/* Blue Editorial Classroom — light canvas, cobalt actions, Manrope + Source Sans 3. */
:root{--cobalt:#2563eb;--navy:#0f172a;--ink:#172033;--mist:#f5f7fb;--line:#e6eaf1;--muted:#718096;--shadow:0 14px 35px rgba(15,23,42,.07);--radius:18px}*{box-sizing:border-box}body{margin:0;background:var(--mist);color:var(--ink);font-family:'Source Sans 3',sans-serif;font-size:15px}.app-shell{min-height:100vh;display:flex}.sidebar{width:258px;background:#fff;border-right:1px solid var(--line);padding:27px 17px 20px;position:fixed;inset:0 auto 0 0;z-index:10;display:flex;flex-direction:column}.brand{display:flex;align-items:center;gap:11px;text-decoration:none;color:var(--navy);padding:0 13px}.brand strong{display:block;font:800 18px Manrope}.brand small{display:block;color:#8a94a6;letter-spacing:.18em;font:700 9px Manrope;margin-top:2px}.brand-mark{width:38px;height:38px;background:var(--cobalt);color:#fff;border-radius:12px;display:grid;place-items:center;font:800 21px Manrope;box-shadow:0 8px 20px rgba(37,99,235,.25)}.sidebar-label,.eyebrow{font:800 10px Manrope;letter-spacing:.17em;color:#92a0b5}.sidebar-label{margin:46px 13px 12px}.nav-link{color:#68758a;border-radius:11px;padding:11px 13px;font-weight:600;display:flex;gap:12px;align-items:center;transition:.18s ease}.nav-link i{width:17px;text-align:center}.nav-link:hover,.nav-link.active{background:#eef4ff;color:var(--cobalt);transform:translateX(2px)}.sidebar-footer{margin-top:auto;border-top:1px solid var(--line);padding-top:13px}.main-content{margin-left:258px;width:calc(100% - 258px)}.topbar{height:104px;background:rgba(255,255,255,.86);backdrop-filter:blur(14px);border-bottom:1px solid var(--line);display:flex;justify-content:space-between;align-items:center;padding:0 clamp(22px,4vw,58px);position:sticky;top:0;z-index:5}.page-title{font:800 clamp(21px,2vw,28px) Manrope;margin:7px 0 0;color:var(--navy)}.topbar-actions{display:flex;align-items:center;gap:14px}.btn-icon{width:40px;height:40px;padding:0;border:1px solid var(--line);border-radius:12px;color:#617089;background:#fff}.user-chip{display:flex;gap:10px;align-items:center;background:none;border:0}.user-chip:after{margin-left:5px}.user-chip b,.user-chip small{display:block}.user-chip b{font:700 13px Manrope}.user-chip small{font-size:12px;color:var(--muted)}.avatar{width:37px;height:37px;border-radius:50%;background:#dbe8ff;color:var(--cobalt);display:grid;place-items:center;font:800 15px Manrope}.content-wrap{padding:36px clamp(22px,4vw,58px);max-width:1600px}.hero-panel{min-height:232px;border-radius:24px;padding:34px 40px;background:linear-gradient(118deg,#1d4ed8,#2563eb 62%,#4f86f2);color:#fff;display:flex;justify-content:space-between;align-items:center;overflow:hidden;position:relative;box-shadow:0 18px 35px rgba(37,99,235,.18);margin-bottom:24px}.hero-panel h2{font:800 clamp(25px,3vw,38px) Manrope;margin:13px 0 5px}.hero-panel p{font-size:17px;opacity:.78;margin:0}.hero-symbol{font-size:100px;opacity:.13;transform:rotate(-12deg);margin-right:7%}.light{color:rgba(255,255,255,.62)}.btn{font:700 13px Manrope;border-radius:11px;padding:11px 16px}.btn-primary{background:var(--cobalt);border-color:var(--cobalt)}.btn-primary:hover{background:#1d4ed8;border-color:#1d4ed8}.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:15px;margin-bottom:24px}.stat-card,.panel,.class-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}.stat-card{padding:18px;display:flex;gap:14px;align-items:center}.stat-icon{width:42px;height:42px;border-radius:13px;background:color-mix(in srgb,var(--icon-color) 10%,white);color:var(--icon-color);display:grid;place-items:center}.stat-card span,.stat-card small{display:block;color:var(--muted);font-size:12px}.stat-card strong{display:block;font:800 26px Manrope;color:var(--navy);line-height:1.25}.stat-card small{font-size:11px}.panel{padding:25px}.panel-heading{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:20px}.panel-heading h3{font:800 18px Manrope;margin:7px 0 0}.text-link,.class-meta a{font:700 12px Manrope;color:var(--cobalt);text-decoration:none}.timeline-item{display:flex;gap:16px;padding:15px 0;border-bottom:1px solid var(--line)}.timeline-item:last-child{border:0}.timeline-dot{width:9px;height:9px;background:var(--cobalt);border-radius:50%;margin:6px 0 0 3px;box-shadow:0 0 0 5px #e4edff;flex:none}.timeline-item b{font:700 14px Manrope}.timeline-item small{color:#97a2b4;font-size:11px}.timeline-item p{margin:4px 0 0;color:var(--muted)}.chart-note{display:flex;align-items:center;gap:8px;border-top:1px solid var(--line);padding:11px 0 0;margin-top:12px;font-size:13px;color:var(--muted)}.chart-note strong{margin-left:auto;color:var(--navy);font-family:Manrope}.dot{width:8px;height:8px;border-radius:50%}.dot.blue{background:var(--cobalt)}.dot.teal{background:#0ea5a4}.section-toolbar{display:flex;justify-content:space-between;align-items:center;margin-bottom:24px}.lead-copy{color:var(--muted);font-size:17px;margin:0}.class-card{overflow:hidden;transition:.2s ease}.class-card:hover{transform:translateY(-3px);box-shadow:0 20px 42px rgba(15,23,42,.12)}.class-banner{height:118px;background:linear-gradient(120deg,#0f172a,#29466e);color:#fff;padding:18px;display:flex;justify-content:space-between;align-items:flex-start}.class-banner span{font:800 10px Manrope;letter-spacing:.12em;opacity:.8}.class-banner i{opacity:.7}.class-card h3{font:800 19px Manrope;margin:9px 0 7px}.class-card p{color:var(--muted);min-height:44px;margin:0 0 18px}.class-meta{border-top:1px solid var(--line);padding-top:14px;display:flex;justify-content:space-between;align-items:center;font-size:12px;color:var(--muted)}.empty-state{text-align:center;padding:48px 20px;color:var(--muted)}.empty-state i{font-size:32px;color:#b8c3d4;margin-bottom:12px}.empty-state h3{font:800 18px Manrope;color:var(--navy)}.rank-badge{display:inline-grid;place-items:center;min-width:38px;height:25px;border-radius:999px;font:800 11px Manrope}.rank-gold{background:#fff2bf;color:#9b6b00}.rank-silver{background:#e9edf3;color:#657184}.rank-bronze{background:#f5dfce;color:#995b2b}.footer{color:#9aa6b7;text-align:center;font-size:12px;padding:30px 0}.footer span{margin:0 8px}.auth-page{min-height:100vh;background:linear-gradient(130deg,#eef4ff,#f8fafc 50%,#e7efff);display:grid;place-items:center;padding:20px}.auth-card{width:min(100%,460px);background:#fff;border:1px solid var(--line);border-radius:25px;padding:45px;box-shadow:0 30px 80px rgba(15,23,42,.1)}.auth-card h1{font:800 29px Manrope;margin:13px 0 9px;color:var(--navy)}.form-label{font:700 12px Manrope;color:#516075}.form-control,.form-select{border:1px solid #dce3ee;border-radius:10px;padding:12px 14px;font-size:15px}.form-control:focus,.form-select:focus{border-color:#87aaf5;box-shadow:0 0 0 4px #e9f0ff}.auth-note{margin-top:23px;padding-top:18px;border-top:1px solid var(--line);color:#8b96a8;font-size:12px}.auth-note i{color:var(--cobalt);margin-right:5px}@media(max-width:991px){.sidebar{transform:translateX(-100%);transition:.2s}.sidebar.open{transform:none;box-shadow:12px 0 40px rgba(15,23,42,.12)}.main-content{margin-left:0;width:100%}.stat-grid{grid-template-columns:repeat(2,1fr)}}@media(max-width:575px){.content-wrap{padding:24px 16px}.topbar{height:84px;padding:0 16px}.hero-panel{padding:28px 24px;min-height:250px}.hero-symbol{display:none}.stat-card{padding:14px;gap:10px}.stat-card strong{font-size:22px}.stat-card small{display:none}.auth-card{padding:32px 24px}.section-toolbar{align-items:flex-start;gap:14px}.section-toolbar .btn{white-space:nowrap}}
body.dark-mode{background:#0f172a;color:#e5edf9}body.dark-mode .sidebar,body.dark-mode .topbar,body.dark-mode .panel,body.dark-mode .stat-card,body.dark-mode .class-card,body.dark-mode .btn-icon,body.dark-mode .auth-card{background:#172236;border-color:#263650}body.dark-mode .page-title,body.dark-mode .panel-heading h3,body.dark-mode .stat-card strong,body.dark-mode .class-card h3{color:#f5f8ff}body.dark-mode .nav-link{color:#aab7cb}body.dark-mode .nav-link:hover,body.dark-mode .nav-link.active{background:#203559;color:#8bb0ff}body.dark-mode .topbar{background:rgba(15,23,42,.88)}body.dark-mode .class-card p,body.dark-mode .lead-copy,body.dark-mode .timeline-item p{color:#9eabc0}
@media(prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}