:root{--bg-primary: #0e121b;--bg-secondary: #151b29;--bg-tertiary: #1e263a;--glass-bg: rgba(21, 27, 41, .65);--glass-border: rgba(255, 255, 255, .08);--glass-border-hover: rgba(255, 255, 255, .16);--text-primary: #f8fafc;--text-secondary: #94a3b8;--text-muted: #64748b;--accent-quant: #78c2e6;--accent-quant-rgb: 120, 194, 230;--accent-verbal: #a093c4;--accent-verbal-rgb: 160, 147, 196;--accent-ai: #10b981;--accent-ai-rgb: 16, 185, 129;--primary: #4a7a96;--primary-hover: #3b617c;--primary-rgb: 74, 122, 150;--success: #10b981;--warning: #f59e0b;--danger: #ef4444;--radius-sm: 8px;--radius-md: 14px;--radius-lg: 24px;--transition-fast: .2s cubic-bezier(.4, 0, .2, 1);--transition-normal: .3s cubic-bezier(.4, 0, .2, 1)}*{box-sizing:border-box;margin:0;padding:0}body{font-family:Inter,system-ui,-apple-system,sans-serif;background-color:var(--bg-primary);background-image:radial-gradient(at 0% 0%,rgba(74,122,150,.16) 0px,transparent 50%),radial-gradient(at 100% 100%,rgba(120,194,230,.12) 0px,transparent 50%),radial-gradient(at 50% 50%,rgba(160,147,196,.06) 0px,transparent 50%);color:var(--text-primary);min-height:100vh;line-height:1.5}h1,h2,h3,h4,h5,h6{font-family:Outfit,sans-serif;font-weight:600;letter-spacing:-.02em}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:var(--bg-primary)}::-webkit-scrollbar-thumb{background:var(--bg-tertiary);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--text-muted)}.glass-panel{background:var(--glass-bg);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border:1px solid var(--glass-border);border-radius:var(--radius-md);box-shadow:0 8px 32px #0000005e;transition:border-color var(--transition-fast),transform var(--transition-fast),box-shadow var(--transition-fast);min-width:0;word-wrap:break-word;overflow-wrap:break-word}.glass-panel-hover:hover{border-color:var(--glass-border-hover);transform:translateY(-2px);box-shadow:0 12px 40px #00000080}button,.btn{cursor:pointer;font-family:Outfit,sans-serif;font-weight:500;font-size:.95rem;border-radius:var(--radius-sm);transition:all var(--transition-fast);display:inline-flex;align-items:center;justify-content:center;gap:8px;outline:none}.btn-primary{background:linear-gradient(135deg,var(--primary),var(--primary-hover));color:#fff;border:none;padding:10px 20px;box-shadow:0 4px 15px #6366f166}.btn-primary:hover{filter:brightness(1.1);box-shadow:0 6px 20px #6366f199;transform:translateY(-1px)}.btn-secondary{background:#ffffff0d;color:var(--text-primary);border:1px solid var(--glass-border);padding:10px 20px}.btn-secondary:hover{background:#ffffff1a;border-color:var(--text-secondary)}.btn-quant{background:linear-gradient(135deg,#00d2ff33,#0096ff33);color:#e0f7ff;border:1px solid rgba(0,210,255,.4);padding:10px 20px}.btn-quant:hover{background:linear-gradient(135deg,#00d2ff4d,#0096ff4d);border-color:var(--accent-quant);box-shadow:0 0 15px #00d2ff4d}.btn-verbal{background:linear-gradient(135deg,#d946ef33,#a21caf33);color:#fdf2ff;border:1px solid rgba(217,70,239,.4);padding:10px 20px}.btn-verbal:hover{background:linear-gradient(135deg,#d946ef4d,#a21caf4d);border-color:var(--accent-verbal);box-shadow:0 0 15px #d946ef4d}.btn-ai{background:linear-gradient(135deg,#10b98133,#04785733);color:#ecfdf5;border:1px solid rgba(16,185,129,.4);padding:10px 20px}.btn-ai:hover{background:linear-gradient(135deg,#10b9814d,#0478574d);border-color:var(--accent-ai);box-shadow:0 0 15px #10b9814d}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@keyframes slideInLeft{0%{opacity:0;transform:translate(-20px)}to{opacity:1;transform:translate(0)}}@keyframes pulseBorder{0%{box-shadow:0 0 #00d2ff66}70%{box-shadow:0 0 0 10px #00d2ff00}to{box-shadow:0 0 #00d2ff00}}.animate-fade-in{animation:fadeIn var(--transition-normal) forwards}.app-container{display:grid;grid-template-columns:260px 1fr;min-height:100vh;transition:grid-template-columns .3s cubic-bezier(.4,0,.2,1)}.app-container.sidebar-collapsed{grid-template-columns:0px 1fr}@media (max-width: 1024px){.app-container,.app-container.sidebar-collapsed{grid-template-columns:1fr!important}}.sidebar{border-right:1px solid var(--glass-border);padding:24px;display:flex;flex-direction:column;gap:32px;height:100vh;position:sticky;top:0;z-index:50;background:#0b0f19d9;transition:transform .3s cubic-bezier(.4,0,.2,1),width .3s cubic-bezier(.4,0,.2,1),padding .3s cubic-bezier(.4,0,.2,1);width:260px;transform:translate(0)}.sidebar.collapsed{transform:translate(-100%);width:0;padding:0;overflow:hidden;border-right-color:transparent}@media (max-width: 1024px){.sidebar{display:none!important}}.mobile-only-header{display:none!important}@media (max-width: 1024px){.mobile-only-header{display:flex!important}}.brand-section{display:flex;flex-direction:column;align-items:center;gap:12px;text-align:center;width:100%}.logo-container{width:100%;height:80px;display:flex;align-items:center;justify-content:center;overflow:hidden}.logo-container img{height:100%;width:auto;object-fit:contain}@media (max-width: 1024px){.brand-section{flex-direction:row;align-items:center;text-align:left;width:auto}.logo-container{width:auto;height:40px}}.brand-name{font-size:1.4rem;font-weight:800;background:linear-gradient(135deg,#fff,#94a3b8);-webkit-background-clip:text;-webkit-text-fill-color:transparent}.nav-links{display:flex;flex-direction:column;gap:8px;flex-grow:1}@media (max-width: 1024px){.nav-links{display:none}}.nav-item{padding:12px 16px;border-radius:var(--radius-sm);display:flex;align-items:center;gap:12px;color:var(--text-secondary);font-family:Outfit,sans-serif;font-weight:500;cursor:pointer;transition:all var(--transition-fast);background:transparent;border:none;width:100%;text-align:left}.nav-item:hover{background:#ffffff0d;color:var(--text-primary)}.nav-item.active{background:linear-gradient(90deg,#6366f126,#6366f108);color:var(--primary);border-left:3px solid var(--primary);padding-left:13px}.nav-item.active.quant{background:linear-gradient(90deg,#00d2ff26,#00d2ff08);color:var(--accent-quant);border-left:3px solid var(--accent-quant)}.nav-item.active.verbal{background:linear-gradient(90deg,#d946ef26,#d946ef08);color:var(--accent-verbal);border-left:3px solid var(--accent-verbal)}.nav-item.active.ai{background:linear-gradient(90deg,#10b98126,#10b98108);color:var(--accent-ai);border-left:3px solid var(--accent-ai)}.main-content{padding:40px;max-width:1200px;width:100%;margin:0 auto;min-height:100vh}@media (max-width: 768px){.main-content{padding:16px}}@media (min-width: 1025px){.desktop-collapsed-padding{padding-left:80px}}.dashboard-header{margin-bottom:32px}.dashboard-grid{display:grid;grid-template-columns:2fr 1fr;gap:24px}@media (max-width: 900px){.dashboard-grid{grid-template-columns:1fr}}.metrics-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:16px;margin-bottom:24px}.metric-card{padding:20px;display:flex;align-items:center;gap:16px}.metric-icon-box{width:48px;height:48px;border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center}.metric-icon-box.primary{background:#6366f126;color:var(--primary)}.metric-icon-box.quant{background:#00d2ff26;color:var(--accent-quant)}.metric-icon-box.verbal{background:#d946ef26;color:var(--accent-verbal)}.metric-icon-box.ai{background:#10b98126;color:var(--accent-ai)}.metric-val{font-size:1.5rem;font-weight:700;font-family:Outfit,sans-serif}.tab-container{display:flex;gap:12px;border-bottom:1px solid var(--glass-border);padding-bottom:1px;margin-bottom:24px}.section-tab{background:transparent;border:none;color:var(--text-secondary);font-size:1rem;font-family:Outfit,sans-serif;font-weight:500;padding:12px 16px;position:relative;transition:color var(--transition-fast)}.section-tab:hover,.section-tab.active{color:var(--text-primary)}.section-tab.active:after{content:"";position:absolute;bottom:-1px;left:0;right:0;height:2px;background:var(--primary);border-radius:2px}.section-tab.active.quant:after{background:var(--accent-quant)}.section-tab.active.verbal:after{background:var(--accent-verbal)}.cards-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:20px}.pdf-card{padding:24px;display:flex;flex-direction:column;justify-content:space-between;min-height:200px;border-left:4px solid var(--primary)}.pdf-card.quant{border-left-color:var(--accent-quant)}.pdf-card.verbal{border-left-color:var(--accent-verbal)}.pdf-card-title{font-size:1.15rem;margin-bottom:8px}.pdf-card-footer{display:flex;justify-content:space-between;align-items:center;margin-top:16px}.concept-list{display:flex;flex-direction:column;gap:16px}.concept-card{padding:20px}.concept-header{display:flex;justify-content:space-between;align-items:center;cursor:pointer}.concept-body{margin-top:16px;padding-top:16px;border-top:1px solid var(--glass-border);color:var(--text-secondary)}.concept-body p{margin-bottom:12px}.example-box{background:#ffffff08;border:1px solid var(--glass-border);border-radius:var(--radius-sm);padding:16px;margin-top:12px}.quiz-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:24px}.question-card{padding:32px;margin-bottom:24px}.options-list{display:flex;flex-direction:column;gap:12px;margin-top:24px}.option-btn{background:#ffffff05;border:1px solid var(--glass-border);border-radius:var(--radius-sm);padding:16px 20px;text-align:left;justify-content:flex-start;color:var(--text-primary);width:100%}.option-btn:hover:not(:disabled){background:#ffffff0f;border-color:var(--text-secondary)}.option-btn.selected{border-color:var(--primary);background:#6366f114}.option-btn.correct{border-color:var(--success);background:#10b9811a;color:#a7f3d0}.option-btn.incorrect{border-color:var(--danger);background:#ef44441a;color:#fca5a5}.explanation-panel{margin-top:24px;padding:20px;border-radius:var(--radius-sm);background:#10b98108;border:1px solid rgba(16,185,129,.15);color:var(--text-secondary)}.flashcard-wrapper{perspective:1000px;width:100%;max-width:450px;height:300px;margin:0 auto 32px;cursor:pointer}.flashcard-inner{position:relative;width:100%;height:100%;transition:transform .6s cubic-bezier(.4,0,.2,1);transform-style:preserve-3d}.flashcard-wrapper.flipped .flashcard-inner{transform:rotateY(180deg)}.flashcard-face{position:absolute;width:100%;height:100%;backface-visibility:hidden;-webkit-backface-visibility:hidden;border-radius:var(--radius-lg);padding:40px;display:flex;flex-direction:column;justify-content:center;align-items:center;text-align:center;border:2px solid var(--glass-border);box-shadow:0 10px 40px #0006}.flashcard-front{background:linear-gradient(135deg,var(--bg-secondary),var(--bg-tertiary))}.flashcard-back{background:linear-gradient(135deg,var(--bg-tertiary),var(--bg-secondary));transform:rotateY(180deg)}.scratchpad-container{display:grid;grid-template-rows:auto 1fr;height:400px;border:1px solid var(--glass-border);border-radius:var(--radius-md);overflow:hidden}.scratchpad-toolbar{padding:12px;background:var(--bg-secondary);border-bottom:1px solid var(--glass-border);display:flex;align-items:center;justify-content:space-between;gap:12px}.scratchpad-canvas{background:#111827;cursor:crosshair;width:100%;height:100%}.ai-planner-grid{display:grid;grid-template-columns:1fr 1fr;gap:32px}@media (max-width: 900px){.ai-planner-grid{grid-template-columns:1fr}}.calendar-view{display:flex;flex-direction:column;gap:16px}.calendar-day-card{padding:16px;display:flex;justify-content:space-between;align-items:center;border-left:3px solid var(--accent-ai)}.calendar-day-card.completed{border-left-color:var(--text-muted);opacity:.7}.ai-chat-box{display:flex;flex-direction:column;height:500px;overflow:hidden}.ai-chat-messages{flex-grow:1;overflow-y:auto;padding:20px;display:flex;flex-direction:column;gap:16px;background:#0000001a}.chat-message{max-width:80%;padding:14px 18px;border-radius:var(--radius-md);font-size:.95rem}.chat-message.bot{background:var(--bg-tertiary);border:1px solid var(--glass-border);align-self:flex-start;border-top-left-radius:0;color:var(--text-primary)}.chat-message.user{background:linear-gradient(135deg,var(--primary),var(--primary-hover));align-self:flex-end;border-top-right-radius:0;color:#fff}.ai-chat-input-area{padding:16px;background:var(--bg-secondary);border-top:1px solid var(--glass-border);display:flex;gap:12px}.ai-chat-input{flex-grow:1;background:var(--bg-primary);border:1px solid var(--glass-border);color:var(--text-primary);border-radius:var(--radius-sm);padding:12px 16px;outline:none;font-family:inherit}.ai-chat-input:focus{border-color:var(--accent-ai)}.mobile-nav-toggle{display:none;background:none;border:none;color:#fff}@media (max-width: 1024px){.mobile-nav-toggle{display:block}}.quiz-layout{display:flex;flex-direction:column;gap:28px;width:100%}.pdf-viewer-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:#000000d9;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);z-index:1000;display:flex;align-items:center;justify-content:center;padding:20px}.pdf-viewer-card{max-width:1100px;width:100%;height:88vh;display:flex;flex-direction:column;padding:0;overflow:hidden;border:1px solid rgba(255,255,255,.1);border-radius:var(--radius-md)}@media (max-width: 768px){.pdf-viewer-overlay{padding:0}.pdf-viewer-card{height:100vh;border-radius:0;border:none}}body.light-theme{--bg-primary: #f5f7fa;--bg-secondary: #ffffff;--bg-tertiary: #e4e9f0;--glass-bg: rgba(255, 255, 255, .7);--glass-border: rgba(0, 0, 0, .08);--glass-border-hover: rgba(0, 0, 0, .16);--text-primary: #0f172a;--text-secondary: #475569;--text-muted: #64748b;--accent-quant: #3b82f6;--accent-quant-rgb: 59, 130, 246;--accent-verbal: #8b5cf6;--accent-verbal-rgb: 139, 92, 246;--accent-ai: #10b981;--accent-ai-rgb: 16, 185, 129;--primary: #4a7a96;--primary-hover: #3b617c;--primary-rgb: 74, 122, 150;--success: #059669;--warning: #d97706;--danger: #dc2626;background-image:radial-gradient(at 0% 0%,rgba(74,122,150,.08) 0px,transparent 50%),radial-gradient(at 100% 100%,rgba(120,194,230,.08) 0px,transparent 50%),radial-gradient(at 50% 50%,rgba(160,147,196,.03) 0px,transparent 50%)}body.light-theme .option-btn.correct{color:#059669!important}body.light-theme .option-btn.incorrect{color:#dc2626!important}body.light-theme .btn-quant{background:#3b82f61a;color:#1e3a8a;border:1px solid rgba(59,130,246,.3)}body.light-theme .btn-quant:hover{background:#3b82f633;border-color:#3b82f6;box-shadow:0 0 10px #3b82f633}body.light-theme .btn-verbal{background:#8b5cf61a;color:#4c1d95;border:1px solid rgba(139,92,246,.3)}body.light-theme .btn-verbal:hover{background:#8b5cf633;border-color:#8b5cf6;box-shadow:0 0 10px #8b5cf633}body.light-theme .sidebar{background:#ffffffd9;border-right:1px solid rgba(0,0,0,.08)}body.light-theme .brand-name{background:linear-gradient(135deg,#0f172a,#475569);-webkit-background-clip:text;-webkit-text-fill-color:transparent}body.light-theme .nav-item:hover{background:#00000008;color:var(--text-primary)}body.light-theme .nav-item.active{background:linear-gradient(90deg,#4a7a9614,#4a7a9605)}body.light-theme .btn-secondary{background:#00000005;color:var(--text-primary);border:1px solid rgba(0,0,0,.08)}body.light-theme .btn-secondary:hover{background:#0000000d}body.light-theme .option-btn{background:#00000003}body.light-theme .option-btn:hover:not(:disabled){background:#00000008;border-color:#00000026}body.light-theme .ai-chat-messages{background:#00000005}body.light-theme .chat-message.bot{background:var(--bg-secondary);color:var(--text-primary)}body.light-theme .example-box{background:#00000003}.desktop-only-trigger{display:flex!important}@media (max-width: 1024px){.desktop-only-trigger{display:none!important}}body.light-theme .section-tab{color:#475569!important}body.light-theme .section-tab.active{color:var(--text-primary)!important}