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

:root, [data-theme="light"] {
  --bg-page: #f5f7fa;
  --bg-surface: #ffffff;
  --bg-tertiary: #f1f5f9;
  --bg-input: #ffffff;
  --border: #e2e8f0;
  --border-input: #cbd5e1;
  --text-heading: #0f172a;
  --text-primary: #1e293b;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --accent: #6366f1;
  --accent-hover: #4f46e5;
  --accent-bg: rgba(99,102,241,0.08);
  --success: #10b981;
  --danger: #dc2626;
  --danger-bg: #fef2f2;
  --warning: #f59e0b;
}

[data-theme="dark"] {
  --bg-page: #0b1120;
  --bg-surface: #131c31;
  --bg-tertiary: #1a2744;
  --bg-input: #1a2744;
  --border: #1e3a5f;
  --border-input: #2d4a6f;
  --text-heading: #f1f5f9;
  --text-primary: #e2e8f0;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --accent: #6366f1;
  --accent-hover: #4f46e5;
  --accent-bg: rgba(99,102,241,0.12);
  --success: #10b981;
  --danger: #ef4444;
  --danger-bg: rgba(239,68,68,0.12);
  --warning: #fbbf24;
}

body {
  font-family: 'Inter', sans-serif;
  background: var(--bg-page);
  color: var(--text-primary);
  min-height: 100vh;
  font-size: 14px;
  transition: background 0.25s, color 0.25s;
}

/* TOPNAV */
.topnav {
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border);
  padding: 12px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: sticky;
  top: 0;
  z-index: 100;
}
.topnav-left { display: flex; align-items: center; gap: 10px; }
.logo-img { width: 28px; height: 28px; border-radius: 6px; object-fit: cover; }
.logo { font-weight: 800; font-size: 16px; background: linear-gradient(135deg,#6366f1,#8b5cf6); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; letter-spacing: 0.2px; }
.topnav-right { display: flex; align-items: center; gap: 12px; }
.user-greeting { font-size: 13px; color: var(--text-secondary); display: flex; align-items: center; gap: 6px; }
.user-greeting .role-badge { background: var(--accent-bg); color: var(--accent); padding: 2px 8px; border-radius: 10px; font-size: 11px; font-weight: 600; }
.theme-toggle, .btn-logout { padding: 7px 14px; border-radius: 7px; border: 1px solid var(--border); background: transparent; color: var(--text-secondary); font-size: 12px; font-weight: 500; cursor: pointer; font-family: inherit; transition: all 0.2s; }
.theme-toggle:hover, .btn-logout:hover { border-color: var(--accent); color: var(--accent); }

/* TABS */
.tab-bar {
  display: flex;
  gap: 4px;
  padding: 0 24px;
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border);
  overflow-x: auto;
}
.tab-btn {
  padding: 12px 18px;
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-family: inherit;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: all 0.15s;
  white-space: nowrap;
  display: flex;
  align-items: center;
  gap: 6px;
}
.tab-btn:hover { color: var(--text-primary); }
.tab-btn.active { color: var(--accent); border-bottom-color: var(--accent); }

/* MAIN */
.main-content { padding: 24px; max-width: 1400px; margin: 0 auto; }
.section-title { font-size: 18px; font-weight: 700; color: var(--text-heading); margin-bottom: 16px; }

/* CARD */
.card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  margin-bottom: 20px;
}

/* GRID layout (form + preview side-by-side) */
.split-layout {
  display: grid;
  grid-template-columns: 1fr 420px;
  gap: 24px;
  align-items: start;
}
@media (max-width: 980px) {
  .split-layout { grid-template-columns: 1fr; }
}

/* FORM */
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: 12px; font-weight: 600; color: var(--text-secondary); margin-bottom: 6px; text-transform: uppercase; letter-spacing: 0.3px; }
.form-group input, .form-group select, .form-group textarea {
  width: 100%;
  padding: 10px 12px;
  background: var(--bg-input);
  border: 1px solid var(--border-input);
  border-radius: 8px;
  color: var(--text-primary);
  font-family: inherit;
  font-size: 14px;
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-bg);
}
.form-group .help-text { font-size: 11px; color: var(--text-muted); margin-top: 4px; }
.img-preview { display: none; max-width: 100%; max-height: 180px; margin-top: 10px; border-radius: 8px; border: 1px solid var(--border); }

/* BUTTONS */
.btn { padding: 10px 16px; border-radius: 8px; border: none; font-family: inherit; font-size: 13px; font-weight: 600; cursor: pointer; display: inline-flex; align-items: center; justify-content: center; gap: 6px; transition: all 0.15s; }
.btn:disabled { opacity: 0.6; cursor: not-allowed; }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover:not(:disabled) { background: var(--accent-hover); }
.btn-secondary { background: var(--bg-tertiary); color: var(--text-primary); border: 1px solid var(--border); }
.btn-secondary:hover:not(:disabled) { border-color: var(--accent); color: var(--accent); }
.btn-danger { background: var(--danger-bg); color: var(--danger); border: 1px solid var(--danger); }
.btn-danger:hover:not(:disabled) { background: var(--danger); color: #fff; }
.btn-sm { padding: 5px 10px; font-size: 12px; }
.btn-block { width: 100%; }

/* TABLE */
.table { width: 100%; border-collapse: collapse; font-size: 13px; }
.table th, .table td { padding: 10px 12px; text-align: left; border-bottom: 1px solid var(--border); }
.table th { font-size: 11px; font-weight: 600; text-transform: uppercase; color: var(--text-muted); letter-spacing: 0.3px; }
.table tr:last-child td { border-bottom: none; }
.table tr:hover td { background: var(--bg-tertiary); }
.table .url-cell { font-family: monospace; font-size: 12px; color: var(--accent); word-break: break-all; max-width: 380px; }
.table .badge { display: inline-block; padding: 2px 8px; border-radius: 10px; font-size: 11px; font-weight: 600; }
.badge-success { background: rgba(16,185,129,0.12); color: var(--success); }
.badge-warning { background: rgba(245,158,11,0.12); color: var(--warning); }
.badge-info { background: rgba(99,102,241,0.12); color: var(--accent); }
.badge-muted { background: var(--bg-tertiary); color: var(--text-muted); }

/* EMPTY STATE */
.empty-state { text-align: center; padding: 40px 20px; color: var(--text-muted); }
.empty-state h3 { color: var(--text-secondary); margin-bottom: 8px; font-size: 15px; }
.empty-state p { font-size: 13px; }

/* PREVIEW PANEL (Facebook style) */
.preview-panel { position: sticky; top: 80px; }
.preview-panel h3 { font-size: 13px; font-weight: 700; color: var(--text-secondary); margin-bottom: 10px; text-transform: uppercase; letter-spacing: 0.5px; }
.fb-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  margin-bottom: 14px;
}
.fb-card .fb-image {
  width: 100%;
  aspect-ratio: 1.91 / 1;
  background: var(--bg-tertiary);
  background-size: cover;
  background-position: center;
  display: flex;
  justify-content: center;
  align-items: center;
  color: var(--text-muted);
  font-size: 12px;
}
.fb-card .fb-meta {
  padding: 10px 12px;
  border-top: 1px solid var(--border);
  background: #f0f2f5;
}
[data-theme="dark"] .fb-card .fb-meta { background: #1a2744; }
.fb-card .fb-domain { font-size: 11px; color: #65676b; text-transform: uppercase; letter-spacing: 0.2px; margin-bottom: 4px; }
[data-theme="dark"] .fb-card .fb-domain { color: #94a3b8; }
.fb-card .fb-title { font-size: 16px; font-weight: 600; color: #050505; line-height: 1.3; word-break: break-word; }
[data-theme="dark"] .fb-card .fb-title { color: #e4e6eb; }
.fb-card .fb-desc { font-size: 13px; color: #65676b; margin-top: 4px; line-height: 1.3; word-break: break-word; }
[data-theme="dark"] .fb-card .fb-desc { color: #b0b3b8; }

/* TOAST */
.toast-container { position: fixed; top: 20px; right: 20px; z-index: 1000; display: flex; flex-direction: column; gap: 8px; }
.toast { background: var(--bg-surface); border: 1px solid var(--border); border-left: 4px solid var(--accent); padding: 12px 18px; border-radius: 8px; font-size: 13px; box-shadow: 0 4px 12px rgba(0,0,0,0.1); animation: slideIn 0.2s ease; min-width: 220px; }
.toast.success { border-left-color: var(--success); }
.toast.error { border-left-color: var(--danger); color: var(--danger); }
@keyframes slideIn { from { transform: translateX(100%); opacity: 0; } to { transform: translateX(0); opacity: 1; } }

/* MODAL */
.modal-overlay { position: fixed; top: 0; left: 0; right: 0; bottom: 0; background: rgba(0,0,0,0.5); display: flex; justify-content: center; align-items: center; z-index: 999; }
.modal-box { background: var(--bg-surface); border: 1px solid var(--border); border-radius: 12px; padding: 24px; max-width: 90%; width: 460px; }
.modal-box h3 { margin-bottom: 14px; font-size: 16px; color: var(--text-heading); }
.modal-actions { display: flex; gap: 10px; justify-content: flex-end; margin-top: 18px; }

/* LINK RESULT BLOCK */
.result-block { background: var(--bg-tertiary); border: 1px solid var(--border); border-radius: 8px; padding: 14px; margin-top: 16px; }
.result-block .result-url { font-family: monospace; font-size: 12px; color: var(--accent); word-break: break-all; padding: 8px; background: var(--bg-input); border-radius: 6px; margin-bottom: 10px; }
.result-block .result-actions { display: flex; gap: 8px; flex-wrap: wrap; }