:root{--bg-primary: #f5f7fb;--bg-secondary: #ffffff;--bg-warm: #fefcf8;--surface: rgba(255, 255, 255, .85);--surface-solid: #ffffff;--surface-hover: rgba(255, 255, 255, .95);--surface-border: rgba(0, 0, 0, .07);--surface-border-hover: rgba(79, 70, 229, .25);--accent: #4f46e5;--accent-light: #818cf8;--accent-glow: rgba(79, 70, 229, .12);--accent-glow-strong: rgba(79, 70, 229, .3);--teal: #0ea5e9;--emerald: #10b981;--amber: #f59e0b;--rose: #f43f5e;--text-primary: #1e293b;--text-secondary: #64748b;--text-tertiary: #94a3b8;--success: #10b981;--warning: #f59e0b;--danger: #ef4444;--info: #3b82f6;--font-display: "Playfair Display", Georgia, serif;--font-body: "DM Sans", system-ui, sans-serif;--space-1: 4px;--space-2: 8px;--space-3: 12px;--space-4: 16px;--space-5: 24px;--space-6: 32px;--space-7: 48px;--space-8: 64px;--space-9: 96px;--radius-sm: 10px;--radius-md: 14px;--radius-lg: 20px;--radius-xl: 28px;--radius-pill: 50px;--shadow-xs: 0 1px 3px rgba(0, 0, 0, .04);--shadow-sm: 0 2px 8px rgba(0, 0, 0, .06);--shadow-md: 0 8px 24px rgba(0, 0, 0, .08);--shadow-lg: 0 16px 48px rgba(0, 0, 0, .1);--shadow-glow: 0 4px 20px rgba(79, 70, 229, .12);--shadow-card-hover: 0 12px 32px rgba(79, 70, 229, .15);--ease-out: cubic-bezier(.22, 1, .36, 1);--ease-spring: cubic-bezier(.34, 1.56, .64, 1);--transition-fast: .15s var(--ease-out);--transition-base: .3s var(--ease-out);--transition-slow: .5s var(--ease-out);--sidebar-width: 272px}html.dark{--bg-primary: #0f172a;--bg-secondary: #1e293b;--bg-warm: #1a2332;--surface: rgba(30, 41, 59, .85);--surface-solid: #1e293b;--surface-hover: rgba(30, 41, 59, .95);--surface-border: rgba(255, 255, 255, .08);--surface-border-hover: rgba(129, 140, 248, .3);--accent-glow: rgba(129, 140, 248, .15);--accent-glow-strong: rgba(129, 140, 248, .35);--text-primary: #f1f5f9;--text-secondary: #94a3b8;--text-tertiary: #64748b;--shadow-xs: 0 1px 3px rgba(0, 0, 0, .2);--shadow-sm: 0 2px 8px rgba(0, 0, 0, .25);--shadow-md: 0 8px 24px rgba(0, 0, 0, .3);--shadow-lg: 0 16px 48px rgba(0, 0, 0, .4);--shadow-glow: 0 4px 20px rgba(129, 140, 248, .15);--shadow-card-hover: 0 12px 32px rgba(129, 140, 248, .2)}html.dark body{background-image:radial-gradient(ellipse at 20% 30%,rgba(129,140,248,.06) 0%,transparent 50%),radial-gradient(ellipse at 80% 60%,rgba(14,165,233,.04) 0%,transparent 50%),radial-gradient(ellipse at 50% 90%,rgba(16,185,129,.03) 0%,transparent 40%)}html.dark .sidebar{box-shadow:2px 0 12px #0003}html.dark .message.user{background:linear-gradient(135deg,var(--accent),#6366f1)}html.dark .message.bot{background:#818cf814;border-color:#818cf81f}html.dark .pdf-item i{color:#fb7185}*,*:before,*:after{margin:0;padding:0;box-sizing:border-box}html{-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;text-rendering:optimizeLegibility;scroll-behavior:smooth}body{background-color:var(--bg-primary);background-image:radial-gradient(ellipse at 20% 30%,rgba(79,70,229,.04) 0%,transparent 50%),radial-gradient(ellipse at 80% 60%,rgba(14,165,233,.03) 0%,transparent 50%),radial-gradient(ellipse at 50% 90%,rgba(16,185,129,.02) 0%,transparent 40%);color:var(--text-primary);font-family:var(--font-body);font-size:15px;line-height:1.6;min-height:100vh;display:flex;overflow-x:hidden}#root{display:flex;width:100%;min-height:100vh}h1,h2,h3,h4,h5,h6{font-family:var(--font-display);font-weight:700;line-height:1.15;color:var(--text-primary);letter-spacing:-.01em}h1{font-size:3.2rem;font-weight:800}h2{font-size:2rem}h3{font-size:1.35rem}h4{font-size:1.05rem;font-family:var(--font-body);font-weight:600}ul,ol{list-style:none}a{text-decoration:none;color:inherit}button{font-family:var(--font-body);cursor:pointer;border:none;background:none;color:inherit}input,textarea{font-family:var(--font-body);color:var(--text-primary)}img{max-width:100%;display:block}@keyframes fadeInUp{0%{opacity:0;transform:translateY(24px)}to{opacity:1;transform:translateY(0)}}@keyframes fadeInScale{0%{opacity:0;transform:scale(.95)}to{opacity:1;transform:scale(1)}}@keyframes slideInLeft{0%{opacity:0;transform:translate(-20px)}to{opacity:1;transform:translate(0)}}@keyframes shimmer{0%{background-position:-200% 0}to{background-position:200% 0}}@keyframes float{0%,to{transform:translateY(0) rotate(0)}25%{transform:translateY(-12px) rotate(3deg)}75%{transform:translateY(8px) rotate(-2deg)}}@keyframes floatSlow{0%,to{transform:translateY(0)}50%{transform:translateY(-8px)}}@keyframes pulseRing{0%{transform:scale(.9);opacity:1}to{transform:scale(1.6);opacity:0}}@keyframes glowPulse{0%,to{opacity:1;box-shadow:0 0 12px var(--accent-glow-strong),0 0 24px var(--accent-glow)}50%{opacity:.7;box-shadow:0 0 8px var(--accent-glow),0 0 16px #4f46e514}}@keyframes countUp{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@keyframes pageEnter{0%{opacity:0;transform:translateY(16px)}to{opacity:1;transform:translateY(0)}}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes searchExpand{0%{width:90%;opacity:.8}to{width:100%;opacity:1}}@keyframes slideUp{0%{transform:translateY(100%)}to{transform:translateY(0)}}@keyframes toastIn{0%{transform:translate(110%);opacity:0}to{transform:translate(0);opacity:1}}@keyframes toastOut{0%{transform:translate(0);opacity:1}to{transform:translate(110%);opacity:0}}@keyframes floatUp{0%{transform:translateY(100%) rotate(0);opacity:0}10%{opacity:.12}90%{opacity:.12}to{transform:translateY(-100%) rotate(360deg);opacity:0}}@keyframes tipSlide{0%{opacity:0;transform:translate(20px)}to{opacity:1;transform:translate(0)}}@keyframes slideInRight{0%{opacity:0;transform:translate(30px)}to{opacity:1;transform:translate(0)}}@keyframes bounceIn{0%{opacity:0;transform:scale(.3)}50%{opacity:1;transform:scale(1.08)}70%{transform:scale(.95)}to{transform:scale(1)}}@keyframes gradientShift{0%{background-position:0% 50%}50%{background-position:100% 50%}to{background-position:0% 50%}}@keyframes borderGlow{0%{border-color:var(--accent);box-shadow:0 0 0 3px #4f46e514}50%{border-color:var(--teal);box-shadow:0 0 0 5px #0ea5e91a}to{border-color:var(--accent);box-shadow:0 0 0 3px #4f46e514}}@keyframes iconPop{0%{transform:scale(1)}40%{transform:scale(1.25) rotate(-8deg)}70%{transform:scale(.95) rotate(3deg)}to{transform:scale(1) rotate(0)}}@keyframes ripple{to{transform:scale(4);opacity:0}}@keyframes breathe{0%,to{opacity:.6}50%{opacity:1}}@keyframes morphBg{0%{border-radius:var(--radius-lg)}50%{border-radius:var(--radius-xl)}to{border-radius:var(--radius-lg)}}.gradient-text{background:linear-gradient(135deg,var(--accent),var(--teal),var(--emerald),var(--accent));background-size:300% 300%;-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;animation:gradientShift 6s ease infinite}.glass-panel{background:var(--surface);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border:1px solid var(--surface-border);border-radius:var(--radius-lg);padding:var(--space-5);box-shadow:var(--shadow-sm);transition:border-color var(--transition-base),box-shadow var(--transition-base),transform .4s var(--ease-out);animation:fadeInUp .5s var(--ease-out) backwards}.glass-panel:hover{border-color:var(--surface-border-hover);box-shadow:var(--shadow-md)}.glass-card{background:var(--surface-solid);border:1px solid var(--surface-border);border-radius:var(--radius-lg);padding:var(--space-5);box-shadow:var(--shadow-sm);transition:transform .4s var(--ease-spring),border-color var(--transition-base),box-shadow .4s var(--ease-out);will-change:transform}.glass-card:hover{transform:translateY(-8px) scale(1.02);border-color:var(--surface-border-hover);box-shadow:var(--shadow-card-hover)}.glass-card:active{transform:translateY(-2px) scale(.98);transition-duration:.1s}.primary-btn{background:linear-gradient(135deg,var(--accent),var(--accent-light));background-size:200% 200%;color:#fff;padding:.7rem 1.4rem;border-radius:var(--radius-sm);font-weight:600;font-size:.9rem;transition:transform .25s var(--ease-spring),box-shadow var(--transition-base),background-position .5s ease;display:inline-flex;align-items:center;gap:.5rem;letter-spacing:.01em}.primary-btn:hover{transform:translateY(-3px) scale(1.03);box-shadow:0 8px 25px #4f46e559;background-position:100% 100%}.primary-btn:active{transform:scale(.97)}.primary-btn{position:relative;overflow:hidden}.primary-btn:before{content:"";position:absolute;width:10px;height:10px;background:#fff6;border-radius:50%;transform:scale(0);opacity:0;pointer-events:none}.primary-btn:active:before{animation:ripple .5s ease-out}.secondary-btn{background:#4f46e50f;border:1px solid rgba(79,70,229,.15);color:var(--accent);padding:.6rem 1.2rem;border-radius:var(--radius-sm);font-weight:500;font-size:.9rem;transition:background var(--transition-fast),border-color var(--transition-fast),transform var(--transition-fast);display:inline-flex;align-items:center;gap:.5rem}.secondary-btn:hover{background:#4f46e51a;border-color:#4f46e540}.secondary-btn:active{transform:scale(.97)}.icon-btn{width:42px;height:42px;border-radius:50%;display:flex;align-items:center;justify-content:center;background:var(--surface-solid);border:1px solid var(--surface-border);color:var(--text-secondary);box-shadow:var(--shadow-xs);transition:background var(--transition-fast),color var(--transition-fast),transform var(--transition-fast),box-shadow var(--transition-fast)}.icon-btn:hover{background:var(--accent-glow);color:var(--accent);transform:scale(1.08);box-shadow:var(--shadow-sm)}.sidebar{width:var(--sidebar-width);background:var(--bg-secondary);border-right:1px solid var(--surface-border);display:flex;flex-direction:column;padding:var(--space-6) var(--space-5);position:fixed;height:100vh;z-index:100;overflow-y:auto;box-shadow:2px 0 12px #00000008;transition:transform .35s var(--ease-out)}.sidebar-logo{display:flex;align-items:center;gap:var(--space-3);margin-bottom:var(--space-7);padding-left:var(--space-2)}.sidebar-logo .logo-icon{width:44px;height:44px;background:linear-gradient(135deg,var(--accent),var(--teal));border-radius:var(--radius-md);display:flex;align-items:center;justify-content:center;color:#fff;font-size:1.2rem;box-shadow:0 4px 12px #4f46e540;animation:floatSlow 4s ease-in-out infinite}.sidebar-logo span{font-family:var(--font-display);font-size:1.6rem;font-weight:800;background:linear-gradient(135deg,var(--accent),var(--teal));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.nav-links{display:flex;flex-direction:column;gap:6px;flex-grow:1}.nav-link{display:flex;align-items:center;gap:var(--space-3);padding:.75rem 1rem;border-radius:var(--radius-md);color:var(--text-secondary);font-size:.92rem;font-weight:500;transition:all var(--transition-base);position:relative;cursor:pointer}.nav-link:hover{color:var(--accent);background:#4f46e50a}.nav-link.active{color:var(--accent);background:var(--accent-glow);font-weight:600;box-shadow:inset 0 0 20px #4f46e508}.nav-link.active:before{content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);width:3px;height:60%;background:linear-gradient(to bottom,var(--accent),var(--teal));border-radius:0 4px 4px 0;box-shadow:0 0 12px var(--accent-glow-strong),0 0 24px var(--accent-glow);animation:glowPulse 2.5s ease-in-out infinite}.nav-link i{width:20px;text-align:center;font-size:1rem;transition:transform .3s var(--ease-spring)}.nav-link:hover i{animation:iconPop .5s var(--ease-spring)}.mobile-menu-btn{display:none;position:fixed;top:16px;left:16px;z-index:200;width:44px;height:44px;border-radius:var(--radius-md);background:var(--surface-solid);border:1px solid var(--surface-border);box-shadow:var(--shadow-md);align-items:center;justify-content:center;color:var(--accent);font-size:1.2rem;cursor:pointer}.sidebar-overlay{display:none;position:fixed;top:0;right:0;bottom:0;left:0;background:#0000004d;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:99}.user-profile{display:flex;align-items:center;gap:var(--space-3);padding-top:var(--space-5);border-top:1px solid var(--surface-border)}.user-profile img{width:38px;height:38px;border-radius:50%;border:2px solid var(--surface-border)}.user-profile .user-name{font-weight:600;font-size:.88rem;display:block;color:var(--text-primary)}.user-profile .user-role{font-size:.78rem;color:var(--text-tertiary);display:block}.content-area{margin-left:var(--sidebar-width);flex-grow:1;padding:var(--space-6) var(--space-7);max-width:1100px;min-height:100vh}.top-bar{display:flex;justify-content:space-between;align-items:center;margin-bottom:var(--space-7)}.top-bar-greeting h3{font-family:var(--font-body);font-size:1.1rem;font-weight:600;color:var(--text-primary)}.top-bar-greeting p{font-size:.85rem;color:var(--text-secondary)}.top-bar-actions{display:flex;align-items:center;gap:var(--space-3)}.page-search-bar{background:var(--surface-solid);border:2px solid var(--surface-border);border-radius:var(--radius-pill);padding:.65rem 1.4rem;display:flex;align-items:center;gap:var(--space-3);width:100%;max-width:480px;margin-bottom:var(--space-5);box-shadow:var(--shadow-xs);transition:border-color var(--transition-base),box-shadow var(--transition-base),transform var(--transition-fast);animation:fadeInUp .4s var(--ease-out)}.page-search-bar:focus-within{border-color:var(--accent);box-shadow:0 0 0 4px #4f46e514,var(--shadow-sm);transform:scale(1.02);animation:borderGlow 3s ease-in-out infinite}.page-search-bar i{color:var(--accent);font-size:.95rem;flex-shrink:0}.page-search-bar input{background:none;border:none;outline:none;width:100%;font-size:.92rem;color:var(--text-primary)}.page-search-bar input::placeholder{color:var(--text-tertiary)}.empty-state{text-align:center;padding:var(--space-8) var(--space-5);color:var(--text-tertiary);animation:fadeInUp .4s var(--ease-out)}.empty-state i{font-size:3rem;margin-bottom:var(--space-4);color:var(--text-tertiary);opacity:.5}.empty-state p{font-size:1rem}.page{animation:pageEnter .5s var(--ease-out) forwards}.page-header{margin-bottom:var(--space-6)}.page-header h2{display:flex;align-items:center;gap:var(--space-3);margin-bottom:var(--space-2)}.page-header h2 i{color:var(--accent);font-size:1.4rem}.page-header p{color:var(--text-secondary);font-size:.95rem}.hero{text-align:center;margin-bottom:var(--space-7);padding:var(--space-8) 0 var(--space-7);position:relative;overflow:hidden;border-radius:var(--radius-xl);background:linear-gradient(135deg,#4f46e50d,#0ea5e90d,#10b98108)}.hero:after{content:"";position:absolute;bottom:-2px;left:-5%;width:110%;height:60px;background:var(--bg-primary);clip-path:polygon(0 60%,100% 0,100% 100%,0 100%)}.hero h1{margin-bottom:var(--space-4);position:relative;z-index:1}.hero-subtitle{color:var(--text-secondary);font-size:1.1rem;max-width:550px;margin:0 auto;position:relative;z-index:1}.hero-particles{position:absolute;top:0;right:0;bottom:0;left:0;pointer-events:none;overflow:hidden}.hero-particle{position:absolute;color:var(--accent);opacity:.1;animation:floatUp linear infinite}.stats-strip{display:grid;grid-template-columns:repeat(4,1fr);gap:var(--space-4);margin-bottom:var(--space-7)}.stat-card{background:var(--surface-solid);border:1px solid var(--surface-border);border-radius:var(--radius-lg);padding:var(--space-5);text-align:center;box-shadow:var(--shadow-xs);transition:transform var(--transition-base),box-shadow var(--transition-base);animation:fadeInUp .5s var(--ease-out) backwards}.stat-card:nth-child(1){animation-delay:.05s}.stat-card:nth-child(2){animation-delay:.1s}.stat-card:nth-child(3){animation-delay:.15s}.stat-card:nth-child(4){animation-delay:.2s}.stat-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-md)}.stat-icon{width:48px;height:48px;border-radius:var(--radius-md);display:flex;align-items:center;justify-content:center;margin:0 auto var(--space-3);font-size:1.3rem}.stat-icon.indigo{background:#4f46e51a;color:var(--accent)}.stat-icon.teal{background:#0ea5e91a;color:var(--teal)}.stat-icon.emerald{background:#10b9811a;color:var(--emerald)}.stat-icon.amber{background:#f59e0b1a;color:var(--amber)}.stat-value{font-family:var(--font-display);font-size:1.8rem;font-weight:800;color:var(--text-primary);display:block;animation:countUp .6s var(--ease-out) backwards}.stat-label{font-size:.82rem;color:var(--text-secondary);font-weight:500}.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--space-5);margin-bottom:var(--space-7)}.feature-card{text-align:center;padding:var(--space-7) var(--space-5);cursor:pointer;position:relative;overflow:hidden;animation:fadeInUp .5s var(--ease-out) backwards}.feature-card:nth-child(1){animation-delay:.1s}.feature-card:nth-child(2){animation-delay:.2s}.feature-card:nth-child(3){animation-delay:.3s}.feature-card:before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--accent),var(--teal),var(--emerald),var(--accent));background-size:300% 100%;opacity:0;transition:opacity var(--transition-base)}.feature-card:hover:before{opacity:1;animation:gradientShift 3s ease infinite}.feature-icon{font-size:2.5rem;margin-bottom:var(--space-4);background:linear-gradient(135deg,var(--accent),var(--teal));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;transition:transform .4s var(--ease-spring)}.feature-card:hover .feature-icon{animation:iconPop .5s var(--ease-spring)}.feature-card h3{margin-bottom:var(--space-3);font-size:1.2rem;transition:color var(--transition-base)}.feature-card:hover h3{color:var(--accent)}.feature-card p{color:var(--text-secondary);font-size:.88rem;line-height:1.55}.study-tip-banner{background:linear-gradient(135deg,#4f46e50f,#0ea5e90a);border:1px solid rgba(79,70,229,.1);border-radius:var(--radius-lg);padding:var(--space-5);display:flex;align-items:center;gap:var(--space-4);animation:tipSlide .6s var(--ease-out)}.study-tip-icon{width:48px;height:48px;border-radius:50%;background:linear-gradient(135deg,var(--accent),var(--teal));color:#fff;display:flex;align-items:center;justify-content:center;font-size:1.2rem;flex-shrink:0;animation:floatSlow 3s ease-in-out infinite}.study-tip-content{flex:1}.study-tip-content .tip-label{font-size:.72rem;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--accent);margin-bottom:var(--space-1)}.study-tip-content p{font-size:.92rem;color:var(--text-secondary);line-height:1.55}.layout-2col{display:grid;grid-template-columns:1.2fr .8fr;gap:var(--space-5)}.filter-pills{display:flex;gap:var(--space-2);margin-top:var(--space-4);flex-wrap:wrap}.filter-pill{padding:.4rem .85rem;border-radius:var(--radius-pill);background:#4f46e50a;border:1px solid rgba(79,70,229,.1);color:var(--text-secondary);font-size:.82rem;font-weight:500;transition:all .3s var(--ease-spring);cursor:pointer}.filter-pill:hover{background:#4f46e514;color:var(--accent);transform:translateY(-2px)}.filter-pill:active{transform:scale(.94)}.filter-pill.active{background:var(--accent);border-color:var(--accent);color:#fff;font-weight:600;box-shadow:0 4px 12px #4f46e540;animation:bounceIn .3s var(--ease-spring)}.email-list{display:flex;flex-direction:column;gap:var(--space-3);margin-top:var(--space-4)}.email-item{display:flex;align-items:flex-start;gap:var(--space-3);padding:var(--space-4);background:var(--bg-primary);border-radius:var(--radius-sm);cursor:pointer;transition:background .3s ease,transform .3s var(--ease-spring),box-shadow .3s ease;border-left:3px solid transparent;animation:slideInRight .4s var(--ease-out) backwards}.email-item:nth-child(1){animation-delay:.05s}.email-item:nth-child(2){animation-delay:.1s}.email-item:nth-child(3){animation-delay:.15s}.email-item:nth-child(4){animation-delay:.2s}.email-item:nth-child(5){animation-delay:.25s}.email-item:hover{background:#4f46e508;transform:translate(6px);box-shadow:var(--shadow-xs)}.email-item:hover .email-icon{animation:iconPop .4s var(--ease-spring)}.email-item.unread{border-left-color:var(--accent);background:#4f46e50a}.email-icon{width:42px;height:42px;border-radius:var(--radius-md);display:flex;align-items:center;justify-content:center;font-size:1.05rem;flex-shrink:0}.email-body{flex:1;min-width:0}.email-top-row{display:flex;align-items:center;justify-content:space-between;margin-bottom:4px}.tag{font-size:.62rem;font-weight:700;padding:.2rem .5rem;border-radius:6px;text-transform:uppercase;letter-spacing:.04em;white-space:nowrap;flex-shrink:0}.tag-urgent{background:#ef44441a;color:var(--danger)}.tag-java{background:#4f46e51a;color:var(--accent)}.tag-event{background:#10b9811a;color:var(--success)}.email-details h4,.email-body h4{font-family:var(--font-body);font-size:.95rem;font-weight:600;margin-bottom:2px}.email-details p,.email-body p{font-size:.83rem;color:var(--text-secondary);line-height:1.4}.email-time{font-size:.78rem;color:var(--text-tertiary);flex-shrink:0}.deadlines-stack{display:flex;flex-direction:column;gap:var(--space-3)}.deadline-card{display:flex;align-items:center;gap:var(--space-4);padding:var(--space-4);border-radius:var(--radius-sm);background:var(--bg-primary);border-left:4px solid transparent;transition:background .3s ease,transform .3s var(--ease-spring),box-shadow .3s ease;animation:slideInRight .4s var(--ease-out) backwards}.deadline-card:nth-child(1){animation-delay:.1s}.deadline-card:nth-child(2){animation-delay:.2s}.deadline-card:nth-child(3){animation-delay:.3s}.deadline-card:hover{background:#4f46e508;transform:translate(6px);box-shadow:var(--shadow-xs)}.deadline-card:hover .date-box{transform:scale(1.08);box-shadow:var(--shadow-sm)}.deadline-card.warning{border-left-color:var(--warning)}.deadline-card.danger{border-left-color:var(--danger)}.date-box{background:var(--surface-solid);border:1px solid var(--surface-border);border-radius:var(--radius-sm);padding:var(--space-2) var(--space-3);text-align:center;min-width:58px;box-shadow:var(--shadow-xs);transition:transform .3s var(--ease-spring),box-shadow .3s ease}.date-box .day{display:block;font-family:var(--font-display);font-size:1.3rem;font-weight:700;color:var(--accent)}.date-box .month{display:block;font-size:.7rem;color:var(--text-tertiary);text-transform:uppercase;letter-spacing:.06em}.subjects-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:var(--space-5)}.subject-card{text-align:center;cursor:pointer;padding:var(--space-6) var(--space-5);display:flex;flex-direction:column;align-items:center;gap:var(--space-3);position:relative;animation:fadeInUp .5s var(--ease-out) backwards}.subject-card:nth-child(1){animation-delay:.05s}.subject-card:nth-child(2){animation-delay:.1s}.subject-card:nth-child(3){animation-delay:.15s}.subject-card:nth-child(4){animation-delay:.2s}.subject-card:nth-child(5){animation-delay:.25s}.subject-card:nth-child(6){animation-delay:.3s}.subject-card i{background:linear-gradient(135deg,var(--accent),var(--teal));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.subject-card h4{font-family:var(--font-display);font-size:1.15rem}.subject-card p{font-size:.83rem;color:var(--text-secondary)}.favorite-btn{position:absolute;top:12px;right:12px;background:none;border:none;font-size:1.1rem;color:var(--text-tertiary);cursor:pointer;transition:color var(--transition-fast),transform var(--transition-fast);padding:4px;z-index:2}.favorite-btn:hover{transform:scale(1.2)}.favorite-btn.active{color:var(--amber)}.section-label{color:var(--text-secondary);font-size:.88rem;font-weight:500;margin-bottom:var(--space-5)}.detail-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:var(--space-6);flex-wrap:wrap;gap:var(--space-3)}.detail-title{font-size:1.6rem;color:var(--accent);display:flex;align-items:center;gap:var(--space-3)}.detail-actions{display:flex;align-items:center;gap:var(--space-3);flex-wrap:wrap}.import-btn{position:relative;overflow:hidden}.import-btn:after{content:"";position:absolute;top:0;right:0;bottom:0;left:0;background:linear-gradient(90deg,transparent,rgba(255,255,255,.2),transparent);transform:translate(-100%);transition:transform .5s}.import-btn:hover:after{transform:translate(100%)}.imported-badge{display:inline-block;font-size:.65rem;font-weight:700;letter-spacing:.06em;text-transform:uppercase;background:#10b9811f;color:var(--emerald);padding:.15rem .55rem;border-radius:var(--radius-pill);margin-left:auto}.lesson-card.imported{border-left:3px solid var(--emerald)}.lesson-card.imported .lesson-header{background:linear-gradient(135deg,#10b9810f,#0ea5e908)}.lessons-list{display:flex;flex-direction:column;gap:var(--space-5)}.lesson-card{background:var(--surface-solid);border:1px solid var(--surface-border);border-radius:var(--radius-lg);overflow:hidden;transition:border-color var(--transition-base),box-shadow var(--transition-base);box-shadow:var(--shadow-xs);animation:fadeInUp .5s var(--ease-out) backwards}.lesson-card:nth-child(1){animation-delay:.05s}.lesson-card:nth-child(2){animation-delay:.1s}.lesson-card:nth-child(3){animation-delay:.15s}.lesson-card:hover{border-color:#4f46e533;box-shadow:var(--shadow-md)}.lesson-header{background:linear-gradient(135deg,#4f46e50f,#0ea5e90a);padding:var(--space-5);font-family:var(--font-display);font-size:1.1rem;font-weight:600;color:var(--accent);border-bottom:1px solid var(--surface-border)}.lesson-body{padding:var(--space-5);display:flex;flex-direction:column;gap:var(--space-5)}.pdf-item{display:flex;align-items:center;gap:var(--space-3);padding:var(--space-3) var(--space-4);background:var(--bg-primary);border:1px solid var(--surface-border);border-radius:var(--radius-sm);transition:all var(--transition-fast)}.pdf-item:hover{background:#4f46e50a;border-color:#4f46e526}.pdf-item i{color:var(--danger);font-size:1.15rem}.pdf-item span{font-size:.88rem;flex-grow:1}.pdf-item small{color:var(--text-tertiary)}.summary-block{padding:var(--space-4);background:linear-gradient(135deg,#4f46e50a,#0ea5e905);border-left:3px solid var(--accent);border-radius:0 var(--radius-sm) var(--radius-sm) 0}.summary-label{font-size:.72rem;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--accent);margin-bottom:var(--space-2)}.summary-text{font-size:.9rem;color:var(--text-secondary);line-height:1.6}.lesson-actions{display:flex;gap:var(--space-3);align-items:center;flex-wrap:wrap;justify-content:space-between}.chat-btn{display:inline-flex;align-items:center;gap:.45rem;padding:.6rem 1.2rem;border-radius:var(--radius-sm);background:linear-gradient(135deg,#0ea5e91a,#4f46e514);border:1px solid rgba(14,165,233,.2);color:var(--teal);font-weight:600;font-size:.88rem;cursor:pointer;transition:all .3s var(--ease-spring);position:relative;overflow:hidden}.chat-btn:before{content:"";position:absolute;top:50%;left:50%;width:0;height:0;background:#0ea5e91a;border-radius:50%;transform:translate(-50%,-50%);transition:width .5s,height .5s}.chat-btn:hover{background:linear-gradient(135deg,#0ea5e92e,#4f46e524);border-color:#0ea5e959;transform:translateY(-2px) scale(1.03);box-shadow:0 6px 20px #0ea5e933}.chat-btn:hover:before{width:200px;height:200px}.chat-btn:active{transform:scale(.97)}.chat-btn i{font-size:1rem;animation:floatSlow 3s ease-in-out infinite}.theme-toggle{position:relative;transition:all .4s var(--ease-spring)!important}.theme-toggle i{transition:transform .5s var(--ease-spring),color .3s}.theme-toggle:hover i{transform:rotate(30deg) scale(1.15)}.theme-toggle.dark i{color:var(--amber)}.theme-toggle.dark:hover i{transform:rotate(-30deg) scale(1.15)}.quiz-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#0006;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);z-index:999;display:flex;align-items:center;justify-content:center;animation:fadeIn .25s var(--ease-out)}.quiz-modal{width:90%;max-width:580px;box-shadow:var(--shadow-lg);background:var(--surface-solid);animation:fadeInScale .35s var(--ease-spring)}.quiz-modal-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:var(--space-5)}.quiz-modal-header h3{display:flex;align-items:center;gap:var(--space-2)}.quiz-modal-header h3 i{color:var(--accent)}.quiz-status{font-size:.82rem;color:var(--text-tertiary);font-weight:600;margin-bottom:var(--space-2)}.question-text{font-family:var(--font-display);font-size:1.1rem;margin-bottom:var(--space-5);line-height:1.4}.options-container{display:flex;flex-direction:column;gap:var(--space-3)}.quiz-option{background:var(--bg-primary);border:1px solid var(--surface-border);padding:var(--space-4);border-radius:var(--radius-sm);text-align:left;font-size:.92rem;transition:all var(--transition-fast);color:var(--text-primary)}.quiz-option:hover:not(:disabled){background:#4f46e50f;border-color:#4f46e533;transform:translate(4px)}.quiz-option.correct{background:#10b9811a;border-color:var(--success)}.quiz-option.wrong{background:#ef44441a;border-color:var(--danger)}.quiz-option:disabled{cursor:not-allowed;opacity:.75}.quiz-feedback{margin-top:var(--space-4);font-weight:600;font-size:.9rem;display:flex;align-items:center;gap:var(--space-2)}.quiz-feedback.correct{color:var(--success)}.quiz-feedback.wrong{color:var(--danger)}.software-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:var(--space-4);margin-top:var(--space-4)}.software-card{background:var(--surface-solid);border:1px solid var(--surface-border);border-radius:var(--radius-md);padding:var(--space-5);text-align:center;display:flex;flex-direction:column;align-items:center;gap:var(--space-3);cursor:pointer;box-shadow:var(--shadow-xs);transition:all var(--transition-base);animation:fadeInUp .5s var(--ease-out) backwards}.software-card:nth-child(1){animation-delay:.05s}.software-card:nth-child(2){animation-delay:.1s}.software-card:nth-child(3){animation-delay:.15s}.software-card:hover{transform:translateY(-4px);border-color:var(--surface-border-hover);box-shadow:var(--shadow-card-hover)}.software-card i{color:var(--accent)}.setup-steps-list{margin-left:var(--space-5);display:flex;flex-direction:column;gap:var(--space-2);color:var(--text-secondary);font-size:.9rem;line-height:1.55;list-style:decimal}.setup-steps-list li::marker{color:var(--accent);font-weight:600}.video-card{display:flex;gap:var(--space-4);background:var(--bg-primary);border:1px solid var(--surface-border);border-radius:var(--radius-sm);padding:var(--space-2);cursor:pointer;transition:background var(--transition-fast),transform var(--transition-fast)}.video-card:hover{background:#4f46e50a;transform:translate(4px)}.video-thumb{width:110px;height:64px;background:linear-gradient(135deg,#4f46e514,#0ea5e914);border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;position:relative;color:var(--accent);flex-shrink:0}.video-thumb .duration{position:absolute;bottom:4px;right:4px;background:#000000b3;font-size:.62rem;padding:1px 5px;border-radius:3px;color:#fff}.video-info{display:flex;flex-direction:column;justify-content:center}.video-info h4{font-size:.9rem;margin-bottom:2px}.chat-window{display:flex;flex-direction:column;height:320px;margin-top:var(--space-4);background:var(--bg-primary);border:1px solid var(--surface-border);border-radius:var(--radius-sm);overflow:hidden}.chat-messages{flex-grow:1;padding:var(--space-4);overflow-y:auto;display:flex;flex-direction:column;gap:var(--space-3)}.message{max-width:85%;padding:var(--space-3) var(--space-4);border-radius:var(--radius-md);font-size:.88rem;line-height:1.5;animation:fadeInUp .3s var(--ease-out);white-space:pre-wrap}.message.bot{background:#4f46e50f;border:1px solid rgba(79,70,229,.1);align-self:flex-start;border-bottom-left-radius:4px;color:var(--text-primary)}.message.user{background:linear-gradient(135deg,var(--accent),var(--accent-light));color:#fff;align-self:flex-end;border-bottom-right-radius:4px;font-weight:500}.message.typing{display:flex;gap:4px;align-items:center;padding:var(--space-3) var(--space-4)}.typing-dot{width:8px;height:8px;border-radius:50%;background:var(--accent);opacity:.5;animation:typingBounce 1.4s infinite ease-in-out both}.typing-dot:nth-child(1){animation-delay:-.32s}.typing-dot:nth-child(2){animation-delay:-.16s}@keyframes typingBounce{0%,80%,to{transform:scale(.7);opacity:.4}40%{transform:scale(1);opacity:1}}.chat-input-area{display:flex;padding:var(--space-3);background:var(--surface-solid);border-top:1px solid var(--surface-border);gap:var(--space-2)}.chat-input-area input{flex-grow:1;background:var(--bg-primary);border:1px solid var(--surface-border);border-radius:var(--radius-pill);padding:0 var(--space-4);outline:none;font-size:.88rem;transition:border-color var(--transition-fast)}.chat-input-area input:focus{border-color:#4f46e54d}.chat-input-area button{padding:var(--space-2) var(--space-4)}.chat-input-area button:disabled{opacity:.5;cursor:not-allowed;transform:none!important}.chat-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#00000073;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);z-index:999;display:flex;align-items:center;justify-content:center;animation:fadeIn .25s var(--ease-out)}.chat-modal{width:92%;max-width:520px;max-height:85vh;display:flex;flex-direction:column;animation:fadeInScale .35s var(--ease-spring);overflow:hidden}.chat-modal-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:var(--space-3)}.chat-modal-title{display:flex;align-items:center;gap:var(--space-3)}.chat-modal-title h3{font-family:var(--font-body);font-size:1rem;font-weight:700;margin:0}.chat-avatar{width:42px;height:42px;border-radius:50%;background:linear-gradient(135deg,var(--accent),var(--teal));display:flex;align-items:center;justify-content:center;color:#fff;font-size:1.1rem;box-shadow:0 4px 12px #4f46e540;animation:floatSlow 3s ease-in-out infinite}.chat-status{font-size:.75rem;color:var(--emerald);display:flex;align-items:center;gap:4px}.status-dot{width:7px;height:7px;border-radius:50%;background:var(--emerald);display:inline-block;animation:breathe 2s ease-in-out infinite}.chat-context-badge{display:inline-flex;align-items:center;gap:6px;font-size:.78rem;font-weight:600;color:var(--accent);background:var(--accent-glow);padding:.35rem .8rem;border-radius:var(--radius-pill);margin-bottom:var(--space-3);border:1px solid rgba(79,70,229,.12);width:fit-content}.chat-context-badge i{font-size:.7rem}.chat-modal .chat-messages{height:350px;flex-grow:1;background:var(--bg-primary);border:1px solid var(--surface-border);border-radius:var(--radius-sm);margin-bottom:var(--space-3)}.chat-modal .chat-input-area{border-radius:var(--radius-sm);padding:var(--space-2);background:var(--bg-primary);border:1px solid var(--surface-border)}.chat-modal .chat-input-area input{height:42px}.toast-container{position:fixed;top:20px;right:20px;z-index:9999;display:flex;flex-direction:column;gap:10px;pointer-events:none}.toast{pointer-events:auto;background:var(--surface-solid);border:1px solid var(--surface-border);border-left:4px solid var(--accent);padding:var(--space-4) var(--space-5);border-radius:var(--radius-sm);box-shadow:var(--shadow-lg);display:flex;align-items:center;gap:var(--space-3);animation:toastIn .35s var(--ease-spring) forwards;min-width:300px}.toast.exiting{animation:toastOut .3s var(--ease-out) forwards}.toast.success{border-left-color:var(--success)}.toast.warning{border-left-color:var(--warning)}.toast.danger{border-left-color:var(--danger)}.toast.info{border-left-color:var(--info)}.toast-icon{font-size:1.3rem;flex-shrink:0}.toast.success .toast-icon{color:var(--success)}.toast.warning .toast-icon{color:var(--warning)}.toast.danger .toast-icon{color:var(--danger)}.toast.info .toast-icon{color:var(--info)}.toast-content h4{font-family:var(--font-body);font-size:.9rem;font-weight:600;margin-bottom:1px;color:var(--text-primary)}.toast-content p{font-size:.82rem;color:var(--text-secondary)}@media(max-width:1024px){.layout-2col{grid-template-columns:1fr}.card-grid,.stats-strip{grid-template-columns:repeat(2,1fr)}}@media(max-width:768px){.mobile-menu-btn{display:flex}.sidebar{transform:translate(-100%);box-shadow:none}.sidebar.open{transform:translate(0);box-shadow:4px 0 20px #0000001a}.sidebar-overlay.visible{display:block}.content-area{margin-left:0;padding:var(--space-4);padding-top:72px}.card-grid{grid-template-columns:1fr}.stats-strip{grid-template-columns:repeat(2,1fr)}h1{font-size:2rem}h2{font-size:1.5rem}.hero{padding:var(--space-6) var(--space-4) var(--space-5)}.page-search-bar{max-width:100%}.detail-header{flex-direction:column;align-items:flex-start}.top-bar{padding-left:52px}.subjects-grid{grid-template-columns:repeat(auto-fit,minmax(160px,1fr))}.quiz-modal{width:95%;margin:var(--space-4)}.study-tip-banner{flex-direction:column;text-align:center}.toast-container{top:auto;bottom:16px;left:12px;right:12px;z-index:150}.toast{min-width:auto;width:100%;padding:var(--space-3) var(--space-4);font-size:.85rem;border-radius:var(--radius-md)}.toast-icon{font-size:1rem}.toast-content h4{font-size:.82rem}.toast-content p{font-size:.72rem}}@media(max-width:480px){.stats-strip,.subjects-grid{grid-template-columns:1fr}h1{font-size:1.7rem}.feature-card{padding:var(--space-5) var(--space-4)}.stat-card{padding:var(--space-4)}.toast{padding:var(--space-2) var(--space-3)}.toast-content h4{font-size:.78rem}.toast-content p{font-size:.68rem}}