:root{--green:#1f8f5f;--green-2:#146c47;--cream:#f7f4ea;--gray:#64748b;--dark:#0f172a;--card:#fff;--line:#e2e8f0;--danger:#dc2626;--shadow:0 18px 40px rgba(15,23,42,.10)}*{box-sizing:border-box}body{margin:0;font-family:Inter,Segoe UI,Arial,sans-serif;background:var(--cream);color:#1e293b}a{text-decoration:none;color:inherit}.login-page{min-height:100vh;display:grid;place-items:center;padding:24px;background:linear-gradient(135deg,#23DEB8,#CEFC26)}.login-card{width:min(440px,100%);background:#fff;border-radius:26px;padding:32px;box-shadow:var(--shadow)}.login-card h1{margin:0;color:var(--green)}.form-group{margin:12px 0}.form-group label{display:block;font-weight:700;margin-bottom:6px}.form-control,select,input[type=file]{width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:12px;background:#fff}.btn{display:inline-flex;align-items:center;gap:8px;border:0;border-radius:12px;padding:11px 16px;font-weight:700;cursor:pointer;background:var(--green);color:#fff}.btn.secondary{background:#e2e8f0;color:#0f172a}.btn.danger{background:var(--danger)}.btn.small{padding:7px 10px;font-size:13px}.layout{display:flex;min-height:100vh}.sidebar{width:280px;background:linear-gradient(180deg,var(--green-2),var(--green));color:#fff;padding:22px 16px;position:fixed;inset:0 auto 0 0;transition:.25s;z-index:2}.sidebar.collapsed{width:86px}.brand{display:flex;gap:12px;align-items:center;margin-bottom:24px}.logo{width:46px;height:46px;border-radius:16px;background:#fff;color:var(--green);display:grid;place-items:center;font-size:28px;font-weight:900}.brand small,.topbar small{display:block;opacity:.8}.sidebar nav a{display:block;padding:12px 14px;margin:6px 0;border-radius:14px;color:#eefdf4}.sidebar nav a:hover{background:rgba(255,255,255,.16)}.sidebar.collapsed .brand div:not(.logo),.sidebar.collapsed nav a{font-size:0}.main{margin-left:280px;width:calc(100% - 280px);transition:.25s}.sidebar.collapsed+.main{margin-left:86px;width:calc(100% - 86px)}.topbar{height:76px;background:rgba(255,255,255,.84);backdrop-filter:blur(12px);border-bottom:1px solid var(--line);display:flex;align-items:center;gap:16px;padding:0 24px;position:sticky;top:0;z-index:1}.top-actions{margin-left:auto;display:flex;gap:12px;align-items:center}.icon-btn{border:0;border-radius:12px;background:#eef2f7;padding:10px 12px;cursor:pointer}.logout{padding:10px 14px;border-radius:12px;background:var(--dark);color:#fff}.content{padding:24px}.grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}.card{background:var(--card);border:1px solid var(--line);border-radius:22px;padding:20px;box-shadow:var(--shadow);margin-bottom:18px}.stat{display:flex;justify-content:space-between;align-items:center}.stat b{font-size:32px;color:var(--green)}.table-wrap{overflow:auto}.table{width:100%;border-collapse:collapse;background:#fff;border-radius:16px;overflow:hidden}.table th,.table td{padding:12px;border-bottom:1px solid var(--line);text-align:left;white-space:nowrap}.table th{background:#eef8f1;color:#14532d}.actions{display:flex;gap:8px;flex-wrap:wrap}.row{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.filters{display:flex;gap:12px;align-items:end;flex-wrap:wrap}.badge{display:inline-block;padding:5px 10px;border-radius:999px;background:#dcfce7;color:#166534;font-weight:700}.badge.warn{background:#fef3c7;color:#92400e}.loader{position:fixed;inset:0;background:#ffffffd9;display:grid;place-items:center;z-index:9}.loader.hide{display:none}.loader span{width:46px;height:46px;border:5px solid #bbf7d0;border-top-color:var(--green);border-radius:50%;animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}body.dark{--cream:#0f172a;--card:#111827;--line:#334155;color:#e5e7eb}body.dark .topbar,body.dark .table,body.dark .form-control,body.dark select{background:#111827;color:#e5e7eb}body.dark .login-card{background:#111827;color:#e5e7eb}@media(max-width:900px){.sidebar{transform:translateX(-100%)}.sidebar.collapsed{transform:translateX(0);width:280px}.sidebar.collapsed .brand div:not(.logo),.sidebar.collapsed nav a{font-size:initial}.main,.sidebar.collapsed+.main{margin-left:0;width:100%}.grid{grid-template-columns:repeat(2,1fr)}.row{grid-template-columns:1fr}}@media(max-width:560px){.grid{grid-template-columns:1fr}.content{padding:14px}.topbar{padding:0 12px}.topbar strong{font-size:14px}.logout{padding:9px}}
@media print{.sidebar,.topbar,.no-print{display:none}.main{margin:0;width:100%}.card{box-shadow:none;border:0}.content{padding:0}}
.subject-stack{display:flex;flex-direction:column;gap:6px;white-space:normal}.subject-stack span{display:block;padding:5px 9px;border-radius:10px;background:#eef8f1;color:#14532d;font-weight:600}

.sidebar nav a{display:flex;align-items:center;gap:10px}.menu-icon{width:24px;min-width:24px;height:24px;display:inline-grid;place-items:center;border-radius:8px;background:rgba(255,255,255,.14);font-size:15px;line-height:1}.sidebar nav a:hover .menu-icon{background:rgba(255,255,255,.24);transform:scale(1.08)}.sidebar.collapsed .menu-text{display:none}.sidebar.collapsed .menu-icon{margin:auto}@media(max-width:900px){.sidebar.collapsed .menu-text{display:inline}.sidebar.collapsed .menu-icon{margin:0}}
.sidebar nav a{font-weight:700;letter-spacing:.01em;line-height:1.25}.menu-icon{color:#fff;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.14);box-shadow:inset 0 1px 0 rgba(255,255,255,.10);transition:.2s}.menu-icon svg{width:17px;height:17px;display:block;fill:currentColor}.sidebar nav a:hover{background:rgba(255,255,255,.18);transform:translateX(3px)}.sidebar nav a:hover .menu-icon{background:rgba(255,255,255,.22);border-color:rgba(255,255,255,.28);transform:scale(1.06)}.menu-text{font-size:14.5px;color:#fff;text-shadow:0 1px 1px rgba(0,0,0,.08)}.sidebar.collapsed nav a:hover{transform:none}

.selection-head{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:12px;flex-wrap:wrap}.selection-head h3{margin:0}.class-chip{display:inline-flex;align-items:center;background:#ecfdf5;color:#166534;border:1px solid #bbf7d0;padding:8px 12px;border-radius:999px;font-weight:700}body.dark .class-chip{background:#052e1f;color:#86efac;border-color:#166534}

.class-card{background:linear-gradient(135deg,#ecfdf5 0%,#d1fae5 55%,#bbf7d0 100%);border-color:#86efac;transition:transform .2s ease,box-shadow .2s ease}.class-card .class-meta{display:flex;flex-direction:column;gap:4px}.class-card .class-name{font-size:1.1rem;font-weight:800;color:#065f46;letter-spacing:.01em}.class-card small{font-weight:600;color:#0f766e}.class-card b{color:#047857}.class-card:hover{transform:translateY(-2px);box-shadow:0 20px 34px rgba(6,95,70,.18)}body.dark .class-card{background:linear-gradient(135deg,#052e16,#064e3b);border-color:#065f46}body.dark .class-card .class-name{color:#86efac}body.dark .class-card small{color:#99f6e4}body.dark .class-card b{color:#6ee7b7}