@import "https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;500;600;700;800&family=Outfit:wght@400;500;600;700;800;900&display=swap";:root{--font-sans:"Plus Jakarta Sans", "Outfit", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--bg-primary:#f8fafc;--bg-secondary:#fff;--text-primary:#0c2b5c;--text-secondary:#334155;--text-muted:#64748b;--primary:#0050d4;--primary-hover:#0041ab;--primary-gradient:linear-gradient(135deg, #0050d4 0%, #07f 100%);--primary-glow:#0050d438;--primary-light:#0050d414;--accent-gold:#f59e0b;--accent-gold-gradient:linear-gradient(135deg, #f59e0b 0%, #d97706 100%);--accent-gold-glow:#f59e0b40;--accent-cyan:#00b0ff;--accent-cyan-light:#00b0ff14;--accent-blue:#0284c7;--accent-purple:#6366f1;--success:#10b981;--success-bg:#ecfdf5;--success-border:#10b9814d;--error:#f43f5e;--error-bg:#fff1f2;--error-border:#f43f5e4d;--warning:#f59e0b;--warning-bg:#fef3c7;--border-color:#e2e8f0;--border-focus:#94a3b8;--card-bg:#fffffff2;--card-border:#0050d41a;--card-shadow:0 10px 30px -8px #0050d412, 0 2px 6px #00000005;--header-height:4.5rem;--bottom-nav-height:4.5rem}[data-theme=dark]{--bg-primary:#0a0f1d;--bg-secondary:#0f172a;--text-primary:#f8fafc;--text-secondary:#94a3b8;--text-muted:#64748b;--border-color:#1e293b;--border-focus:#3b82f6;--card-bg:#0f172ac7;--card-border:#3b82f633;--card-shadow:0 16px 40px -16px #00000080;--success-bg:#10b9811f;--error-bg:#f43f5e1f;--warning-bg:#f59e0b1f}*{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-sans);background-color:var(--bg-primary);color:var(--text-primary);-webkit-font-smoothing:antialiased;min-height:100vh;line-height:1.5;overflow-x:hidden}.bg-glow-container{pointer-events:none;z-index:0;position:fixed;inset:0;overflow:hidden}.bg-glow-1{filter:blur(85px);opacity:.65;background:radial-gradient(circle,#0050d429 0%,#0000 70%);width:550px;height:550px;position:absolute;top:-10%;left:20%}.bg-glow-2{filter:blur(90px);opacity:.45;background:radial-gradient(circle,#00b0ff1f 0%,#0000 70%);width:480px;height:480px;position:absolute;bottom:10%;right:15%}.app-container{z-index:1;flex-direction:column;min-height:100vh;display:flex;position:relative}.app-header{z-index:100;height:var(--header-height);background:var(--card-bg);-webkit-backdrop-filter:blur(20px);border-bottom:1px solid var(--card-border);justify-content:space-between;align-items:center;padding:0 1.5rem;display:flex;position:sticky;top:0;box-shadow:0 4px 20px #00000008}.glass-card{background:var(--card-bg);-webkit-backdrop-filter:blur(20px);border:1px solid var(--card-border);box-shadow:var(--card-shadow);border-radius:24px;padding:1.75rem;transition:all .25s cubic-bezier(.16,1,.3,1)}.glass-card-hover:hover{border-color:var(--primary);box-shadow:0 20px 40px -15px var(--primary-glow);transform:translateY(-2px)}.btn{font-family:var(--font-sans);cursor:pointer;-webkit-user-select:none;user-select:none;border:1px solid #0000;border-radius:14px;justify-content:center;align-items:center;gap:.5rem;padding:.7rem 1.35rem;font-size:.9rem;font-weight:600;text-decoration:none;transition:all .2s cubic-bezier(.16,1,.3,1);display:inline-flex}.btn:active{transform:scale(.98)}.btn-primary{background:var(--primary-gradient);color:#fff;box-shadow:0 4px 16px var(--primary-glow)}.btn-primary:hover{opacity:.95;box-shadow:0 6px 20px var(--primary-glow);transform:translateY(-1px)}.btn-secondary{background:var(--bg-secondary);color:var(--text-primary);border-color:var(--border-color)}.btn-secondary:hover{background:var(--bg-primary);border-color:var(--border-focus)}.badge{letter-spacing:.3px;border-radius:9999px;align-items:center;gap:.35rem;padding:.35rem .85rem;font-size:.78rem;font-weight:700;display:inline-flex}.badge-primary,.badge-blue{color:#0050d4;background:#0050d414;border:1px solid #0050d433}[data-theme=dark] .badge-primary,[data-theme=dark] .badge-blue{color:#60a5fa;background:#3b82f629;border:1px solid #3b82f64d}.badge-emerald{color:#059669;background:#10b9811f;border:1px solid #10b98140}[data-theme=dark] .badge-emerald{color:#10b981;background:#10b98126;border:1px solid #10b9814d}.badge-gold{color:#d97706;background:#f59e0b1f;border:1px solid #f59e0b47}[data-theme=dark] .badge-gold{color:#f59e0b;background:#f59e0b26;border:1px solid #f59e0b4d}.badge-purple{color:#6366f1;background:#6366f11f;border:1px solid #6366f147}[data-theme=dark] .badge-purple{color:#818cf8;background:#6366f129;border:1px solid #6366f14d}@keyframes fadeIn{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}@keyframes pulseGlow{0%,to{opacity:.8;transform:scale(1)}50%{opacity:1;transform:scale(1.05)}}.fade-in{animation:.3s cubic-bezier(.16,1,.3,1) forwards fadeIn}.nav-tab-button{color:var(--text-secondary);cursor:pointer;white-space:nowrap;background:0 0;border:none;border-radius:12px;align-items:center;gap:.6rem;padding:.65rem 1.15rem;font-size:.88rem;font-weight:600;transition:all .2s cubic-bezier(.16,1,.3,1);display:flex}.nav-tab-button:hover{color:var(--text-primary);background:var(--bg-primary)}.nav-tab-button.active{background:var(--primary-gradient);color:#fff;box-shadow:0 4px 14px var(--primary-glow)}.bottom-nav{display:none}@media (width<=850px){.desktop-nav{display:none!important}.bottom-nav{height:var(--bottom-nav-height);background:var(--card-bg);-webkit-backdrop-filter:blur(20px);border-top:1px solid var(--card-border);z-index:100;justify-content:space-around;align-items:center;padding:0 .5rem;display:flex;position:fixed;bottom:0;left:0;right:0}.bottom-nav-item{color:var(--text-muted);cursor:pointer;background:0 0;border:none;border-radius:12px;flex-direction:column;flex:1;align-items:center;gap:.25rem;padding:.4rem .5rem;font-size:.72rem;font-weight:600;transition:all .2s;display:flex}.bottom-nav-item.active{color:var(--primary)}.main-content{padding-bottom:calc(var(--bottom-nav-height) + 1.5rem)!important}}.flip-card-perspective{perspective:1200px}.flip-card-inner{width:100%;transform-style:preserve-3d;transition:transform .5s cubic-bezier(.175,.885,.32,1.275);position:relative}.flip-card-inner.flipped{transform:rotateY(180deg)}.flip-card-front,.flip-card-back{backface-visibility:hidden;border-radius:24px;width:100%;position:absolute}.flip-card-back{transform:rotateY(180deg)}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:var(--bg-primary)}::-webkit-scrollbar-thumb{background:var(--border-color);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--border-focus)}.timer-box{background:var(--bg-primary);border:1px solid var(--border-color);color:var(--text-primary);transition:all .25s}.timer-box.urgent{animation:1.2s ease-in-out infinite timerPulse;border-color:var(--error)!important;color:var(--error)!important;background:#f43f5e1f!important}@keyframes timerPulse{0%{box-shadow:0 0 #f43f5e73}70%{box-shadow:0 0 0 8px #f43f5e00}to{box-shadow:0 0 #f43f5e00}}.urgent-badge{background:var(--error);color:#fff;letter-spacing:.02em;border-radius:6px;padding:2px 7px;font-size:.72rem;font-weight:800;animation:.9s infinite alternate urgentBlink}@keyframes urgentBlink{0%{opacity:.85;transform:scale(.98)}to{opacity:1;transform:scale(1.03)}}.flag-question-btn{-webkit-user-select:none;user-select:none;transition:all .2s}.flag-question-btn:hover{filter:brightness(1.08);transform:translateY(-1px)}.flag-question-btn:active{transform:translateY(0)}.flag-question-btn.flagged{box-shadow:0 2px 8px #f59e0b40}.quiz-cbt-grid{grid-template-columns:minmax(0,1fr) 320px;align-items:start;gap:1.25rem;display:grid}@media (width<=960px){.quiz-cbt-grid{grid-template-columns:1fr}}.quiz-cbt-sidebar{flex-direction:column;gap:1rem;display:flex;position:sticky;top:90px}.quiz-option-btn{border:1px solid var(--border-color);background:var(--bg-primary);color:var(--text-primary);text-align:left;cursor:pointer;border-radius:14px;align-items:flex-start;gap:.9rem;width:100%;padding:1rem 1.2rem;font-size:.94rem;line-height:1.55;transition:all .2s cubic-bezier(.16,1,.3,1);display:flex}.quiz-option-btn:hover:not(:disabled){border-color:var(--primary);background:var(--primary-light);transform:translate(4px)}.quiz-option-letter{border:1.5px solid var(--border-color);background:var(--bg-secondary);width:28px;height:28px;color:var(--text-secondary);border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;font-size:.82rem;font-weight:800;transition:all .2s;display:flex}.anki-rating-container{grid-template-columns:repeat(3,1fr);gap:.75rem;margin-top:1rem;display:grid}@media (width<=600px){.anki-rating-container{grid-template-columns:1fr}}.anki-rating-btn{cursor:pointer;-webkit-user-select:none;user-select:none;border:1px solid;border-radius:14px;flex-direction:column;justify-content:center;align-items:center;gap:.35rem;padding:.85rem 1rem;font-weight:700;transition:all .2s cubic-bezier(.16,1,.3,1);display:flex}.anki-rating-btn:hover{filter:brightness(1.1);transform:translateY(-2px)}.anki-btn-hard{color:#f43f5e;background:#f43f5e1a;border-color:#f43f5e4d}.anki-btn-hard:hover{background:#f43f5e33;box-shadow:0 4px 15px #f43f5e33}.anki-btn-medium{color:#f59e0b;background:#f59e0b1a;border-color:#f59e0b4d}.anki-btn-medium:hover{background:#f59e0b33;box-shadow:0 4px 15px #f59e0b33}.anki-btn-easy{color:#10b981;background:#10b9811a;border-color:#10b9814d}.anki-btn-easy:hover{background:#10b98133;box-shadow:0 4px 15px #10b98133}.citation-pill{color:#0050d4;letter-spacing:.02em;background:#0050d414;border:1px solid #0050d433;border-radius:8px;align-items:center;gap:5px;padding:3px 9px;font-size:.76rem;font-weight:800;display:inline-flex}[data-theme=dark] .citation-pill{color:#60a5fa;background:#3b82f624;border-color:#3b82f640}.bullet-list-item{color:var(--text-primary);align-items:flex-start;gap:8px;padding:4px 0;font-size:.92rem;line-height:1.55;display:flex}.bullet-dot{background:var(--primary);border-radius:50%;flex-shrink:0;width:6px;height:6px;margin-top:8px}