*{margin:0;padding:0;box-sizing:border-box;-webkit-tap-highlight-color:transparent}
:root{
  --bg:#f8f9fc;--surface:#ffffff;--surface2:#f1f4f9;--surface3:#e8ecf2;
  --border:rgba(0,0,0,0.08);--border2:rgba(0,0,0,0.14);
  --text:#0d1117;--text2:#4a5568;--text3:#8a95a3;
  --primary:#2563eb;--primary-dark:#1d4ed8;--primary-light:#eff6ff;--primary-mid:#bfdbfe;
  --success:#059669;--success-bg:#ecfdf5;--success-border:#a7f3d0;
  --danger:#dc2626;--danger-bg:#fef2f2;--danger-border:#fca5a5;
  --warning:#d97706;--warning-bg:#fffbeb;--warning-border:#fde68a;
  --purple:#7c3aed;--purple-bg:#f5f3ff;
  --shadow-sm:0 1px 3px rgba(0,0,0,0.06);--shadow:0 4px 16px rgba(0,0,0,0.08);--shadow-lg:0 20px 40px rgba(0,0,0,0.12);
  --radius:10px;--radius-lg:16px;--radius-xl:20px;
  --sidebar:268px;--topbar:64px;--font:'DM Sans',system-ui,sans-serif;--mono:'DM Mono',monospace;
}
[data-theme="dark"]{
  --bg:#0d1117;--surface:#161b22;--surface2:#21262d;--surface3:#2d333b;
  --border:rgba(255,255,255,0.08);--border2:rgba(255,255,255,0.14);
  --text:#e6edf3;--text2:#8b949e;--text3:#4a5568;
  --primary:#3b82f6;--primary-dark:#2563eb;--primary-light:#0f172a;--primary-mid:#1e3a5f;
  --success:#10b981;--success-bg:#052e16;--success-border:#065f46;
  --danger:#ef4444;--danger-bg:#1a0000;--danger-border:#7f1d1d;
  --warning:#f59e0b;--warning-bg:#1c1400;--warning-border:#78350f;
  --purple:#a78bfa;--purple-bg:#1e1b4b;
  --shadow-sm:0 1px 3px rgba(0,0,0,0.3);--shadow:0 4px 16px rgba(0,0,0,0.4);--shadow-lg:0 20px 40px rgba(0,0,0,0.5);
}
html,body{height:100%;font-family:var(--font);background:var(--bg);color:var(--text);font-size:14px;line-height:1.5;transition:background .3s,color .3s}
::-webkit-scrollbar{width:5px;height:5px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--surface3);border-radius:10px}
.hidden{display:none!important}.flex{display:flex}.items-center{align-items:center}.justify-between{justify-content:space-between}
.gap-2{gap:8px}.gap-3{gap:12px}.gap-4{gap:16px}.w-full{width:100%}
.text-sm{font-size:13px}.text-xs{font-size:11px}.font-medium{font-weight:500}.font-semibold{font-weight:600}.font-bold{font-weight:700}
.truncate{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.text-danger{color:var(--danger)}.text-success{color:var(--success)}.text-warning{color:var(--warning)}.text-primary{color:var(--primary)}.text-muted{color:var(--text2)}
.mt-1{margin-top:4px}.mt-2{margin-top:8px}.mt-3{margin-top:12px}.mt-4{margin-top:16px}.mb-4{margin-bottom:16px}.mb-6{margin-bottom:24px}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:9px 18px;border-radius:var(--radius);font-size:13.5px;font-weight:600;cursor:pointer;border:none;transition:all .15s ease;font-family:var(--font);white-space:nowrap}
.btn:disabled{opacity:.45;cursor:not-allowed}.btn:active:not(:disabled){transform:scale(.97)}
.btn-primary{background:var(--primary);color:white}.btn-primary:hover:not(:disabled){background:var(--primary-dark)}
.btn-success{background:var(--success);color:white}.btn-danger{background:var(--danger);color:white}
.btn-outline{background:transparent;color:var(--text);border:1.5px solid var(--border2)}.btn-outline:hover{border-color:var(--primary);color:var(--primary)}
.btn-ghost{background:transparent;color:var(--text2);border:1.5px solid var(--border)}.btn-ghost:hover{background:var(--surface2)}
.btn-sm{padding:6px 13px;font-size:12.5px}.btn-xs{padding:4px 10px;font-size:12px}
.btn-icon{width:36px;height:36px;padding:0;border-radius:8px;background:var(--surface2);color:var(--text2);border:1.5px solid var(--border);cursor:pointer;display:inline-flex;align-items:center;justify-content:center;transition:all .15s;flex-shrink:0}
.btn-icon svg{width:16px;height:16px;stroke:currentColor;fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.form-group{margin-bottom:16px}.form-label{display:block;font-size:12px;font-weight:600;color:var(--text2);margin-bottom:5px;text-transform:uppercase;letter-spacing:.6px}
.form-control{width:100%;padding:10px 14px;border:1.5px solid var(--border2);border-radius:var(--radius);font-size:14px;font-family:var(--font);color:var(--text);background:var(--surface);transition:border-color .15s;outline:none}
.form-control:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(37,99,235,.12)}
select.form-control{cursor:pointer}
.card{background:var(--surface);border:1.5px solid var(--border);border-radius:var(--radius-lg);overflow:hidden}
.card-header{display:flex;align-items:center;justify-content:space-between;padding:18px 22px;border-bottom:1.5px solid var(--border)}
.card-title{font-size:15px;font-weight:700;color:var(--text)}.card-body{padding:22px}
.badge{display:inline-flex;align-items:center;gap:4px;padding:3px 10px;border-radius:20px;font-size:11.5px;font-weight:600}
.badge-success{background:var(--success-bg);color:var(--success);border:1px solid var(--success-border)}
.badge-danger{background:var(--danger-bg);color:var(--danger);border:1px solid var(--danger-border)}
.badge-primary{background:var(--primary-light);color:var(--primary);border:1px solid var(--primary-mid)}
.badge-gray{background:var(--surface2);color:var(--text2);border:1px solid var(--border)}
.table-wrap{overflow-x:auto}.table-wrap table{width:100%;border-collapse:collapse;font-size:13.5px}
.table-wrap thead th{text-align:left;padding:11px 16px;font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:.7px;color:var(--text3);background:var(--surface2);border-bottom:1.5px solid var(--border);white-space:nowrap}
.table-wrap tbody td{padding:13px 16px;border-bottom:1px solid var(--border);color:var(--text2);vertical-align:middle}
.table-wrap tbody tr:hover{background:var(--surface2)}.td-primary{color:var(--text);font-weight:600}.td-mono{font-family:var(--mono);font-size:12.5px;color:var(--primary);font-weight:500}
.stat-card{background:var(--surface);border:1.5px solid var(--border);border-radius:var(--radius-lg);padding:22px;cursor:default;transition:transform .2s,box-shadow .2s}
.stat-card:hover{transform:translateY(-3px);box-shadow:var(--shadow)}
.stat-icon{width:44px;height:44px;border-radius:12px;display:flex;align-items:center;justify-content:center;margin-bottom:14px}
.stat-icon svg{width:20px;height:20px;stroke:currentColor;fill:none;stroke-width:2}
.stat-value{font-size:28px;font-weight:800;color:var(--text);letter-spacing:-.5px;line-height:1}
.stat-label{font-size:12px;color:var(--text3);font-weight:600;text-transform:uppercase;letter-spacing:.5px;margin-top:5px}
.empty-state{text-align:center;padding:48px 24px}.empty-icon{font-size:48px;margin-bottom:14px;opacity:.6}.empty-title{font-size:16px;font-weight:700;margin-bottom:6px}.empty-desc{font-size:14px;color:var(--text3)}
.spinner{width:20px;height:20px;border:2px solid rgba(255,255,255,.3);border-top-color:white;border-radius:50%;animation:spin .6s linear infinite;display:inline-block}@keyframes spin{to{transform:rotate(360deg)}}
.toast-container{position:fixed;bottom:24px;right:24px;z-index:9999;display:flex;flex-direction:column;gap:10px;max-width:380px}
.toast{display:flex;align-items:flex-start;gap:12px;padding:14px 18px;background:var(--surface);border:1.5px solid var(--border);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);font-size:13.5px;animation:toastIn .3s ease;position:relative;overflow:hidden}
.toast::before{content:'';position:absolute;left:0;top:0;bottom:0;width:3px}
.toast-success::before{background:var(--success)}.toast-error::before{background:var(--danger)}.toast-info::before{background:var(--primary)}
.toast-icon{font-size:18px;flex-shrink:0}.toast-content{flex:1}.toast-title{font-weight:700;color:var(--text);margin-bottom:2px}.toast-msg{color:var(--text2);font-size:12.5px}
.toast-close{background:none;border:none;cursor:pointer;color:var(--text3);padding:2px;font-size:16px;margin-left:4px}
@keyframes toastIn{from{opacity:0;transform:translateX(100%)}to{opacity:1;transform:translateX(0)}}
@keyframes toastOut{from{opacity:1;transform:translateX(0)}to{opacity:0;transform:translateX(100%)}}
.modal-overlay{position:fixed;inset:0;background:rgba(0,0,0,0.55);backdrop-filter:blur(6px);z-index:1000;display:flex;align-items:center;justify-content:center;padding:20px;animation:fadeIn .2s ease}
.modal-overlay.hidden{display:none!important}
.modal{background:var(--surface);border-radius:var(--radius-xl);border:1.5px solid var(--border);box-shadow:var(--shadow-lg);width:100%;max-height:92vh;overflow-y:auto;animation:modalIn .25s ease}
@keyframes fadeIn{from{opacity:0}to{opacity:1}}@keyframes modalIn{from{opacity:0;transform:scale(.94) translateY(20px)}to{opacity:1;transform:scale(1) translateY(0)}}
.modal-header{display:flex;align-items:center;justify-content:space-between;padding:22px 26px;border-bottom:1.5px solid var(--border)}.modal-title{font-size:17px;font-weight:800}
.modal-body{padding:26px}.modal-footer{padding:18px 26px;border-top:1.5px solid var(--border);background:var(--surface2);display:flex;gap:10px;justify-content:flex-end}
#loginPage{min-height:100vh;display:flex;align-items:center;justify-content:center;background:var(--bg);position:relative;overflow:hidden}
#loginPage::before{content:'';position:absolute;width:800px;height:800px;background:radial-gradient(circle,rgba(37,99,235,.08),transparent 70%);top:-300px;right:-300px;pointer-events:none}
.login-card{background:var(--surface);border:1.5px solid var(--border);border-radius:var(--radius-xl);box-shadow:var(--shadow-lg);width:100%;max-width:420px;padding:42px 38px;position:relative;z-index:2}
.login-logo{width:56px;height:56px;background:linear-gradient(135deg,var(--primary),#7c3aed);border-radius:16px;display:flex;align-items:center;justify-content:center;margin:0 auto 22px;box-shadow:0 8px 20px rgba(37,99,235,.3)}
.login-logo svg{width:26px;height:26px;stroke:white;fill:none;stroke-width:2.5}
.login-title{text-align:center;margin-bottom:28px}.login-title h1{font-size:26px;font-weight:800;letter-spacing:-.5px;margin-bottom:6px}.login-title p{font-size:14px;color:var(--text3)}
.google-btn{display:flex;align-items:center;justify-content:center;gap:10px;width:100%;padding:12px;border:1.5px solid var(--border2);border-radius:var(--radius);background:var(--surface);cursor:pointer;font-size:14px;font-weight:600;font-family:var(--font);color:var(--text);transition:all .15s}
.google-btn:hover{background:var(--surface2);border-color:var(--primary)}
.divider{display:flex;align-items:center;gap:12px;margin:18px 0;color:var(--text3);font-size:12px;font-weight:600}.divider::before,.divider::after{content:'';flex:1;height:1px;background:var(--border2)}
.login-alert{padding:12px 16px;border-radius:var(--radius);font-size:13px;font-weight:500;margin-bottom:16px;display:none}
.login-alert-error{background:var(--danger-bg);color:var(--danger);border:1px solid var(--danger-border)}
#appPage{display:none;min-height:100vh}#appPage.active{display:flex}
.sidebar{width:var(--sidebar);min-width:var(--sidebar);height:100vh;background:var(--surface);border-right:1.5px solid var(--border);display:flex;flex-direction:column;position:fixed;left:0;top:0;z-index:100;overflow-y:auto;transition:transform .3s ease}
.sidebar-brand{padding:20px;border-bottom:1.5px solid var(--border)}.brand-row{display:flex;align-items:center;gap:10px}
.brand-icon{width:38px;height:38px;background:linear-gradient(135deg,var(--primary),#7c3aed);border-radius:10px;display:flex;align-items:center;justify-content:center;flex-shrink:0}
.brand-icon svg{width:18px;height:18px;stroke:white;fill:none;stroke-width:2.5}.brand-name{font-size:15px;font-weight:800}.brand-badge{font-size:9.5px;font-weight:700;color:var(--primary);background:var(--primary-light);border:1px solid var(--primary-mid);padding:1px 7px;border-radius:10px;display:inline-block;margin-top:2px}
.school-pill{margin:12px 14px;padding:12px 14px;background:var(--primary-light);border-radius:var(--radius);border:1px solid var(--primary-mid);cursor:pointer}
.school-pill-label{font-size:10px;font-weight:700;color:var(--primary);text-transform:uppercase;letter-spacing:.7px}.school-pill-name{font-size:13.5px;font-weight:700;color:var(--primary-dark);margin-top:3px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
nav{padding:8px 0}.nav-group-label{padding:16px 18px 6px;font-size:10px;font-weight:700;color:var(--text3);text-transform:uppercase;letter-spacing:.8px}
.nav-item{display:flex;align-items:center;gap:10px;padding:10px 14px;margin:1px 8px;border-radius:8px;cursor:pointer;color:var(--text2);font-size:13.5px;font-weight:500;transition:all .15s}
.nav-item:hover{background:var(--surface2);color:var(--text)}.nav-item.active{background:var(--primary);color:white;font-weight:600;box-shadow:0 3px 10px rgba(37,99,235,.3)}
.nav-icon{width:32px;height:32px;border-radius:7px;display:flex;align-items:center;justify-content:center;background:var(--surface2);flex-shrink:0}
.nav-item.active .nav-icon{background:rgba(255,255,255,.2)}.nav-icon svg{width:16px;height:16px;stroke:currentColor;fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.nav-count{margin-left:auto;background:var(--primary-light);color:var(--primary);font-size:11px;font-weight:700;padding:2px 8px;border-radius:10px}
.sidebar-footer{margin-top:auto;padding:14px;border-top:1.5px solid var(--border)}
.user-card{display:flex;align-items:center;gap:10px;padding:10px;border-radius:var(--radius);cursor:pointer}.user-card:hover{background:var(--surface2)}
.user-avatar{width:38px;height:38px;border-radius:50%;background:linear-gradient(135deg,var(--primary),#7c3aed);display:flex;align-items:center;justify-content:center;font-size:15px;font-weight:800;color:white;flex-shrink:0}
.user-name{font-size:13px;font-weight:700;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.user-role{font-size:11px;color:var(--text3);margin-top:1px}
.sb-status-badge{display:inline-flex;align-items:center;gap:6px;padding:4px 8px;border-radius:8px;font-size:11px;font-weight:700}
.sb-connected{background:var(--success-bg);color:var(--success)}.sb-disconnected{background:var(--danger-bg);color:var(--danger)}.sb-dot{width:8px;height:8px;border-radius:50%;background:currentColor}
.main-content{flex:1;margin-left:var(--sidebar);display:flex;flex-direction:column;min-height:100vh;min-width:0}
.topbar{height:var(--topbar);background:var(--surface);border-bottom:1.5px solid var(--border);display:flex;align-items:center;justify-content:space-between;padding:0 28px;position:sticky;top:0;z-index:50}
.topbar-left{display:flex;align-items:center;gap:14px;min-width:0}
.menu-toggle{display:none;width:38px;height:38px;border-radius:8px;background:var(--surface2);border:1.5px solid var(--border);align-items:center;justify-content:center;cursor:pointer;color:var(--text2);flex-shrink:0}
.menu-toggle svg{width:18px;height:18px;stroke:currentColor;fill:none;stroke-width:2}
.page-title{font-size:18px;font-weight:800;letter-spacing:-.3px}
.content-area{flex:1;padding:26px 28px;overflow-y:auto}
.section{display:none;animation:fadeIn .2s ease}.section.active{display:block}
.section-header{display:flex;align-items:flex-start;justify-content:space-between;margin-bottom:24px;flex-wrap:wrap;gap:12px}
.section-title{font-size:22px;font-weight:800;letter-spacing:-.4px}.section-subtitle{font-size:13.5px;color:var(--text3);margin-top:4px}
.filter-bar{background:var(--surface);border:1.5px solid var(--border);border-radius:var(--radius-lg);padding:14px 18px;margin-bottom:18px;display:flex;gap:12px;flex-wrap:wrap;align-items:center}
.search-wrap{flex:1;min-width:200px;position:relative}.search-wrap svg{position:absolute;left:12px;top:50%;transform:translateY(-50%);color:var(--text3);width:15px;height:15px;stroke:currentColor;fill:none;stroke-width:2}.search-wrap .form-control{padding-left:36px}
.confirm-overlay{position:fixed;inset:0;background:rgba(0,0,0,.6);z-index:2000;display:none;align-items:center;justify-content:center;padding:20px}
.confirm-box{background:var(--surface);border-radius:var(--radius-xl);padding:32px;max-width:400px;width:100%;text-align:center;animation:modalIn .25s ease}
.confirm-icon{font-size:48px;margin-bottom:16px}.confirm-title{font-size:20px;font-weight:800;margin-bottom:8px}.confirm-msg{color:var(--text2);font-size:14px;line-height:1.6;margin-bottom:24px}.confirm-actions{display:flex;gap:10px}
.sidebar-overlay{display:none;position:fixed;inset:0;background:rgba(0,0,0,.5);z-index:99}.sidebar-overlay.show{display:block}
.welcome-banner{background:linear-gradient(130deg,#1e40af 0%,#3b82f6 50%,#7c3aed 100%);border-radius:var(--radius-xl);padding:30px 32px;color:white;margin-bottom:24px;position:relative;overflow:hidden}
.welcome-banner::before{content:'';position:absolute;top:-60px;right:-60px;width:220px;height:220px;background:rgba(255,255,255,.07);border-radius:50%}
.banner-content{position:relative;z-index:1}.banner-title{font-size:22px;font-weight:800;margin-bottom:5px}.banner-sub{font-size:14px;opacity:.88}
.banner-chips{display:flex;gap:10px;margin-top:18px;flex-wrap:wrap}
.banner-chip{background:rgba(255,255,255,.15);backdrop-filter:blur(10px);border:1px solid rgba(255,255,255,.2);border-radius:10px;padding:10px 16px;display:flex;flex-direction:column}
.chip-label{font-size:10px;opacity:.8;text-transform:uppercase;letter-spacing:.6px;font-weight:600;margin-bottom:3px}.chip-value{font-size:17px;font-weight:800}
.quick-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}.quick-card{background:var(--surface2);border:1.5px solid var(--border);border-radius:var(--radius-lg);padding:18px;cursor:pointer;transition:all .2s;text-align:left}.quick-card:hover{background:var(--primary-light);border-color:var(--primary);transform:translateY(-2px)}.quick-icon{font-size:24px;margin-bottom:10px}.quick-title{font-size:13.5px;font-weight:700;margin-bottom:3px}.quick-desc{font-size:12px;color:var(--text3)}
.att-row{display:flex;align-items:center;gap:12px;padding:12px 0;border-bottom:1px solid var(--border)}.att-name{font-size:14px;font-weight:600;flex:1}
.att-btns{display:flex;gap:6px}.att-btn{padding:6px 14px;border-radius:6px;font-size:12px;font-weight:700;cursor:pointer;border:1.5px solid var(--border2);background:transparent;color:var(--text3);transition:.15s;font-family:var(--font)}
.att-btn.present{background:var(--success-bg);color:var(--success);border-color:var(--success-border)}.att-btn.absent{background:var(--danger-bg);color:var(--danger);border-color:var(--danger-border)}
@media(max-width:1024px){:root{--sidebar:0px}.sidebar{transform:translateX(-100%);width:280px}.sidebar.show{transform:translateX(0);box-shadow:var(--shadow-lg)}.sidebar-overlay.show{display:block}.main-content{margin-left:0}.menu-toggle{display:flex}.content-area{padding:20px 16px}.topbar{padding:0 16px}.grid-4{grid-template-columns:1fr 1fr}.grid-3{grid-template-columns:1fr 1fr}}
@media(max-width:640px){.grid-2,.grid-3,.grid-4{grid-template-columns:1fr}.welcome-banner{padding:22px 20px}.filter-bar{flex-direction:column;gap:10px}.section-header{flex-direction:column}.modal-overlay{padding:12px}.modal-body{padding:18px}.quick-grid{grid-template-columns:1fr}}
@media print{.sidebar,.topbar,.sidebar-overlay{display:none!important}.main-content{margin-left:0!important}.content-area{padding:0!important}.btn,.section-actions{display:none!important}}