/* ============================================
   ADMIN CMS - Đạm Phương Thư Trai
   ============================================ */

:root {
  --admin-bg: #f7f5f0;
  --admin-sidebar: #1c3a2e;
  --admin-sidebar-active: #2a4a3a;
  --admin-card: #ffffff;
  --admin-border: #e2dac8;
  --admin-text: #2a2826;
  --admin-text-muted: #6b6660;
  --admin-gold: #c9a961;
  --admin-gold-dark: #a88845;
  --admin-success: #2d7a4f;
  --admin-danger: #c0392b;
  --admin-warning: #d68a3c;
}

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

body.admin-body {
  font-family: 'Be Vietnam Pro', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--admin-bg);
  color: var(--admin-text);
  font-size: 14px;
}

.admin-layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  min-height: 100vh;
}

/* SIDEBAR */
.admin-sidebar {
  background: var(--admin-sidebar);
  color: #f5efe0;
  display: flex;
  flex-direction: column;
}

.admin-sidebar-header {
  padding: 1.5rem 1.25rem;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.admin-sidebar-header .logo-icon {
  width: 36px;
  height: 36px;
  background: var(--admin-gold);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--admin-sidebar);
  font-family: 'Playfair Display', serif;
  font-weight: bold;
  font-size: 1.1rem;
  flex-shrink: 0;
}

.admin-sidebar-header .logo-text {
  display: flex;
  flex-direction: column;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.05em;
}

.admin-sidebar-header .logo-text small {
  font-size: 0.7rem;
  font-weight: 400;
  opacity: 0.7;
  letter-spacing: 0.1em;
}

.admin-sidebar-nav {
  flex: 1;
  padding: 1rem 0;
  display: flex;
  flex-direction: column;
}

.admin-sidebar-nav a {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.7rem 1.25rem;
  color: #f5efe0;
  text-decoration: none;
  font-size: 0.85rem;
  transition: all 0.2s;
  border-left: 3px solid transparent;
}

.admin-sidebar-nav a:hover {
  background: rgba(255,255,255,0.05);
  color: var(--admin-gold);
}

.admin-sidebar-nav a.active {
  background: var(--admin-sidebar-active);
  border-left-color: var(--admin-gold);
  color: var(--admin-gold);
}

.admin-sidebar-nav a i {
  width: 18px;
  text-align: center;
}

.admin-sidebar-footer {
  padding: 1rem 1.25rem;
  border-top: 1px solid rgba(255,255,255,0.08);
  font-size: 0.8rem;
}

.admin-sidebar-footer a {
  color: #f5efe0;
  opacity: 0.7;
  text-decoration: none;
}
.admin-sidebar-footer a:hover { opacity: 1; color: var(--admin-gold); }

/* MAIN AREA */
.admin-main {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  overflow-x: auto;
}

.admin-header {
  background: var(--admin-card);
  padding: 1rem 2rem;
  border-bottom: 1px solid var(--admin-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.admin-header h1 {
  font-family: 'Playfair Display', serif;
  font-size: 1.3rem;
  color: var(--admin-sidebar);
}

.admin-user {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: var(--admin-text-muted);
}

.admin-content {
  padding: 2rem;
  flex: 1;
}

/* STAT CARDS */
.stat-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 1rem;
  margin-bottom: 2rem;
}

.stat-card {
  background: var(--admin-card);
  border: 1px solid var(--admin-border);
  border-radius: 8px;
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.stat-card-label {
  font-size: 0.78rem;
  color: var(--admin-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.stat-card-value {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--admin-sidebar);
  font-family: 'Playfair Display', serif;
}

.stat-card i {
  color: var(--admin-gold-dark);
  font-size: 1rem;
}

/* CARDS */
.card {
  background: var(--admin-card);
  border: 1px solid var(--admin-border);
  border-radius: 8px;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.25rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--admin-border);
}

.card-header h2 {
  font-family: 'Playfair Display', serif;
  font-size: 1.05rem;
  color: var(--admin-sidebar);
}

/* TABLES */
.table {
  width: 100%;
  border-collapse: collapse;
}

.table th, .table td {
  text-align: left;
  padding: 0.75rem 0.85rem;
  border-bottom: 1px solid var(--admin-border);
  font-size: 0.85rem;
}

.table th {
  background: #f7f3eb;
  color: var(--admin-text-muted);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-size: 0.72rem;
}

.table tbody tr:hover {
  background: #faf6ec;
}

.table img.thumb {
  width: 48px;
  height: 48px;
  object-fit: cover;
  border-radius: 4px;
  border: 1px solid var(--admin-border);
}

/* BUTTONS */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: var(--admin-sidebar);
  color: #f5efe0;
  border: none;
  padding: 0.55rem 1rem;
  border-radius: 4px;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.2s;
  font-family: inherit;
}

.btn:hover { background: #122520; color: var(--admin-gold); }

.btn-primary {
  background: var(--admin-gold);
  color: var(--admin-sidebar);
}
.btn-primary:hover { background: var(--admin-gold-dark); color: #fff; }

.btn-secondary {
  background: transparent;
  color: var(--admin-sidebar);
  border: 1px solid var(--admin-border);
}
.btn-secondary:hover { background: #f7f3eb; }

.btn-danger {
  background: var(--admin-danger);
  color: #fff;
}
.btn-danger:hover { background: #a02b1f; }

.btn-success { background: var(--admin-success); color: #fff; }
.btn-warning { background: var(--admin-warning); color: #fff; }

.btn-sm {
  padding: 0.35rem 0.7rem;
  font-size: 0.75rem;
}

.btn-icon {
  padding: 0.4rem 0.6rem;
}

/* FORMS */
.form-row {
  display: grid;
  gap: 1rem;
  margin-bottom: 1rem;
}

.form-row-2 { grid-template-columns: 1fr 1fr; }
.form-row-3 { grid-template-columns: 1fr 1fr 1fr; }
.form-row-4 { grid-template-columns: 1fr 1fr 1fr 1fr; }

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.form-group label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--admin-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="password"],
.form-group input[type="number"],
.form-group input[type="url"],
.form-group input[type="date"],
.form-group input[type="file"],
.form-group select,
.form-group textarea {
  padding: 0.6rem 0.8rem;
  border: 1px solid var(--admin-border);
  border-radius: 4px;
  background: #fff;
  font-size: 0.88rem;
  font-family: inherit;
  color: var(--admin-text);
  width: 100%;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--admin-gold);
  box-shadow: 0 0 0 3px rgba(201, 169, 97, 0.15);
}

.form-group textarea {
  min-height: 120px;
  resize: vertical;
  line-height: 1.5;
}

.form-group textarea.large { min-height: 240px; }

.form-group input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--admin-gold);
  margin-right: 0.4rem;
}

.checkbox-label {
  display: flex;
  align-items: center;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--admin-text);
  text-transform: none !important;
  letter-spacing: normal !important;
  cursor: pointer;
}

.form-actions {
  display: flex;
  gap: 0.75rem;
  justify-content: flex-end;
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--admin-border);
}

.help-text {
  font-size: 0.78rem;
  color: var(--admin-text-muted);
  margin-top: 0.25rem;
}

/* BADGES */
.badge {
  display: inline-block;
  padding: 0.15rem 0.55rem;
  border-radius: 12px;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.badge-success { background: rgba(45, 122, 79, 0.12); color: var(--admin-success); }
.badge-warning { background: rgba(214, 138, 60, 0.15); color: var(--admin-warning); }
.badge-danger { background: rgba(192, 57, 43, 0.12); color: var(--admin-danger); }
.badge-info { background: rgba(28, 58, 46, 0.1); color: var(--admin-sidebar); }
.badge-gold { background: rgba(201, 169, 97, 0.2); color: var(--admin-gold-dark); }
.badge-gray { background: #ece7da; color: var(--admin-text-muted); }

/* TABS */
.admin-tabs {
  display: flex;
  gap: 0;
  border-bottom: 2px solid var(--admin-border);
  margin-bottom: 1.5rem;
  overflow-x: auto;
}

.admin-tab {
  background: transparent;
  border: none;
  padding: 0.8rem 1.25rem;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.85rem;
  color: var(--admin-text-muted);
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  white-space: nowrap;
  font-family: inherit;
}

.admin-tab.active {
  color: var(--admin-sidebar);
  border-bottom-color: var(--admin-gold);
}

.admin-tab:hover { color: var(--admin-sidebar); }
.admin-tab-pane { display: none; }
.admin-tab-pane.active { display: block; }

/* LOGIN PAGE */
.login-body {
  background: var(--admin-sidebar);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem 1rem;
  font-family: 'Be Vietnam Pro', sans-serif;
}

.login-card {
  background: var(--admin-card);
  border-radius: 12px;
  padding: 2.5rem;
  width: 100%;
  max-width: 400px;
  box-shadow: 0 12px 40px rgba(0,0,0,0.3);
  border-top: 4px solid var(--admin-gold);
}

.login-logo {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.75rem;
}

.login-logo .logo-icon {
  width: 56px;
  height: 56px;
  background: var(--admin-gold);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--admin-sidebar);
  font-family: 'Playfair Display', serif;
  font-weight: bold;
  font-size: 1.6rem;
}

.login-logo h1 {
  font-family: 'Playfair Display', serif;
  font-size: 1.3rem;
  color: var(--admin-sidebar);
  text-align: center;
  letter-spacing: 0.05em;
}

.login-logo small {
  font-size: 0.75rem;
  color: var(--admin-text-muted);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.login-form .form-group { margin-bottom: 1rem; }

.login-btn {
  width: 100%;
  background: var(--admin-gold);
  color: var(--admin-sidebar);
  border: none;
  padding: 0.85rem;
  border-radius: 4px;
  font-weight: 700;
  font-size: 0.9rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  cursor: pointer;
  margin-top: 0.5rem;
  font-family: inherit;
}

.login-btn:hover { background: var(--admin-gold-dark); color: #fff; }

.login-error {
  background: rgba(192, 57, 43, 0.1);
  color: var(--admin-danger);
  padding: 0.75rem 1rem;
  border-radius: 4px;
  border-left: 3px solid var(--admin-danger);
  font-size: 0.85rem;
  margin-bottom: 1rem;
}

.login-back {
  text-align: center;
  margin-top: 1.5rem;
  font-size: 0.82rem;
  color: var(--admin-text-muted);
}

.login-back a {
  color: var(--admin-gold-dark);
  text-decoration: none;
  font-weight: 600;
}

/* UPLOAD ZONE */
.upload-zone {
  border: 2px dashed var(--admin-border);
  border-radius: 8px;
  padding: 2rem;
  text-align: center;
  background: #faf6ec;
  color: var(--admin-text-muted);
  cursor: pointer;
  transition: all 0.2s;
}

.upload-zone:hover {
  border-color: var(--admin-gold);
  background: #f5efe0;
}

.upload-zone i {
  font-size: 2.5rem;
  color: var(--admin-gold-dark);
  margin-bottom: 0.75rem;
  display: block;
}

.upload-zone input[type="file"] { display: none; }

.media-gallery {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 1rem;
}

.media-tile {
  background: var(--admin-card);
  border: 1px solid var(--admin-border);
  border-radius: 6px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.media-tile-thumb {
  aspect-ratio: 4/3;
  background: #f5efe0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--admin-gold-dark);
  font-size: 2rem;
  overflow: hidden;
}

.media-tile-thumb img, .media-tile-thumb video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media-tile-body {
  padding: 0.75rem;
  font-size: 0.8rem;
}

.media-tile-title {
  font-weight: 600;
  margin-bottom: 0.25rem;
  color: var(--admin-sidebar);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.media-tile-actions {
  display: flex;
  gap: 0.25rem;
  margin-top: 0.5rem;
  flex-wrap: wrap;
}

.image-preview {
  max-width: 220px;
  border-radius: 6px;
  border: 1px solid var(--admin-border);
  margin-top: 0.5rem;
}

/* FLASH */
.admin-flash {
  background: rgba(45, 122, 79, 0.12);
  color: var(--admin-success);
  padding: 0.75rem 1rem;
  border-radius: 4px;
  border-left: 3px solid var(--admin-success);
  margin-bottom: 1.25rem;
  font-size: 0.88rem;
}

.timeline-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.timeline-row {
  display: grid;
  grid-template-columns: 80px 1fr auto;
  gap: 0.75rem;
  align-items: center;
  padding: 0.6rem 0.85rem;
  background: #faf6ec;
  border: 1px solid var(--admin-border);
  border-radius: 6px;
}

.timeline-row .year {
  font-weight: 700;
  color: var(--admin-sidebar);
  font-family: 'Playfair Display', serif;
}

.inline-form {
  display: grid;
  grid-template-columns: 100px 1fr 2fr auto;
  gap: 0.5rem;
  align-items: end;
  margin-top: 0.75rem;
}

.inline-form input, .inline-form textarea {
  padding: 0.5rem;
  border: 1px solid var(--admin-border);
  border-radius: 4px;
  font-size: 0.85rem;
  font-family: inherit;
}

@media (max-width: 900px) {
  .admin-layout { grid-template-columns: 1fr; }
  .admin-sidebar {
    position: fixed; top: 0; left: -240px; width: 240px;
    height: 100vh; z-index: 200; transition: left 0.3s;
  }
  .admin-sidebar.open { left: 0; }
  .form-row-2, .form-row-3, .form-row-4 { grid-template-columns: 1fr; }
  .admin-content { padding: 1.25rem; }
}