:root{font-family:Inter,Segoe UI,Roboto,sans-serif;color:#0f172a;background-color:#f8fafc}*{box-sizing:border-box}body{margin:0;background:#f1f5f9}.app-layout{display:flex;min-height:100vh}.app-layout.sidebar-collapsed .sidebar{width:74px}.app-layout.sidebar-collapsed .sidebar-caption,.app-layout.sidebar-collapsed .sidebar-nav-hint,.app-layout.sidebar-collapsed .sidebar-nav-label,.app-layout.sidebar-collapsed .sidebar-title,.app-layout.sidebar-collapsed .sidebar-microcopy,.app-layout.sidebar-collapsed .sidebar-user,.app-layout.sidebar-collapsed .sidebar-role{display:none}.app-layout.sidebar-collapsed .sidebar-brand{flex-direction:column;gap:10px;align-items:center}.app-layout.sidebar-collapsed .sidebar-collapse-btn{margin-left:0}.app-layout.sidebar-collapsed .sidebar-nav-item{justify-content:center;padding:12px 10px}.app-layout.sidebar-collapsed .sidebar-short{font-size:.85rem}.sidebar{width:290px;padding:26px 22px;background:linear-gradient(178deg,#0f172a,#1e1b4b 55%,#0f172a);color:#e2e8f0;display:flex;flex-direction:column;gap:26px;box-shadow:inset -1px 0 #ffffff0f;position:sticky;top:0;align-self:flex-start;min-height:100vh}.sidebar-brand{display:flex;align-items:center;gap:12px;position:relative}.sidebar-logo{height:42px;width:42px;border-radius:12px;display:grid;place-content:center;font-weight:800;color:#fff;background:linear-gradient(136deg,#22c55e,#0ea5e9);letter-spacing:-.03em}.sidebar-title{margin:0;font-weight:650;letter-spacing:-.02em;font-size:1.02rem}.sidebar-caption{margin:4px 0 0;color:#94a3b8;font-size:.75rem}.sidebar-collapse-btn{margin-left:auto;border:1px solid rgba(148,163,184,.35);background:#0f172aa6;color:#cbd5e1;width:34px;height:34px;border-radius:10px;cursor:pointer;font-size:1rem}.sidebar-nav{display:flex;flex-direction:column;gap:8px;flex:1}.sidebar-nav-item{text-decoration:none;color:#cbd5f5;padding:13px 14px;border-radius:13px;display:flex;align-items:center;gap:10px;transition:background .15s ease,color .15s ease;border:1px solid transparent}.sidebar-nav-item:hover{background:#ffffff0d;border-color:#ffffff0f}.sidebar-nav-active{background:linear-gradient(118deg,#6366f152,#0ea5e933);border-color:#6366f18c;color:#fff}.sidebar-nav-copy{display:flex;flex-direction:column;gap:2px}.sidebar-nav-label{font-weight:600;font-size:.95rem}.sidebar-nav-hint{font-size:.72rem;color:#94a3b8}.sidebar-auth,.sidebar-auth-mini{margin-top:auto;text-decoration:none;text-align:center;padding:10px 14px;border-radius:12px;font-weight:600;border:1px solid rgba(148,163,184,.4);color:#fff}.sidebar-auth-mini{padding:10px;letter-spacing:.06em}.sidebar-auth-active{background:#22c55e26;border-color:#34d39973}.sidebar-footer{font-size:.76rem;color:#94a3b8}.sidebar-user{margin:0;font-weight:650;color:#fff}.sidebar-role{margin:2px 0 10px;text-transform:capitalize}.sidebar-logout{width:100%;border-radius:10px;border:1px solid rgba(248,113,113,.4);background:transparent;color:#fca5a5;padding:8px 10px;font-weight:600;cursor:pointer}.sidebar-microcopy{line-height:1.5}.layout-main{flex:1;min-height:100vh;background:#f8fafc}.layout-content{max-width:1240px;margin:0 auto;padding:32px 24px 56px}.landing .hero{background:linear-gradient(140deg,#0f172a,#312e81);color:#fff;border-radius:24px;padding:44px;box-shadow:0 18px 40px #0f172a33}.landing h2{font-size:2rem;margin:10px 0}.landing p{color:#cbd5e1;max-width:720px}.eyebrow{color:#93c5fd;font-weight:700;text-transform:uppercase;letter-spacing:.08em;font-size:.75rem}.hero-actions{margin-top:24px;display:flex;gap:12px}.btn{display:inline-block;padding:10px 18px;border-radius:5px;text-decoration:none;font-weight:600;border:none;cursor:pointer;font-family:inherit;font-size:.9rem;transition:opacity .15s,background .15s}.btn-primary{background:#4f46e5;color:#fff}.btn-primary:hover{background:#4338ca}.btn-secondary{border:1px solid #cbd5e1;background:#fff;color:#475569}.btn-secondary:hover{background:#f8fafc}.btn-secondary-dark{border:1px solid #cbd5e1;background:#fff;color:#475569}.btn-secondary-dark:hover{background:#f1f5f9}.feature-grid{margin-top:30px;display:grid;gap:16px;grid-template-columns:repeat(auto-fit,minmax(230px,1fr))}.feature-card,.tech-stack{background:#fff;border:1px solid #e2e8f0;border-radius:8px;padding:20px}.feature-card p,.tech-stack p{color:#475569}.tech-stack{margin-top:16px}.metrics-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:14px;margin-bottom:18px}.sidebar-logout-compact{width:100%;border-radius:10px;border:1px solid rgba(248,113,113,.45);background:#0f172aa6;color:#fecaca;padding:10px 12px;font-weight:600;cursor:pointer}.dataset-banner{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;align-items:flex-start;background:#fff;border:1px solid #e2e8f0;border-radius:8px;padding:16px 20px;margin-bottom:16px}.dataset-pill{display:inline-flex;align-items:center;gap:6px;font-size:.72rem;text-transform:uppercase;letter-spacing:.12em;color:#4338ca;font-weight:700}.dataset-heading{margin:8px 0 4px;font-size:1.55rem}.dataset-caption{margin:0;color:#64748b;max-width:720px;line-height:1.55}.dataset-meta{display:flex;flex-direction:column;gap:6px;align-items:flex-end;color:#475569;font-size:.9rem;font-weight:600}.chart-card-head{display:flex;justify-content:space-between;align-items:flex-start;gap:14px;margin-bottom:8px}.chart-hint{margin:0;font-size:.84rem;color:#64748b;max-width:220px;text-align:right}.chart-empty{color:#64748b;font-weight:600;min-height:140px;display:grid;place-items:center;border:1px dashed #e2e8f0;border-radius:6px;margin-bottom:8px}.histogram-card,.scatter-card{margin-top:14px}.filter-card{background:#fff;border-radius:8px;border:1px solid #e2e8f0;padding:16px;margin-bottom:14px}.filter-grid{display:grid;gap:12px;grid-template-columns:repeat(auto-fit,minmax(180px,1fr))}.filter-grid label{display:grid;gap:8px;color:#334155;font-size:.92rem}.filter-grid input,.filter-grid select,.auth-card input{border:1px solid #cbd5e1;border-radius:5px;padding:9px 11px;font-family:inherit}.filter-actions{display:flex;align-items:end;gap:8px;flex-wrap:wrap}.metric-card{background:#fff;border-radius:8px;padding:18px;border:1px solid #e2e8f0}.metric-title{color:#64748b;margin:0}.metric-card h3{margin:8px 0 4px;font-size:1.6rem}.metric-helper{margin:0;color:#64748b;font-size:.86rem}.chart-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:14px}.chart-card,.table-card{background:#fff;border:1px solid #e2e8f0;border-radius:8px;padding:18px}.table-card{margin-top:14px}.table-wrap{overflow-x:auto}table{width:100%;border-collapse:collapse}th,td{border-bottom:1px solid #e2e8f0;padding:10px 8px;text-align:left;font-size:.93rem}.state-text{margin:24px 0;font-weight:600}.state-text.error{color:#dc2626}.auth-card{max-width:460px;margin:40px auto;border:1px solid #e2e8f0;border-radius:16px;padding:24px;background:#fff}.auth-card form{display:grid;gap:12px}.auth-card label{display:grid;gap:8px}@media(max-width:900px){.app-layout{flex-direction:column}.sidebar{position:relative;width:100%;min-height:unset;flex-direction:row;flex-wrap:wrap;gap:14px;padding:18px 18px 12px}.sidebar-nav{flex-direction:row;flex-wrap:wrap;width:100%}.sidebar-footer{width:100%}.layout-content{padding:20px 16px 40px}.landing .hero{padding:28px}.landing h2{font-size:1.45rem}}.ai-insights-card{border-left:4px solid #6366f1;margin-top:28px}.ai-insight-text{font-size:.97rem;line-height:1.65;color:#1e293b;margin:0 0 16px}.ai-insight-placeholder{font-size:.92rem;color:#94a3b8;margin:0 0 16px}.ai-insight-error{font-size:.88rem;color:#ef4444;margin:0 0 12px}.ai-generate-btn{align-self:flex-start}.infotip{position:relative;display:inline-flex;align-items:center;margin-left:6px;vertical-align:middle}.infotip-icon{width:15px;height:15px;border-radius:50%;background:#e2e8f0;color:#64748b;font-size:.68rem;font-weight:700;font-style:italic;display:inline-flex;align-items:center;justify-content:center;cursor:default;-webkit-user-select:none;user-select:none}.infotip-tooltip{display:none;position:absolute;bottom:calc(100% + 8px);left:50%;transform:translate(-50%);background:#1e293b;color:#f1f5f9;font-size:.76rem;line-height:1.5;padding:8px 12px;border-radius:5px;width:220px;white-space:normal;z-index:200;pointer-events:none;box-shadow:0 4px 14px #0000002e;font-style:normal;font-weight:400}.infotip:hover .infotip-tooltip{display:block}.dataset-info-row{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:14px;font-size:.86rem;color:#475569}.dataset-type-tag{background:#ede9fe;color:#4f46e5;font-size:.75rem;font-weight:700;padding:2px 9px;border-radius:3px;text-transform:uppercase;letter-spacing:.04em}.dataset-info-sep{color:#cbd5e1}.dataset-info-hint{font-size:.8rem;color:#94a3b8;font-style:italic}.dataset-edx-stats{display:flex;gap:16px;flex-wrap:wrap;font-size:.82rem;color:#475569;font-weight:600;margin-left:auto}.ai-provider-toggle{display:flex;gap:6px}.ai-toggle-btn{padding:4px 12px;border-radius:4px;border:1px solid #4f46e5;background:transparent;color:#6366f1;font-size:.82rem;font-weight:600;cursor:pointer;transition:background .15s,color .15s}.ai-toggle-btn.active{background:#4f46e5;border-color:#4f46e5;color:#fff}.ai-toggle-btn:hover:not(.active){background:#f5f3ff;color:#4f46e5}.dataset-selector-bar{display:flex;align-items:center;gap:10px;background:#fff;border:1px solid #e2e8f0;border-radius:6px;padding:9px 14px;margin-bottom:14px;flex-wrap:wrap}.dataset-selector-label{font-size:.85rem;color:#64748b;font-weight:600}.dataset-selector-name{font-weight:700;font-size:.95rem;flex:1}.heatmap-wrap{overflow-x:auto;padding-bottom:8px}.heatmap-months{display:grid;grid-auto-flow:column;font-size:.72rem;color:#94a3b8;padding-left:2px;margin-bottom:4px}.heatmap-grid{display:grid;grid-template-rows:repeat(7,12px);grid-auto-flow:column;gap:2px;width:fit-content}.heatmap-cell{width:12px;height:12px;border-radius:2px}.hm-0{background:#f1f5f9}.hm-1{background:#c7d2fe}.hm-2{background:#818cf8}.hm-3{background:#4f46e5}.hm-4{background:#3730a3}.heatmap-legend{display:flex;align-items:center;gap:4px;margin-top:8px;font-size:.75rem;color:#94a3b8}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#0006;display:flex;align-items:center;justify-content:center;z-index:100}.modal-box{background:#fff;border-radius:8px;padding:24px;width:min(560px,95vw);max-height:85vh;overflow-y:auto;display:flex;flex-direction:column;gap:16px}.modal-head{display:flex;justify-content:space-between;align-items:center}.modal-head h3{margin:0}.modal-close{background:none;border:none;font-size:1.2rem;cursor:pointer;color:#64748b}.dm-section-label{font-size:.78rem;font-weight:700;text-transform:uppercase;letter-spacing:.1em;color:#94a3b8;margin:0 0 6px}.dm-list{display:flex;flex-direction:column;gap:6px}.dm-row{display:flex;align-items:center;gap:6px;border:1px solid #e2e8f0;border-radius:6px;padding:8px 10px}.dm-row.dm-active{border-color:#4f46e5;background:#f5f3ff}.dm-select-btn{flex:1;background:none;border:none;text-align:left;cursor:pointer;display:flex;flex-direction:column;gap:2px}.dm-name{font-weight:600;font-size:.9rem}.dm-meta{font-size:.78rem;color:#94a3b8}.dm-delete-btn{background:none;border:none;color:#ef4444;cursor:pointer;font-size:.85rem;padding:4px 8px}.dm-tabs{display:flex;gap:6px}.dm-tab{flex:1;padding:8px;border:1px solid #e2e8f0;border-radius:5px;background:none;cursor:pointer;font-size:.88rem;font-weight:600;color:#64748b;font-family:inherit}.dm-tab.active{background:#4f46e5;color:#fff;border-color:#4f46e5}.dm-form{display:flex;flex-direction:column;gap:10px}.dm-form input{border:1px solid #cbd5e1;border-radius:5px;padding:9px 12px;font-size:.93rem;font-family:inherit}.dm-msg{font-size:.88rem;color:#22c55e;margin:0}.badge-ml{font-size:.72rem;font-weight:700;padding:2px 8px;border-radius:20px;background:#dcfce7;color:#166534;margin-left:8px}.risk-pill{padding:2px 10px;border-radius:20px;font-size:.82rem;font-weight:700}.link-btn{background:none;border:none;color:#4f46e5;font-weight:600;cursor:pointer;padding:0;text-decoration:underline;font-size:.93rem}.profile-page{display:flex;flex-direction:column;gap:20px}.back-btn{width:fit-content;margin-bottom:4px}.profile-header{display:flex;align-items:center;gap:16px;background:#fff;border:1px solid #e2e8f0;border-radius:16px;padding:20px}.profile-avatar{width:52px;height:52px;background:#6366f1;color:#fff;border-radius:50%;display:grid;place-items:center;font-size:1.2rem;font-weight:800;flex-shrink:0}.profile-id{margin:0;font-size:1.3rem}.profile-courses{margin:4px 0 0;color:#64748b;font-size:.88rem}.profile-risk-badge{margin-left:auto;padding:6px 16px;border-radius:20px;color:#fff;font-weight:700;font-size:.9rem}.page-title{font-size:1.5rem;font-weight:800;margin:0 0 20px}.comparison-page{display:flex;flex-direction:column;gap:20px}.cmp-selectors{display:flex;align-items:center;gap:12px;flex-wrap:wrap}.cmp-selectors select{border:1px solid #cbd5e1;border-radius:10px;padding:10px 14px;font-size:.93rem;min-width:160px}.cmp-vs{font-weight:800;color:#6366f1}.cmp-table-wrap{background:#fff;border:1px solid #e2e8f0;border-radius:16px;overflow-x:auto;padding:16px}.cmp-table{width:100%;border-collapse:collapse}.cmp-table th{background:#f8fafc;font-size:.85rem;text-transform:uppercase;letter-spacing:.08em;color:#475569}.cmp-table th,.cmp-table td{padding:10px 14px;border-bottom:1px solid #f1f5f9;text-align:center}.cmp-label{font-weight:700;color:#334155;background:#f8fafc}.cmp-cell{font-size:.95rem}.cmp-winner{background:#f0fdf4;color:#166534;font-weight:700}.lp-root{min-height:100vh;background:#fff;color:#0f172a;font-family:Inter,Segoe UI,Roboto,sans-serif}.lp-nav{position:sticky;top:0;z-index:50;background:#ffffffeb;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-bottom:1px solid #e2e8f0}.lp-nav-inner{max-width:1200px;margin:0 auto;padding:0 32px;height:60px;display:flex;align-items:center;gap:32px}.lp-logo{font-size:1.35rem;font-weight:900;color:#0f172a;letter-spacing:-.02em}.lp-logo-dot{color:#4f46e5}.lp-logo-img{height:48px;width:auto;object-fit:contain;display:block}.lp-logo-img-sm{height:36px}.lp-nav-links{display:flex;gap:28px;flex:1}.lp-nav-link{color:#64748b;text-decoration:none;font-size:.9rem;font-weight:500;transition:color .15s}.lp-nav-link:hover{color:#0f172a}.lp-nav-cta{background:#4f46e5;color:#fff;padding:8px 18px;border-radius:5px;text-decoration:none;font-size:.88rem;font-weight:700;white-space:nowrap;transition:background .15s}.lp-nav-cta:hover{background:#4338ca}.lp-hero{position:relative;overflow:hidden;padding:100px 32px 0;text-align:center;background:#fafafe;border-bottom:1px solid #e2e8f0}.lp-hero-glow{display:none}.lp-hero-inner{position:relative;max-width:800px;margin:0 auto}.lp-eyebrow{display:inline-block;font-size:.75rem;font-weight:700;text-transform:uppercase;letter-spacing:.14em;color:#4f46e5;background:#ede9fe;border:1px solid #c7d2fe;padding:3px 12px;border-radius:3px;margin-bottom:22px}.lp-hero-title{font-size:clamp(2.2rem,5.5vw,3.6rem);font-weight:900;line-height:1.1;letter-spacing:-.03em;color:#0f172a;margin:0 0 22px}.lp-hero-accent{color:#4f46e5;-webkit-text-fill-color:#4f46e5;background:none}.lp-hero-sub{font-size:1.05rem;color:#475569;line-height:1.7;margin:0 0 34px}.lp-hero-actions{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin-bottom:72px}.lp-btn-primary{background:#4f46e5;color:#fff;padding:11px 26px;border-radius:5px;text-decoration:none;font-weight:700;font-size:.95rem;transition:background .15s;display:inline-block}.lp-btn-primary:hover{background:#4338ca}.lp-btn-lg{padding:13px 36px;font-size:1rem}.lp-btn-ghost{color:#475569;padding:11px 22px;border-radius:5px;border:1px solid #e2e8f0;text-decoration:none;font-weight:600;font-size:.95rem;transition:border-color .15s,color .15s;display:inline-block}.lp-btn-ghost:hover{border-color:#4f46e5;color:#4f46e5}.lp-stats{display:flex;justify-content:center;gap:0;border-top:1px solid #e2e8f0;max-width:700px;margin:0 auto}.lp-stat{flex:1;padding:26px 16px;display:flex;flex-direction:column;align-items:center;gap:4px;border-right:1px solid #e2e8f0}.lp-stat:last-child{border-right:none}.lp-stat-value{font-size:1.6rem;font-weight:900;color:#0f172a}.lp-stat-label{font-size:.78rem;color:#64748b;text-transform:uppercase;letter-spacing:.1em}.lp-section{padding:88px 32px}.lp-section-alt{background:#f8fafc;border-top:1px solid #e2e8f0;border-bottom:1px solid #e2e8f0}.lp-section-inner{max-width:1200px;margin:0 auto}.lp-section-eyebrow{font-size:.75rem;font-weight:700;text-transform:uppercase;letter-spacing:.14em;color:#4f46e5;margin:0 0 12px}.lp-section-title{font-size:clamp(1.5rem,3.2vw,2.1rem);font-weight:800;color:#0f172a;margin:0 0 44px;letter-spacing:-.02em;max-width:600px}.lp-features-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(290px,1fr));gap:14px}.lp-feature-card{background:#fff;border:1px solid #e2e8f0;border-radius:8px;padding:22px;transition:border-color .2s,box-shadow .2s}.lp-feature-card:hover{border-color:#a5b4fc;box-shadow:0 2px 12px #4f46e512}.lp-feature-icon{font-size:1.5rem;display:block;margin-bottom:12px}.lp-feature-title{font-size:.97rem;font-weight:700;color:#0f172a;margin:0 0 7px}.lp-feature-desc{font-size:.87rem;color:#64748b;line-height:1.6;margin:0}.lp-steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:32px}.lp-step{display:flex;gap:20px;align-items:flex-start}.lp-step-num{font-size:2rem;font-weight:900;color:#c7d2fe;line-height:1;flex-shrink:0;width:52px}.lp-step-title{font-size:.97rem;font-weight:700;color:#0f172a;margin:0 0 6px}.lp-step-body{font-size:.87rem;color:#64748b;line-height:1.6;margin:0}.lp-tech-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(190px,1fr));gap:10px}.lp-tech-card{background:#fff;border:1px solid #e2e8f0;border-radius:6px;padding:14px 18px;display:flex;align-items:center;gap:12px}.lp-tech-dot{width:9px;height:9px;border-radius:50%;flex-shrink:0}.lp-tech-name{font-size:.92rem;font-weight:700;color:#0f172a;margin:0 0 2px}.lp-tech-role{font-size:.77rem;color:#64748b;margin:0}.lp-cta-banner{background:#f5f3ff;border-top:1px solid #e0e7ff;border-bottom:1px solid #e0e7ff;padding:72px 32px;text-align:center}.lp-cta-inner{max-width:540px;margin:0 auto}.lp-cta-title{font-size:clamp(1.4rem,3vw,1.9rem);font-weight:800;color:#0f172a;margin:0 0 10px}.lp-cta-sub{color:#4f46e5;margin:0 0 28px;font-size:.97rem}.lp-footer{background:#f8fafc;border-top:1px solid #e2e8f0;padding:28px 32px;display:flex;align-items:center;gap:24px;flex-wrap:wrap;max-width:100%}.lp-footer-copy{color:#94a3b8;font-size:.84rem;flex:1;margin:0}.lp-footer-links{display:flex;gap:20px}.lp-footer-link{color:#64748b;text-decoration:none;font-size:.84rem;transition:color .15s}.lp-footer-link:hover{color:#4f46e5}@media(max-width:640px){.lp-nav-links{display:none}.lp-hero{padding:72px 20px 0}.lp-section{padding:60px 20px}.lp-stats{flex-wrap:wrap}.lp-stat{min-width:45%}.lp-footer{flex-direction:column;text-align:center}}.compat-badge{font-size:.8rem;padding:6px 10px;border-radius:8px;margin-top:6px;line-height:1.45}.dm-compat-pill{display:inline-block;font-size:.7rem;font-weight:700;padding:1px 7px;border-radius:20px;margin-top:3px;text-transform:uppercase}.dm-hint{font-size:.8rem;color:#94a3b8;margin:0}.dm-kaggle-guide{display:flex;flex-direction:column;gap:10px}.dm-guide-step{margin:0;font-size:.9rem;display:flex;align-items:baseline;gap:10px}.dm-step-num{background:#6366f1;color:#fff;font-weight:700;font-size:.75rem;width:20px;height:20px;border-radius:50%;display:grid;place-items:center;flex-shrink:0}.auth-page{min-height:100vh;background:#f1f5f9;display:flex;align-items:center;justify-content:center;padding:32px 16px}.auth-bg-glow{display:none}.auth-container{width:100%;max-width:420px;display:flex;flex-direction:column;align-items:center;gap:20px}.auth-brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:#1e293b}.auth-brand-logo{width:36px;height:36px;background:#4f46e5;border-radius:8px;display:grid;place-content:center;font-weight:800;font-size:.82rem;color:#fff}.auth-brand-name{font-size:1rem;font-weight:700;letter-spacing:-.02em}.auth-card{width:100%;background:#fff;border:1px solid #e2e8f0;border-radius:10px;overflow:hidden;box-shadow:0 2px 12px #0000000f}.auth-tabs{display:flex;border-bottom:1px solid #e2e8f0}.auth-tab{flex:1;padding:13px;background:none;border:none;color:#94a3b8;font-size:.9rem;font-weight:600;cursor:pointer;transition:color .15s,background .15s;font-family:inherit}.auth-tab:hover{color:#475569;background:#f8fafc}.auth-tab-active{color:#4f46e5;border-bottom:2px solid #4f46e5;background:#fafafe}.auth-form{display:flex;flex-direction:column;gap:14px;padding:24px 22px}.auth-field{display:flex;flex-direction:column;gap:5px}.auth-label{font-size:.8rem;font-weight:600;color:#64748b;text-transform:uppercase;letter-spacing:.04em}.auth-optional{font-weight:400;text-transform:none;letter-spacing:0;color:#94a3b8}.auth-input{background:#f8fafc;border:1px solid #e2e8f0;border-radius:5px;padding:9px 13px;color:#1e293b;font-size:.92rem;outline:none;transition:border-color .15s;font-family:inherit}.auth-input:focus{border-color:#4f46e5;background:#fff}.auth-select{-webkit-appearance:none;-moz-appearance:none;appearance:none}.auth-error{margin:0;color:#dc2626;font-size:.84rem;background:#fef2f2;border:1px solid #fecaca;border-radius:5px;padding:8px 12px}.auth-success{margin:0;color:#16a34a;font-size:.84rem;background:#f0fdf4;border:1px solid #bbf7d0;border-radius:5px;padding:8px 12px}.auth-submit{width:100%;padding:11px;border:none;border-radius:5px;background:#4f46e5;color:#fff;font-weight:700;font-size:.93rem;cursor:pointer;margin-top:4px;transition:background .15s;font-family:inherit}.auth-submit:disabled{opacity:.55;cursor:not-allowed}.auth-submit:hover:not(:disabled){background:#4338ca}.auth-switch-link{background:none;border:none;color:#4f46e5;font-size:.88rem;font-weight:600;cursor:pointer;text-align:center;padding:4px 0;font-family:inherit}.auth-switch-link:hover{color:#4338ca}.auth-footer-note{font-size:.78rem;color:#94a3b8;text-align:center;margin:0}.auth-footer-note code{background:#f1f5f9;border-radius:3px;padding:1px 5px;color:#475569;font-size:.75rem}.admin-page{padding:32px 36px;max-width:1060px}.admin-header{display:flex;align-items:flex-start;justify-content:space-between;gap:16px;margin-bottom:28px}.admin-title{margin:0 0 4px;font-size:1.5rem;font-weight:800;letter-spacing:-.03em;color:#0f172a}.admin-subtitle{margin:0;color:#64748b;font-size:.88rem}.admin-section-title{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-bottom:12px;font-size:.82rem;font-weight:700;text-transform:uppercase;letter-spacing:.06em;color:#64748b}.view-row{display:flex;align-items:center;gap:12px;padding:8px 0;border-bottom:1px solid #f1f5f9}.view-row:last-of-type{border-bottom:none}.view-label{font-size:.8rem;font-weight:600;color:#94a3b8;width:90px;flex-shrink:0;text-transform:uppercase;letter-spacing:.04em}.view-value{font-size:.92rem;color:#1e293b}.admin-tabs{display:flex;gap:4px;border-bottom:2px solid #e2e8f0;margin-bottom:28px}.admin-tab{padding:10px 18px;background:none;border:none;font-size:.9rem;font-weight:600;color:#64748b;cursor:pointer;border-bottom:2px solid transparent;margin-bottom:-2px;transition:color .15s,border-color .15s;font-family:inherit}.admin-tab:hover{color:#1e293b}.admin-tab-active{color:#4f46e5;border-bottom-color:#4f46e5}.admin-section-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px;flex-wrap:wrap;gap:12px}.admin-count{color:#64748b;font-size:.88rem}.admin-loading,.admin-empty{color:#94a3b8;font-size:.9rem;padding:16px 0}.admin-error{color:#dc2626;font-size:.88rem;background:#fef2f2;border:1px solid #fecaca;border-radius:8px;padding:8px 14px;margin-bottom:12px}.admin-table-wrap{overflow-x:auto}.admin-table{width:100%;border-collapse:collapse;font-size:.9rem}.admin-table th{text-align:left;padding:10px 14px;font-size:.78rem;font-weight:700;text-transform:uppercase;letter-spacing:.05em;color:#64748b;border-bottom:2px solid #e2e8f0;background:#f8fafc}.admin-table td{padding:11px 14px;border-bottom:1px solid #f1f5f9;color:#1e293b;vertical-align:middle}.admin-table tr:hover td{background:#f8fafc}.admin-td-user{font-weight:600}.admin-td-source{color:#94a3b8;font-size:.82rem}.admin-td-date{color:#64748b;font-size:.85rem}.admin-td-actions{display:flex;gap:12px;align-items:center}.role-badge{display:inline-block;font-size:.73rem;font-weight:700;padding:2px 8px;border-radius:3px;text-transform:capitalize}.role-admin{background:#ede9fe;color:#6d28d9}.role-instructor{background:#e0f2fe;color:#0369a1}.status-badge{display:inline-block;font-size:.73rem;font-weight:700;padding:2px 8px;border-radius:3px;text-transform:capitalize}.status-pending{background:#fef9c3;color:#854d0e}.status-approved{background:#dcfce7;color:#166534}.status-declined{background:#fee2e2;color:#991b1b}.admin-builtin-tag{font-size:.72rem;color:#94a3b8;font-style:italic}.admin-td-dim{color:#94a3b8;font-size:.84rem}.admin-pending-badge{display:inline-block;margin-left:8px;background:#fef9c3;color:#854d0e;font-size:.72rem;font-weight:700;padding:1px 7px;border-radius:3px}.admin-row-pending td{background:#fffbeb}.status-active{background:#dcfce7;color:#166534}.btn-link{background:none;border:none;font-size:.85rem;font-weight:600;cursor:pointer;padding:0;color:#6366f1;font-family:inherit;transition:color .15s}.btn-link:hover{color:#4f46e5}.btn-link-danger{color:#dc2626}.btn-link-danger:hover{color:#b91c1c}.btn-link-success{color:#16a34a}.btn-link-success:hover{color:#15803d}.btn-link:disabled,.btn-link-danger:disabled,.btn-link-success:disabled{opacity:.45;cursor:not-allowed}.admin-filter-group{display:flex;gap:6px;flex-wrap:wrap}.admin-filter-btn{padding:5px 13px;font-size:.82rem;font-weight:600;border-radius:4px;border:1px solid #e2e8f0;background:#fff;color:#64748b;cursor:pointer;transition:all .15s;font-family:inherit}.admin-filter-btn:hover{border-color:#4f46e5;color:#4f46e5}.admin-filter-active{background:#4f46e5;color:#fff;border-color:#4f46e5}.modal-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;background:#0f172a73;display:flex;align-items:center;justify-content:center;z-index:1000;padding:16px}.modal-box{background:#fff;border-radius:8px;width:100%;max-width:400px;box-shadow:0 8px 32px #00000024;overflow:hidden}.modal-header{display:flex;align-items:center;justify-content:space-between;padding:18px 22px 0}.modal-header h3{margin:0;font-size:1.05rem;font-weight:700;color:#0f172a}.modal-close{background:none;border:none;color:#94a3b8;font-size:1.1rem;cursor:pointer;line-height:1;padding:4px}.modal-close:hover{color:#1e293b}.modal-form{display:flex;flex-direction:column;gap:14px;padding:18px 22px 22px}.modal-label{display:flex;flex-direction:column;gap:5px;font-size:.82rem;font-weight:600;color:#475569;font-family:inherit}.modal-input{border:1px solid #e2e8f0;border-radius:5px;padding:9px 12px;font-size:.92rem;color:#1e293b;outline:none;transition:border-color .15s;font-family:inherit;background:#f8fafc}.modal-input:focus{border-color:#4f46e5;background:#fff}.modal-actions{display:flex;gap:10px;justify-content:flex-end;margin-top:4px}.btn-sm{padding:6px 14px;font-size:.82rem}.sidebar-nav-admin{border-color:#6366f126!important}.btn-ghost{padding:9px 16px;border-radius:5px;border:1px solid #e2e8f0;background:#f8fafc;color:#475569;font-weight:600;font-size:.88rem;cursor:pointer;transition:border-color .15s,color .15s;font-family:inherit}.btn-ghost:hover{border-color:#94a3b8;color:#1e293b}