/* V13 — dual theme: dark / light. Loaded last so it can override legacy dark-only rules. */
:root{color-scheme:dark}
html[data-theme="light"]{color-scheme:light;--color-bg:#f3f7fb;--color-dark:#ffffff;--color-cyberBg:#f3f7fb;--color-cyberDark:#ffffff;--color-cyberDarkLighter:#edf2f8;--color-cyberCyan:#007f8f;--color-cyberPink:#c2185b;--color-cyberPurple:#6d28d9;--color-cyberGreen:#168a20;--color-gray-100:#172033;--color-gray-300:#334155;--color-gray-400:#64748b;--color-gray-500:#7a8798}
html[data-theme="dark"]{color-scheme:dark}

.theme-toggle-v13{display:inline-flex;align-items:center;justify-content:center;gap:.45rem;min-width:44px;height:44px;padding:0 .8rem;border-radius:999px;border:1px solid rgba(255,255,255,.12);background:rgba(255,255,255,.05);color:#dce8f7;cursor:pointer;transition:.2s ease;font-weight:800}
.theme-toggle-v13:hover{border-color:var(--color-cyberCyan);color:var(--color-cyberCyan)}
.theme-toggle-v13 .theme-label{font-size:.72rem;letter-spacing:.04em}
@media(max-width:640px){.theme-toggle-v13{width:42px;height:42px;padding:0}.theme-toggle-v13 .theme-label{display:none}}

html[data-theme="light"] body{background:#f3f7fb;color:#172033}
html[data-theme="light"] #starfield{opacity:.06!important}
html[data-theme="light"] .text-white{color:#111827!important}
html[data-theme="light"] .text-gray-100{color:#172033!important}
html[data-theme="light"] .text-gray-300{color:#334155!important}
html[data-theme="light"] .text-gray-400{color:#64748b!important}
html[data-theme="light"] .text-gray-500{color:#7a8798!important}
html[data-theme="light"] [class~="bg-white/5"]{background:rgba(15,23,42,.045)!important}
html[data-theme="light"] [class~="bg-white/10"]{background:rgba(15,23,42,.075)!important}
html[data-theme="light"] [class~="border-white/10"]{border-color:rgba(15,23,42,.13)!important}
html[data-theme="light"] [class~="border-white/20"]{border-color:rgba(15,23,42,.2)!important}
html[data-theme="light"] [class~="bg-black/70"]{background:rgba(15,23,42,.28)!important}
html[data-theme="light"] ::-webkit-scrollbar-track{background:#edf2f7}
html[data-theme="light"] ::-webkit-scrollbar-thumb{background:#c8d2df}
html[data-theme="light"] .cyber-card{background:linear-gradient(145deg,#ffffff,#f7f9fc)!important;border-color:#d7e0ea!important;box-shadow:0 8px 26px rgba(15,23,42,.06)}
html[data-theme="light"] .special-topbar{background:#fff;border-color:rgba(0,127,143,.25)}
html[data-theme="light"] .special-topbar button,
html[data-theme="light"] .special-options button,
html[data-theme="light"] .special-speak,
html[data-theme="light"] .record-btn,
html[data-theme="light"] .dict-play,
html[data-theme="light"] .dict-check,
html[data-theme="light"] .reading-actions button,
html[data-theme="light"] .special-tabs button,
html[data-theme="light"] .gallery-toolbar button{background:#f6f8fb;color:#172033;border-color:#cbd7e5}
html[data-theme="light"] .dictation-card input{background:#fff;color:#172033;border-color:#cbd5e1}
html[data-theme="light"] .special-intro,html[data-theme="light"] .special-hint{color:#58677a}
html[data-theme="light"] .glossary td{border-color:#dce3ec}
html[data-theme="light"] .video-dialogue-lines p{color:#172033}
html[data-theme="light"] .line-speak{color:#81204f;background:#fff1f7}

/* Olympiad native workspace */
html[data-theme="light"] .ol12{--c:#087f91;--p:#c2185b;--bg:#f5f8fc;--panel:#fff;--line:#d6e0ea;color:#172033}
html[data-theme="light"] .ol12-shell{background:linear-gradient(180deg,#fff,#f6f8fb);border-color:#d6e0ea}
html[data-theme="light"] .ol12-head{background:linear-gradient(105deg,rgba(8,127,145,.09),rgba(194,24,91,.06));border-color:#d6e0ea}
html[data-theme="light"] .ol12-head p,html[data-theme="light"] .ol12-feedback,html[data-theme="light"] .ol12-native-empty,html[data-theme="light"] .ol12-archive-card p{color:#5d6c80}
html[data-theme="light"] .ol12-tabs{background:#f1f5f9;border-color:#d6e0ea}
html[data-theme="light"] .ol12-tab,html[data-theme="light"] .ol12-toolbar button,html[data-theme="light"] .ol12-toolbar select{background:#fff;color:#172033;border-color:#cbd5e1}
html[data-theme="light"] .ol12-tab.active{background:#e8f7f9;border-color:#087f91}
html[data-theme="light"] .ol12-source,html[data-theme="light"] .ol12-questions,html[data-theme="light"] .ol12-card,html[data-theme="light"] .ol12-q,html[data-theme="light"] .ol12-column,html[data-theme="light"] .ol12-archive-card{background:#fff;border-color:#d6e0ea}
html[data-theme="light"] .ol12-instruction{background:#edf8fa;color:#294657}
html[data-theme="light"] .ol12-text{color:#1f2937}
html[data-theme="light"] .ol12-native-empty strong{color:#172033}
html[data-theme="light"] .ol12-drop,html[data-theme="light"] .ol12-input,html[data-theme="light"] .ol12-textarea{background:#f8fafc;color:#172033;border-color:#b9c8d8}
html[data-theme="light"] .ol12-drop.filled{background:#eef8fa;color:#172033}
html[data-theme="light"] .ol12-bankbox{background:rgba(255,255,255,.97);border-color:#d6e0ea}
html[data-theme="light"] .ol12-chip,html[data-theme="light"] .ol12-word{background:#f6f8fb;color:#172033;border-color:#cbd5e1}
html[data-theme="light"] .ol12-chip:hover,html[data-theme="light"] .ol12-chip.selected{background:#e9f7f9}
html[data-theme="light"] .ol12-clear{background:#e9eef5;color:#172033}
html[data-theme="light"] .ol12-score,html[data-theme="light"] .ol12-answerline,html[data-theme="light"] .ol12-note{background:#f3f6fa;color:#172033;border-color:#d6e0ea}
html[data-theme="light"] .ol12-ref img{border:1px solid #d6e0ea}
html[data-theme="light"] .ol12-sentence-target{background:#f6fbfc}
html[data-theme="light"] .ol12-native-images figure{background:#fff;border-color:#d6e0ea}
html[data-theme="light"] .ol12-native-images figcaption{color:#45566a}

/* Video learning */
html[data-theme="light"] .v12-video-hero{background:#fff!important;border-color:#d6e0ea!important}
html[data-theme="light"] .v12-video-controls{background:#eef3f8;border-color:#d6e0ea}
html[data-theme="light"] .v12-video-controls button{background:#fff;color:#245160;border-color:#a9c9d2}
html[data-theme="light"] .v12-video-copy h3,html[data-theme="light"] .v12-rule-es{color:#172033}
html[data-theme="light"] .v12-video-copy p,html[data-theme="light"] .v12-rule-pl,html[data-theme="light"] .v12-learning-heading p,html[data-theme="light"] .v12-learning-summary span{color:#5c6c80}
html[data-theme="light"] .v12-access-note{background:#eef8fa;color:#315a64}
html[data-theme="light"] .v12-rule-card button,html[data-theme="light"] .v12-learning-options button{background:#f6f8fb;color:#172033;border-color:#cbd5e1}
html[data-theme="light"] .v12-learning-options button.selected{background:#e8f7f9;border-color:#087f91}
html[data-theme="light"] .v12-learning-drop{background:#f7fafc;color:#547080}
html[data-theme="light"] .v12-learning-drop.filled{color:#172033}

/* V13 sentence builder */
.v13-sentence-head{display:flex;justify-content:space-between;gap:18px;align-items:flex-start;margin-bottom:14px}.v13-translation{margin:.8rem 0 .2rem;color:#b5c3d6;font-size:1.05rem}.v13-sentence-head h3{font-size:1.4rem}.v13-help{color:#93a5bb;margin-top:.4rem;line-height:1.55;max-width:900px}.v13-step{min-width:74px;height:60px;border-radius:14px;display:flex;align-items:baseline;justify-content:center;gap:3px;background:rgba(34,211,238,.08);border:1px solid rgba(34,211,238,.25);padding:12px}.v13-step strong{font-size:1.45rem;color:#67e8f9}.v13-step span{color:#8da0b6}.v13-sort-zone{min-height:104px;align-items:center;transition:border-color .2s,background .2s}.v13-target-empty{color:#6f879a;padding:8px}.v13-bank-title{margin-top:18px;margin-bottom:9px;color:#8ea1b8;font-size:.76rem;font-weight:900;letter-spacing:.08em}.v13-bank-title span{font-weight:600;letter-spacing:0}.v13-word-bank{padding:2px 0 5px}.v13-bank-word{display:inline-flex;align-items:center;gap:7px}.v13-bank-word.is-used{opacity:.25!important}.v13-bank-grip,.v13-token-grip{color:#6d8298;touch-action:none;user-select:none}.v13-sort-token{display:inline-flex;align-items:center;gap:7px;padding:7px 8px 7px 10px!important;cursor:grab;user-select:none;transition:transform .12s,border-color .12s,opacity .12s}.v13-sort-token.is-dragging,.v13-sort-token.is-pointer-dragging{opacity:.72;transform:scale(1.035);border-color:#22d3ee;z-index:20}.v13-token-controls{display:inline-flex;gap:3px;margin-left:2px}.v13-token-controls button{width:28px;height:28px;border-radius:7px;border:1px solid #3b4d64;background:#0d1725;color:#bcd0e4;font-weight:900;line-height:1}.v13-token-controls button:hover{border-color:#22d3ee;color:#67e8f9}.v13-sort-token.is-mismatch{border-color:#fb7185!important;box-shadow:0 0 0 2px rgba(251,113,133,.12)}.v13-sort-zone.is-correct{border-color:#34d399!important;background:rgba(52,211,153,.07)!important}.v13-sort-zone.is-wrong{border-color:#f59e0b}.v13-sentence-feedback.is-correct{background:rgba(52,211,153,.1);color:#a7f3d0}.v13-sentence-feedback.is-wrong{background:rgba(251,113,133,.09);color:#fecdd3}.v13-reordering{user-select:none;cursor:grabbing!important}.v13-reordering *{cursor:grabbing!important}.v13-sentence-actions{margin-top:18px}
html[data-theme="light"] .v13-translation{color:#4b5e73}html[data-theme="light"] .v13-help{color:#65768a}html[data-theme="light"] .v13-step{background:#eaf8fa;border-color:#b7dfe5}html[data-theme="light"] .v13-step strong{color:#087f91}html[data-theme="light"] .v13-step span{color:#65768a}html[data-theme="light"] .v13-token-controls button{background:#fff;color:#4b5e73;border-color:#cbd5e1}html[data-theme="light"] .v13-sentence-feedback.is-correct{color:#12673b}html[data-theme="light"] .v13-sentence-feedback.is-wrong{color:#a52b47}

/* V13 listening */
.v13-video-hero{grid-template-columns:1fr!important}.v13-listening-module .v12-video-copy{padding:20px 24px}.v13-listening-module .v12-video-copy h3{font-size:clamp(1.5rem,2.6vw,2.3rem)}.v13-listening-module .v12-feature-video{max-height:none;aspect-ratio:16/9}.v13-video-chapters{display:flex;gap:8px;flex-wrap:wrap;padding:10px 12px 13px;background:#080c13;border-top:1px solid #222c3a}.v13-video-chapters button{display:flex;gap:8px;align-items:center;border:1px solid #2c5e72;background:#101a26;color:#d7f5fa;border-radius:999px;padding:8px 12px;font-weight:800}.v13-video-chapters button span{font-family:monospace;color:#79ddea}.v13-open-listening{grid-column:1/-1}.v13-open-badge{display:inline-block;color:#f9a8d4;font-size:.72rem;font-weight:900;letter-spacing:.08em;margin-bottom:.55rem}.v13-open-hint{color:#96a8bc;margin:-.3rem 0 .8rem}.v13-listening-answer{width:100%;min-height:92px;resize:vertical;border:1px solid #3b4a61;border-radius:12px;background:#0b1220;color:#fff;padding:11px 12px}.v13-open-save{margin-top:9px;border:1px solid #2c8192;background:#0f2832;color:#c9f7ff;border-radius:10px;padding:9px 12px;font-weight:900}.v13-open-saved{border-color:#34d399!important}.v13-open-saved .v13-open-save{border-color:#34d399;color:#a7f3d0}
html[data-theme="light"] .v13-video-chapters{background:#eef3f8;border-color:#d6e0ea}html[data-theme="light"] .v13-video-chapters button{background:#fff;color:#264b55;border-color:#b7d5db}html[data-theme="light"] .v13-video-chapters button span{color:#087f91}html[data-theme="light"] .v13-open-hint{color:#64748b}html[data-theme="light"] .v13-listening-answer{background:#fff;color:#172033;border-color:#cbd5e1}html[data-theme="light"] .v13-open-save{background:#edf8fa;color:#245b66;border-color:#9fcfd6}

@media(max-width:700px){.v13-sentence-head{flex-direction:column}.v13-step{align-self:flex-end}.v13-token-controls button{width:31px;height:31px}.v13-sort-token{max-width:100%}.v13-video-chapters button{flex:1 1 46%;justify-content:center}.v12-video-controls button{flex:1 1 44%}}

/* V13 oral images: preserve the complete user-provided composition, never crop it. */
.ol12-oral-media{margin:0;position:relative;display:flex;flex-direction:column;min-width:0;border:1px solid #334155;border-radius:18px;overflow:hidden;background:#060b12}.ol12-oral-media img{display:block;width:100%;height:min(62vh,680px)!important;object-fit:contain!important;object-position:center;background:#060b12;border:0!important;border-radius:0!important;cursor:zoom-in}.ol12-oral-media figcaption{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:10px 12px;background:#0c1421;border-top:1px solid #263349;color:#91a6bd;font-size:.76rem;font-weight:900;letter-spacing:.06em}.ol12-oral-media figcaption button{border:1px solid #2d7183;background:#0f2631;color:#d2f8ff;border-radius:10px;padding:8px 11px;font-weight:900}.ol12-oral-media:fullscreen{background:#02050a;padding:18px}.ol12-oral-media:fullscreen img{height:calc(100vh - 72px)!important;max-height:none!important}.ol12-oral-media:fullscreen figcaption{background:#08101a}
html[data-theme="light"] .ol12-oral-media,html[data-theme="light"] .ol12-oral-media img{background:#eef2f7}html[data-theme="light"] .ol12-oral-media{border-color:#cbd5e1}html[data-theme="light"] .ol12-oral-media figcaption{background:#f8fafc;border-color:#dbe3ed;color:#5b6b7e}html[data-theme="light"] .ol12-oral-media figcaption button{background:#edf8fa;color:#155866;border-color:#9ccbd4}
@media(max-width:650px){.ol12-oral-media img{height:auto!important;max-height:72vh}.ol12-oral-media figcaption{align-items:flex-start;flex-direction:column}.ol12-oral-media figcaption button{width:100%}}
.v13-open-replay{display:inline-flex;align-items:center;gap:7px;margin:0 0 10px;border:1px solid #2d7183;background:#102430;color:#cdf7ff;border-radius:10px;padding:9px 12px;font-weight:900}.v13-open-replay:hover{border-color:#22d3ee;background:#123240}html[data-theme="light"] .v13-open-replay{background:#edf8fa;color:#155866;border-color:#9ccbd4}
.v13-check-answer{width:100%;margin-top:9px;border:0;border-radius:10px;padding:10px 12px;background:#22d3ee;color:#061018;font-weight:950;letter-spacing:.02em}.v13-check-answer:hover{filter:brightness(1.06)}html[data-theme="light"] .v13-check-answer{background:#0f93a6;color:#fff}