/* ═══════════════════════════════════════════════
   明沣科技 - 管理后台 Styles
   ═══════════════════════════════════════════════ */

:root {
  --primary: #1A6DFF;
  --primary-light: #4A8DFF;
  --bg-sidebar: #0F1D35;
  --bg-main: #F5F8FC;
  --text-primary: #1A2332;
  --text-body: #2D3748;
  --text-muted: #8899AA;
  --border: #E8EDF2;
  --shadow: 0 2px 12px rgba(0,0,0,0.04);
  --radius: 10px;
}

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

body {
  font-family: 'Inter', 'Noto Sans SC', -apple-system, sans-serif;
  background: var(--bg-main);
  color: var(--text-body);
}

.admin-layout {
  display: flex;
  min-height: 100vh;
}

/* ─── Sidebar ─── */
.admin-sidebar {
  width: 240px;
  background: var(--bg-sidebar);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 100;
}

.sidebar-header {
  padding: 20px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

.sidebar-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

.sidebar-logo span {
  font-size: 18px;
  font-weight: 700;
  color: white;
  letter-spacing: 0.5px;
}

.sidebar-nav {
  flex: 1;
  display: flex;
  flex-direction: column;
  padding: 16px 12px;
  gap: 2px;
}

.sidebar-nav a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border-radius: 8px;
  color: rgba(255,255,255,0.6);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  transition: all 0.2s;
}

.sidebar-nav a:hover {
  background: rgba(255,255,255,0.06);
  color: white;
}

.sidebar-nav a.active {
  background: rgba(26,109,255,0.2);
  color: white;
  font-weight: 600;
}

/* ─── Main ─── */
.admin-main {
  flex: 1;
  margin-left: 240px;
  padding: 32px;
  min-height: 100vh;
}

/* ─── Page Header ─── */
.page-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 28px;
}

.page-header h1 {
  font-size: 24px;
  font-weight: 800;
  color: var(--text-primary);
}

.page-header p {
  font-size: 14px;
  color: var(--text-muted);
  margin-top: 4px;
}

/* ─── Cards ─── */
.card {
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.card-body { padding: 20px; }

/* ─── Stat Cards ─── */
.stats-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 28px;
}

.stat-card {
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
}

.stat-card .stat-value {
  font-size: 32px;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 4px;
}

.stat-card .stat-label {
  font-size: 14px;
  color: var(--text-muted);
}

.stat-card .stat-sub {
  font-size: 12px;
  color: #10B981;
  margin-top: 8px;
}

/* ─── Table ─── */
.table-wrap {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

thead th {
  text-align: left;
  padding: 12px 16px;
  font-weight: 600;
  color: var(--text-muted);
  border-bottom: 2px solid var(--border);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

tbody td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  color: var(--text-body);
}

tbody tr:hover {
  background: #FAFBFE;
}

/* ─── Buttons ─── */
.admin-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 18px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  text-decoration: none;
  transition: all 0.2s;
  font-family: inherit;
}

.admin-btn-primary {
  background: var(--primary);
  color: white;
}
.admin-btn-primary:hover { background: var(--primary-light); }

.admin-btn-danger {
  background: #FEE2E2;
  color: #DC2626;
}
.admin-btn-danger:hover { background: #FECACA; }

.admin-btn-outline {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-body);
}
.admin-btn-outline:hover { border-color: var(--primary); color: var(--primary); }

/* ─── Badges ─── */
.badge-category {
  display: inline-block;
  padding: 2px 8px;
  background: rgba(26,109,255,0.08);
  color: var(--primary);
  border-radius: 4px;
  font-size: 12px;
  font-weight: 500;
}

/* ─── Empty State ─── */
.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-muted);
}
.empty-state svg { margin-bottom: 16px; opacity: 0.3; }
.empty-state p { font-size: 14px; }

/* ─── Login Page ─── */
.login-page {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  background: linear-gradient(160deg, #E8F4FD, #F0F7FF);
}

.login-box {
  background: white;
  padding: 48px 40px 40px;
  border-radius: 16px;
  box-shadow: 0 8px 40px rgba(26,109,255,0.10);
  width: 400px;
  max-width: 90vw;
  text-align: center;
}

.login-box h1 {
  font-size: 22px;
  font-weight: 800;
  margin: 16px 0 4px;
  color: var(--text-primary);
}

.login-box p {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 28px;
}

.login-box .form-group {
  text-align: left;
  margin-bottom: 20px;
}

.login-box label {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 6px;
  display: block;
}

.login-box input {
  width: 100%;
  padding: 12px 16px;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  outline: none;
  transition: all 0.2s;
}

.login-box input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(26,109,255,0.10);
}

.login-box .admin-btn {
  width: 100%;
  justify-content: center;
  padding: 12px;
  font-size: 14px;
}

.login-error {
  background: #FEE2E2;
  color: #DC2626;
  padding: 10px 16px;
  border-radius: 8px;
  font-size: 13px;
  display: none;
  margin-bottom: 16px;
}

/* ─── Toast ─── */
.toast {
  position: fixed;
  top: 24px;
  right: 24px;
  padding: 12px 24px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  z-index: 999;
  opacity: 0;
  transform: translateY(-10px);
  transition: all 0.3s;
  box-shadow: 0 4px 20px rgba(0,0,0,0.10);
}

.toast.show { opacity: 1; transform: translateY(0); }
.toast.success { background: #D1FAE5; color: #065F46; }
.toast.error { background: #FEE2E2; color: #991B1B; }

/* ─── Form ─── */
.form-card {
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  max-width: 640px;
  box-shadow: var(--shadow);
}

.form-card .form-group {
  margin-bottom: 20px;
}

.form-card label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-body);
  margin-bottom: 6px;
}

.form-card input,
.form-card textarea,
.form-card select {
  width: 100%;
  padding: 10px 14px;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  outline: none;
  font-family: inherit;
  transition: all 0.2s;
}

.form-card input:focus,
.form-card textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(26,109,255,0.08);
}

.form-card textarea { resize: vertical; min-height: 100px; }

.form-actions {
  display: flex;
  gap: 12px;
  margin-top: 24px;
}

/* ─── Responsive ─── */
@media (max-width: 768px) {
  .admin-sidebar { width: 60px; }
  .admin-sidebar .sidebar-logo span { display: none; }
  .admin-sidebar .sidebar-nav a span { display: none; }
  .admin-main { margin-left: 60px; padding: 20px; }
  .stats-row { grid-template-columns: 1fr; }
}