:root{--color-primary:#4f46e5;--color-primary-hover:#4338ca;--color-bg:#f8fafc;--color-surface:#fff;--color-border:#e2e8f0;--color-text:#1e293b;--color-text-muted:#64748b;--color-danger:#dc2626;--color-warning:#f59e0b;--color-success:#16a34a;--radius:10px;--shadow:0 1px 3px #0000000f, 0 1px 2px #0000000a}*{box-sizing:border-box}body{background:var(--color-bg);color:var(--color-text);margin:0;font-family:Segoe UI,system-ui,-apple-system,sans-serif}h1,h2,h3{margin-top:0;font-weight:600}a{color:var(--color-primary);text-decoration:none}a:hover{text-decoration:underline}.page-container{max-width:900px;margin:0 auto;padding:0 20px 60px}.navbar{z-index:50;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-bottom:1px solid var(--color-border);background:#ffffffd9;justify-content:space-between;align-items:center;margin-bottom:28px;padding:12px 24px;display:flex;position:sticky;top:0}.navbar-brand{color:var(--color-primary);letter-spacing:-.02em;font-size:17px;font-weight:800}.navbar-toggle{color:var(--color-text);background:0 0;border:none;border-radius:8px;padding:6px;display:none}.navbar-toggle:hover{background:var(--color-bg)}.navbar-links{align-items:center;gap:4px;display:flex}.navbar-icon-link{color:var(--color-text-muted);border-radius:10px;align-items:center;gap:8px;padding:9px;transition:background .15s,color .15s,transform .12s;display:flex;position:relative}.navbar-icon-link:hover{background:var(--color-bg);color:var(--color-primary);text-decoration:none;transform:translateY(-1px)}.navbar-link-active{color:var(--color-primary);background:#eef2ff}.navbar-icon-link:after{content:attr(data-tooltip);color:#fff;white-space:nowrap;opacity:0;pointer-events:none;background:#1e293b;border-radius:6px;padding:4px 8px;font-size:11px;font-weight:500;transition:opacity .15s,transform 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var(--color-border)}.navbar-logout{color:var(--color-text-muted);background:0 0;border:none;border-radius:10px;padding:7px;display:flex;position:relative}.navbar-logout:hover{color:var(--color-danger);background:#fef2f2}.navbar-logout:after{content:attr(data-tooltip);color:#fff;white-space:nowrap;opacity:0;pointer-events:none;background:#1e293b;border-radius:6px;padding:4px 8px;font-size:11px;transition:opacity .15s;position:absolute;top:120%;right:0}.navbar-logout:hover:after{opacity:1}.read-panel{border:1px solid var(--color-border);background:var(--color-surface);border-radius:12px;overflow:hidden}.read-panel-header{cursor:pointer;width:100%;color:var(--color-text);background:0 0;border:none;justify-content:space-between;align-items:center;padding:12px 16px;display:flex}.read-panel-header:hover{background:var(--color-bg)}.read-panel-title{align-items:center;gap:8px;font-size:14px;font-weight:500;display:flex}.read-panel-right{align-items:center;gap:8px;display:flex}.read-progress-track{background:var(--color-border);border-radius:999px;width:60px;height:6px;overflow:hidden}.read-progress-fill{background:var(--color-success);border-radius:999px;height:100%;transition:width .3s}.read-percent{color:var(--color-text-muted);width:32px;font-size:12px;font-weight:600}.read-panel-body{border-top:1px solid var(--color-border);padding:4px 16px 16px}.read-group{margin-top:12px}.read-group-label{color:var(--color-success);text-transform:uppercase;letter-spacing:.02em;align-items:center;gap:5px;margin:0 0 6px;font-size:12px;font-weight:600;display:flex}.read-group-label-muted{color:var(--color-text-muted)}.read-name-list{margin:0;padding:0;list-style:none}.read-name-list li{border-bottom:1px solid #f1f5f9;justify-content:space-between;padding:6px 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0;border:none;border-radius:8px;padding:6px;position:absolute;top:14px;right:14px}.onboarding-skip:hover{background:var(--color-bg)}.onboarding-icon{width:56px;height:56px;color:var(--color-primary);background:#eef2ff;border-radius:16px;justify-content:center;align-items:center;margin:0 auto 16px;display:flex}.onboarding-title{margin:0 0 8px;font-size:19px}.onboarding-text{color:var(--color-text-muted);margin:0 0 20px;font-size:14px;line-height:1.5}.onboarding-dots{justify-content:center;gap:6px;margin-bottom:22px;display:flex}.onboarding-dot{background:var(--color-border);border-radius:50%;width:6px;height:6px;transition:background .2s,width .2s}.onboarding-dot-active{background:var(--color-primary);border-radius:3px;width:18px}.onboarding-actions{justify-content:center;align-items:center;gap:16px;display:flex}.onboarding-skip-link{color:var(--color-text-muted);background:0 0;border:none;font-size:14px;font-weight:500}.onboarding-skip-link:hover{color:var(--color-text)}.search-bar{background:var(--color-surface);border:1px solid var(--color-border);color:var(--color-text-muted);border-radius:10px;align-items:center;gap:8px;margin-bottom:20px;padding:10px 14px;display:flex}.search-bar input{border:none;flex:1;padding:0}.search-bar input:focus{outline:none}.students-grid{grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:14px;display:grid}.student-card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:14px;padding:16px;transition:transform .15s,box-shadow .15s}.student-card:hover{transform:translateY(-2px);box-shadow:0 4px 12px 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12px}.student-stat{justify-content:space-between;align-items:center;margin-bottom:6px;display:flex}.student-stat-label{color:var(--color-text-muted);font-size:12px}.student-stat-value{font-size:13px;font-weight:700}.student-stat-sub{color:var(--color-text-muted);margin:6px 0 0;font-size:11px}.student-joined{color:var(--color-text-muted);align-items:center;gap:4px;margin:0;font-size:11px;display:flex}@media (width<=768px){.navbar-toggle{display:flex}.navbar-links{background:var(--color-surface);border-bottom:1px solid var(--color-border);opacity:0;flex-direction:column;align-items:stretch;gap:2px;max-height:0;padding:10px;transition:max-height .25s,opacity .2s;position:fixed;top:56px;left:0;right:0;overflow:hidden}.navbar-links-open{opacity:1;max-height:480px}.navbar-icon-link{justify-content:flex-start;padding:12px}.navbar-icon-link:after{display:none}.navbar-mobile-label{display:inline}.navbar-user{border-left:none;border-top:1px solid 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var(--color-border);border-radius:var(--radius);box-shadow:var(--shadow);text-align:center;padding:20px}.stat-number{margin:0;font-size:30px;font-weight:700}.stat-label{color:var(--color-text-muted);margin:4px 0 0;font-size:13px}.form-error{color:var(--color-danger);margin:0;font-size:13px}.page-header{justify-content:space-between;align-items:center;margin-bottom:20px;display:flex}.list-plain{margin:0;padding:0;list-style:none}.card-link{color:inherit;text-decoration:none;display:block}.card-row{justify-content:space-between;align-items:center;display:flex}.card-meta{color:var(--color-text-muted);margin:4px 0 0;font-size:13px}.card-subtitle{color:var(--color-text-muted);margin:4px 0;font-size:14px}.card-unread{background:#eef4ff}.empty-state{color:var(--color-text-muted);text-align:center;padding:40px 0}.detail-back{margin-bottom:16px;font-size:14px;display:inline-block}.detail-field{margin:8px 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6px;font-size:30px}.dash-hero-sub{color:var(--color-text-muted);margin:0;font-size:15px}.dash-stats-row{grid-template-columns:repeat(3,1fr);gap:12px;margin-bottom:28px;display:grid}.dash-mini-stat{background:var(--color-surface);border:1px solid var(--color-border);border-radius:12px;align-items:center;gap:12px;padding:14px 16px;display:flex}.dash-mini-icon{border-radius:10px;flex-shrink:0;justify-content:center;align-items:center;width:38px;height:38px;display:flex}.dash-mini-icon-blue{color:#2563eb;background:#eff6ff}.dash-mini-icon-amber{color:#d97706;background:#fffbeb}.dash-mini-icon-red{color:#dc2626;background:#fef2f2}.dash-mini-number{margin:0;font-size:20px;font-weight:700;line-height:1}.dash-mini-label{color:var(--color-text-muted);margin:2px 0 0;font-size:12px}.section-header{justify-content:space-between;align-items:center;margin-bottom:12px;display:flex}.section-header h2{align-items:center;margin:0;font-size:17px;display:flex}.section-link{color:var(--color-primary);align-items:center;gap:4px;font-size:13px;font-weight:600;display:inline-flex}.empty-state-card{color:var(--color-text-muted);background:var(--color-surface);border:1px dashed var(--color-border);border-radius:12px;flex-direction:column;align-items:center;gap:8px;padding:28px 0;font-size:14px;display:flex}.dash-two-col{grid-template-columns:1fr 1fr;gap:24px;display:grid}.dash-cta-card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:12px;align-items:center;gap:12px;padding:16px;display:flex}.mini-announcement{border-bottom:1px solid var(--color-border);padding:10px 0}.mini-announcement:last-child{border-bottom:none}.stat-icon{border-radius:10px;justify-content:center;align-items:center;width:36px;height:36px;margin:0 auto 10px;display:flex}.stat-icon-blue{color:#2563eb;background:#eff6ff}.stat-icon-indigo{color:var(--color-primary);background:#eef2ff}.stat-icon-amber{color:#d97706;background:#fffbeb}.stat-icon-red{color:#dc2626;background:#fef2f2}.stat-icon-green{color:#16a34a;background:#f0fdf4}.fade-in{opacity:0;animation:.35s forwards fadeSlideIn}@media (width<=640px){.dash-hero{padding:22px}.dash-hero-title{font-size:24px}.dash-stats-row,.dash-two-col{grid-template-columns:1fr}}.dash-stat-modern{flex-direction:column;align-items:stretch;gap:0;padding:18px;transition:transform .2s,box-shadow .2s,border-color .2s}.dash-stat-modern:hover{border-color:#c7d2fe;transform:translateY(-2px);box-shadow:0 10px 24px #0f172a14}.dash-stat-top{justify-content:space-between;align-items:center;margin-bottom:14px;display:flex}.dash-trend-icon{border-radius:8px;flex-shrink:0;padding:4px}.dash-trend-green{color:#16a34a;background:#f0fdf4}.dash-trend-amber{color:#d97706;background:#fffbeb}.dash-trend-red{color:#dc2626;background:#fef2f2}.dash-stat-delta{color:var(--color-text-muted);margin:8px 0 0;font-size:12px}.stat-card-modern{text-align:left;padding:18px;transition:transform .2s,box-shadow .2s,border-color .2s}.stat-card-modern:hover{border-color:#c7d2fe;transform:translateY(-2px);box-shadow:0 10px 24px #0f172a14}.stat-card-modern .stat-icon{margin:0}.stat-card-modern .stat-number{font-size:26px}.activity-row{background:var(--color-surface);border:1px solid var(--color-border);border-radius:12px;align-items:center;gap:12px;margin-bottom:10px;padding:12px 14px;transition:background .15s,border-color .15s,transform .15s;display:flex}.activity-row:hover{background:#f8fafc;border-color:#c7d2fe;text-decoration:none;transform:translate(3px)}.activity-icon{border-radius:10px;flex-shrink:0;justify-content:center;align-items:center;width:36px;height:36px;display:flex}.activity-icon-red{color:#dc2626;background:#fef2f2}.activity-icon-amber{color:#d97706;background:#fffbeb}.activity-main{flex:1;min-width:0}.activity-title{white-space:nowrap;text-overflow:ellipsis;margin:0;font-size:14px;font-weight:600;overflow:hidden}.activity-time{color:var(--color-text-muted);flex-shrink:0;font-size:12px}.dash-progress-card{background:var(--color-surface);border:1px solid var(--color-border);box-shadow:var(--shadow);border-radius:12px;margin-bottom:28px;padding:16px 18px}.dash-progress-head{justify-content:space-between;align-items:center;margin-bottom:10px;display:flex}.dash-progress-head p{margin:0;font-size:14px;font-weight:600}.dash-progress-head span{color:var(--color-primary);font-size:13px;font-weight:700}.dash-progress-sub{color:var(--color-text-muted);margin:8px 0 0;font-size:12px}.progress-track{background:var(--color-border);border-radius:999px;width:100%;height:8px;overflow:hidden}.progress-fill{background:linear-gradient(90deg,#818cf8,#4f46e5);border-radius:999px;height:100%;transition:width .4s}.progress-fill-amber{background:linear-gradient(90deg,#fcd34d,#f59e0b)}@media (width<=640px){.activity-time{display:none}}.offline-banner{color:var(--color-danger);z-index:60;background:#fef2f2;justify-content:center;align-items:center;gap:8px;padding:8px;font-size:13px;font-weight:500;display:flex;position:sticky;top:0}@keyframes ring{0%,to{transform:rotate(0)}10%{transform:rotate(12deg)}20%{transform:rotate(-10deg)}30%{transform:rotate(6deg)}40%{transform:rotate(0)}}.unread-count{background:var(--color-danger);color:#fff;border-radius:999px;padding:1px 8px;font-size:12px;font-weight:700}.notification-card{opacity:0;animation:.35s forwards fadeSlideIn}@keyframes fadeSlideIn{0%{opacity:0;transform:translateY(6px)}to{opacity:1;transform:translateY(0)}}.profile-header{align-items:center;gap:16px;margin-bottom:24px;display:flex}.profile-avatar-large{background:var(--color-primary);color:#fff;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:56px;height:56px;font-size:22px;font-weight:700;display:flex}.role-pill{color:var(--color-primary);text-transform:capitalize;background:#eef2ff;border-radius:999px;align-items:center;gap:4px;margin-top:4px;padding:2px 10px;font-size:12px;font-weight:600;display:inline-flex}.label-with-icon{align-items:center;gap:6px;display:flex}.btn-primary,.btn-secondary,.btn-danger{align-items:center;gap:6px;display:inline-flex}.btn-primary:hover,.btn-secondary:hover{transition:transform .12s;transform:translateY(-1px)}.card{transition:transform .15s,box-shadow .15s}.card:hover{transform:translateY(-2px);box-shadow:0 4px 12px #00000014}@media (prefers-reduced-motion:reduce){.icon-ring,.notification-card,.card,.btn-primary,.btn-secondary{transition:none!important;animation:none!important}}@media (width<=640px){.navbar{flex-wrap:wrap;gap:12px;padding:12px 16px}.navbar-user{justify-content:space-between;width:100%;margin-left:0}.page-container{padding:0 14px 40px}.auth-card{margin:0 16px;padding:28px 20px}.stats-grid{grid-template-columns:repeat(2,1fr)}.card-row{flex-wrap:wrap;gap:8px}.form-stack{max-width:100%}}