:root{--vf-ink:#1c302e;--vf-teal:#167564;--vf-muted:#687c77;--vf-line:#dce8e2;--vf-lilac:#ece7ff}
*{box-sizing:border-box}body.vocab-page{margin:0;background:#f4f6f3;color:var(--vf-ink);font-family:'Be Vietnam Pro',system-ui,sans-serif;font-size:14px;line-height:1.6}button,input{font:inherit}button,a,input{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:default;opacity:.55}[hidden]{display:none!important}a{color:inherit}.vf-page{max-width:1440px;margin:auto;padding:32px 40px 24px}button:focus-visible,a:focus-visible,input:focus-visible,[tabindex]:focus-visible{outline:3px solid #916cda;outline-offset:4px}.vf-skip{position:fixed;top:-80px;left:16px;z-index:100}.vf-skip:focus{top:8px;background:white;padding:10px}.vf-hero{position:relative;display:flex;justify-content:space-between;align-items:center;gap:20px;padding:30px 36px;border-radius:28px;background:#dff0e8;overflow:hidden;min-height:238px}.vf-back{text-decoration:none;color:var(--vf-teal);font-weight:600}.vf-eyebrow{font-size:11px;letter-spacing:.2em;margin:22px 0 8px;font-weight:700}.vf-hero h1{font-size:clamp(26px,3vw,42px);line-height:1.25;letter-spacing:-1.4px;margin:0}.vf-hero p:last-child{color:#476c60;margin-bottom:0}.vf-language{position:absolute;right:20px;top:16px;border:1px solid #ffffff;background:#ffffffa6;border-radius:20px;padding:5px 12px;font-size:11px;font-weight:700}.vf-hero-art{position:relative;flex:0 0 220px;height:180px;display:grid;place-items:center}.vf-art-card{display:flex;flex-direction:column;align-items:center;justify-content:center;transform:rotate(-12deg);background:#fff9e6;width:112px;height:142px;box-shadow:12px 10px 0 #b8d9cb,22px 18px 0 #cfe8df;border:2px solid white;border-radius:18px;font-size:44px;font-weight:700}.vf-art-card small{font-size:12px;font-weight:500}.vf-art-spark{position:absolute;right:16px;top:2px;color:#df9d34;font-size:45px}.vf-art-tag{position:absolute;bottom:0;right:0;border-radius:18px;background:var(--vf-ink);color:white;padding:5px 14px;font-size:10px;transform:rotate(6deg)}.vf-layout{display:grid;grid-template-columns:235px minmax(0,1fr);gap:28px;margin-top:28px}.vf-section-title{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px}.vf-section-title h2{margin:0;font-size:17px}.vf-section-title>span{font-size:12px;color:var(--vf-muted)}#vf-decks{display:grid;gap:9px}.vf-deck{width:100%;display:flex;align-items:center;gap:12px;text-align:left;border:1px solid transparent;background:white;border-radius:16px;padding:14px;transition:background .15s,transform .15s}.vf-deck[aria-pressed=true]{border-color:#74b29f;background:#e7f4ee}.vf-deck:hover{transform:translateY(-2px)}.vf-deck-icon{background:var(--deck-color,#eee8fc);width:38px;height:42px;border-radius:10px;display:grid;place-items:center;font-size:21px;flex:none}.vf-deck strong{display:block;font-size:13px}.vf-deck small{font-size:11px;color:var(--vf-muted)}.vf-notebook{display:block;margin-top:18px;font-size:12px;text-decoration:none;padding:14px;border:1px dashed #adcbc0;border-radius:14px}.vf-workspace{min-width:0}.vf-tabs{display:flex;gap:5px;padding:5px;background:#e8ece7;border-radius:14px;margin-bottom:16px}.vf-tabs button{flex:1;border:0;background:transparent;padding:11px 6px;border-radius:10px;color:var(--vf-muted);font-size:12px;font-weight:600;white-space:nowrap}.vf-tabs button[aria-selected=true]{background:white;color:var(--vf-ink);box-shadow:0 2px 8px #20382d0a}.vf-stage{background:#fff;border:1px solid var(--vf-line);border-radius:24px;padding:28px;min-height:490px}.vf-stage h2{font-size:24px;line-height:1.3;margin:0 0 10px}.vf-subtitle{color:var(--vf-muted);font-size:13px;margin:0 0 22px}.vf-topline{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:20px;font-size:12px;color:var(--vf-muted)}.vf-pill{padding:5px 12px;background:var(--vf-lilac);border-radius:20px;color:#69538f;white-space:nowrap}.vf-progress{width:100%;height:5px;appearance:none;border:0;border-radius:8px;overflow:hidden;display:block;margin-top:20px}.vf-progress::-webkit-progress-bar{background:#edf2ee}.vf-progress::-webkit-progress-value{background:#71b398}.vf-progress::-moz-progress-bar{background:#71b398}.vf-flip{width:100%;min-height:265px;border:1px solid #ded7f4;background:linear-gradient(130deg,#f4f0ff,#faf8ff);border-radius:22px;padding:30px 24px;display:flex;align-items:center;justify-content:center;flex-direction:column;gap:12px;color:var(--vf-ink);animation:vf-enter .22s ease}.vf-flip.is-back{background:#eef7f1;border-color:#d0e5d8}.vf-word{font-size:clamp(26px,3vw,40px);font-weight:700;overflow-wrap:anywhere;line-height:1.2}.vf-meaning{font-size:21px;line-height:1.5}.vf-ipa,.vf-hint{color:var(--vf-muted);font-size:12px}.vf-example{font-style:italic;color:#4d6c5e;max-width:480px;font-size:14px}.vf-actions{display:flex;justify-content:center;align-items:center;flex-wrap:wrap;gap:10px;margin-top:20px}.vf-btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;text-decoration:none;border:1px solid var(--vf-line);border-radius:12px;padding:11px 18px;background:white;color:var(--vf-ink);font-size:13px;font-weight:600}.vf-btn:hover{background:#f2f6f2}.vf-btn.primary{background:var(--vf-teal);border-color:var(--vf-teal);color:white}.vf-btn.soft{background:#f0eaff;border-color:#e5dbfa;color:#71538d}.vf-btn.small{padding:7px 12px;font-size:12px}.vf-help{font-size:12px;color:var(--vf-muted);text-align:center;margin:18px 0 0}.vf-alert{padding:12px 18px;margin-top:16px;background:#fff3db;border:1px solid #ead2a4;border-radius:12px;color:#684b22}.vf-game-intro{display:flex;flex-direction:column;align-items:center;text-align:center;padding:36px 14px}.vf-game-icon{font-size:40px;background:#fff1cb;width:100px;height:100px;display:grid;place-items:center;border-radius:30px;transform:rotate(-8deg);margin-bottom:25px}.vf-game-intro p{max-width:440px}.vf-match{display:grid;grid-template-columns:1fr 1fr;gap:16px}.vf-match-column{display:grid;gap:9px}.vf-pair{min-height:68px;border:1px solid var(--vf-line);border-radius:12px;background:#f8faf7;padding:12px;text-align:left;color:var(--vf-ink);font-size:12px;line-height:1.5}.vf-pair.selected{border-color:#9063d4;background:#f0e9ff}.vf-pair.matched{background:#e1f4e8;border-color:#75ba91;color:#326b48;opacity:.65}.vf-pair.wrong{background:#fff0ed;border-color:#dd8277}.vf-prompt{background:#f2effa;border-radius:20px;padding:28px;text-align:center;min-height:155px;display:flex;flex-direction:column;justify-content:center;gap:10px;margin-bottom:20px}.vf-prompt p{margin:0;font-size:21px;line-height:1.5}.vf-form{display:flex;gap:10px;align-items:end;flex-wrap:wrap}.vf-form label{display:flex;flex:1;flex-direction:column;gap:7px;font-size:12px;min-width:140px}.vf-form input{width:100%;border:1px solid #cad9d0;border-radius:12px;padding:13px 14px;background:#fff;color:var(--vf-ink);min-width:0}.vf-feedback{padding:15px 18px;border-radius:12px;margin-top:16px;background:#e7f4ec;color:#245c3b}.vf-feedback.wrong{background:#fff0ec;color:#954a3d}.vf-room-header{display:flex;justify-content:space-between;align-items:start;gap:16px}.vf-room-code{font-size:24px;letter-spacing:.12em;font-weight:700}.vf-invite{padding:16px;border:1px dashed #b7cfbf;border-radius:15px;background:#f5faf6;margin:18px 0}.vf-invite input{width:100%;border:0;background:transparent;color:var(--vf-muted);font-size:12px;margin:10px 0}.vf-player-list{list-style:none;padding:0;margin:18px 0;display:grid;gap:8px}.vf-player{display:flex;justify-content:space-between;gap:12px;padding:12px 15px;background:#f5f7f3;border-radius:12px;font-size:13px}.vf-player.is-me{background:#e6f2eb}.vf-player span:first-child{overflow-wrap:anywhere}.vf-player small{color:var(--vf-muted)}.vf-score{font-size:46px;font-weight:700;line-height:1.3;color:var(--vf-teal)}.vf-results{padding:0;list-style:none;max-height:280px;overflow:auto;display:grid;gap:8px}.vf-results li{border-bottom:1px solid var(--vf-line);padding:10px 0;font-size:12px}.vf-results strong{display:block;font-size:14px}.vf-footer{display:flex;justify-content:center;gap:12px;flex-wrap:wrap;color:var(--vf-muted);font-size:11px;margin-top:26px}.vf-divider{border:0;border-top:1px solid var(--vf-line);margin:26px 0}.vf-timer{font-size:20px;font-weight:700;color:var(--vf-teal);font-variant-numeric:tabular-nums}.vf-timer.urgent{color:#b74d44}@keyframes vf-enter{from{opacity:.5;transform:translateY(5px)}to{opacity:1;transform:translateY(0)}}
@media(min-width:1081px){body.vocab-page[data-study-navigation] .vf-page{padding-left:28px}}@media(max-width:1100px){.vf-page{padding:22px}.vf-layout{grid-template-columns:190px minmax(0,1fr);gap:18px}.vf-stage{padding:22px}.vf-hero-art{flex-basis:170px}.vf-tabs button{font-size:11px}}
@media(max-width:760px){.vf-page{padding:12px}.vf-hero{padding:22px;min-height:210px}.vf-hero-art{display:none}.vf-hero h1{max-width:280px;letter-spacing:-.8px}.vf-hero p:last-child{max-width:270px;font-size:13px}.vf-layout{grid-template-columns:minmax(0,1fr);gap:18px;margin-top:20px}#vf-decks{display:flex;overflow:auto;gap:8px;padding:3px 2px 8px}.vf-deck{width:190px;flex:0 0 190px;padding:12px}.vf-section-title{margin-bottom:8px}.vf-notebook{margin-top:6px;padding:9px 12px}.vf-stage{padding:18px;border-radius:20px;min-height:450px}.vf-tabs{gap:1px}.vf-tabs button{font-size:11px;padding:10px 3px}.vf-flip{min-height:250px;padding:24px 16px}.vf-meaning{font-size:18px}.vf-prompt{padding:22px 16px}.vf-prompt p{font-size:18px}.vf-match{gap:9px}.vf-pair{font-size:11px;padding:9px;min-height:86px}.vf-game-intro{padding:20px 2px}.vf-stage h2{font-size:22px}.vf-hero .vf-eyebrow{font-size:10px}}@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}