:root {
  --ink: #0a121f;
  --navy-950: #030d1f;
  --accent-900: #051733;
  --accent: #0a3d8f;
  --flame: #ff6a00;
  --flame-600: #d65600;
  --flame-100: #ffe7d3;
  --divider: #d7dee7;
  --surface: #eef2f7;
  --bg: #f5f7fa;
  --danger: #d92d20;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--ink);
  font-size: 15px;
  line-height: 1.5;
}
a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--flame-600); }

.admin-shell { display: flex; min-height: 100vh; }
.admin-sidebar {
  width: 230px; flex: none; background: var(--navy-950); color: #fff;
  padding: 24px 0; display: flex; flex-direction: column;
}
.admin-brand { padding: 0 20px 20px; font-weight: 700; font-size: 17px; border-bottom: 1px solid rgba(255,255,255,.1); margin-bottom: 12px; }
.admin-brand span { display: block; font-size: 12px; font-weight: 400; color: #9db3cc; margin-top: 2px; }
.admin-nav { display: flex; flex-direction: column; flex: 1; }
.admin-nav a {
  padding: 12px 20px; color: #c3d2e6; font-weight: 600; font-size: 14px;
  border-left: 3px solid transparent;
}
.admin-nav a:hover { background: rgba(255,255,255,.06); color: #fff; }
.admin-nav a.active { background: rgba(255,106,0,.12); border-left-color: var(--flame); color: #fff; }
.admin-nav-footer { padding: 12px 20px; border-top: 1px solid rgba(255,255,255,.1); margin-top: 12px; }
.admin-nav-footer a { color: #c3d2e6; font-size: 13px; font-weight: 600; }

.admin-main { flex: 1; padding: 28px 32px; max-width: 1100px; }
.admin-topbar { display: flex; align-items: center; justify-content: space-between; margin-bottom: 24px; }
.admin-topbar h1 { font-size: 22px; font-weight: 700; }
.admin-topbar .muted { color: #5b6b84; font-size: 13px; }

.card { background: #fff; border: 1px solid var(--divider); border-radius: 10px; padding: 22px; margin-bottom: 20px; }
.card h2 { font-size: 16px; margin-bottom: 14px; }

.btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 9px 16px; border-radius: 8px; font-weight: 700; font-size: 13.5px;
  border: none; cursor: pointer; text-decoration: none;
}
.btn-primary { background: var(--flame); color: #fff; }
.btn-primary:hover { background: var(--flame-600); color: #fff; }
.btn-secondary { background: var(--surface); color: var(--ink); }
.btn-secondary:hover { background: #e2e8f0; color: var(--ink); }
.btn-danger { background: #fff; color: var(--danger); border: 1px solid var(--danger); }
.btn-danger:hover { background: var(--danger); color: #fff; }
.btn-sm { padding: 6px 12px; font-size: 12.5px; }

table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--divider); font-size: 14px; vertical-align: middle; }
th { font-size: 12px; text-transform: uppercase; letter-spacing: .04em; color: #5b6b84; font-weight: 700; }
tr:hover td { background: #fafbfc; }
.table-thumb { width: 56px; height: 56px; object-fit: cover; border-radius: 6px; background: var(--surface); }
.table-actions { display: flex; gap: 8px; white-space: nowrap; }
.empty-row td { color: #8390a2; text-align: center; padding: 32px; }

.rich-editor { border: 1.5px solid var(--divider); border-radius: 8px; overflow: hidden; }
.rich-editor-toolbar { display: flex; flex-wrap: wrap; gap: 4px; padding: 8px; background: var(--surface); border-bottom: 1.5px solid var(--divider); }
.rich-editor-btn {
  padding: 6px 10px; font-size: 12.5px; font-weight: 700; border: 1px solid var(--divider);
  border-radius: 6px; background: #fff; color: var(--ink); cursor: pointer;
}
.rich-editor-btn:hover { background: var(--flame-100); border-color: var(--flame); }
.rich-editor-content {
  min-height: 220px; padding: 14px 16px; font-size: 14.5px; line-height: 1.6; outline: none;
}
.rich-editor-content p { margin-bottom: 12px; }
.rich-editor-content h3 { font-size: 18px; font-weight: 700; margin: 10px 0 8px; }
.rich-editor-content ul, .rich-editor-content ol { padding-left: 22px; margin-bottom: 12px; }

.form-grid { display: grid; gap: 16px; max-width: 640px; }
.field { display: grid; gap: 6px; }
.field label { font-weight: 700; font-size: 13px; }
.field .hint { font-size: 12px; color: #8390a2; font-weight: 400; }
input[type=text], input[type=date], input[type=number], input[type=password], input[type=file], select, textarea {
  width: 100%; padding: 10px 12px; border: 1.5px solid var(--divider); border-radius: 8px;
  font: inherit; font-size: 14px; color: var(--ink); background: #fff;
}
textarea { min-height: 120px; resize: vertical; font-family: 'Consolas', monospace; font-size: 13px; }
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--accent); }
.current-image { display: flex; align-items: center; gap: 10px; margin-bottom: 4px; }
.current-image img { width: 70px; height: 70px; object-fit: cover; border-radius: 8px; border: 1px solid var(--divider); }

.alert { padding: 12px 16px; border-radius: 8px; margin-bottom: 20px; font-size: 14px; font-weight: 600; }
.alert-success { background: #e6f7ec; color: #14804a; }
.alert-error { background: #fdecea; color: var(--danger); }

.login-page { min-height: 100vh; display: flex; align-items: center; justify-content: center; background: var(--navy-950); }
.login-card { background: #fff; border-radius: 14px; padding: 36px 32px; width: 100%; max-width: 380px; }
.login-card h1 { font-size: 20px; margin-bottom: 4px; }
.login-card p.muted { color: #5b6b84; font-size: 13px; margin-bottom: 20px; }
.login-card .field { margin-bottom: 14px; }
.login-card .btn { width: 100%; justify-content: center; margin-top: 6px; }

.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 16px; margin-bottom: 24px; }
.stat-card { background: #fff; border: 1px solid var(--divider); border-radius: 10px; padding: 18px 20px; }
.stat-card .num { font-size: 28px; font-weight: 700; color: var(--accent-900); }
.stat-card .label { font-size: 13px; color: #5b6b84; font-weight: 600; margin-top: 2px; }
.stat-card a { display: block; margin-top: 8px; font-size: 13px; font-weight: 700; }

/* ===== Mobile ===== */
@media (max-width: 860px) {
  .admin-shell { flex-direction: column; min-height: 0; }
  .admin-sidebar { width: 100%; padding: 0; position: sticky; top: 0; z-index: 20; }
  .admin-brand { padding: 14px 16px; font-size: 15px; border-bottom: none; margin-bottom: 0; }
  .admin-nav {
    flex-direction: row; flex: none; overflow-x: auto; -webkit-overflow-scrolling: touch;
    border-top: 1px solid rgba(255,255,255,.1); border-bottom: 1px solid rgba(255,255,255,.1);
  }
  .admin-nav a {
    padding: 12px 16px; white-space: nowrap; border-left: none; flex: none;
    border-bottom: 3px solid transparent;
  }
  .admin-nav a.active { border-left: none; border-bottom-color: var(--flame); background: rgba(255,106,0,.12); }
  .admin-nav-footer {
    display: flex; gap: 16px; padding: 10px 16px; border-top: none; margin-top: 0;
    overflow-x: auto; white-space: nowrap; -webkit-overflow-scrolling: touch;
  }
  .admin-nav-footer br { display: none; }

  .admin-main { padding: 18px 16px; max-width: 100%; }
  .admin-topbar { flex-direction: column; align-items: stretch; gap: 12px; }
  .admin-topbar h1 { font-size: 19px; }
  .admin-topbar > .btn, .admin-topbar > a.btn { width: 100%; justify-content: center; }

  .card { padding: 16px; }
  .card:has(table) { overflow-x: auto; -webkit-overflow-scrolling: touch; }
  table { min-width: 560px; }

  .form-grid { max-width: 100%; }
  .stat-grid { grid-template-columns: repeat(2, 1fr); }
  .login-card { margin: 16px; padding: 28px 22px; }
  .rich-editor-content { min-height: 160px; }
}

@media (max-width: 420px) {
  .stat-grid { grid-template-columns: 1fr; }
  .table-actions { flex-wrap: wrap; }
}