:root{--bg: var(--tg-theme-bg-color, #1a1a2e);--bg-secondary: var(--tg-theme-secondary-bg-color, #16213e);--text: var(--tg-theme-text-color, #eaeaea);--text-secondary: var(--tg-theme-hint-color, #999);--accent: var(--tg-theme-button-color, #6c63ff);--accent-text: var(--tg-theme-button-text-color, #fff);--card-bg: rgba(255, 255, 255, .06);--border: rgba(255, 255, 255, .1);--radius: 12px;--radius-sm: 8px}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--text);min-height:100vh;-webkit-font-smoothing:antialiased}.app{max-width:480px;margin:0 auto;padding-bottom:72px}.loading-screen{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:80vh;gap:16px}.loading-inline{display:flex;justify-content:center;padding:40px}.spinner{width:32px;height:32px;border:3px solid var(--border);border-top-color:var(--accent);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.page{padding:16px}.home-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px}.home-header h1{font-size:24px;font-weight:700}.coins-badge{display:flex;align-items:center;gap:4px;background:var(--card-bg);padding:6px 12px;border-radius:20px;font-weight:600;font-size:14px}.coin-icon{font-size:16px}.category-filter{display:flex;flex-wrap:wrap;gap:6px;padding-bottom:8px;margin-bottom:12px}.category-chip{background:var(--card-bg);border:1px solid var(--border);color:var(--text-secondary);padding:4px 10px;border-radius:14px;font-size:12px;white-space:nowrap;cursor:pointer;transition:all .2s;flex-shrink:0}.category-chip.active{background:var(--accent);color:var(--accent-text);border-color:var(--accent)}.quiz-list{display:flex;flex-direction:column;gap:12px}.quiz-card{background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius);padding:16px;text-align:left;cursor:pointer;transition:transform .15s,box-shadow .15s;width:100%;color:var(--text)}.quiz-card:active{transform:scale(.98)}.quiz-card-header{display:flex;justify-content:space-between;margin-bottom:8px}.quiz-category{font-size:12px;color:var(--accent);font-weight:600;text-transform:uppercase}.quiz-difficulty{font-size:12px;font-weight:600}.quiz-title{font-size:17px;font-weight:600;margin-bottom:4px}.quiz-desc{font-size:13px;color:var(--text-secondary);margin-bottom:8px}.quiz-meta{font-size:12px;color:var(--text-secondary)}.countdown-screen{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:70vh;gap:24px}.countdown-number{font-size:72px;font-weight:800;color:var(--accent);animation:pulse .5s ease-in-out}@keyframes pulse{0%,to{transform:scale(1)}50%{transform:scale(1.2)}}.question-view{min-height:70vh;display:flex;flex-direction:column}.question-header{display:flex;align-items:center;gap:10px;margin-bottom:20px}.question-counter{font-size:14px;font-weight:600;white-space:nowrap;color:var(--text-secondary)}.timer-bar{flex:1;height:6px;background:var(--border);border-radius:3px;overflow:hidden}.timer-fill{height:100%;border-radius:3px;transition:width 1s linear,background-color .5s}.timer-text{font-size:14px;font-weight:600;min-width:28px;text-align:right}.question-text{font-size:20px;font-weight:600;margin-bottom:24px;line-height:1.4}.question-image{max-width:100%;border-radius:var(--radius);margin-bottom:16px}.options{display:flex;flex-direction:column;gap:10px;margin-top:auto}.option{display:flex;align-items:center;gap:12px;padding:14px 16px;background:var(--card-bg);border:2px solid var(--border);border-radius:var(--radius);cursor:pointer;transition:all .2s;text-align:left;color:var(--text);font-size:15px}.option:active{transform:scale(.98)}.option.selected{border-color:var(--accent);background:#6c63ff26}.option-letter{display:flex;align-items:center;justify-content:center;width:28px;height:28px;border-radius:50%;background:var(--border);font-size:13px;font-weight:700;flex-shrink:0}.option.selected .option-letter{background:var(--accent);color:var(--accent-text)}.results-page{text-align:center}.results-header{padding:24px 0}.results-emoji{font-size:48px;margin-bottom:8px}.results-header h1{font-size:48px;font-weight:800}.results-percent{font-size:18px;color:var(--text-secondary);margin-top:4px}.results-quiz-title{font-size:14px;color:var(--text-secondary);margin-top:8px}.results-details{text-align:left;margin:16px 0}.results-details h3{margin-bottom:10px;font-size:16px}.result-row{display:flex;align-items:flex-start;gap:10px;padding:10px 0;border-bottom:1px solid var(--border);font-size:14px}.result-icon{font-size:16px;font-weight:700;flex-shrink:0}.result-row.correct .result-icon{color:#4caf50}.result-row.wrong .result-icon{color:#f44336}.correct-answer{color:#4caf50;font-size:13px;margin-top:4px}.results-coins{background:linear-gradient(135deg,gold,#fa0);color:#1a1a2e;font-weight:700;padding:12px;border-radius:var(--radius);margin:16px 0;font-size:16px}.results-actions{display:flex;flex-direction:column;gap:10px;margin-top:16px}.btn-primary{background:var(--accent);color:var(--accent-text);border:none;padding:14px;border-radius:var(--radius);font-size:16px;font-weight:600;cursor:pointer;width:100%;transition:opacity .2s}.btn-primary:active{opacity:.8}.btn-secondary{background:var(--card-bg);color:var(--text);border:1px solid var(--border);padding:14px;border-radius:var(--radius);font-size:16px;font-weight:600;cursor:pointer;width:100%}.profile-header{display:flex;flex-direction:column;align-items:center;padding:20px 0;gap:4px}.profile-avatar{width:72px;height:72px;border-radius:50%;object-fit:cover;margin-bottom:8px}.profile-avatar.placeholder{display:flex;align-items:center;justify-content:center;background:var(--accent);color:var(--accent-text);font-size:28px;font-weight:700}.profile-username{font-size:14px;color:var(--text-secondary)}.stats-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-bottom:24px}.stat-card{background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius);padding:16px;text-align:center}.stat-value{display:block;font-size:24px;font-weight:700}.stat-label{font-size:12px;color:var(--text-secondary);margin-top:4px}.lang-section{display:flex;justify-content:space-between;align-items:center;background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius);padding:12px 16px;margin-bottom:24px}.lang-section-label{font-size:15px;font-weight:500}.lang-switcher{display:flex;gap:0;background:var(--border);border-radius:20px;padding:2px}.lang-btn{padding:6px 16px;border:none;border-radius:18px;font-size:14px;font-weight:600;cursor:pointer;background:transparent;color:var(--text-secondary);transition:all .2s}.lang-btn.active{background:var(--accent);color:var(--accent-text)}.section-title{font-size:16px;font-weight:600;margin-bottom:12px}.history-list{display:flex;flex-direction:column}.history-row{display:flex;justify-content:space-between;align-items:center;padding:12px 0;border-bottom:1px solid var(--border)}.history-info{display:flex;flex-direction:column;gap:2px}.history-title{font-size:14px;font-weight:500}.history-date{font-size:12px;color:var(--text-secondary)}.history-score{font-size:16px;font-weight:700;color:var(--accent)}.leaderboard-page h1{font-size:22px;margin-bottom:16px}.my-rank-card{background:linear-gradient(135deg,var(--accent),#8b7fff);color:var(--accent-text);border-radius:var(--radius);padding:14px 16px;display:flex;justify-content:space-between;align-items:center;margin-bottom:16px;font-size:14px}.leaderboard-list{display:flex;flex-direction:column}.leaderboard-row{display:flex;align-items:center;gap:12px;padding:12px 0;border-bottom:1px solid var(--border)}.leaderboard-row.is-me{background:#6c63ff1a;margin:0 -16px;padding:12px 16px;border-radius:var(--radius-sm)}.lb-rank{font-size:16px;font-weight:700;min-width:36px}.lb-user{flex:1;display:flex;flex-direction:column;gap:2px}.lb-name{font-size:15px;font-weight:500}.lb-games{font-size:12px;color:var(--text-secondary)}.lb-score{font-size:18px;font-weight:700;color:var(--accent)}.bottom-nav{position:fixed;bottom:0;left:0;right:0;display:flex;justify-content:center;background:var(--bg-secondary);border-top:1px solid var(--border);padding:8px 0;padding-bottom:calc(8px + env(safe-area-inset-bottom));z-index:100}.nav-tab{flex:1;max-width:160px;display:flex;flex-direction:column;align-items:center;gap:2px;padding:6px;background:none;border:none;color:var(--text-secondary);cursor:pointer;font-size:11px;transition:color .2s}.nav-tab.active{color:var(--accent)}.nav-icon{font-size:20px}.nav-label{font-weight:500}.empty-state{text-align:center;color:var(--text-secondary);padding:32px 16px;font-size:14px}