/* ═══════════════════════════════════════════════════════════════
   Nova Tuber Admin — Professional Design System
   ═══════════════════════════════════════════════════════════════ */

:root {
  --gray-50:  #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;
  --brand-50:  #eff6ff;
  --brand-100: #dbeafe;
  --brand-500: #3b82f6;
  --brand-600: #2563eb;
  --brand-700: #1d4ed8;
  --green-50:  #f0fdf4;
  --green-500: #22c55e;
  --green-600: #16a34a;
  --green-700: #15803d;
  --amber-50:  #fffbeb;
  --amber-500: #f59e0b;
  --amber-600: #d97706;
  --red-50:    #fef2f2;
  --red-500:   #ef4444;
  --red-600:   #dc2626;
  --shadow-sm: 0 1px 2px rgba(0,0,0,.05);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,.07), 0 2px 4px -2px rgba(0,0,0,.05);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,.08), 0 4px 6px -4px rgba(0,0,0,.04);
  --radius: 8px;
  --radius-lg: 12px;
  --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'SF Mono', 'Cascadia Code', Consolas, monospace;
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}

body.admin-body {
  font-family: var(--font);
  background: var(--gray-50);
  color: var(--gray-900);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

/* ── Topbar ──────────────────────────────── */
.admin-topbar {
  display: flex; align-items: center; justify-content: space-between;
  height: 48px; padding: 0 20px;
  background: #fff; border-bottom: 1px solid var(--gray-200);
  position: sticky; top: 0; z-index: 100;
}
.admin-topbar__left { display: flex; align-items: center; gap: 8px; }
.admin-topbar__brand { font-weight: 700; font-size: 15px; color: var(--gray-900); }
.admin-topbar__badge {
  font-size: 11px; font-weight: 600; text-transform: uppercase; letter-spacing: .5px;
  background: var(--brand-100); color: var(--brand-700);
  padding: 2px 8px; border-radius: 4px;
}
.admin-topbar__right { display: flex; align-items: center; gap: 12px; font-size: 13px; }
.admin-topbar__session { color: var(--gray-500); }
.admin-dot { font-size: 12px; }
.admin-dot--checking { color: var(--gray-400); }

/* ── Login ────────────────────────────────── */
.admin-login-view {
  display: flex; align-items: center; justify-content: center;
  min-height: calc(100vh - 48px); padding: 40px 20px;
}
.admin-login-card {
  background: #fff; border: 1px solid var(--gray-200); border-radius: var(--radius-lg);
  padding: 32px; width: 100%; max-width: 380px; box-shadow: var(--shadow-md);
}
.admin-login-card h2 { font-size: 18px; font-weight: 600; margin-bottom: 20px; }

/* ── Navigation ───────────────────────────── */
.admin-nav {
  display: flex; gap: 0;
  background: #fff; border-bottom: 1px solid var(--gray-200);
  padding: 0 20px;
}
.admin-nav__tab {
  display: flex; align-items: center; gap: 6px;
  padding: 12px 16px; border: none; background: none;
  font-size: 13px; font-weight: 500; color: var(--gray-500); cursor: pointer;
  border-bottom: 2px solid transparent; margin-bottom: -1px;
  transition: color .15s, border-color .15s;
}
.admin-nav__tab:hover { color: var(--gray-700); }
.admin-nav__tab.active { color: var(--brand-600); border-bottom-color: var(--brand-600); }
.admin-nav__icon { font-size: 14px; }

/* ── Main Content ─────────────────────────── */
.admin-main { max-width: 1200px; margin: 0 auto; padding: 24px 20px; }

/* ── Tab Panels ───────────────────────────── */
.admin-tab-panel { display: none; }
.admin-tab-panel.active { display: block; }
[hidden] { display: none !important; }

/* ── Page Header ──────────────────────────── */
.admin-page-header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 20px;
}
.admin-page-header h2 { font-size: 20px; font-weight: 600; }

/* ── Buttons ──────────────────────────────── */
.admin-btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 8px 16px; border-radius: 6px; font-size: 13px; font-weight: 500;
  border: 1px solid transparent; cursor: pointer; transition: all .15s;
  font-family: inherit; line-height: 1.4;
}
.admin-btn--primary { background: var(--brand-600); color: #fff; }
.admin-btn--primary:hover { background: var(--brand-700); }
.admin-btn--outline { background: #fff; border-color: var(--gray-300); color: var(--gray-700); }
.admin-btn--outline:hover { background: var(--gray-50); border-color: var(--gray-400); }
.admin-btn--ghost { background: none; color: var(--gray-500); }
.admin-btn--ghost:hover { color: var(--gray-700); background: var(--gray-100); }
.admin-btn--full { width: 100%; justify-content: center; }
.admin-btn--sm { padding: 4px 10px; font-size: 12px; }

/* ── KPI Cards ────────────────────────────── */
.admin-kpi-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px;
  margin-bottom: 24px;
}
.admin-kpi {
  background: #fff; border: 1px solid var(--gray-200); border-radius: var(--radius);
  padding: 20px; box-shadow: var(--shadow-sm);
}
.admin-kpi__value { font-size: 28px; font-weight: 700; color: var(--gray-900); line-height: 1.2; }
.admin-kpi__label { font-size: 13px; color: var(--gray-500); margin-top: 4px; }

/* ── Sections ─────────────────────────────── */
.admin-section { margin-bottom: 24px; }
.admin-section__title { font-size: 14px; font-weight: 600; color: var(--gray-600); margin-bottom: 12px; }

/* ── Table ────────────────────────────────── */
.admin-table-wrapper {
  background: #fff; border: 1px solid var(--gray-200); border-radius: var(--radius);
  overflow: hidden; box-shadow: var(--shadow-sm);
}
.admin-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.admin-table thead { background: var(--gray-50); }
.admin-table th {
  text-align: left; padding: 10px 16px; font-weight: 600; font-size: 12px;
  color: var(--gray-500); text-transform: uppercase; letter-spacing: .5px;
  border-bottom: 1px solid var(--gray-200);
}
.admin-table td { padding: 12px 16px; border-bottom: 1px solid var(--gray-100); color: var(--gray-700); }
.admin-table tbody tr { cursor: pointer; transition: background .1s; }
.admin-table tbody tr:hover { background: var(--brand-50); }
.admin-table tbody tr.expanded { background: var(--brand-50); }
.admin-table tbody tr:last-child td { border-bottom: none; }

/* ── Detail Row (expandable) ──────────────── */
.admin-detail-row { background: var(--gray-50); }
.admin-detail-row td { padding: 0 !important; }
.admin-detail-card {
  padding: 16px 20px; display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 16px;
}
.admin-detail-card h4 {
  font-size: 13px; font-weight: 600; color: var(--gray-500);
  text-transform: uppercase; letter-spacing: .5px; margin-bottom: 8px;
}
.admin-detail-card dl { display: grid; gap: 4px; font-size: 13px; }
.admin-detail-card dt { color: var(--gray-400); font-weight: 500; }
.admin-detail-card dd { color: var(--gray-700); font-weight: 500; }

/* ── Badges ────────────────────────────────── */
.admin-badge {
  display: inline-flex; align-items: center;
  padding: 2px 8px; border-radius: 100px; font-size: 11px; font-weight: 600;
  text-transform: uppercase; letter-spacing: .3px;
}
.admin-badge--active { background: var(--green-50); color: var(--green-700); }
.admin-badge--inactive { background: var(--gray-100); color: var(--gray-500); }
.admin-badge--expired { background: var(--red-50); color: var(--red-600); }
.admin-badge--pro { background: var(--brand-50); color: var(--brand-700); }
.admin-badge--enterprise { background: #faf5ff; color: #7e22ce; }
.admin-badge--standard { background: var(--gray-100); color: var(--gray-600); }

/* ── Card ─────────────────────────────────── */
.admin-card {
  background: #fff; border: 1px solid var(--gray-200); border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}
.admin-card__body { padding: 20px; }

/* ── Fields ───────────────────────────────── */
.admin-field { display: flex; flex-direction: column; gap: 4px; flex: 1; }
.admin-field label { font-size: 12px; font-weight: 600; color: var(--gray-500); text-transform: uppercase; letter-spacing: .3px; }
.admin-field--inline { flex-direction: row; align-items: center; gap: 8px; flex: none; }
.admin-field--inline label { white-space: nowrap; }
.admin-field-row { display: flex; gap: 12px; margin-bottom: 12px; }
.admin-input {
  padding: 8px 12px; border: 1px solid var(--gray-300); border-radius: 6px;
  font-size: 13px; font-family: inherit; color: var(--gray-900);
  background: #fff; transition: border-color .15s;
}
.admin-input:focus { outline: none; border-color: var(--brand-500); box-shadow: 0 0 0 3px var(--brand-100); }
select.admin-input { cursor: pointer; }

/* ── Toolbar ──────────────────────────────── */
.admin-toolbar { display: flex; align-items: flex-end; gap: 12px; margin-bottom: 16px; }

/* ── Portal Output ────────────────────────── */
.admin-portal-output { margin-top: 16px; }
.admin-portal-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 16px;
  margin-bottom: 16px;
}
.admin-portal-card {
  background: #fff; border: 1px solid var(--gray-200); border-radius: var(--radius);
  padding: 16px; box-shadow: var(--shadow-sm);
}
.admin-portal-card h3 { font-size: 14px; font-weight: 600; margin-bottom: 8px; color: var(--gray-800); }
.admin-portal-card p { font-size: 13px; color: var(--gray-600); margin-bottom: 4px; }
.admin-portal-card strong { color: var(--gray-900); }

/* ── Plans Grid ───────────────────────────── */
.admin-plans-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 16px;
}
.admin-plan-card {
  background: #fff; border: 1px solid var(--gray-200); border-radius: var(--radius-lg);
  padding: 24px; box-shadow: var(--shadow-sm); transition: box-shadow .15s;
}
.admin-plan-card:hover { box-shadow: var(--shadow-md); }
.admin-plan-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 4px; }
.admin-plan-card .admin-plan-code {
  font-size: 11px; color: var(--gray-400); text-transform: uppercase; letter-spacing: .5px;
  margin-bottom: 16px;
}
.admin-plan-stats { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin-bottom: 16px; }
.admin-plan-stat { font-size: 13px; }
.admin-plan-stat dt { font-size: 11px; color: var(--gray-400); text-transform: uppercase; }
.admin-plan-stat dd { font-weight: 600; color: var(--gray-700); }
.admin-plan-features { font-size: 12px; color: var(--gray-500); line-height: 1.8; }

/* ── Empty states ─────────────────────────── */
.admin-empty {
  text-align: center; padding: 32px 16px; color: var(--gray-400); font-size: 13px;
}

/* ── Responsive ───────────────────────────── */
@media (max-width: 768px) {
  .admin-kpi-grid { grid-template-columns: repeat(2, 1fr); }
  .admin-field-row { flex-direction: column; }
}