s ease-in-out infinite alternate}
@keyframes introMistOne{to{transform:translateX(65vw) scale(1.2);opacity:.35}}@keyframes introMistTwo{to{transform:translateX(-58vw) translateY(-8vh);opacity:.55}}@keyframes introMistThree{to{transform:translateY(-20vh) scale(.8);opacity:.3}}
.intro-overlay::before{content:"";position:absolute;z-index:1;inset:0;background:linear-gradient(90deg,rgba(3,8,13,.88),rgba(3,8,13,.28) 55%,rgba(3,8,13,.62)),linear-gradient(180deg,rgba(3,8,13,.18),rgba(3,8,13,.78))}
.intro-data{position:absolute;z-index:2;inset:0;overflow:hidden;pointer-events:none}
.intro-data i{position:absolute;width:1px;height:30vh;background:linear-gradient(180deg,transparent,rgba(255,207,153,.52),transparent);opacity:.35;animation:dataFall 2.8s linear infinite}
.intro-data i:nth-child(1){left:15%;animation-delay:-.3s}.intro-data i:nth-child(2){left:31%;animation-delay:-1.6s}.intro-data i:nth-child(3){left:58%;animation-delay:-.8s}.intro-data i:nth-child(4){left:77%;animation-delay:-2.1s}.intro-data i:nth-child(5){left:89%;animation-delay:-1.2s}
@keyframes dataFall{from{transform:translateY(-40vh)}to{transform:translateY(140vh)}}
.intro-content{position:relative;z-index:3;width:min(1180px,90vw);display:grid;gap:24px}
.intro-kicker{opacity:0;color:var(--accent-2);font-size:12px;letter-spacing:.2em;animation:introIn .8s .3s forwards}
.intro-content h1{max-width:1040px;margin:0;font-size:clamp(46px,6.8vw,104px);line-height:1.08;letter-spacing:-.025em;opacity:0;transform:translateY(28px);animation:introIn 1s .65s forwards}
.intro-content h1 span{display:block;margin-top:.08em;color:rgba(255,255,255,.62);font-weight:500}
.intro-content p{max-width:680px;margin:0;color:rgba(255,255,255,.7);font-size:16px;line-height:1.8;opacity:0;animation:introIn .8s 1.25s forwards}
@keyframes introIn{to{opacity:1;transform:translateY(0)}}
.intro-modules{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}
.intro-modules span{opacity:0;transform:translateY(18px);padding:8px 12px;border:1px solid rgba(255,255,255,.16);border-radius:999px;background:rgba(5,13,21,.35);font-size:12px;animation:introIn .55s forwards}
.intro-modules span:nth-child(1){animation-delay:1.7s}.intro-modules span:nth-child(2){animation-delay:1.95s}.intro-modules span:nth-child(3){animation-delay:2.2s}.intro-modules span:nth-child(4){animation-delay:2.45s}.intro-modules span:nth-child(5){animation-delay:2.7s}
.intro-stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px;max-width:760px;margin-top:12px;opacity:0;animation:introIn .8s 3.1s forwards}
.intro-stat{padding:13px 15px;border-top:1px solid rgba(255,255,255,.2);background:linear-gradient(180deg,rgba(255,255,255,.04),transparent)}
.intro-stat strong{display:block;font-size:21px}.intro-stat small{color:var(--muted)}
.intro-skip{position:absolute;z-index:4;right:24px;top:24px;min-height:38px;padding:7px 13px;border:1px solid rgba(255,255,255,.2);border-radius:999px;background:rgba(4,11,18,.46);cursor:pointer;color:rgba(255,255,255,.78)}
.intro-progress{position:absolute;z-index:4;left:0;right:0;bottom:0;height:3px;background:rgba(255,255,255,.08)}
.intro-progress i{display:block;width:0;height:100%;background:linear-gradient(90deg,var(--accent),var(--accent-2));animation:introProgress 7s linear forwards}
@keyframes introProgress{to{width:100%}}
.intro-overlay.leaving{animation:introLeave .6s ease forwards}
@keyframes introLeave{to{opacity:0;transform:scale(1.015);visibility:hidden}}

/* tutorial */
.tutorial-overlay{position:fixed;z-index:950;inset:0;display:grid;place-items:center;padding:20px;background:rgba(0,5,10,.84);backdrop-filter:blur(9px)}
.tutorial-panel{width:min(760px,94vw);display:grid;gap:18px;padding:clamp(24px,4vw,42px);border:1px solid rgba(255,255,255,.18);border-radius:26px;background:radial-gradient(circle at 82% 0%,rgba(255,153,80,.18),transparent 38%),rgba(7,16,25,.98);box-shadow:0 38px 120px rgba(0,0,0,.65)}
.tutorial-panel>span{color:var(--accent-2);font-size:11px;letter-spacing:.14em}
.tutorial-panel h2{margin:0;font-size:clamp(28px,4vw,48px)}
.tutorial-panel p{margin:0;color:var(--muted);font-size:15px;line-height:1.8}
.tutorial-demo{padding:20px;border:1px solid var(--line);border-radius:16px;background:rgba(255,255,255,.035);font-size:19px;line-height:1.8;user-select:text}
.tutorial-demo mark{padding:2px 5px;border-radius:6px;background:rgba(255,153,80,.22);color:#fff;cursor:pointer}
.tutorial-actions{display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap}

/* responsive */
@media(max-width:1180px){
  .category-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .category-card:last-child{grid-column:1/-1}
  .home-status{grid-template-columns:repeat(2,1fr)}
  .metric-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:900px){
  :root{--rail:70px}
  .main-shell{padding-left:18px;padding-right:18px}
  .page-layout{display:block}
  .subnav{position:relative;top:auto;margin-bottom:18px;display:flex;overflow:auto;padding:10px}
  .subnav-head{display:none}
  .subnav button{min-width:max-content;width:auto}
  .reader-layout,.listening-grid{grid-template-columns:1fr}
  .toolbar{grid-template-columns:1fr 1fr}
  .search-box{width:min(330px,38vw)}
  .music-player{left:calc(var(--rail) + 10px)}
  .music-reopen{left:calc(var(--rail) + 10px)}
}
@media(max-width:720px){
  :root{--rail:0px}
  .app-shell{display:block}
  .site-rail{width:min(300px,84vw);transform:translateX(-102%);transition:.25s ease;align-items:stretch;padding:18px}
  .site-rail.open{transform:translateX(0);box-shadow:30px 0 90px rgba(0,0,0,.5)}
  .brand-mark{margin:0 auto}
  .rail-button{display:flex;justify-content:flex-start;padding:0 14px}
  .rail-button span{font-size:13px}
  .main-shell{padding:0 14px 88px}
  .topbar{min-height:72px;gap:9px}
  .topbar-title{min-width:110px}
  .topbar-actions{gap:6px}
  .mobile-menu-button{display:grid}
  .topbar .home-button,.topbar .progress-button{display:none}
  .search-box{width:min(220px,48vw)}
  .search-box input{padding-left:13px;font-size:12px}
  .page-stage{padding-top:20px}
  .home-hero{min-height:auto;padding-top:34px}
  .home-copy h1{font-size:clamp(48px,15vw,78px)}
  .category-grid,.home-status,.metric-grid,.mode-options,.test-setup-grid{grid-template-columns:1fr}
  .category-card:last-child{grid-column:auto}
  .category-card{min-height:220px}
  .toolbar{grid-template-columns:1fr}
  .word-card{min-height:440px;padding:27px 20px}
  .wordbook-row,.review-row{grid-template-columns:1fr}
  .setting-row{grid-template-columns:1fr}
  .setting-control{justify-content:flex-start}
  .intro-stats{grid-template-columns:repeat(2,1fr)}
  .music-player{left:8px;right:8px;bottom:8px;width:auto;max-height:72vh}
  .music-reopen{left:8px;bottom:8px}
  .translation-card.pinned{top:auto!important;right:8px!important;left:8px!important;bottom:8px;width:auto;max-height:72vh}
  .audio-toast{right:8px;bottom:78px}
}
@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{scroll-behavior:auto!important;animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important}
}

/* RC.8 headline and music correction */
@media (max-width:980px){
  .home-hero{padding-top:44px}
  .home-copy h1{font-size:clamp(45px,7vw,70px);line-height:1.12;letter-spacing:-.018em}
}
@media (max-width:620px){
  .home-copy{gap:18px}
  .home-copy h1{font-size:clamp(40px,12vw,58px);line-height:1.13;gap:.16em;letter-spacing:-.012em}
  .home-copy p{font-size:15px;line-height:1.85}
  .music-player{max-width:none}
}
.track-list button{grid-template-columns:25px minmax(0,1fr) auto}


/* RC.9 medium-transparent scenic cards — typography intentionally unchanged */
.panel{
  background:linear-gradient(145deg,rgba(8,18,28,.54),rgba(11,24,35,.34));
  border-color:rgba(255,255,255,.15);
  box-shadow:0 18px 54px rgba(0,0,0,.18);
  backdrop-filter:blur(15px) saturate(112%);
  -webkit-backdrop-filter:blur(15px) saturate(112%);
}
.subnav{background:rgba(7,16,25,.48);backdrop-filter:blur(15px) saturate(112%);-webkit-backdrop-filter:blur(15px) saturate(112%)}
.category-card{background:linear-gradient(160deg,rgba(7,17,26,.48),rgba(7,16,24,.22));backdrop-filter:blur(13px) saturate(112%);-webkit-backdrop-filter:blur(13px) saturate(112%)}
.category-card:hover{background:linear-gradient(160deg,rgba(10,22,32,.58),rgba(255,153,80,.10))}
.status-card{background:linear-gradient(180deg,rgba(8,18,27,.38),rgba(7,15,23,.16));backdrop-filter:blur(11px);-webkit-backdrop-filter:blur(11px)}
.mode-card,.wordbook-row,.review-row,.setup-block,.choice-toggle,.answer-option,.metric-card,.audio-history button,.article-picker button{background:rgba(7,16,25,.30);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px)}
.mode-card:hover,.article-picker button:hover,.article-picker button.active,.answer-option:hover{background:rgba(255,153,80,.12)}
.toolbar{background:rgba(7,16,25,.44);backdrop-filter:blur(13px);-webkit-backdrop-filter:blur(13px)}
.word-card{background:radial-gradient(circle at 82% 13%,rgba(255,153,80,.13),transparent 34%),linear-gradient(145deg,rgba(5,13,21,.58),rgba(14,29,41,.36));backdrop-filter:blur(14px) saturate(112%);-webkit-backdrop-filter:blur(14px) saturate(112%)}
.word-table th{background:rgba(7,16,25,.72)}
.search-box input{background:rgba(7,16,25,.52)}
.notice{background:rgba(255,153,80,.065)}
@media (max-width:720px){
  .panel{background:linear-gradient(145deg,rgba(8,18,28,.60),rgba(11,24,35,.40))}
  .category-card{background:linear-gradient(160deg,rgba(7,17,26,.55),rgba(7,16,24,.30))}
}


/* RC.10 — brighter scenery, high-transparency cards, collapsible focus player */
.app-bg{
  filter:saturate(1.02) brightness(.96) contrast(1.02);
}
.app-bg-reveal{
  filter:saturate(1.08) brightness(1.16) contrast(1.02);
}
.scene-world::before{
  background:
    linear-gradient(90deg,rgba(3,9,14,.68) 0%,rgba(3,9,14,.42) 34%,rgba(3,9,14,.24) 66%,rgba(3,9,14,.46) 100%),
    linear-gradient(180deg,rgba(2,8,13,.08),rgba(2,8,13,.46));
}
.scene-world::after{
  background:
    radial-gradient(circle at var(--scene-x) var(--scene-y),rgba(255,218,178,.16),transparent 29%),
    radial-gradient(circle at 24% 82%,rgba(142,205,218,.15),transparent 41%);
}
.scene-aurora{opacity:.5}
.app-grain{opacity:.065}

/* High transparency: approximately 28–34% surface opacity. Typography unchanged. */
.panel{
  background:linear-gradient(145deg,rgba(8,18,28,.34),rgba(11,24,35,.20));
  border-color:rgba(255,255,255,.17);
  box-shadow:0 16px 46px rgba(0,0,0,.14);
  backdrop-filter:blur(12px) saturate(108%);
  -webkit-backdrop-filter:blur(12px) saturate(108%);
}
.subnav{
  background:rgba(7,16,25,.30);
  backdrop-filter:blur(12px) saturate(108%);
  -webkit-backdrop-filter:blur(12px) saturate(108%);
}
.category-card{
  background:linear-gradient(160deg,rgba(7,17,26,.30),rgba(7,16,24,.13));
  backdrop-filter:blur(10px) saturate(108%);
  -webkit-backdrop-filter:blur(10px) saturate(108%);
}
.category-card:hover{
  background:linear-gradient(160deg,rgba(10,22,32,.40),rgba(255,153,80,.08));
}
.status-card{
  background:linear-gradient(180deg,rgba(8,18,27,.24),rgba(7,15,23,.09));
  backdrop-filter:blur(9px);
  -webkit-backdrop-filter:blur(9px);
}
.mode-card,
.wordbook-row,
.review-row,
.setup-block,
.choice-toggle,
.answer-option,
.metric-card,
.audio-history button,
.article-picker button{
  background:rgba(7,16,25,.19);
  backdrop-filter:blur(8px);
  -webkit-backdrop-filter:blur(8px);
}
.mode-card:hover,
.article-picker button:hover,
.article-picker button.active,
.answer-option:hover{
  background:rgba(255,153,80,.10);
}
.toolbar{
  background:rgba(7,16,25,.28);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
}
.word-card{
  background:
    radial-gradient(circle at 82% 13%,rgba(255,153,80,.10),transparent 34%),
    linear-gradient(145deg,rgba(5,13,21,.36),rgba(14,29,41,.21));
  backdrop-filter:blur(11px) saturate(108%);
  -webkit-backdrop-filter:blur(11px) saturate(108%);
}
.word-table th{background:rgba(7,16,25,.56)}
.search-box input{background:rgba(7,16,25,.38)}
.notice{background:rgba(255,153,80,.052)}

/* Compact bottom-left state. Closing and collapsing remain separate actions. */
.music-player.collapsed{
  width:300px;
  border-radius:17px;
}
.music-player.collapsed .music-main{
  grid-template-columns:42px minmax(0,1fr) auto;
  padding:8px;
}
.music-player.collapsed .music-cover{
  width:42px;
  height:42px;
  padding:9px;
  border-radius:12px;
}
.music-player.collapsed .music-controls button{
  width:31px;
  height:31px;
}
.music-player.collapsed .music-now,
.music-player.collapsed .music-progress,
.music-player.collapsed .music-tools,
.music-player.collapsed .track-list,
.music-player.collapsed .music-library-toggle{
  display:none !important;
}
.music-player.collapsed .music-meta small{
  margin-top:3px;
}
.music-player.collapsed.expanded .track-list{
  display:none !important;
}

@media (max-width:720px){
  .app-bg{filter:saturate(1.01) brightness(.94) contrast(1.02)}
  .scene-world::before{
    background:
      linear-gradient(180deg,rgba(3,9,14,.22),rgba(3,9,14,.46)),
      linear-gradient(90deg,rgba(3,9,14,.42),rgba(3,9,14,.18));
  }
  .panel{background:linear-gradient(145deg,rgba(8,18,28,.39),rgba(11,24,35,.24))}
  .category-card{background:linear-gradient(160deg,rgba(7,17,26,.35),rgba(7,16,24,.17))}
  .music-player.collapsed{
    width:min(300px,calc(100vw - 20px));
    left:10px;
    bottom:10px;
  }
}


/* RC.11 — live news and complete review flow */
.news-command-panel,.review-dashboard{display:grid;gap:16px;padding:20px;margin-bottom:18px}
.news-command-main{display:flex;align-items:center;justify-content:space-between;gap:20px}
.news-command-main h2,.review-dashboard h2{margin:5px 0 6px;font-size:clamp(25px,3vw,39px)}
.news-command-main p,.review-dashboard .section-title p{margin:0;color:var(--muted);line-height:1.65}
.news-refresh-button{flex:none;min-width:132px;display:inline-flex;align-items:center;justify-content:center;gap:8px}
.news-search-form{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:9px}
.news-search-form input{min-height:44px;width:100%;padding:0 14px;border:1px solid var(--line);border-radius:12px;background:rgba(7,16,25,.34);color:var(--text);outline:none}
.news-search-form input:focus{border-color:rgba(255,153,80,.58);box-shadow:0 0 0 3px rgba(255,153,80,.10)}
.news-topic-row,.review-filter-row{display:flex;align-items:center;flex-wrap:wrap;gap:8px}
.chip-button{min-height:34px;padding:7px 11px;border:1px solid var(--line);border-radius:999px;background:rgba(7,16,25,.19);color:var(--muted);cursor:pointer}
.chip-button:hover,.chip-button.active{border-color:rgba(255,153,80,.48);background:rgba(255,153,80,.11);color:var(--text)}
.news-updated{margin-left:auto;color:var(--muted);font-size:12px}
.news-error-banner{display:grid;grid-template-columns:auto minmax(0,1fr) auto;align-items:center;gap:10px;padding:11px 13px;border:1px solid rgba(255,145,128,.32);border-radius:12px;background:rgba(98,29,23,.20)}
.news-error-banner span{color:rgba(255,255,255,.74);font-size:13px}.news-error-banner button{border:0;background:transparent;color:#ffd0c7;cursor:pointer}
.news-spinner{display:inline-block;width:16px;height:16px;border:2px solid rgba(255,255,255,.25);border-top-color:currentColor;border-radius:50%;animation:news-spin .8s linear infinite}.news-spinner.large{width:30px;height:30px;border-width:3px}@keyframes news-spin{to{transform:rotate(360deg)}}
.news-empty-panel{min-height:260px;display:grid;place-items:center;align-content:center;gap:12px;padding:34px;text-align:center}.news-empty-panel p{margin:0;color:var(--muted);line-height:1.7}
.live-reader-layout{align-items:start}.live-badge{color:#ffd0aa;border:1px solid rgba(255,153,80,.34);border-radius:999px;padding:3px 8px;background:rgba(255,153,80,.09)}.live-article-panel{min-height:560px}
.news-article-actions{display:flex;flex-wrap:wrap;gap:9px;margin-top:28px}.link-button{display:inline-flex;align-items:center;justify-content:center;text-decoration:none}.news-list-panel{max-height:calc(100vh - 190px);overflow:hidden}.live-news-picker{max-height:calc(100vh - 300px);overflow:auto;padding-right:4px}.live-news-picker button{width:100%}
.news-loading-block{min-height:170px;display:grid;justify-items:center;align-content:center;gap:10px;text-align:center}.news-loading-block p{margin:0;color:var(--muted);font-family:"Microsoft YaHei","微软雅黑","PingFang SC",sans-serif;font-size:13px}.news-inline-error{margin-top:12px;padding:11px 13px;border:1px solid rgba(255,145,128,.27);border-radius:11px;background:rgba(98,29,23,.16);color:#ffd5ce;font-family:"Microsoft YaHei","微软雅黑","PingFang SC",sans-serif;font-size:13px;line-height:1.6}
.review-metrics{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:11px}.review-setup-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.review-start-row{display:flex;align-items:center;gap:13px;flex-wrap:wrap}.review-start-row span{color:var(--muted);font-size:13px}
.review-session-card{min-height:650px;display:grid;align-content:center;gap:18px;padding:clamp(28px,5vw,64px)}.review-session-top,.review-session-footer{display:flex;align-items:center;justify-content:space-between;gap:14px}.review-session-top>div:first-child{display:grid;gap:4px}.review-session-count{font-size:15px;color:var(--muted)}.review-card-meta{display:flex;gap:9px;flex-wrap:wrap;color:var(--muted);font-size:12px}.review-session-card>h2{margin:0;font-size:clamp(56px,8vw,104px);line-height:1;letter-spacing:-.045em;overflow-wrap:anywhere}.review-recall-copy{max-width:720px;color:var(--muted);font-size:16px;line-height:1.8}.review-answer{display:grid;gap:11px;max-width:850px}.review-answer strong{font-size:clamp(20px,2.2vw,30px);line-height:1.55}.review-answer p{margin:0;color:rgba(255,255,255,.78);font-size:16px;line-height:1.78}.review-primary-actions,.review-result-actions{display:flex;flex-wrap:wrap;gap:9px}.review-rating-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px}.review-rating{min-height:96px;display:grid;gap:6px;padding:15px;border:1px solid var(--line);border-radius:15px;background:rgba(7,16,25,.22);color:var(--text);text-align:left;cursor:pointer}.review-rating strong{font-size:18px}.review-rating small{color:var(--muted);line-height:1.4}.review-rating.forgot{border-color:rgba(255,120,110,.46)}.review-rating.hard{border-color:rgba(255,184,103,.43)}.review-rating.good{border-color:rgba(109,214,150,.42)}.review-rating.easy{border-color:rgba(104,188,255,.42)}.review-rating:hover{transform:translateY(-2px);background:rgba(255,255,255,.07)}
.text-button{border:0;background:transparent;color:var(--muted);cursor:pointer}.review-result-card{min-height:560px;display:grid;align-content:center;gap:18px;padding:clamp(28px,5vw,64px);text-align:center}.review-result-card .review-metrics{text-align:left}.review-result-card .review-result-actions{justify-content:center}
@media(max-width:850px){.review-metrics{grid-template-columns:repeat(2,minmax(0,1fr))}.review-setup-grid{grid-template-columns:1fr}.review-rating-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:720px){.news-command-main{align-items:stretch;flex-direction:column}.news-refresh-button{width:100%}.news-search-form{grid-template-columns:1fr}.news-updated{width:100%;margin-left:0}.news-error-banner{grid-template-columns:1fr}.news-list-panel,.live-news-picker{max-height:none}.review-metrics{grid-template-columns:1fr 1fr}.review-session-card{min-height:570px;padding:26px 18px}.review-session-card>h2{font-size:clamp(48px,16vw,76px)}.review-rating-grid{grid-template-columns:1fr 1fr}.review-session-footer{align-items:flex-start;flex-direction:column}}


/* --------------------------------------------------------------------------
   RC.13 Word Engine — complete vocabulary learning system
   -------------------------------------------------------------------------- */
.vocab-hero-panel{min-height:280px;display:grid;grid-template-columns:minmax(0,1.35fr) auto;gap:30px;align-items:center;padding:clamp(28px,4.4vw,58px);overflow:hidden;background:radial-gradient(circle at 84% 20%,rgba(255,153,80,.16),transparent 31%),linear-gradient(145deg,rgba(7,17,26,.31),rgba(7,16,24,.13))}
.vocab-hero-copy{display:grid;gap:13px}.vocab-hero-copy h2{max-width:850px;margin:0;font-size:clamp(31px,4.5vw,62px);line-height:1.12;letter-spacing:-.045em}.vocab-hero-copy p{max-width:760px;margin:0;color:var(--muted);font-size:15px;line-height:1.85}
.vocab-ring{width:154px;height:154px;display:grid;place-items:center;border-radius:50%;background:conic-gradient(var(--accent) var(--progress),rgba(255,255,255,.09) 0);box-shadow:0 20px 50px rgba(0,0,0,.18)}.vocab-ring::before{content:"";position:absolute;width:124px;height:124px;border-radius:50%;background:rgba(5,13,21,.76);backdrop-filter:blur(12px)}.vocab-ring>div{position:relative;display:grid;text-align:center}.vocab-ring strong{font-size:30px}.vocab-ring span{color:var(--muted);font-size:11px}
.vocab-metric-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}.vocab-metric{min-height:132px;display:grid;align-content:center;gap:7px;padding:20px;background:linear-gradient(155deg,rgba(8,18,28,.30),rgba(11,24,35,.14))}.vocab-metric small,.vocab-metric span{color:var(--muted)}.vocab-metric strong{font-size:38px;line-height:1}.vocab-metric span{font-size:12px}
.daily-route-panel select,.vocab-explorer-toolbar select,.study-source-panel select,.context-setup select,.wordbook-toolbar-rich input,.vocab-explorer-toolbar input,.study-source-panel input,.context-setup input,.wordbook-toolbar-rich select,.vocab-batch-bar select{min-height:42px;padding:0 12px;border:1px solid var(--line);border-radius:11px;background:rgba(5,13,21,.58);color:var(--text);outline:none}
.daily-route-list{display:grid;gap:10px}.daily-route-list article{display:grid;grid-template-columns:54px minmax(0,1fr) auto;gap:16px;align-items:center;padding:17px;border:1px solid rgba(255,255,255,.10);border-radius:15px;background:rgba(7,16,25,.17)}.daily-route-list article>span{width:44px;height:44px;display:grid;place-items:center;border:1px solid rgba(255,153,80,.36);border-radius:13px;color:var(--accent-2);font-size:12px}.daily-route-list strong{font-size:17px}.daily-route-list p{margin:5px 0 0;color:var(--muted);font-size:13px;line-height:1.55}
.vocab-action-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.vocab-action-card{min-height:210px;display:flex;flex-direction:column;align-items:flex-start;gap:10px;padding:22px;text-align:left;cursor:pointer;transition:.24s ease}.vocab-action-card:hover{transform:translateY(-4px);border-color:rgba(255,153,80,.45);background:linear-gradient(145deg,rgba(255,153,80,.10),rgba(7,16,25,.14))}.vocab-action-card>span{color:var(--accent-2);font-size:10px;letter-spacing:.13em}.vocab-action-card strong{font-size:23px}.vocab-action-card p{margin:0;color:var(--muted);line-height:1.7}.vocab-action-card i{margin-top:auto;color:var(--accent-2);font-style:normal;font-size:12px}

.vocab-explorer-toolbar{display:grid;gap:12px;padding:14px;background:rgba(7,16,25,.24)}.explorer-search{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:12px;align-items:center}.explorer-search input{width:100%;min-height:48px}.explorer-search span{color:var(--muted);font-size:12px}.explorer-filters{display:grid;grid-template-columns:repeat(5,minmax(120px,1fr)) auto auto;gap:8px}.explorer-filters select{width:100%}
.vocab-batch-bar{position:sticky;top:88px;z-index:9;display:none;grid-template-columns:auto auto auto auto;justify-content:start;align-items:center;gap:9px;padding:12px 14px;border:1px solid rgba(255,153,80,.35);border-radius:15px;background:rgba(6,15,24,.88);box-shadow:0 16px 50px rgba(0,0,0,.24);backdrop-filter:blur(18px)}.vocab-batch-bar.show{display:grid}.vocab-batch-bar strong{margin-right:8px}
.word-explorer-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.explorer-word-card{min-height:278px;display:flex;flex-direction:column;gap:11px;padding:19px;background:linear-gradient(150deg,rgba(7,17,26,.28),rgba(7,16,24,.11));transition:.23s ease}.explorer-word-card:hover{transform:translateY(-3px);border-color:rgba(255,153,80,.35)}.explorer-card-top{display:flex;align-items:center;justify-content:space-between}.explorer-card-top label{display:grid;place-items:center}.explorer-card-top input{width:17px;height:17px;accent-color:var(--accent)}
.explorer-word-title,.word-link{border:0;background:transparent;color:var(--text);text-align:left;cursor:pointer}.explorer-word-title{padding:0;font-size:clamp(27px,2.5vw,39px);font-weight:800;letter-spacing:-.045em;overflow-wrap:anywhere}.explorer-word-title:hover,.word-link:hover{color:var(--accent-2)}.explorer-word-card>p{min-height:44px;margin:0;color:rgba(255,255,255,.73);line-height:1.55}.word-tag-row,.wordbook-tags{display:flex;flex-wrap:wrap;gap:6px}.word-tag-row span,.wordbook-tags span{padding:4px 7px;border:1px solid rgba(255,255,255,.10);border-radius:999px;color:var(--muted);font-size:10px}.mini-mastery{display:grid;grid-template-columns:minmax(0,1fr) 32px;align-items:center;gap:10px;margin-top:auto}.mini-mastery>div,.category-progress-grid article>div,.status-distribution>div>div{height:5px;overflow:hidden;border-radius:999px;background:rgba(255,255,255,.08)}.mini-mastery i,.category-progress-grid i,.status-distribution i{display:block;height:100%;border-radius:inherit;background:linear-gradient(90deg,var(--accent),var(--accent-2))}.mini-mastery strong{color:var(--muted);font-size:11px}.explorer-card-actions{display:grid;grid-template-columns:repeat(3,1fr);gap:6px}.explorer-card-actions button,.icon-text-button{min-height:34px;padding:6px 8px;border:1px solid var(--line);border-radius:9px;background:rgba(255,255,255,.025);color:var(--muted);font-size:11px;cursor:pointer}.explorer-card-actions button:hover,.icon-text-button:hover{border-color:rgba(255,153,80,.4);color:var(--text)}
.status-pill{display:inline-flex;align-items:center;width:max-content;min-height:26px;padding:3px 8px;border:1px solid var(--line);border-radius:999px;font-size:10px}.status-pill.new{color:#c7d0d8}.status-pill.learning{border-color:rgba(104,188,255,.35);color:#bce0ff;background:rgba(104,188,255,.07)}.status-pill.weak{border-color:rgba(255,145,128,.37);color:#ffd0c7;background:rgba(255,145,128,.07)}.status-pill.mastered{border-color:rgba(109,214,150,.36);color:#c6f3d6;background:rgba(109,214,150,.07)}.status-pill.due{border-color:rgba(255,184,103,.40);color:#ffe0b4;background:rgba(255,184,103,.08)}
.advanced-word-table td:first-child{font-size:initial;font-weight:initial;cursor:default}.advanced-word-table input{width:16px;height:16px;accent-color:var(--accent)}.word-link{padding:0;font-size:17px;font-weight:750}

.word-detail-shell{display:grid;gap:22px;padding:clamp(24px,4vw,48px);background:radial-gradient(circle at 83% 20%,rgba(255,153,80,.17),transparent 30%),linear-gradient(145deg,rgba(7,17,26,.32),rgba(7,16,24,.14))}.word-detail-back{width:max-content;padding:0;border:0;background:transparent;color:var(--muted);cursor:pointer}.word-detail-back:hover{color:var(--text)}.word-detail-hero{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:24px;align-items:end}.word-detail-hero h2{margin:12px 0 8px;font-size:clamp(58px,8vw,112px);line-height:.92;letter-spacing:-.065em;overflow-wrap:anywhere}.word-detail-hero p{max-width:850px;margin:0;color:rgba(255,255,255,.82);font-size:clamp(18px,2vw,26px);line-height:1.55}.word-detail-tags{display:flex;flex-wrap:wrap;gap:7px}.word-detail-tags span{padding:5px 9px;border:1px solid var(--line);border-radius:999px;color:var(--muted);font-size:10px}.word-detail-score{min-width:170px;display:grid;justify-items:end;gap:4px}.word-detail-score strong{font-size:58px;line-height:1}.word-detail-score span,.word-detail-score small{color:var(--muted)}.word-detail-actions{display:flex;flex-wrap:wrap;gap:8px}
.word-detail-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.detail-section{display:grid;align-content:start;gap:14px;padding:clamp(20px,3vw,31px)}.detail-section.wide{grid-column:1/-1}.detail-section h3{margin:0;font-size:24px}.detail-hint{margin:0;color:var(--muted);font-size:13px;line-height:1.75}.definition-stack{display:grid;gap:10px}.definition-stack article{padding:15px;border:1px solid rgba(255,255,255,.09);border-radius:14px;background:rgba(7,16,25,.15)}.definition-stack small,.relation-columns small{display:block;margin-bottom:8px;color:var(--muted);font-size:10px;letter-spacing:.08em;text-transform:uppercase}.definition-stack strong{font-size:19px;line-height:1.6}.definition-stack p{margin:0;color:rgba(255,255,255,.76);line-height:1.75}.english-content{font-family:Georgia,"Times New Roman",serif!important}.dimension-bars{display:grid;gap:10px}.dimension-row{display:grid;grid-template-columns:82px minmax(0,1fr) 32px;gap:10px;align-items:center}.dimension-row span,.dimension-row strong{color:var(--muted);font-size:11px}.dimension-row>div{height:7px;overflow:hidden;border-radius:999px;background:rgba(255,255,255,.08)}.dimension-row i{display:block;height:100%;border-radius:inherit;background:linear-gradient(90deg,var(--accent),var(--accent-2))}.dimension-bars.compact .dimension-row{grid-template-columns:68px minmax(0,1fr) 28px;gap:7px}
.relation-columns{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}.relation-chips{display:flex;flex-wrap:wrap;gap:7px}.relation-chips button,.relation-chips span,.related-word-list button{padding:7px 9px;border:1px solid var(--line);border-radius:10px;background:rgba(7,16,25,.14);color:var(--muted);font-size:12px}.relation-chips button{cursor:pointer}.relation-chips button:hover{color:var(--text);border-color:rgba(255,153,80,.4)}.root-inline-card{display:grid;grid-template-columns:auto 1fr;gap:5px 11px;width:100%;padding:13px;border:1px solid var(--line);border-radius:13px;background:rgba(7,16,25,.14);color:var(--text);text-align:left;cursor:pointer}.root-inline-card strong{grid-row:1/3;font-size:20px;color:var(--accent-2)}.root-inline-card span{font-weight:700}.root-inline-card small{color:var(--muted)}.related-word-list{display:grid;gap:7px;margin-top:5px}.related-word-list button{display:grid;grid-template-columns:100px 1fr;gap:10px;text-align:left;cursor:pointer}.related-word-list strong{color:var(--text)}.related-word-list span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.cloud-profile p{margin:0;color:rgba(255,255,255,.78);line-height:1.8;white-space:pre-wrap}.cloud-profile small{display:block;margin-top:9px;color:var(--muted)}.detail-section textarea{min-height:150px;resize:vertical;padding:14px;border:1px solid var(--line);border-radius:13px;background:rgba(5,13,21,.42);color:var(--text);line-height:1.7;outline:none}.detail-section textarea:focus{border-color:rgba(255,153,80,.48)}.note-actions{display:flex;align-items:center;justify-content:space-between;gap:12px}.note-actions span{color:var(--muted);font-size:11px}.category-progress-grid{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:10px}.category-progress-grid article{display:grid;gap:8px;padding:13px;border:1px solid rgba(255,255,255,.09);border-radius:13px;background:rgba(7,16,25,.14)}.category-progress-grid small{color:var(--muted);font-size:10px;line-height:1.5}

.study-setup-hero,.context-intro,.family-intro,.insights-hero,.wordbook-command{display:grid;gap:13px;padding:clamp(25px,4vw,45px)}.study-setup-hero h2,.context-intro h2,.family-intro h2,.insights-hero h2,.wordbook-command h2{max-width:900px;margin:0;font-size:clamp(30px,4vw,55px);line-height:1.14;letter-spacing:-.04em}.study-setup-hero p,.context-intro p,.family-intro p,.insights-hero p,.wordbook-command p{max-width:800px;margin:0;color:var(--muted);line-height:1.8}.study-mode-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.study-mode-card{min-height:210px;display:flex;flex-direction:column;align-items:flex-start;gap:10px;padding:22px;color:var(--text);text-align:left;cursor:pointer}.study-mode-card>span{color:var(--accent-2);font-size:10px;letter-spacing:.14em}.study-mode-card strong{font-size:24px}.study-mode-card p{margin:0;color:var(--muted);line-height:1.65}.study-mode-card small{margin-top:auto;color:var(--faint)}.study-mode-card.active{border-color:rgba(255,153,80,.56);background:linear-gradient(145deg,rgba(255,153,80,.11),rgba(7,16,25,.13));box-shadow:inset 0 0 0 1px rgba(255,153,80,.10)}
.study-source-panel{display:grid;gap:18px}.study-setup-grid-rich{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px}.study-setup-grid-rich label,.context-setup label{display:grid;gap:7px}.study-setup-grid-rich label span,.context-setup label span{color:var(--muted);font-size:11px}.study-start-line{display:flex;align-items:center;gap:14px;flex-wrap:wrap}.study-start-line span{color:var(--muted);font-size:12px}
.active-study-shell,.active-context-shell{min-height:680px;display:grid;align-content:center;gap:28px;padding:clamp(24px,5vw,64px)}.study-session-top{display:grid;grid-template-columns:auto minmax(140px,1fr) auto;gap:18px;align-items:center}.study-session-top>div:first-child{display:grid;gap:4px}.study-session-top span{color:var(--muted);font-size:11px}.study-session-top strong{font-size:16px}.study-progress-track{height:5px;overflow:hidden;border-radius:999px;background:rgba(255,255,255,.08)}.study-progress-track i{display:block;height:100%;border-radius:inherit;background:linear-gradient(90deg,var(--accent),var(--accent-2))}.study-prompt{display:grid;justify-items:center;gap:20px;text-align:center}.study-prompt>span,.context-question>span{color:var(--accent-2);font-size:11px;letter-spacing:.13em;text-transform:uppercase}.study-prompt h2{margin:0;font-size:clamp(58px,9vw,118px);line-height:.95;letter-spacing:-.065em;overflow-wrap:anywhere}.study-prompt h3{max-width:800px;margin:0;font-size:clamp(25px,3.4vw,46px);line-height:1.35}.study-reveal,.study-final-answer{max-width:850px;display:grid;gap:10px;padding:20px;border:1px solid rgba(255,153,80,.24);border-radius:16px;background:rgba(255,153,80,.06)}.study-reveal strong,.study-final-answer strong{font-size:22px}.study-reveal p,.study-final-answer p{margin:0;color:var(--muted);line-height:1.75}.audio-orb{width:92px;height:92px;border:1px solid rgba(255,153,80,.55);border-radius:50%;background:radial-gradient(circle,rgba(255,153,80,.23),rgba(255,153,80,.05));color:var(--text);font-size:28px;cursor:pointer;box-shadow:0 20px 55px rgba(0,0,0,.25)}.audio-orb:hover{transform:scale(1.04)}
.study-option-grid{width:min(900px,100%);display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.study-option-grid button{min-height:72px;padding:14px;border:1px solid var(--line);border-radius:14px;background:rgba(7,16,25,.18);color:var(--text);font-size:17px;cursor:pointer}.study-option-grid.meanings button{min-height:92px;text-align:left;font-size:14px;line-height:1.55}.study-option-grid button:hover:not(:disabled){border-color:rgba(255,153,80,.45);background:rgba(255,153,80,.08)}.study-option-grid button.correct{border-color:rgba(109,214,150,.58);background:rgba(109,214,150,.12)}.study-option-grid button.wrong{border-color:rgba(255,145,128,.58);background:rgba(255,145,128,.10)}.study-prompt.spelling form{width:min(620px,100%);display:grid;grid-template-columns:minmax(0,1fr) auto;gap:9px}.study-prompt.spelling input{min-height:50px;padding:0 15px;border:1px solid var(--line);border-radius:13px;background:rgba(5,13,21,.48);color:var(--text);font-size:20px;outline:none}.spelling-result{padding:10px 14px;border-radius:11px}.spelling-result.correct{color:#c6f3d6;background:rgba(109,214,150,.08)}.spelling-result.wrong{color:#ffd0c7;background:rgba(255,145,128,.08)}.study-feedback{width:min(760px,100%);display:grid;justify-items:center;gap:8px;padding:15px;border:1px solid var(--line);border-radius:14px}.study-feedback.correct{border-color:rgba(109,214,150,.35);background:rgba(109,214,150,.06)}.study-feedback.wrong{border-color:rgba(255,145,128,.35);background:rgba(255,145,128,.06)}.study-feedback p{margin:0;color:var(--muted);line-height:1.6}.study-rating-grid{width:min(900px,100%);display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:9px}.study-rating-grid button{min-height:94px;display:grid;gap:5px;padding:14px;border:1px solid var(--line);border-radius:14px;background:rgba(7,16,25,.17);color:var(--text);text-align:left;cursor:pointer}.study-rating-grid button:hover{border-color:rgba(255,153,80,.45);transform:translateY(-2px)}.study-rating-grid strong{font-size:17px}.study-rating-grid small{color:var(--muted)}
.study-result-shell,.context-result{min-height:570px;display:grid;align-content:center;justify-items:center;gap:18px;padding:clamp(28px,5vw,64px);text-align:center}.study-result-shell h2,.context-result h2{margin:0;font-size:clamp(38px,5vw,70px)}.study-result-shell>p{max-width:700px;margin:0;color:var(--muted);line-height:1.75}.study-result-metrics{width:100%;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px}.study-result-metrics article{display:grid;gap:7px;padding:18px;border:1px solid rgba(255,255,255,.09);border-radius:14px;background:rgba(7,16,25,.15);text-align:left}.study-result-metrics small{color:var(--muted)}.study-result-metrics strong{font-size:28px}.weak-result-list{width:100%;display:grid;gap:10px;text-align:left}.weak-result-list>div{display:flex;flex-wrap:wrap;gap:7px}.weak-result-list button{padding:7px 10px;border:1px solid var(--line);border-radius:10px;background:rgba(7,16,25,.16);color:var(--text);cursor:pointer}

.family-intro{grid-template-columns:minmax(0,1fr) minmax(230px,.45fr);align-items:end}.family-intro input{min-height:48px;padding:0 14px;border:1px solid var(--line);border-radius:12px;background:rgba(5,13,21,.44);color:var(--text);outline:none}.family-layout{display:grid;grid-template-columns:250px minmax(0,1fr);gap:14px;align-items:start}.root-card-list{position:sticky;top:104px;max-height:calc(100vh - 126px);overflow:auto;display:grid;gap:6px;padding:10px}.root-card-list button{display:grid;grid-template-columns:72px minmax(0,1fr);gap:3px 10px;padding:12px;border:1px solid transparent;border-radius:12px;background:transparent;color:var(--text);text-align:left;cursor:pointer}.root-card-list button:hover,.root-card-list button.active{border-color:rgba(255,153,80,.35);background:rgba(255,153,80,.08)}.root-card-list strong{grid-row:1/3;color:var(--accent-2);font-size:18px}.root-card-list span{font-size:12px}.root-card-list small{color:var(--muted);font-size:10px}.root-detail-panel{display:grid;gap:24px;padding:clamp(23px,4vw,42px)}.root-detail-head{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:20px}.root-detail-head h2{margin:0;font-size:clamp(58px,8vw,104px);line-height:.9;letter-spacing:-.06em}.root-detail-head>div:first-child>strong{display:block;margin-top:13px;font-size:22px}.root-detail-head p{margin:7px 0;color:var(--muted)}.root-detail-head small{color:var(--faint)}.root-count{display:grid;align-content:end;justify-items:end}.root-count strong{font-size:48px}.root-count span{color:var(--muted)}.root-word-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px}.root-word-grid button{min-height:105px;display:grid;align-content:start;gap:7px;padding:13px;border:1px solid rgba(255,255,255,.09);border-radius:12px;background:rgba(7,16,25,.14);color:var(--text);text-align:left;cursor:pointer}.root-word-grid button:hover{border-color:rgba(255,153,80,.40)}.root-word-grid strong{font-size:17px}.root-word-grid span{overflow:hidden;color:var(--muted);font-size:11px;line-height:1.45}.root-word-grid small{color:var(--faint);font-size:9px}.root-quiz{display:grid;gap:13px;padding:18px;border:1px solid rgba(255,153,80,.24);border-radius:15px;background:rgba(255,153,80,.05)}.root-quiz>div:first-child{display:grid;gap:6px}.root-quiz>div:first-child span{color:var(--accent-2);font-size:10px}.root-quiz>div:nth-child(2){display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:8px}.root-quiz>div:nth-child(2) button{min-height:55px;border:1px solid var(--line);border-radius:11px;background:rgba(7,16,25,.17);color:var(--text);cursor:pointer}.root-quiz button.correct{border-color:rgba(109,214,150,.55);background:rgba(109,214,150,.10)}.root-quiz button.wrong{border-color:rgba(255,145,128,.55);background:rgba(255,145,128,.09)}

.context-setup{display:grid;grid-template-columns:repeat(2,minmax(0,1fr)) auto;gap:10px;align-items:end;margin-top:12px}.context-feature-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.context-feature-grid article{min-height:150px;display:grid;align-content:center;gap:8px;padding:21px}.context-feature-grid strong{font-size:21px}.context-feature-grid p{margin:0;color:var(--muted);line-height:1.6}.context-question{display:grid;justify-items:center;gap:20px;text-align:center}.context-question h2{max-width:900px;margin:0;font-size:clamp(27px,4vw,50px);line-height:1.45}

.wordbook-command{grid-template-columns:minmax(0,1fr) auto;align-items:end}.wordbook-command-actions{display:flex;flex-wrap:wrap;justify-content:flex-end;gap:8px}.file-button{position:relative;display:inline-flex;align-items:center;justify-content:center}.file-button input{position:absolute;width:1px;height:1px;opacity:0}.wordbook-category-grid{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:9px}.wordbook-category-grid button{min-height:84px;display:grid;align-content:center;gap:5px;padding:13px;border:1px solid var(--line);border-radius:13px;background:rgba(7,16,25,.14);color:var(--text);text-align:left;cursor:pointer}.wordbook-category-grid button.active,.wordbook-category-grid button:hover{border-color:rgba(255,153,80,.42);background:rgba(255,153,80,.07)}.wordbook-category-grid strong{font-size:22px}.wordbook-category-grid span{color:var(--muted);font-size:11px}.wordbook-toolbar-rich{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:10px;padding:13px}.wordbook-toolbar-rich>div{display:grid;grid-template-columns:180px auto;gap:8px}.enhanced-wordbook-list{display:grid;gap:8px}.enhanced-wordbook-list article{display:grid;grid-template-columns:auto minmax(180px,1.5fr) minmax(180px,1fr) 130px auto;gap:12px;align-items:center;padding:13px;border:1px solid rgba(255,255,255,.09);border-radius:13px;background:rgba(7,16,25,.14)}.enhanced-wordbook-list>article>input{width:16px;height:16px;accent-color:var(--accent)}.wordbook-word{display:grid;gap:4px;padding:0;border:0;background:transparent;color:var(--text);text-align:left;cursor:pointer}.wordbook-word strong{font-size:19px}.wordbook-word span{overflow:hidden;color:var(--muted);font-size:12px;text-overflow:ellipsis;white-space:nowrap}.enhanced-wordbook-list>article>small{color:var(--muted);font-size:10px}

.insights-hero{grid-template-columns:minmax(0,1fr) auto;align-items:center}.insights-hero>div:last-child{display:grid;justify-items:end}.insights-hero>div:last-child strong{font-size:62px}.insights-hero>div:last-child span{color:var(--muted)}.insight-metric-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px}.insight-metric-grid article{min-height:130px;display:grid;align-content:center;gap:7px;padding:18px}.insight-metric-grid small,.insight-metric-grid span{color:var(--muted)}.insight-metric-grid strong{font-size:34px}.insights-main-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.status-distribution{display:grid;gap:12px}.status-distribution>div{display:grid;grid-template-columns:80px 52px minmax(0,1fr);gap:10px;align-items:center}.status-distribution>div>strong{font-size:14px}.weak-word-table{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px}.weak-word-table button{min-height:95px;display:grid;gap:5px;padding:13px;border:1px solid rgba(255,255,255,.09);border-radius:12px;background:rgba(7,16,25,.13);color:var(--text);text-align:left;cursor:pointer}.weak-word-table button:hover{border-color:rgba(255,153,80,.38)}.weak-word-table strong{font-size:18px}.weak-word-table span{overflow:hidden;color:var(--muted);font-size:11px;text-overflow:ellipsis;white-space:nowrap}.weak-word-table small{color:var(--faint)}.recent-session-list{display:grid;gap:8px}.recent-session-list article{display:grid;grid-template-columns:160px minmax(0,1fr) auto;gap:12px;align-items:center;padding:13px;border:1px solid rgba(255,255,255,.09);border-radius:12px;background:rgba(7,16,25,.13)}.recent-session-list span,.recent-session-list small{color:var(--muted);font-size:11px}

@media(max-width:1180px){
  .explorer-filters{grid-template-columns:repeat(3,minmax(120px,1fr))}.word-explorer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.category-progress-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.root-word-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.wordbook-category-grid{grid-template-columns:repeat(4,minmax(0,1fr))}.enhanced-wordbook-list article{grid-template-columns:auto minmax(160px,1.5fr) minmax(140px,1fr) auto}.enhanced-wordbook-list>article>small{display:none}.weak-word-table{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media(max-width:900px){
  .vocab-hero-panel,.word-detail-hero,.family-intro,.wordbook-command,.insights-hero{grid-template-columns:1fr}.vocab-ring{display:none}.vocab-metric-grid,.insight-metric-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.vocab-action-grid,.study-mode-grid,.context-feature-grid{grid-template-columns:1fr}.word-detail-score,.insights-hero>div:last-child{justify-items:start}.word-detail-grid,.insights-main-grid{grid-template-columns:1fr}.detail-section.wide{grid-column:auto}.relation-columns{grid-template-columns:1fr}.study-setup-grid-rich{grid-template-columns:repeat(2,minmax(0,1fr))}.family-layout{grid-template-columns:1fr}.root-card-list{position:static;max-height:none;grid-template-columns:repeat(3,minmax(0,1fr))}.root-card-list button{grid-template-columns:1fr}.root-card-list strong{grid-row:auto}.wordbook-command-actions{justify-content:flex-start}.enhanced-wordbook-list article{grid-template-columns:auto minmax(0,1fr) auto}.enhanced-wordbook-list .wordbook-tags{display:none}.recent-session-list article{grid-template-columns:1fr}.study-result-metrics{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media(max-width:720px){
  .vocab-hero-panel{min-height:0;padding:24px 18px}.vocab-hero-copy h2{font-size:34px}.vocab-metric-grid,.insight-metric-grid{grid-template-columns:1fr 1fr}.daily-route-list article{grid-template-columns:42px minmax(0,1fr)}.daily-route-list article button{grid-column:1/-1;width:100%}.explorer-search{grid-template-columns:1fr}.explorer-filters{grid-template-columns:1fr 1fr}.explorer-filters button{width:100%}.vocab-batch-bar{top:70px;grid-template-columns:1fr 1fr}.vocab-batch-bar strong{grid-column:1/-1}.word-explorer-grid{grid-template-columns:1fr}.word-detail-hero h2{font-size:64px}.word-detail-actions{display:grid;grid-template-columns:1fr 1fr}.word-detail-actions button{width:100%}.category-progress-grid{grid-template-columns:1fr 1fr}.study-setup-grid-rich{grid-template-columns:1fr}.active-study-shell,.active-context-shell{min-height:580px;padding:22px 15px}.study-session-top{grid-template-columns:1fr auto}.study-session-top .study-progress-track{grid-column:1/-1;grid-row:2}.study-prompt h2{font-size:58px}.study-option-grid{grid-template-columns:1fr}.study-prompt.spelling form{grid-template-columns:1fr}.study-rating-grid{grid-template-columns:1fr 1fr}.root-card-list{display:flex;overflow:auto}.root-card-list button{min-width:150px}.root-detail-head{grid-template-columns:1fr}.root-count{justify-items:start}.root-word-grid{grid-template-columns:1fr}.root-quiz>div:nth-child(2){grid-template-columns:1fr 1fr}.context-setup{grid-template-columns:1fr}.wordbook-category-grid{display:flex;overflow:auto}.wordbook-category-grid button{min-width:120px}.wordbook-toolbar-rich{grid-template-columns:1fr}.wordbook-toolbar-rich>div{grid-template-columns:1fr}.enhanced-wordbook-list article{grid-template-columns:auto minmax(0,1fr) auto}.enhanced-wordbook-list .icon-text-button{display:none}.weak-word-table{grid-template-columns:1fr}.study-result-metrics{grid-template-columns:1fr 1fr}.relation-chips{gap:6px}.note-actions{align-items:flex-start;flex-direction:column}.pagination{align-items:stretch;flex-direction:column;text-align:center}.pagination button{width:100%}
}
@media(max-width:460px){
  .vocab-metric-grid,.insight-metric-grid,.category-progress-grid,.study-result-metrics{grid-template-columns:1fr}.explorer-filters{grid-template-columns:1fr}.word-detail-actions,.study-rating-grid,.root-quiz>div:nth-child(2){grid-template-columns:1fr}.word-detail-hero h2{font-size:50px}.vocab-batch-bar{grid-template-columns:1fr}.vocab-batch-bar strong{grid-column:auto}
}

.vocab-ring{position:relative}