/* === Mosaic Cloud Admin Styles === */

:root {
  --color-bg: #f5f5f7;
  --color-surface: #ffffff;
  --color-surface-hover: #f8f8fa;
  --color-text-primary: #1d1d1f;
  --color-text-secondary: #86868b;
  --color-text-tertiary: #aeaeb2;
  --color-accent: #4361ee;
  --color-accent-hover: #3651d4;
  --color-border: #d2d2d7;
  --color-border-light: #e5e5ea;
  --color-danger: #e74c3c;
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-mono: 'SF Mono', 'Fira Code', 'Cascadia Code', 'Consolas', monospace;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.8125rem;
  --font-size-base: 0.9375rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.5rem;
  --font-size-2xl: 2rem;
  --sidebar-width: 220px;
  --header-height: 56px;
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-12: 3rem;
  --card-radius: 8px;
  --button-radius: 6px;
  --transition-fast: 150ms ease;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #1c1c1e;
    --color-surface: #2c2c2e;
    --color-surface-hover: #3a3a3c;
    --color-text-primary: #f5f5f7;
    --color-text-secondary: #98989d;
    --color-text-tertiary: #6e6e73;
    --color-border: #48484a;
    --color-border-light: #38383a;
  }
}

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

body {
  font-family: var(--font-sans);
  font-size: var(--font-size-base);
  color: var(--color-text-primary);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

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

#app { flex: 1; width: 100%; }

/* ── Login ── */
.login-overlay {
  position: fixed; inset: 0; z-index: 9999;
  display: flex; align-items: center; justify-content: center;
  background: var(--color-bg);
}
.login-box {
  text-align: center; width: 380px; padding: var(--space-8);
  background: var(--color-surface); border-radius: 16px;
  box-shadow: 0 2px 24px rgba(0,0,0,0.06);
  border: 1px solid var(--color-border-light);
}
.login-box h1 { font-size: var(--font-size-2xl); margin-bottom: var(--space-1); font-weight: 700; }
.login-box p { color: var(--color-text-secondary); margin-bottom: var(--space-6); font-size: var(--font-size-sm); }
.login-box input {
  width: 100%; padding: 10px 14px;
  border: 2px solid var(--color-border-light); border-radius: 8px;
  font-size: var(--font-size-base); background: var(--color-bg); color: var(--color-text-primary);
  outline: none; margin-bottom: var(--space-4); transition: border-color var(--transition-fast);
}
.login-box input:focus { border-color: var(--color-accent); }
.login-box .btn-primary { width: 100%; padding: 10px; border-radius: 8px; font-size: var(--font-size-base); justify-content: center; }

/* ── Sidebar ── */
.sidebar {
  width: var(--sidebar-width); min-height: 100vh;
  background: var(--color-surface); border-right: 1px solid var(--color-border-light);
  padding: var(--space-4); flex-shrink: 0; position: sticky; top: 0;
  display: flex; flex-direction: column;
}
.sidebar-logo {
  font-size: var(--font-size-lg); font-weight: 700;
  padding: var(--space-2) var(--space-3); margin-bottom: var(--space-6);
  display: flex; align-items: center; gap: var(--space-2);
}
.sidebar-nav { display: flex; flex-direction: column; gap: 1px; flex: 1; }
.nav-item {
  display: flex; align-items: center; gap: 10px;
  padding: 8px 12px; border-radius: 8px;
  font-size: var(--font-size-sm); color: var(--color-text-secondary); text-decoration: none;
  transition: all var(--transition-fast); font-weight: 500;
}
.nav-item:hover { background: var(--color-surface-hover); color: var(--color-text-primary); }
.nav-item.active { background: rgba(67, 97, 238, 0.1); color: var(--color-accent); font-weight: 600; }
.nav-item.active i { color: var(--color-accent); }
.nav-item i { font-size: 1.15rem; width: 22px; text-align: center; }
.sidebar-divider { height: 1px; background: var(--color-border-light); margin: var(--space-3) 0; }

/* ── Main Content ── */
.main-content { flex: 1; padding: var(--space-8) var(--space-8); min-width: 0; overflow-x: auto; }
.main-content h1 { font-size: var(--font-size-xl); margin-bottom: var(--space-6); }
.main-content h2 { font-size: var(--font-size-lg); margin: var(--space-6) 0 var(--space-3); }
.main-content h3 { font-size: var(--font-size-base); margin: var(--space-4) 0 var(--space-2); }

/* ── Buttons ── */
.btn-primary {
  display: inline-flex; align-items: center; gap: var(--space-2);
  padding: var(--space-2) var(--space-4); background: var(--color-accent); color: #fff;
  border: none; border-radius: var(--button-radius); font-size: var(--font-size-sm);
  font-weight: 600; cursor: pointer; transition: background var(--transition-fast);
  text-decoration: none;
}
.btn-primary:hover { background: var(--color-accent-hover); }
.btn-secondary {
  display: inline-flex; align-items: center; gap: var(--space-2);
  padding: var(--space-2) var(--space-4); background: var(--color-surface);
  border: 1px solid var(--color-border); border-radius: var(--button-radius);
  font-size: var(--font-size-sm); color: var(--color-text-secondary); cursor: pointer;
  transition: all var(--transition-fast); text-decoration: none;
}
.btn-secondary:hover { border-color: var(--color-text-secondary); color: var(--color-text-primary); }
.btn-sm {
  padding: 4px 10px; border-radius: 4px; font-size: var(--font-size-xs);
  border: 1px solid var(--color-border-light); background: var(--color-surface);
  color: var(--color-text-secondary); cursor: pointer; transition: all var(--transition-fast);
}
.btn-sm:hover { border-color: var(--color-border); color: var(--color-text-primary); }

/* ── Stats Cards ── */
.stats-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: var(--space-4); }
.stat-card {
  background: var(--color-surface); border: 1px solid var(--color-border-light);
  border-radius: 10px; padding: 20px; display: flex; align-items: flex-start; gap: 14px;
  transition: box-shadow var(--transition-fast);
}
.stat-card:hover { box-shadow: 0 2px 12px rgba(0,0,0,0.04); }
.stat-card-icon {
  width: 40px; height: 40px; border-radius: 10px; display: flex; align-items: center;
  justify-content: center; font-size: 18px; flex-shrink: 0;
}
.stat-card-info { flex: 1; }
.stat-num { display: block; font-size: 22px; font-weight: 700; color: var(--color-text-primary); line-height: 1.1; }
.stat-label { display: block; font-size: var(--font-size-xs); color: var(--color-text-tertiary); margin-top: 2px; }

/* ── Page Header ── */
.page-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: var(--space-6); flex-wrap: wrap; gap: var(--space-3); }
.page-header h1 { margin-bottom: 0; }

/* ── Data Table ── */
.data-table { width: 100%; border-collapse: collapse; font-size: var(--font-size-sm); }
.data-table th, .data-table td { padding: var(--space-2) var(--space-3); text-align: left; border-bottom: 1px solid var(--color-border-light); }
.data-table th { font-weight: 600; color: var(--color-text-secondary); font-size: var(--font-size-xs); text-transform: uppercase; letter-spacing: 0.5px; }
.data-table tr:hover td { background: var(--color-surface-hover); }

/* ── Forms ── */
.editor-layout { display: grid; grid-template-columns: 280px 1fr; gap: var(--space-6); }
.editor-fields label { display: block; margin-bottom: var(--space-4); font-size: var(--font-size-sm); color: var(--color-text-secondary); }
.editor-fields input, .editor-fields select, .editor-fields textarea {
  display: block; width: 100%; margin-top: 4px; padding: var(--space-2) var(--space-3);
  border: 1px solid var(--color-border); border-radius: var(--button-radius);
  font-size: var(--font-size-sm); background: var(--color-surface); color: var(--color-text-primary);
  font-family: inherit;
}
.editor-fields input:focus, .editor-fields select:focus, .editor-fields textarea:focus { outline: none; border-color: var(--color-accent); }
.editor-body textarea { resize: vertical; }

/* ── Upload Zone ── */
.upload-zone {
  border: 2px dashed var(--color-border); border-radius: var(--card-radius);
  padding: var(--space-8); text-align: center; cursor: pointer; transition: all var(--transition-fast);
}
.upload-zone:hover { border-color: var(--color-accent); background: var(--color-surface-hover); }
.upload-zone p { color: var(--color-text-secondary); font-size: var(--font-size-sm); margin-top: var(--space-2); }

/* ── Media Grid ── */
.media-grid { display: flex; flex-wrap: wrap; gap: var(--space-2); }

/* ── View Toggle ── */
.view-toggle { display: flex; border: 1px solid var(--color-border); border-radius: var(--button-radius); overflow: hidden; }
.view-toggle-btn { padding: 6px 12px; border: none; background: var(--color-surface); color: var(--color-text-secondary); cursor: pointer; font-size: 14px; transition: all var(--transition-fast); }
.view-toggle-btn.active { background: var(--color-accent); color: #fff; }
.view-toggle-btn:not(:last-child) { border-right: 1px solid var(--color-border); }

/* ── Admin Post Cards (CSS columns masonry) ── */
.admin-card-grid { column-count: 1; column-gap: var(--space-4); }
.admin-card-grid > * { break-inside: avoid; margin-bottom: var(--space-4); }

@media (min-width: 768px) { .admin-card-grid { column-count: 2; } }
@media (min-width: 1100px) { .admin-card-grid { column-count: 3; } }
@media (min-width: 1600px) { .admin-card-grid { column-count: 4; } }

.admin-post-card {
  display: block; background: var(--color-surface); border: 1px solid var(--color-border-light);
  border-radius: 10px; overflow: hidden; text-decoration: none; color: inherit;
  transition: transform 0.2s, box-shadow 0.2s; cursor: pointer;
}
.admin-post-card:hover { transform: translateY(-2px); box-shadow: 0 4px 16px rgba(0,0,0,0.08); }

.admin-card-cover { width: 100%; background: var(--color-surface-hover); }
.admin-card-cover img { width: 100%; display: block; object-fit: cover; max-height: 240px; }
.admin-card-cover-empty { display: flex; align-items: center; justify-content: center; height: 100px; }

.admin-card-body { padding: 12px 14px 8px; }
.admin-card-cat { font-size: 11px; color: var(--color-accent); font-weight: 600; text-transform: uppercase; letter-spacing: 0.5px; }
.admin-card-title { font-size: 15px; font-weight: 600; margin: 4px 0; line-height: 1.3; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.admin-card-desc { font-size: 12px; color: var(--color-text-secondary); margin-top: 4px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.admin-card-tags { font-size: 11px; color: var(--color-text-tertiary); margin-top: 6px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.admin-card-footer { display: flex; justify-content: space-between; align-items: center; padding: 8px 14px; border-top: 1px solid var(--color-border-light); font-size: 11px; color: var(--color-text-tertiary); }

/* ── Error ── */
.error { color: var(--color-danger); font-size: var(--font-size-sm); }

/* ── Responsive ── */
@media (max-width: 768px) {
  .sidebar { width: 60px; padding: var(--space-2); }
  .sidebar-logo { display: none; }
  .nav-item span { display: none; }
  .nav-item { justify-content: center; padding: var(--space-2); }
  .main-content { padding: var(--space-4); }
  .editor-layout { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
}