:root {
  --a-blue: #1c3f60;
  --a-red: #ec1c24;
  --a-bg: #f3f5f8;
  --a-border: #e4e8ee;
  --a-ink: #232b36;
  --a-gray: #6b7684;
  --a-sidebar-w: 250px;
}
* { box-sizing: border-box; }
body { margin: 0; font-family: "Inter", "Segoe UI", Arial, sans-serif; background: var(--a-bg); color: var(--a-ink); }
a { color: var(--a-blue); text-decoration: none; }
img { max-width: 100%; }

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

.admin-sidebar {
  width: var(--a-sidebar-w); background: #182635; color: #cfd9e5; flex-shrink: 0;
  display: flex; flex-direction: column; position: sticky; top: 0; height: 100vh;
}
.admin-brand { display: flex; align-items: center; gap: 10px; padding: 20px 18px; border-bottom: 1px solid rgba(255,255,255,.08); }
.admin-brand img { height: 34px; background: #fff; border-radius: 6px; padding: 3px; }
.admin-brand strong { display: block; color: #fff; font-size: 1rem; }
.admin-brand span { display: block; font-size: .72rem; color: #8ea0b5; text-transform: uppercase; letter-spacing: .05em; }

.admin-nav { flex: 1; padding: 14px 10px; overflow-y: auto; }
.admin-nav a {
  display: flex; align-items: center; gap: 10px; color: #cfd9e5; padding: 11px 14px;
  border-radius: 8px; font-size: .92rem; font-weight: 500; margin-bottom: 2px;
}
.admin-nav a i { width: 18px; text-align: center; }
.admin-nav a:hover { background: rgba(255,255,255,.06); color: #fff; }
.admin-nav a.active { background: var(--a-red); color: #fff; }

.admin-sidebar-footer { padding: 14px 10px; border-top: 1px solid rgba(255,255,255,.08); }
.admin-sidebar-footer a { display: flex; align-items: center; gap: 10px; color: #cfd9e5; padding: 10px 14px; font-size: .88rem; }
.admin-sidebar-footer a:hover { color: #fff; }

.admin-main { flex: 1; min-width: 0; }
.admin-topbar {
  background: #fff; border-bottom: 1px solid var(--a-border); padding: 16px 26px;
  display: flex; align-items: center; gap: 16px; position: sticky; top: 0; z-index: 5;
}
.admin-topbar h1 { font-size: 1.2rem; margin: 0; flex: 1; }
.admin-user { font-size: .88rem; color: var(--a-gray); display: flex; align-items: center; gap: 8px; }
.admin-menu-toggle { display: none; background: none; border: 1px solid var(--a-border); border-radius: 6px; width: 36px; height: 36px; cursor: pointer; }

.admin-content { padding: 26px; max-width: 1200px; }

.alert { padding: 13px 16px; border-radius: 8px; margin-bottom: 20px; font-size: .92rem; }
.alert-success { background: #e8f7ee; color: #1c7a3f; border: 1px solid #bfe8cd; }
.alert-error { background: #fdeeee; color: #a3141a; border: 1px solid #f6c7c9; }

.card { background: #fff; border: 1px solid var(--a-border); border-radius: 10px; padding: 22px 24px; margin-bottom: 22px; }
.card h2 { font-size: 1.05rem; margin: 0 0 16px; }

.page-toolbar { display: flex; justify-content: space-between; align-items: center; margin-bottom: 18px; gap: 12px; flex-wrap: wrap; }
.page-toolbar p { margin: 0; color: var(--a-gray); font-size: .9rem; }

.btn {
  display: inline-flex; align-items: center; gap: 8px; padding: 10px 18px; border-radius: 7px;
  font-weight: 600; font-size: .88rem; border: 1px solid transparent; cursor: pointer; background: #eef1f5; color: var(--a-ink);
}
.btn-primary { background: var(--a-red); color: #fff; }
.btn-primary:hover { background: #c8151c; color: #fff; }
.btn-blue { background: var(--a-blue); color: #fff; }
.btn-blue:hover { background: #142c46; color: #fff; }
.btn-outline { background: #fff; border-color: var(--a-border); color: var(--a-ink); }
.btn-outline:hover { border-color: var(--a-blue); color: var(--a-blue); }
.btn-sm { padding: 6px 12px; font-size: .8rem; }
.btn-danger { background: #fdeeee; color: #a3141a; }
.btn-danger:hover { background: #f6c7c9; }

table.admin-table { width: 100%; border-collapse: collapse; background: #fff; }
table.admin-table th, table.admin-table td { padding: 12px 14px; border-bottom: 1px solid var(--a-border); text-align: left; font-size: .9rem; vertical-align: middle; }
table.admin-table th { background: #f8f9fb; font-size: .78rem; text-transform: uppercase; letter-spacing: .03em; color: var(--a-gray); }
table.admin-table tr:last-child td { border-bottom: none; }
table.admin-table img.thumb { width: 56px; height: 42px; object-fit: cover; border-radius: 6px; border: 1px solid var(--a-border); }
.table-actions { display: flex; gap: 8px; }
.badge { display: inline-block; padding: 3px 10px; border-radius: 20px; font-size: .74rem; font-weight: 700; }
.badge-active { background: #e8f7ee; color: #1c7a3f; }
.badge-inactive { background: #f1f2f4; color: #6b7684; }
.badge-unread { background: #fdeeee; color: #a3141a; }
.badge-read { background: #f1f2f4; color: #6b7684; }

.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-grid .full { grid-column: 1 / -1; }
.f-group { display: flex; flex-direction: column; gap: 6px; margin-bottom: 16px; }
.f-group label { font-size: .85rem; font-weight: 600; }
.f-group label .req { color: var(--a-red); }
.f-group input[type=text], .f-group input[type=password], .f-group input[type=email], .f-group input[type=number],
.f-group input[type=url], .f-group select, .f-group textarea {
  border: 1px solid var(--a-border); border-radius: 7px; padding: 10px 12px; font-family: inherit; font-size: .92rem; width: 100%;
}
.f-group textarea { resize: vertical; }
.f-group .hint { font-size: .78rem; color: var(--a-gray); }
.f-group input[type=file] { font-size: .85rem; }
.current-image { display: flex; align-items: center; gap: 10px; margin-bottom: 8px; }
.current-image img { width: 90px; height: 68px; object-fit: cover; border-radius: 6px; border: 1px solid var(--a-border); }

.rte-wrap { border: 1px solid var(--a-border); border-radius: 7px; overflow: hidden; margin-bottom: 4px; }
.rte-toolbar { display: flex; gap: 4px; background: #f8f9fb; border-bottom: 1px solid var(--a-border); padding: 6px; }
.rte-toolbar button { width: 30px; height: 30px; border: none; background: transparent; border-radius: 5px; cursor: pointer; color: var(--a-ink); }
.rte-toolbar button:hover { background: #e4e8ee; }
.rte-editable { min-height: 160px; padding: 12px 14px; font-size: .92rem; line-height: 1.6; }
.rte-editable:focus { outline: none; }
.rte-editable p { margin: 0 0 .8em; }

.login-shell { min-height: 100vh; display: flex; align-items: center; justify-content: center; background: linear-gradient(120deg,#1c3f60,#0e1f30); padding: 20px; }
.login-card { background: #fff; border-radius: 12px; padding: 40px 34px; width: 100%; max-width: 380px; box-shadow: 0 20px 60px rgba(0,0,0,.3); }
.login-card img { height: 50px; display: block; margin: 0 auto 8px; }
.login-card h1 { text-align: center; font-size: 1.2rem; margin: 0 0 4px; }
.login-card .sub { text-align: center; color: var(--a-gray); font-size: .85rem; margin-bottom: 24px; }
.login-card .btn { width: 100%; justify-content: center; padding: 12px; margin-top: 8px; }

.empty-state { text-align: center; padding: 50px 20px; color: var(--a-gray); }
.empty-state i { font-size: 2rem; margin-bottom: 12px; display: block; }

.stat-cards { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; margin-bottom: 24px; }
.stat-card { background: #fff; border: 1px solid var(--a-border); border-radius: 10px; padding: 20px; }
.stat-card .num { font-size: 1.8rem; font-weight: 800; color: var(--a-blue); }
.stat-card .lbl { font-size: .85rem; color: var(--a-gray); }
.stat-card i { color: var(--a-red); font-size: 1.2rem; float: right; }

@media (max-width: 900px) {
  .admin-sidebar { position: fixed; left: -260px; top: 0; z-index: 50; transition: left .2s ease; }
  .admin-shell.sidebar-open .admin-sidebar { left: 0; }
  .admin-menu-toggle { display: block; }
  .form-grid, .stat-cards { grid-template-columns: 1fr; }
}