@font-face{font-family:Andika;font-style:normal;font-display:swap;font-weight:400;src:url(/assets/andika-cyrillic-ext-400-normal-VNDy5CZS.woff2) format("woff2"),url(/assets/andika-cyrillic-ext-400-normal-BJwze9_g.woff) format("woff");unicode-range:U+0460-052F,U+1C80-1C8A,U+20B4,U+2DE0-2DFF,U+A640-A69F,U+FE2E-FE2F}@font-face{font-family:Andika;font-style:normal;font-display:swap;font-weight:400;src:url(/assets/andika-cyrillic-400-normal-DYbdP60f.woff2) format("woff2"),url(/assets/andika-cyrillic-400-normal-CIdpN1kB.woff) format("woff");unicode-range:U+0301,U+0400-045F,U+0490-0491,U+04B0-04B1,U+2116}@font-face{font-family:Andika;font-style:normal;font-display:swap;font-weight:400;src:url(/assets/andika-vietnamese-400-normal-afg23LQ3.woff2) format("woff2"),url(/assets/andika-vietnamese-400-normal-Bw99zChb.woff) format("woff");unicode-range:U+0102-0103,U+0110-0111,U+0128-0129,U+0168-0169,U+01A0-01A1,U+01AF-01B0,U+0300-0301,U+0303-0304,U+0308-0309,U+0323,U+0329,U+1EA0-1EF9,U+20AB}@font-face{font-family:Andika;font-style:normal;font-display:swap;font-weight:400;src:url(/assets/andika-latin-ext-400-normal-D580Nkki.woff2) format("woff2"),url(/assets/andika-latin-ext-400-normal-NXfvB_tZ.woff) format("woff");unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}@font-face{font-family:Andika;font-style:normal;font-display:swap;font-weight:400;src:url(/assets/andika-latin-400-normal-BTFTIZb-.woff2) format("woff2"),url(/assets/andika-latin-400-normal-BK42By1L.woff) format("woff");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}@font-face{font-family:Andika;font-style:normal;font-display:swap;font-weight:700;src:url(/assets/andika-cyrillic-ext-700-normal-DvCsrHON.woff2) format("woff2"),url(/assets/andika-cyrillic-ext-700-normal-BdIUMeTx.woff) format("woff");unicode-range:U+0460-052F,U+1C80-1C8A,U+20B4,U+2DE0-2DFF,U+A640-A69F,U+FE2E-FE2F}@font-face{font-family:Andika;font-style:normal;font-display:swap;font-weight:700;src:url(/assets/andika-cyrillic-700-normal-D404ywHU.woff2) format("woff2"),url(/assets/andika-cyrillic-700-normal-Bzg0mZT8.woff) format("woff");unicode-range:U+0301,U+0400-045F,U+0490-0491,U+04B0-04B1,U+2116}@font-face{font-family:Andika;font-style:normal;font-display:swap;font-weight:700;src:url(/assets/andika-vietnamese-700-normal-CS3rZngu.woff2) format("woff2"),url(/assets/andika-vietnamese-700-normal-CZOGxJjV.woff) format("woff");unicode-range:U+0102-0103,U+0110-0111,U+0128-0129,U+0168-0169,U+01A0-01A1,U+01AF-01B0,U+0300-0301,U+0303-0304,U+0308-0309,U+0323,U+0329,U+1EA0-1EF9,U+20AB}@font-face{font-family:Andika;font-style:normal;font-display:swap;font-weight:700;src:url(/assets/andika-latin-ext-700-normal-Ch3SGZaH.woff2) format("woff2"),url(/assets/andika-latin-ext-700-normal-DBt0PRsd.woff) format("woff");unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}@font-face{font-family:Andika;font-style:normal;font-display:swap;font-weight:700;src:url(/assets/andika-latin-700-normal-Dk95f5lc.woff2) format("woff2"),url(/assets/andika-latin-700-normal-CAUSQC6x.woff) format("woff");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}:root{--font-ui: "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;--font-textbook: "Andika", "Trebuchet MS", sans-serif;font-family:var(--font-ui);color:#102a43;background:#f5f8fb;font-synthesis:none;--ink: #102a43;--muted: #627d98;--blue: #1464d2;--blue-dark: #0b448f;--line: #d9e2ec;--cream: #fffdf7}*{box-sizing:border-box}body{margin:0;min-width:320px;min-height:100vh}.textbook-english{font-family:var(--font-textbook)}button{font:inherit;color:inherit;cursor:pointer}button:focus-visible,input:focus-visible{outline:4px solid rgba(20,100,210,.25);outline-offset:3px}.shell{width:min(1180px,calc(100% - 40px));margin:0 auto;padding:58px 0 140px}.brand-block{text-align:center;margin:20px 0 46px}.eyebrow,.section-kicker{color:var(--blue);font-weight:800;letter-spacing:.12em}.brand-block h1{margin:12px 0 8px;font-size:clamp(42px,6vw,72px);letter-spacing:-.04em}.brand-block p{margin:0;color:var(--muted);font-size:clamp(18px,2.3vw,26px)}.recent-panel{display:flex;align-items:center;justify-content:space-between;gap:24px;max-width:800px;margin:0 auto 52px;padding:24px 28px;background:#eaf3ff;border:1px solid #b9d5f6;border-radius:20px}.recent-panel div{display:grid;gap:6px}.recent-panel strong{font-size:22px}.recent-panel small{color:var(--muted);font-size:16px}.primary{border:0;border-radius:14px;color:#fff;background:var(--blue);font-weight:800;padding:17px 32px;box-shadow:0 8px 20px #1464d233}.primary:hover{background:var(--blue-dark)}.primary:disabled{background:#9fb3c8;box-shadow:none;cursor:not-allowed}.primary.compact{padding:13px 22px;white-space:nowrap}.step-section{margin:32px 0}.step-heading{display:flex;align-items:center;gap:12px;margin-bottom:18px}.step-heading>span{display:grid;place-items:center;width:38px;height:38px;border-radius:50%;color:#fff;background:var(--ink);font-weight:800}.step-heading h2{margin:0;font-size:24px}.grade-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.grade-card,.unit-card{border:1px solid var(--line);background:#fff;border-radius:20px;transition:transform .18s,border-color .18s,box-shadow .18s}.grade-card{min-height:150px;display:flex;flex-direction:column;align-items:center;justify-content:center}.grade-card b{font-size:48px;line-height:1}.grade-card span{margin-top:10px;color:var(--muted);font-weight:700}.grade-card:hover,.grade-card.active,.unit-card:hover{transform:translateY(-3px);border-color:#69a7eb;box-shadow:0 12px 30px #102a431a}.grade-card.active{background:#eff6ff}.unit-section{animation:rise .3s ease both}.unit-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}.unit-card{min-height:210px;text-align:left;padding:28px;display:grid;align-content:start}.unit-number{color:var(--blue);font-weight:800;text-transform:uppercase}.unit-card strong{margin-top:12px;font-size:28px}.unit-card small{color:var(--muted);font-size:17px;margin-top:8px}.unit-action{margin-top:30px;color:var(--blue);font-weight:800}.back-link{border:0;background:transparent;padding:8px 0;color:var(--muted);font-weight:700}.setup-header{display:flex;justify-content:space-between;align-items:flex-end;gap:24px;margin:30px 0}.setup-header h1{margin:8px 0 0;font-size:44px}.selection-count{background:#eaf3ff;border-radius:14px;padding:14px 18px;font-size:18px}.selection-count b{color:var(--blue);font-size:28px}.panel{border:1px solid var(--line);background:#fff;border-radius:24px;padding:28px;margin:24px 0}.panel-heading{display:flex;justify-content:space-between;gap:20px;align-items:center;margin-bottom:22px}.panel-heading>div:first-child{display:flex;align-items:center;gap:12px}.panel-heading h2{margin:0;font-size:24px}.step-chip{color:var(--blue);background:#eaf3ff;border-radius:999px;padding:8px 12px;font-weight:800}.text-actions{display:flex;gap:8px}.text-actions button{border:0;background:#eef2f6;border-radius:10px;padding:9px 15px;font-weight:700}.word-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.word-row{min-height:76px;display:flex;align-items:center;gap:12px;padding:12px 14px;border:1px solid var(--line);border-radius:14px;cursor:pointer}.word-row input{position:absolute;opacity:0;pointer-events:none}.checkmark{display:grid;place-items:center;flex:0 0 26px;height:26px;border:2px solid #9fb3c8;border-radius:8px;color:transparent}.word-row.selected{border-color:#69a7eb;background:#f2f7ff}.word-row.selected .checkmark{color:#fff;background:var(--blue);border-color:var(--blue)}.word-row>span:last-child{display:grid;min-width:0}.word-row strong{font-family:var(--font-textbook);font-size:18px;font-weight:700;overflow-wrap:anywhere}.word-row small{margin-top:3px;color:var(--muted);line-height:1.35}.mode-grid{display:grid;grid-template-columns:2fr repeat(3,1fr);gap:12px}.mode-card{border:1px solid var(--line);border-radius:16px;background:#f9fbfd;text-align:left;padding:18px;min-height:120px;display:grid;align-content:start;gap:9px}.mode-card strong{font-size:18px}.mode-card span{color:var(--muted);line-height:1.5}.mode-card.active{color:#0b448f;border:2px solid var(--blue);background:#eaf3ff;padding:17px}.setting-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;margin-top:28px}.setting{display:grid;gap:10px}.segment{display:flex;padding:4px;gap:4px;border-radius:12px;background:#edf2f7}.segment button{flex:1;border:0;border-radius:9px;background:transparent;padding:10px 8px;font-weight:700}.segment button.active{color:var(--blue-dark);background:#fff;box-shadow:0 2px 8px #102a431f}.theme-setting{grid-column:1 / -1}.theme-picker{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}.theme-choice{min-width:0;display:grid;grid-template-columns:82px minmax(0,1fr);align-items:center;gap:12px;padding:10px;border:1px solid var(--line);border-radius:14px;color:var(--ink);background:#06182c7a;text-align:left}.theme-choice.active{border-color:#2697ff;background:#2697ff24;box-shadow:0 0 0 1px #2697ff2e}.theme-choice>span:last-child{min-width:0;display:grid;gap:3px}.theme-choice b{font-size:16px}.theme-choice small{color:var(--muted);font-size:13px}.theme-swatch{height:52px;display:grid;place-items:center;border:1px solid rgba(28,72,98,.24);border-radius:9px;font-family:var(--font-textbook);font-size:25px;font-weight:700}.theme-swatch-deep-navy{color:#f7fbff;border-color:#285783;background:linear-gradient(140deg,#041326,#082441)}.theme-swatch-warm-ivory{color:#172635;background:linear-gradient(140deg,#fbf7ed,#eee6d5)}.theme-swatch-daylight-blue{color:#0c2a3a;background:linear-gradient(140deg,#f1f9fd,#dbeaf3)}.theme-swatch-soft-mint{color:#18332b;background:linear-gradient(140deg,#f4f8f1,#dfeae2)}.setup-start{display:flex;align-items:center;justify-content:space-between;gap:24px;margin-top:30px;padding:24px;color:#fff;background:#102a43f5;border:1px solid #326c9f;border-radius:18px}.setup-start-copy{min-width:0;display:flex;align-items:center;gap:14px}.setup-start .step-chip{flex:0 0 auto;white-space:nowrap}.setup-start-copy>div{min-width:0;display:grid;gap:5px}.setup-start-copy b{font-size:20px}.setup-start-copy span:not(.step-chip){color:#cbd8e6;font-size:14px;line-height:1.45}.setup-start .primary{flex:0 0 auto}.preparing-screen,.complete-screen{min-height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:32px}.preparing-screen h1,.complete-screen h1{font-size:clamp(36px,5vw,60px);margin:24px 0 10px}.preparing-screen p,.complete-screen p{color:var(--muted);font-size:19px;max-width:680px;line-height:1.6}.loader-ring{--progress: 0deg;width:160px;height:160px;border-radius:50%;display:grid;place-items:center;background:conic-gradient(var(--blue) var(--progress),#d9e2ec 0);position:relative}.loader-ring:after{content:"";position:absolute;inset:13px;background:#f5f8fb;border-radius:50%}.loader-ring span{position:relative;z-index:1;font-size:42px;font-weight:900}.loader-ring small{font-size:22px;color:var(--muted)}.prepare-error{display:grid;gap:18px;margin-top:20px}.prepare-error>div{display:flex;gap:10px}.prepare-error button:not(.primary){border:1px solid var(--line);border-radius:14px;background:#fff;padding:14px 24px;font-weight:800}.classroom{min-height:100vh;color:#f7fbff;background:#102a43;display:grid;grid-template-rows:auto 1fr auto;overflow:hidden}.classroom.phase-recall{background:#2b2345}.classroom-top{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;padding:22px 34px}.classroom-top button{justify-self:start;border:0;background:transparent;color:#cbd8e6;padding:12px;font-weight:700}.phase-pill{display:flex;gap:12px;align-items:center;padding:12px 18px;border-radius:999px;background:#ffffff1a}.phase-pill span{color:#cbd8e6}.progress{justify-self:end;font-size:22px;color:#cbd8e6}.progress b{color:#fff;font-size:34px}.word-stage{min-height:0;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:24px 5vw;position:relative}.main-word{margin:0;max-width:100%;font-size:clamp(64px,9vw,128px);line-height:1.05;overflow-wrap:anywhere;text-wrap:balance}.meaning{margin:30px 0 0;font-size:clamp(30px,4vw,56px);color:#d9e8f5;line-height:1.35;text-wrap:balance}.stage-status{margin-top:38px;padding:10px 18px;border-radius:999px;color:#a9c7e3;background:#ffffff12;font-size:clamp(18px,2vw,26px)}.stage-status.speaking:before{content:"";display:inline-block;width:10px;height:10px;margin-right:10px;border-radius:50%;background:#55d98b;animation:pulse 1s infinite}.recall-prompt{margin-bottom:30px}.countdown{display:grid;place-items:center;width:110px;height:110px;margin:0 auto;border:5px solid #b9a8ef;border-radius:50%;font-size:52px;font-weight:900}.recall-prompt p{font-size:28px;color:#d9d0f5}.transition-card span{color:#9fb3c8;font-size:24px}.transition-card h1{margin:16px 0;font-size:clamp(58px,8vw,110px)}.transition-card p{font-size:32px;color:#cbd8e6}.error-card{position:absolute;bottom:20px;display:grid;gap:8px;padding:20px 24px;border-radius:16px;background:#742a2a}.error-card span{color:#fed7d7}.error-card div{display:flex;gap:8px;justify-content:center;margin-top:8px}.error-card button{border:1px solid rgba(255,255,255,.4);background:#fff;border-radius:10px;padding:10px 16px;font-weight:800}.playback-controls{display:flex;justify-content:center;align-items:center;gap:clamp(8px,2vw,24px);padding:20px 28px 30px}.playback-controls button{min-width:112px;min-height:74px;display:grid;place-items:center;gap:4px;border:1px solid rgba(255,255,255,.18);color:#fff;background:#ffffff14;border-radius:16px;font-weight:700}.playback-controls button span{font-size:27px;line-height:1}.playback-controls .play-main{min-width:138px;min-height:88px;background:#fff;color:var(--ink)}.complete-mark{display:grid;place-items:center;width:120px;height:120px;color:#fff;background:#2f855a;border-radius:50%;font-size:62px;font-weight:900;box-shadow:0 18px 40px #2f855a33}.complete-summary{display:flex;align-items:center;gap:10px;margin:26px 0;padding:18px 24px;border-radius:16px;background:#fff;border:1px solid var(--line)}.complete-summary b{font-size:28px;color:var(--blue)}.complete-summary i{width:1px;height:34px;background:var(--line);margin:0 10px}.complete-actions{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;width:min(480px,100%)}.complete-actions button{border:1px solid var(--line);background:#fff;border-radius:14px;padding:15px 20px;font-weight:800}.complete-actions .primary{background:var(--blue);color:#fff;border-color:var(--blue)}@keyframes rise{0%{opacity:0;transform:translateY(12px)}}@keyframes pulse{50%{transform:scale(1.5);opacity:.5}}@media(max-width:820px){.shell{width:min(100% - 24px,700px);padding-top:28px}.grade-grid{grid-template-columns:repeat(2,1fr)}.unit-grid,.setting-grid{grid-template-columns:1fr}.theme-picker,.word-grid,.mode-grid{grid-template-columns:repeat(2,1fr)}.setup-header{align-items:flex-start;flex-direction:column}.classroom-top{grid-template-columns:1fr 1fr;padding:12px 14px}.phase-pill{grid-column:1 / -1;grid-row:2;justify-self:center;margin-top:6px}.playback-controls{padding:12px;gap:6px}.playback-controls button,.playback-controls .play-main{min-width:0;flex:1;min-height:66px;font-size:13px}}@media(max-width:520px){.recent-panel{align-items:stretch;flex-direction:column}.word-grid,.mode-grid{grid-template-columns:1fr}.panel{padding:18px}.panel-heading{align-items:flex-start}.panel-heading>div:first-child{align-items:flex-start;flex-direction:column}.setup-start{align-items:stretch;flex-direction:column;padding:18px}.setup-start-copy{align-items:flex-start}.setup-start .primary{width:100%}.theme-picker{grid-template-columns:1fr}.playback-controls button:nth-child(5){display:none}}@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}:root{color:#f7fbff;background:#06182c;--ink: #f7fbff;--muted: #a9bfd9;--blue: #2697ff;--blue-dark: #1778d1;--line: #285783;--surface: #0b2542}body{color:var(--ink);background:radial-gradient(circle at 84% 12%,rgba(28,118,209,.22),transparent 34%),linear-gradient(135deg,#06182c,#08213d 72%,#0b3159)}.shell{min-height:100vh}.brand-block{margin-top:8px}.brand-block h1{color:#fff;text-shadow:0 12px 38px rgba(38,151,255,.14)}.brand-block p{color:var(--muted)}.eyebrow,.section-kicker,.unit-number,.unit-action{color:#63b5ff}.recent-panel,.grade-card,.unit-card,.panel,.complete-summary,.complete-actions button{color:#f7fbff;background:#0b2542db;border-color:var(--line);box-shadow:inset 0 1px #ffffff08}.recent-panel{background:#123a65b8}.grade-card span,.unit-card small,.mode-card span,.word-row small{color:var(--muted)}.grade-card:hover,.grade-card.active,.unit-card:hover{border-color:#2697ff;background:#0d3157;box-shadow:0 0 0 1px #2697ff2e,0 18px 45px #00000038}.step-heading>span,.step-chip{color:#dff1ff;background:#0f4f89}.back-link{color:var(--muted)}.selection-count,.text-actions button{color:#dff1ff;background:#10375f}.selection-count b{color:#4aa9ff}.word-row{background:#06182c7a;border-color:#234b70}.word-row.selected{color:#fff;border-color:#2697ff;background:#2697ff24}.mode-card{color:#eef7ff;border-color:#285783;background:#091f38}.mode-card.active{color:#fff;border-color:#2697ff;background:#0d3964}.segment{background:#06182c;border:1px solid #244b70}.segment button{color:var(--muted)}.segment button.active{color:#fff;background:#166fc1;box-shadow:0 5px 16px #0003}.setup-start{border-color:#326c9f;background:#051425f0}.setup-start-copy span:not(.step-chip){color:var(--muted)}.primary{background:linear-gradient(180deg,#2ca0ff,#1c82e5);box-shadow:0 8px 26px #2697ff40}.primary:hover{background:#2591ec}.preparing-screen,.complete-screen{color:#f7fbff;background:transparent}.preparing-screen p,.complete-screen p{color:var(--muted)}.loader-ring{background:conic-gradient(var(--blue) var(--progress),#173858 0);box-shadow:0 0 34px #2697ff2e}.loader-ring:after{background:#071c33}.loader-ring small{color:var(--muted)}.prepare-error button:not(.primary){color:#fff;border-color:var(--line);background:var(--surface)}.classroom{min-height:100svh;color:#f7fbff;background:radial-gradient(circle at 74% 42%,rgba(31,130,220,.15),transparent 26%),linear-gradient(145deg,#041326,#071d35 56%,#082441);border:1px solid #1e5b91}.classroom.phase-recall{background:radial-gradient(circle at 74% 42%,rgba(38,151,255,.14),transparent 26%),linear-gradient(145deg,#06152a,#0a2340)}.classroom-top{min-height:104px;border-bottom:1px solid rgba(66,133,190,.54);padding:18px 3vw}.classroom-brand{display:grid;gap:4px;justify-self:start}.classroom-brand strong{font-size:clamp(18px,2vw,28px);letter-spacing:.02em}.classroom-brand button{justify-self:start;padding:4px 0;font-size:13px}.lesson-context{display:grid;gap:6px;text-align:center}.lesson-context b{font-size:clamp(17px,1.8vw,24px)}.lesson-context span{color:var(--muted)}.word-stage{padding:4px 3vw 2px}.word-layout{width:min(1840px,100%);display:grid;grid-template-columns:minmax(0,1fr) clamp(180px,17vw,280px);gap:clamp(18px,2.4vw,46px);align-items:center}.word-copy{min-width:0;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:0}.word-writing-grid{position:relative;width:100%;height:clamp(270px,35vh,410px);margin-bottom:clamp(28px,3.4vh,44px);display:grid;place-items:center}.main-word,.recall-meaning{margin:0;max-width:100%;color:#fff;font-family:var(--font-textbook);font-weight:700;letter-spacing:-.015em;line-height:1.06;text-shadow:0 10px 32px rgba(0,0,0,.28);overflow-wrap:normal;word-break:normal;text-wrap:balance}.main-word{padding-bottom:.16em;transform:none}.main-word.word-tiny{font-size:clamp(170px,17vw,330px)}.main-word.word-short{font-size:clamp(138px,12.5vw,242px)}.main-word.word-medium{font-size:clamp(104px,9.5vw,184px)}.main-word.word-long{font-size:clamp(72px,6.6vw,128px);line-height:1.02}.main-word.word-phrase.word-medium{font-size:clamp(82px,7.3vw,142px);line-height:1.08}.main-word.word-phrase.word-long{font-size:clamp(56px,4.8vw,96px);line-height:1.08}.recall-meaning{font-family:var(--font-ui);font-size:clamp(82px,7vw,138px);letter-spacing:0;line-height:1.14}.phonetic{margin:0;color:#b9d8f5;font-family:var(--font-textbook);font-size:clamp(48px,4.4vw,84px);font-weight:400;line-height:1.2;letter-spacing:0;text-wrap:balance}.meaning{margin:28px 0 0;color:#f5f9fd;font-size:clamp(48px,4vw,76px);line-height:1.25;text-wrap:balance}.recall-hint{margin:32px 0 0;color:var(--muted);font-size:clamp(22px,2vw,32px);line-height:1.4}.pulse-ring{width:clamp(150px,14vw,230px);aspect-ratio:1;justify-self:center;display:grid;place-items:center;align-content:center;border:clamp(13px,1.5vw,22px) solid rgba(38,151,255,.25);border-top-color:#2697ff;border-right-color:#2697ff;border-radius:50%;box-shadow:0 0 42px #2697ff33,inset 0 0 42px #2697ff0f;transform:rotate(-14deg)}.pulse-ring span,.pulse-ring small{transform:rotate(14deg)}.pulse-ring span{font-size:clamp(54px,6vw,94px);font-weight:900;line-height:.95;font-variant-numeric:tabular-nums}.pulse-ring small{margin-top:12px;color:var(--muted);font-size:16px}.pulse-ring.is-speaking{animation:ring-pulse 1.2s ease-in-out infinite}.playback-sidecar{min-width:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:clamp(18px,2.4vh,30px)}.playback-meta{width:100%;display:grid;justify-items:center;gap:10px}.repeat-progress{color:#d7eaff;font-size:clamp(16px,1.25vw,21px);font-weight:750;font-variant-numeric:tabular-nums}.classroom-speed{width:min(100%,230px);display:grid;grid-template-columns:repeat(3,1fr);gap:4px;padding:4px;border:1px solid #285783;border-radius:12px;background:#041326b8}.classroom-speed button{min-width:0;padding:8px 4px;border:0;border-radius:8px;color:var(--muted);background:transparent;font-size:clamp(12px,1vw,15px);font-weight:750}.classroom-speed button.active{color:#fff;background:#166fc1;box-shadow:0 4px 12px #0003}.sound-wave{width:100%;height:58px;margin:0;display:flex;align-items:center;justify-content:center;gap:clamp(3px,.34vw,6px)}.sound-wave i{width:clamp(4px,.5vw,8px);height:var(--bar);max-height:64px;border-radius:999px;background:#2697ff;opacity:.72;transform:scaleY(.36);transform-origin:center}.is-speaking+.sound-wave i,.classroom:has(.stage-status.speaking) .sound-wave i{animation:wave 1.1s ease-in-out infinite alternate;animation-delay:calc(var(--bar) * -5ms)}.stage-status{display:inline-flex;align-items:center;justify-content:center;flex:0 0 auto;margin:0;padding:11px 20px;color:#d7eaff;background:#2697ff21;border:1px solid rgba(77,171,255,.38);font-size:clamp(18px,1.4vw,24px);line-height:1.15;white-space:nowrap}.stage-status.paused{color:#ffe5a8;border-color:#ffc4487a;background:#97640c33}.playback-controls{padding:12px 3vw 10px}.playback-controls button{min-width:128px;min-height:78px;border-color:#285783;background:#0a2745cc}.playback-controls button:hover{border-color:#2697ff;background:#0e365e}.playback-controls button svg{width:28px;height:28px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}.playback-controls .play-main{min-width:170px;color:#fff;border-color:#42a8ff;background:linear-gradient(180deg,#2ca0ff,#1c82e5)}.keyboard-hint{padding:2px 20px 18px;color:var(--muted);text-align:center;font-size:14px}.complete-mark{background:#1d8bea;box-shadow:0 18px 46px #2697ff47}.complete-summary b{color:#5db4ff}@keyframes ring-pulse{50%{box-shadow:0 0 62px #2697ff6b,inset 0 0 42px #2697ff1f;transform:rotate(-14deg) scale(1.025)}}@keyframes wave{to{transform:scaleY(1);opacity:1}}@media(max-width:820px){.classroom-top{min-height:0}.lesson-context{grid-column:1 / -1;grid-row:2;margin-top:8px}.word-stage{padding-inline:14px}.word-layout{grid-template-columns:minmax(0,1fr) clamp(104px,23vw,150px);gap:10px}.word-copy{padding:0}.word-writing-grid{height:clamp(190px,29vh,280px);margin-bottom:24px}.main-word.word-tiny{font-size:clamp(104px,26vw,170px)}.main-word.word-short{font-size:clamp(84px,20vw,132px)}.main-word.word-medium{font-size:clamp(62px,15vw,98px)}.main-word.word-long{font-size:clamp(42px,10vw,66px)}.main-word.word-phrase.word-medium{font-size:clamp(48px,10vw,76px)}.main-word.word-phrase.word-long{font-size:clamp(36px,7.5vw,54px)}.recall-meaning{font-size:clamp(54px,12vw,86px)}.phonetic{font-size:clamp(34px,8vw,50px)}.meaning{margin-top:18px;font-size:clamp(34px,8vw,50px)}.stage-status{padding:8px 10px;font-size:clamp(13px,3vw,17px)}.pulse-ring{width:clamp(92px,21vw,132px);border-width:9px}.pulse-ring span{font-size:clamp(38px,10vw,58px)}.pulse-ring small{margin-top:6px;font-size:12px}.repeat-progress{font-size:13px}.classroom-speed{width:100%}.classroom-speed button{padding:7px 2px;font-size:11px}.playback-sidecar{gap:14px}.sound-wave{height:40px}.playback-controls{flex-wrap:nowrap}.keyboard-hint{display:none}}@media(min-width:821px)and (max-height:820px){.classroom-top{min-height:80px;padding-block:10px}.classroom-brand strong{font-size:clamp(18px,1.8vw,24px)}.lesson-context b{font-size:clamp(17px,1.6vw,22px)}.word-stage{padding-block:2px 0}.word-copy{padding-block:0}.word-writing-grid{height:clamp(250px,35vh,300px);margin-bottom:28px}.phonetic{font-size:clamp(50px,4.6vw,68px)}.meaning{margin-top:18px;font-size:clamp(50px,4.2vw,64px)}.pulse-ring{width:clamp(150px,14vw,205px);border-width:clamp(11px,1.2vw,16px)}.pulse-ring span{font-size:clamp(58px,7vw,96px)}.sound-wave{height:44px}.sound-wave i{max-height:42px}.playback-controls{padding-block:5px}.playback-controls button,.playback-controls .play-main{min-height:66px}.keyboard-hint{padding:0 20px 6px;font-size:12px}}@media(max-width:520px){.classroom-top{width:100%;min-width:0;grid-template-columns:minmax(0,1fr) auto;column-gap:10px;padding-inline:12px}.classroom-brand strong{font-size:16px}.classroom-brand button{display:none}.lesson-context{width:100%;min-width:0;padding-inline:4px}.lesson-context b{font-size:15px;overflow-wrap:anywhere}.lesson-context span{font-size:12px;overflow-wrap:anywhere}.progress{font-size:14px}.progress b{font-size:24px}.word-stage{padding-inline:8px}.word-layout{grid-template-columns:minmax(0,1fr) 92px;gap:6px}.word-writing-grid{height:clamp(170px,25vh,220px);margin-bottom:18px}.main-word.word-tiny{font-size:clamp(92px,27vw,122px)}.main-word.word-short{font-size:clamp(70px,20vw,92px)}.main-word.word-medium{font-size:clamp(52px,15vw,68px)}.main-word.word-long{font-size:clamp(36px,10vw,48px)}.main-word.word-phrase.word-medium{font-size:clamp(36px,10vw,45px)}.main-word.word-phrase.word-long{font-size:clamp(29px,7.5vw,36px)}.recall-meaning{font-size:clamp(48px,15vw,68px)}.phonetic{font-size:31px}.meaning{margin-top:13px;font-size:34px}.stage-status{padding:7px 5px;font-size:12px}.pulse-ring{width:84px;border-width:8px}.pulse-ring span{font-size:38px}.playback-meta{gap:6px}.classroom-speed button{padding-inline:1px;font-size:10px}.playback-sidecar{gap:10px}.sound-wave i:nth-child(-n+5),.sound-wave i:nth-last-child(-n+5){display:none}.playback-controls{width:100%;min-width:0;padding-inline:8px}.playback-controls button,.playback-controls .play-main{min-width:0;min-height:68px;padding:7px 3px}.playback-controls button svg{width:24px;height:24px}}.app-theme.theme-deep-navy{--class-bg-start: #041326;--class-bg-end: #082441;--class-glow: rgba(31,130,220,.18);--class-ink: #f7fbff;--class-muted: #a9bfd9;--class-accent: #2697ff;--class-accent-soft: #123b60;--class-line: #285783;--class-surface: #0b2542;--class-phonetic: #b9d8f5}.app-theme.theme-warm-ivory,.classroom.theme-warm-ivory{--class-bg-start: #fbf7ed;--class-bg-end: #eee6d5;--class-glow: #dceaf4;--class-ink: #172635;--class-muted: #50687b;--class-accent: #1c70ad;--class-accent-soft: #d8ecf7;--class-line: #9fbfd2;--class-surface: #fffdf7;--class-phonetic: #2d6685}.app-theme.theme-daylight-blue,.classroom.theme-daylight-blue{--class-bg-start: #f1f9fd;--class-bg-end: #dbeaf3;--class-glow: #cce7f4;--class-ink: #0c2a3a;--class-muted: #456779;--class-accent: #007bb7;--class-accent-soft: #d5edf7;--class-line: #91bfd4;--class-surface: #fbfeff;--class-phonetic: #2f647b}.app-theme.theme-soft-mint,.classroom.theme-soft-mint{--class-bg-start: #f4f8f1;--class-bg-end: #dfeae2;--class-glow: #d2e9df;--class-ink: #18332b;--class-muted: #526d63;--class-accent: #187b70;--class-accent-soft: #d5ece7;--class-line: #9fc5ba;--class-surface: #fbfdf9;--class-phonetic: #3d7065}.classroom.theme-warm-ivory,.classroom.theme-daylight-blue,.classroom.theme-soft-mint{color:var(--class-ink);background:radial-gradient(circle at 73% 40%,var(--class-glow) 0,transparent 28%),linear-gradient(140deg,var(--class-bg-start),var(--class-bg-end));border-color:var(--class-line)}.classroom.theme-warm-ivory .classroom-top,.classroom.theme-daylight-blue .classroom-top,.classroom.theme-soft-mint .classroom-top{border-bottom-color:var(--class-line)}.classroom.theme-warm-ivory :is(.classroom-brand strong,.lesson-context b,.progress b,.main-word,.recall-meaning,.meaning),.classroom.theme-daylight-blue :is(.classroom-brand strong,.lesson-context b,.progress b,.main-word,.recall-meaning,.meaning),.classroom.theme-soft-mint :is(.classroom-brand strong,.lesson-context b,.progress b,.main-word,.recall-meaning,.meaning){color:var(--class-ink);text-shadow:none}.classroom.theme-warm-ivory :is(.classroom-brand button,.lesson-context span,.progress,.keyboard-hint),.classroom.theme-daylight-blue :is(.classroom-brand button,.lesson-context span,.progress,.keyboard-hint),.classroom.theme-soft-mint :is(.classroom-brand button,.lesson-context span,.progress,.keyboard-hint){color:var(--class-muted)}.classroom.theme-warm-ivory .phonetic,.classroom.theme-daylight-blue .phonetic,.classroom.theme-soft-mint .phonetic{color:var(--class-phonetic)}.classroom.theme-warm-ivory .stage-status,.classroom.theme-daylight-blue .stage-status,.classroom.theme-soft-mint .stage-status{color:var(--class-accent);border-color:var(--class-line);background:var(--class-accent-soft)}.classroom.theme-warm-ivory .stage-status.paused,.classroom.theme-daylight-blue .stage-status.paused,.classroom.theme-soft-mint .stage-status.paused{color:#805500;border-color:#d7b86a;background:#fff3cf}.classroom.theme-warm-ivory .pulse-ring,.classroom.theme-daylight-blue .pulse-ring,.classroom.theme-soft-mint .pulse-ring{border-color:var(--class-accent-soft);border-top-color:var(--class-accent);border-right-color:var(--class-accent);box-shadow:0 0 34px var(--class-glow),inset 0 0 28px #ffffff8c}.classroom.theme-warm-ivory :is(.pulse-ring span,.playback-controls button),.classroom.theme-daylight-blue :is(.pulse-ring span,.playback-controls button),.classroom.theme-soft-mint :is(.pulse-ring span,.playback-controls button){color:var(--class-ink)}.classroom.theme-warm-ivory :is(.pulse-ring small,.repeat-progress),.classroom.theme-daylight-blue :is(.pulse-ring small,.repeat-progress),.classroom.theme-soft-mint :is(.pulse-ring small,.repeat-progress){color:var(--class-muted)}.classroom.theme-warm-ivory .classroom-speed,.classroom.theme-daylight-blue .classroom-speed,.classroom.theme-soft-mint .classroom-speed{border-color:var(--class-line);background:#ffffff8a}.classroom.theme-warm-ivory .classroom-speed button,.classroom.theme-daylight-blue .classroom-speed button,.classroom.theme-soft-mint .classroom-speed button{color:var(--class-muted)}.classroom.theme-warm-ivory .classroom-speed button.active,.classroom.theme-daylight-blue .classroom-speed button.active,.classroom.theme-soft-mint .classroom-speed button.active{color:#fff;background:var(--class-accent);box-shadow:none}.classroom.theme-warm-ivory .sound-wave i,.classroom.theme-daylight-blue .sound-wave i,.classroom.theme-soft-mint .sound-wave i{background:var(--class-accent)}.classroom.theme-warm-ivory .playback-controls button,.classroom.theme-daylight-blue .playback-controls button,.classroom.theme-soft-mint .playback-controls button{border-color:var(--class-line);background:#ffffffb8}.classroom.theme-warm-ivory .playback-controls button:hover,.classroom.theme-daylight-blue .playback-controls button:hover,.classroom.theme-soft-mint .playback-controls button:hover{color:var(--class-ink);border-color:var(--class-accent);background:var(--class-surface)}.classroom.theme-warm-ivory .playback-controls .play-main,.classroom.theme-warm-ivory .playback-controls .play-main:hover,.classroom.theme-daylight-blue .playback-controls .play-main,.classroom.theme-daylight-blue .playback-controls .play-main:hover,.classroom.theme-soft-mint .playback-controls .play-main,.classroom.theme-soft-mint .playback-controls .play-main:hover{color:#fff;border-color:var(--class-accent);background:var(--class-accent)}.app-theme{min-height:100vh;color:var(--class-ink);background:radial-gradient(circle at 73% 40%,var(--class-glow) 0,transparent 28%),linear-gradient(140deg,var(--class-bg-start),var(--class-bg-end))}.app-theme :is(.home-shell,.setup-shell,.preparing-screen,.complete-screen){color:var(--class-ink);background:transparent}.app-theme :is(.brand-block h1,.setup-header h1,.panel-heading h2,.word-row strong,.mode-card strong,.recent-panel strong,.unit-card strong,.complete-screen h1,.preparing-screen h1){color:var(--class-ink);text-shadow:none}.app-theme :is(.brand-block p,.recent-panel small,.unit-card small,.mode-card span,.word-row small,.back-link,.complete-screen p,.preparing-screen p){color:var(--class-muted)}.app-theme :is(.eyebrow,.section-kicker,.unit-number,.unit-action,.selection-count b,.complete-summary b){color:var(--class-accent)}.app-theme :is(.recent-panel,.grade-card,.unit-card,.panel,.complete-summary,.complete-actions button,.word-row,.mode-card){color:var(--class-ink);border-color:var(--class-line);background:#ffffffb3;box-shadow:inset 0 1px #ffffff73}.app-theme :is(.grade-card:hover,.grade-card.active,.unit-card:hover,.word-row.selected,.mode-card.active){border-color:var(--class-accent);background:var(--class-accent-soft)}.app-theme :is(.selection-count,.text-actions button,.step-chip){color:var(--class-ink);background:var(--class-accent-soft)}.app-theme .segment{border-color:var(--class-line);background:#ffffff7a}.app-theme .segment button{color:var(--class-muted)}.app-theme .segment button.active{color:#fff;background:var(--class-accent);box-shadow:none}.app-theme .theme-choice{color:var(--class-ink);border-color:var(--class-line);background:#fff9}.app-theme .theme-choice.active{border-color:var(--class-accent);background:var(--class-accent-soft);box-shadow:0 0 0 1px color-mix(in srgb,var(--class-accent) 22%,transparent)}.app-theme .setup-start{color:var(--class-ink);border-color:var(--class-line);background:color-mix(in srgb,var(--class-surface) 94%,transparent)}.app-theme .setup-start-copy span:not(.step-chip){color:var(--class-muted)}.app-theme .primary{color:#fff;background:var(--class-accent);box-shadow:0 8px 24px color-mix(in srgb,var(--class-accent) 24%,transparent)}.app-theme .primary:hover{background:var(--class-accent);filter:brightness(.94)}.app-theme .loader-ring{background:conic-gradient(var(--class-accent) var(--progress),var(--class-accent-soft) 0);box-shadow:0 0 34px var(--class-glow)}.app-theme .loader-ring:after{background:var(--class-surface)}.app-theme .loader-ring small{color:var(--class-muted)}.app-theme .complete-mark{color:#fff;background:var(--class-accent);box-shadow:0 18px 46px color-mix(in srgb,var(--class-accent) 25%,transparent)}.app-theme .complete-actions button{color:var(--class-ink)}.app-theme .complete-actions .primary{color:#fff;border-color:var(--class-accent);background:var(--class-accent)}.app-theme .prepare-error button:not(.primary){color:var(--class-ink);border-color:var(--class-line);background:var(--class-surface)}.app-theme.theme-deep-navy :is(.recent-panel,.grade-card,.unit-card,.panel,.complete-summary,.complete-actions button,.word-row,.mode-card){color:var(--class-ink);border-color:var(--class-line);background:#0b2542db;box-shadow:inset 0 1px #ffffff08}.app-theme.theme-deep-navy :is(.grade-card:hover,.grade-card.active,.unit-card:hover,.word-row.selected,.mode-card.active){border-color:var(--class-accent);background:#2697ff24}.app-theme.theme-deep-navy :is(.selection-count,.text-actions button,.step-chip){color:#dff1ff;background:#10375f}.app-theme.theme-deep-navy .segment{border-color:#244b70;background:#06182c}.app-theme.theme-deep-navy .segment button.active{color:#fff;background:#166fc1}.app-theme.theme-deep-navy .theme-choice{color:var(--class-ink);border-color:var(--class-line);background:#06182c7a}.app-theme.theme-deep-navy .theme-choice.active{border-color:var(--class-accent);background:#2697ff24}.app-theme.theme-deep-navy .setup-start{color:#fff;border-color:#326c9f;background:#051425f0}.app-theme.theme-deep-navy .loader-ring:after{background:#071c33}