:root {
  --admin-bg: #101010;
  --admin-panel: #181818;
  --admin-panel-light: #202020;
  --admin-line: rgba(255,255,255,.1);
  --admin-muted: #9b9b9b;
  --admin-text: #f5f5f5;
  --admin-neon: #d4ff00;
  --admin-font: 'Inter', sans-serif;
  --admin-display: 'Syne', sans-serif;
}

* { box-sizing: border-box; }
body { margin: 0; min-height: 100vh; background: var(--admin-bg); color: var(--admin-text); font-family: var(--admin-font); }
a { color: inherit; text-decoration: none; }
button, input { font: inherit; }
[hidden] { display: none !important; }
.admin-shell { min-height: 100vh; }
.login-panel { width: min(100% - 48px, 460px); margin: 0 auto; padding: 8vh 0; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-size: .82rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; }
.brand-mark { display: grid; place-items: center; width: 34px; height: 34px; background: var(--admin-neon); color: #101010; font-weight: 800; }
.eyebrow { margin-top: 84px; color: var(--admin-neon); font-size: .7rem; font-weight: 700; letter-spacing: .16em; text-transform: uppercase; }
h1, h2 { font-family: var(--admin-display); letter-spacing: -.04em; }
.login-panel h1 { margin: 14px 0; font-size: clamp(2.5rem, 8vw, 4.5rem); line-height: .96; }
h1 span { color: var(--admin-neon); }
.muted { color: var(--admin-muted); line-height: 1.7; }
.auth-form { display: grid; gap: 10px; margin-top: 38px; }
label { margin-top: 12px; color: var(--admin-muted); font-size: .75rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; }
input { width: 100%; padding: 15px 16px; border: 1px solid var(--admin-line); background: var(--admin-panel); color: var(--admin-text); outline: none; }
input:focus { border-color: var(--admin-neon); }
.button { border: 0; padding: 14px 18px; cursor: pointer; font-weight: 700; letter-spacing: .05em; text-transform: uppercase; }
.button-primary { margin-top: 18px; background: var(--admin-neon); color: #101010; }
.button-primary:hover { background: #fff; }
.button-preview { border: 1px solid var(--admin-neon); background: transparent; color: var(--admin-neon); }
.button-preview:hover { background: var(--admin-neon); color: #101010; }
.button-quiet { margin-top: auto; border: 1px solid var(--admin-line); background: transparent; color: var(--admin-text); }
.form-message { min-height: 22px; color: #ff9a9a; font-size: .85rem; }
.setup-notice { margin-top: 30px; padding: 16px; border: 1px solid rgba(212,255,0,.35); color: var(--admin-neon); font-size: .82rem; line-height: 1.6; }
code { font-family: monospace; }
.dashboard { display: grid; grid-template-columns: 250px 1fr; min-height: 100vh; }
.sidebar { display: flex; flex-direction: column; padding: 30px 22px; border-right: 1px solid var(--admin-line); background: var(--admin-panel); }
.sidebar nav { display: grid; gap: 6px; margin-top: 70px; }
.nav-item { padding: 13px 14px; color: var(--admin-muted); font-size: .85rem; }
.nav-item:hover, .nav-item.active { background: var(--admin-panel-light); color: var(--admin-neon); }
.dashboard-content { width: min(100%, 1320px); padding: 50px clamp(24px, 5vw, 70px); }
.dashboard-header { display: flex; align-items: end; justify-content: space-between; gap: 20px; }
.dashboard-header .eyebrow { margin-top: 0; }
.dashboard-header h1 { margin: 10px 0 0; font-size: clamp(2rem, 5vw, 3.8rem); }
.account-chip { padding: 10px 13px; border: 1px solid var(--admin-line); color: var(--admin-muted); font-size: .75rem; }
.dashboard-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: 48px; }
.metric-card { padding: 24px; border: 1px solid var(--admin-line); background: var(--admin-panel); }
.metric-card span, .metric-card small { display: block; color: var(--admin-muted); font-size: .78rem; }
.metric-card strong { display: block; margin: 22px 0 8px; color: var(--admin-neon); font-family: var(--admin-display); font-size: 2.5rem; }
.empty-state { max-width: 700px; margin-top: 70px; padding: 45px; border: 1px dashed var(--admin-line); text-align: center; }
.empty-icon { margin: 0 auto 20px; width: 52px; height: 52px; display: grid; place-items: center; background: var(--admin-neon); color: #101010; font-weight: 800; }
.empty-state h2 { margin: 0; font-size: 2rem; }
.empty-state p { color: var(--admin-muted); line-height: 1.7; }
.students-section { margin-top: 70px; }
.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 20px; margin-bottom: 22px; }
.section-heading .eyebrow { margin-top: 0; }
.section-heading h2 { margin: 8px 0 0; font-size: 2rem; }
.demo-badge { padding: 8px 12px; border: 1px solid rgba(212,255,0,.4); color: var(--admin-neon); font-size: .72rem; font-weight: 700; text-transform: uppercase; }
.table-wrap { overflow-x: auto; border: 1px solid var(--admin-line); }
.students-table { width: 100%; min-width: 650px; border-collapse: collapse; background: var(--admin-panel); text-align: left; }
.students-table th, .students-table td { padding: 15px 18px; border-bottom: 1px solid var(--admin-line); font-size: .82rem; }
.students-table th { color: var(--admin-muted); font-size: .68rem; letter-spacing: .1em; text-transform: uppercase; }
.students-table td:first-child { font-weight: 600; }
.status-active { color: var(--admin-neon); }
.demo-note { color: var(--admin-muted); font-size: .78rem; }
.admin-section { margin-top: 70px; scroll-margin-top: 30px; }
.status-pending { color: #ffc857; }
.finance-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-bottom: 20px; }
.compact-table { margin-top: 20px; }
.team-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.team-card, .settings-card { border: 1px solid var(--admin-line); background: var(--admin-panel); }
.team-card { display: grid; gap: 8px; padding: 22px; }
.team-card strong { font-family: var(--admin-display); font-size: 1.25rem; }
.team-card span, .team-card small, .settings-card span { color: var(--admin-muted); font-size: .8rem; }
.settings-card { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; background: var(--admin-line); }
.settings-card div { display: grid; gap: 8px; padding: 22px; background: var(--admin-panel); }
.settings-card strong { font-size: .9rem; }
@media (max-width: 760px) {
  .dashboard { display: block; }
  .sidebar { min-height: auto; gap: 22px; }
  .sidebar nav { display: flex; overflow-x: auto; margin-top: 20px; }
  .button-quiet { margin-top: 0; align-self: flex-start; }
  .dashboard-header { align-items: flex-start; flex-direction: column; }
  .dashboard-grid { grid-template-columns: 1fr; }
  .empty-state { padding: 28px 20px; }
  .section-heading { align-items: flex-start; flex-direction: column; }
  .finance-grid, .team-grid, .settings-card { grid-template-columns: 1fr; }
}