:root{--text:#6b6375;--text-h:#08060d;--bg:#fff;--border:#e5e4e7;--code-bg:#f4f3ec;--accent:#aa3bff;--accent-bg:#aa3bff1a;--accent-border:#aa3bff80;--social-bg:#f4f3ec80;--shadow:#0000001a 0 10px 15px -3px, #0000000d 0 4px 6px -2px;--sans:system-ui, "Segoe UI", Roboto, sans-serif;--heading:system-ui, "Segoe UI", Roboto, sans-serif;--mono:ui-monospace, Consolas, monospace;font:18px/145% var(--sans);letter-spacing:.18px;--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light dark;color:var(--text);background:var(--bg);font-synthesis:none;text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}@media (prefers-color-scheme:dark){:root{--lightningcss-light: ;--lightningcss-dark:initial}}@media (width<=1024px){:root{font-size:16px}}@media (prefers-color-scheme:dark){:root{--text:#9ca3af;--text-h:#f3f4f6;--bg:#16171d;--border:#2e303a;--code-bg:#1f2028;--accent:#c084fc;--accent-bg:#c084fc26;--accent-border:#c084fc80;--social-bg:#2f303a80;--shadow:#0006 0 10px 15px -3px, #00000040 0 4px 6px -2px}#social .button-icon{filter:invert()brightness(2)}}body{margin:0}#root{text-align:center;border-inline:1px solid var(--border);box-sizing:border-box;flex-direction:column;width:1126px;max-width:100%;min-height:100svh;margin:0 auto;display:flex}h1,h2{font-family:var(--heading);color:var(--text-h);font-weight:500}h1{letter-spacing:-1.68px;margin:32px 0;font-size:56px}@media (width<=1024px){h1{margin:20px 0;font-size:36px}}h2{letter-spacing:-.24px;margin:0 0 8px;font-size:24px;line-height:118%}@media (width<=1024px){h2{font-size:20px}}p{margin:0}code,.counter{font-family:var(--mono);color:var(--text-h);border-radius:4px;display:inline-flex}code{background:var(--code-bg);padding:4px 8px;font-size:15px;line-height:135%}*{box-sizing:border-box;margin:0;padding:0}body{color:#172033;background:#f4f7fc;font-family:Arial,Helvetica,sans-serif}button,input,textarea{font-family:inherit}button{cursor:pointer}button:focus,input:focus,textarea:focus{outline:3px solid #2563eb26}.app{min-height:100vh}.navbar{z-index:100;background:#fff;border-bottom:1px solid #e7ebf3;position:sticky;top:0}.nav-inner{align-items:center;gap:24px;max-width:1400px;min-height:78px;margin:auto;padding:12px 24px;display:flex}.brand{cursor:pointer;align-items:center;gap:12px;min-width:240px;display:flex}.brand-logo,.school-logo{color:#fff;letter-spacing:1px;background:linear-gradient(135deg,#2563eb,#4f46e5);border-radius:14px;place-items:center;width:48px;height:48px;font-weight:800;display:grid}.brand div:last-child{flex-direction:column;display:flex}.brand strong{font-size:15px}.brand span{color:#718096;margin-top:3px;font-size:12px}.nav-links{flex:1;align-items:center;gap:4px;display:flex}.nav-links button{color:#596579;background:0 0;border:none;border-radius:9px;padding:10px 12px;font-size:14px}.nav-links button:hover{color:#2563eb;background:#f2f5fb}.nav-links button.active{color:#2563eb;background:#eaf1ff;font-weight:700}.user-area{align-items:center;gap:9px;display:flex}.user-avatar,.leader-avatar{color:#2563eb;background:#dbeafe;border-radius:50%;place-items:center;width:40px;height:40px;font-weight:800;display:grid}.user-info{flex-direction:column;min-width:110px;display:flex}.user-info strong{font-size:13px}.user-info span{color:#718096;text-transform:capitalize;margin-top:2px;font-size:11px}.logout-btn{color:#475569;background:#fff;border:1px solid #dce2ec;border-radius:9px;padding:9px 12px}.logout-btn:hover{background:#f8fafc}.main-container{max-width:1400px;margin:auto;padding:30px 24px 60px}.landing-page{background:radial-gradient(circle at 100% 0,#dbeafe,#0000 30%),#f4f7fc;min-height:100vh;padding:60px 24px}.hero{text-align:center;max-width:1000px;margin:auto}.hero-badge{color:#2563eb;letter-spacing:1px;background:#eaf1ff;border-radius:999px;margin-bottom:20px;padding:8px 14px;font-size:12px;font-weight:800;display:inline-block}.hero h1{color:#111827;margin-bottom:20px;font-size:clamp(36px,6vw,64px);line-height:1.05}.hero p{color:#64748b;max-width:680px;margin:auto;font-size:18px;line-height:1.7}.login-choice{flex-wrap:wrap;justify-content:center;gap:14px;margin-top:30px;display:flex}.primary-btn,.secondary-btn{border:none;border-radius:11px;padding:13px 20px;font-size:14px;font-weight:700}.primary-btn{color:#fff;background:#2563eb}.primary-btn:hover{background:#1d4ed8}.secondary-btn{color:#2563eb;background:#fff;border:1px solid #cbd5e1}.secondary-btn:hover{background:#f8fafc}.feature-grid{grid-template-columns:repeat(4,1fr);gap:18px;max-width:1100px;margin:70px auto 0;display:grid}.feature-card{background:#fff;border:1px solid #e7ebf3;border-radius:18px;padding:25px;box-shadow:0 10px 30px #1e293b0d}.feature-icon{margin-bottom:15px;font-size:32px}.feature-card h3{margin-bottom:8px}.feature-card p{color:#718096;font-size:14px;line-height:1.5}.login-page{background:radial-gradient(circle at 0 0,#dbeafe,#0000 35%),#f4f7fc;place-items:center;min-height:100vh;padding:25px;display:grid}.login-card{background:#fff;border:1px solid #e7ebf3;border-radius:22px;width:min(440px,100%);padding:35px;box-shadow:0 20px 60px #1e293b17}.school-logo{margin-bottom:20px}.login-card h1{margin-bottom:8px;font-size:30px}.muted{color:#718096;margin-bottom:25px;line-height:1.6}.login-card label{margin-bottom:8px;font-size:13px;font-weight:700;display:block}.login-card input,.announcement-form input,.announcement-form textarea{border:1px solid #d7deea;border-radius:10px;width:100%;margin-bottom:14px;padding:13px 14px;font-size:14px}.announcement-form textarea{resize:vertical}.full-btn{width:100%;margin-top:5px}.text-btn{color:#2563eb;background:0 0;border:none;margin:18px auto;display:block}.error-box{color:#be123c;background:#fff1f2;border:1px solid #fecdd3;border-radius:9px;margin-bottom:13px;padding:11px 13px;font-size:13px}.demo-box{color:#64748b;background:#f8fafc;border:1px solid #e5e7eb;border-radius:10px;padding:14px;font-size:13px}.demo-box strong{color:#334155;margin-bottom:5px;display:block}.page-hero{color:#fff;background:linear-gradient(135deg,#1d4ed8,#4f46e5);border-radius:22px;margin-bottom:25px;padding:35px}.page-hero h1{margin-bottom:8px;font-size:32px}.page-hero p{opacity:.9;line-height:1.6}.stats-grid{grid-template-columns:repeat(4,1fr);gap:18px;margin-bottom:25px;display:grid}.stat-card{background:#fff;border:1px solid #e7ebf3;border-radius:17px;align-items:center;gap:15px;padding:20px;display:flex}.stat-icon{background:#eff6ff;border-radius:13px;place-items:center;width:48px;height:48px;font-size:23px;display:grid}.stat-card strong{margin-bottom:3px;font-size:24px;display:block}.stat-card span{color:#718096;font-size:12px}.dashboard-grid{grid-template-columns:1.25fr 1fr;gap:20px;margin-bottom:20px;display:grid}.panel{background:#fff;border:1px solid #e7ebf3;border-radius:17px;margin-bottom:20px;padding:22px}.section-title{justify-content:space-between;align-items:center;margin-bottom:17px;display:flex}.section-title h2{font-size:18px}.section-title button{color:#2563eb;background:0 0;border:none;font-weight:700}.time-row{border-bottom:1px solid #edf0f5;grid-template-columns:70px 1fr 100px;align-items:center;gap:12px;padding:12px 0;font-size:13px;display:grid}.time-row:last-child{border-bottom:none}.time{color:#2563eb;font-weight:800}.room{color:#718096;text-align:right}.homework-row{border-bottom:1px solid #edf0f5;justify-content:space-between;gap:15px;padding:15px 0;display:flex}.homework-row:last-child{border-bottom:none}.homework-row>div:first-child{flex-direction:column;gap:5px;display:flex}.homework-row strong{font-size:14px}.homework-row span{color:#718096;font-size:12px}.homework-right{flex-direction:column;align-items:flex-end;gap:7px;display:flex}.homework-right small{color:#718096}.status{border-radius:999px;padding:5px 9px;font-size:11px;font-weight:700;display:inline-block}.status.pending{color:#c2410c;background:#fff7ed}.status.submitted{color:#047857;background:#ecfdf5}.announcement-grid{grid-template-columns:repeat(3,1fr);gap:18px;display:grid}.announcement-card{background:#fff;border:1px solid #e7ebf3;border-radius:15px;gap:14px;padding:20px;display:flex}.announcement-icon{background:#eff6ff;border-radius:12px;flex-shrink:0;place-items:center;width:42px;height:42px;display:grid}.announcement-date{color:#2563eb;font-size:11px;font-weight:800}.announcement-card h3{margin:7px 0;font-size:15px}.announcement-card p{color:#64748b;font-size:13px;line-height:1.6}.table-wrapper{overflow-x:auto}table{border-collapse:collapse;width:100%}th,td{text-align:left;border-bottom:1px solid #edf0f5;padding:15px}th{color:#64748b;text-transform:uppercase;background:#f8fafc;font-size:12px}td{font-size:14px}.grade-badge{color:#2563eb;background:#eaf1ff;border-radius:8px;padding:6px 10px;font-weight:800}.leader-row{border-bottom:1px solid #edf0f5;grid-template-columns:60px 45px 1fr auto;align-items:center;gap:15px;padding:15px 0;display:grid}.leader-row:last-child{border-bottom:none}.rank{color:#2563eb;font-weight:800}.leader-info{flex-direction:column;gap:4px;display:flex}.leader-info strong{font-size:14px}.leader-info span{color:#718096;font-size:12px}.points{color:#2563eb;font-weight:800}.action-grid{grid-template-columns:repeat(3,1fr);gap:14px;display:grid}.action-card{text-align:left;background:#f8fafc;border:1px solid #e1e7f0;border-radius:14px;flex-direction:column;gap:8px;padding:18px;display:flex}.action-card:hover{background:#eff6ff;border-color:#bfdbfe}.action-card span{font-size:25px}.action-card strong{font-size:14px}.action-card small{color:#718096;line-height:1.5}.class-summary{grid-template-columns:repeat(3,1fr);gap:10px;display:grid}.class-summary div{background:#f8fafc;border-radius:12px;padding:18px}.class-summary span,.class-summary strong{display:block}.class-summary span{color:#718096;margin-bottom:7px;font-size:12px}.class-summary strong{font-size:21px}.create-header{justify-content:space-between;align-items:center;gap:20px;display:flex}.create-header h2{margin-bottom:6px}.create-header p{color:#718096;font-size:13px}.announcement-form{border-top:1px solid #edf0f5;margin-top:20px;padding-top:20px}.event-list{flex-direction:column;display:flex}.event-row{border-bottom:1px solid #edf0f5;grid-template-columns:75px 1fr 40px;align-items:center;gap:18px;padding:18px 5px;display:grid}.event-row:last-child{border-bottom:none}.event-date{color:#2563eb;background:#eff6ff;border-radius:13px;align-content:center;place-items:center;width:60px;height:60px;display:grid}.event-date strong{font-size:21px}.event-date span{text-transform:uppercase;font-size:10px;font-weight:800}.event-details{flex-direction:column;gap:5px;display:flex}.event-details strong{font-size:15px}.event-details span{color:#718096;font-size:12px}.event-arrow{color:#2563eb;font-size:20px}@media (width<=1100px){.nav-inner{flex-wrap:wrap}.nav-links{order:3;width:100%;overflow-x:auto}.feature-grid,.stats-grid{grid-template-columns:repeat(2,1fr)}.announcement-grid{grid-template-columns:1fr 1fr}}@media (width<=800px){.dashboard-grid,.action-grid,.announcement-grid{grid-template-columns:1fr}.user-info{display:none}}@media (width<=600px){.main-container{padding:18px 14px 40px}.nav-inner{padding:10px 14px}.brand{min-width:auto}.brand div:last-child{display:none}.feature-grid,.stats-grid{grid-template-columns:1fr}.page-hero{padding:25px}.page-hero h1{font-size:26px}.hero h1{font-size:38px}.login-choice{flex-direction:column}.login-choice button{width:100%}.panel{padding:17px}.leader-row{grid-template-columns:45px 40px 1fr auto;gap:9px}.leader-avatar{width:36px;height:36px}.time-row{grid-template-columns:55px 1fr}.room{display:none}.create-header{flex-direction:column;align-items:flex-start}.class-summary{grid-template-columns:1fr}}