:root {
  --bg-primary: #0a0e1a;
  --bg-secondary: #111827;
  --bg-card: #1a2236;
  --bg-input: #0f172a;
  --border: #1e3a5f;
  --text-primary: #e2e8f0;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --accent-light: #60a5fa;
  --accent-glow: rgba(59, 130, 246, 0.15);
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --purple: #8b5cf6;
  --radius: 10px;
  --shadow: 0 4px 24px rgba(0,0,0,0.3);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: 'Inter', 'Segoe UI', sans-serif; background: var(--bg-primary); color: var(--text-primary); min-height: 100vh; }
a { color: var(--accent-light); text-decoration: none; }
a:hover { text-decoration: underline; }

/* Layout */
.app { display: flex; min-height: 100vh; }
.sidebar { width: 240px; background: var(--bg-secondary); border-right: 1px solid var(--border); padding: 20px 0; position: fixed; top: 0; left: 0; bottom: 0; overflow-y: auto; z-index: 100; transition: transform 0.3s; }
.main { margin-left: 240px; flex: 1; padding: 24px; min-height: 100vh; }

/* Sidebar */
.sidebar-header { padding: 0 20px 20px; border-bottom: 1px solid var(--border); margin-bottom: 16px; text-align: center; }
.sidebar-header h1 { font-size: 1.2rem; color: var(--accent-light); letter-spacing: 2px; font-weight: 700; }
.sidebar-header .subtitle { font-size: 0.75rem; color: var(--text-muted); margin-top: 4px; }
.nav-section { padding: 0 12px; margin-bottom: 12px; }
.nav-section-title { font-size: 0.7rem; text-transform: uppercase; letter-spacing: 1.5px; color: var(--text-muted); padding: 8px 12px; font-weight: 600; }
.nav-item { display: flex; align-items: center; gap: 10px; padding: 10px 14px; border-radius: 8px; cursor: pointer; color: var(--text-secondary); font-size: 0.88rem; transition: all 0.2s; margin-bottom: 2px; }
.nav-item:hover { background: var(--accent-glow); color: var(--text-primary); }
.nav-item.active { background: var(--accent); color: #fff; font-weight: 500; }
.nav-item svg { width: 18px; height: 18px; flex-shrink: 0; }
.nav-item .badge { margin-left: auto; background: var(--accent); color: #fff; font-size: 0.7rem; padding: 2px 7px; border-radius: 10px; }

/* Auth page */
.auth-page { display: flex; align-items: center; justify-content: center; min-height: 100vh; background: var(--bg-primary); }
.auth-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: 16px; padding: 40px; width: 100%; max-width: 420px; box-shadow: var(--shadow); }
.auth-card h2 { text-align: center; margin-bottom: 8px; color: var(--accent-light); font-size: 1.5rem; }
.auth-card .brand { text-align: center; font-size: 0.85rem; color: var(--text-muted); margin-bottom: 28px; }
.auth-tabs { display: flex; gap: 0; margin-bottom: 24px; border-radius: 8px; overflow: hidden; border: 1px solid var(--border); }
.auth-tab { flex: 1; padding: 10px; text-align: center; cursor: pointer; font-weight: 500; font-size: 0.9rem; background: var(--bg-input); color: var(--text-secondary); transition: all 0.2s; }
.auth-tab.active { background: var(--accent); color: #fff; }

/* Forms */
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.5px; color: var(--text-muted); margin-bottom: 6px; font-weight: 600; }
input, textarea, select { width: 100%; padding: 11px 14px; border-radius: 8px; border: 1px solid var(--border); background: var(--bg-input); color: var(--text-primary); font-size: 0.9rem; transition: border-color 0.2s; outline: none; font-family: inherit; }
input:focus, textarea:focus, select:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-glow); }
textarea { resize: vertical; min-height: 80px; }
select { cursor: pointer; }

/* Buttons */
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 10px 20px; border-radius: 8px; border: none; font-size: 0.9rem; font-weight: 500; cursor: pointer; transition: all 0.2s; font-family: inherit; }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); transform: translateY(-1px); box-shadow: 0 4px 12px rgba(59,130,246,0.3); }
.btn-success { background: var(--success); color: #fff; }
.btn-success:hover { background: #059669; }
.btn-warning { background: var(--warning); color: #000; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-outline { background: transparent; border: 1px solid var(--border); color: var(--text-secondary); }
.btn-outline:hover { border-color: var(--accent); color: var(--accent-light); }
.btn-sm { padding: 6px 12px; font-size: 0.8rem; }
.btn-block { width: 100%; justify-content: center; }

/* Cards */
.card { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; margin-bottom: 16px; }
.card-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 16px; }
.card-header h3 { font-size: 1.1rem; color: var(--text-primary); }
.card-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 16px; }

/* Page header */
.page-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 24px; }
.page-header h2 { font-size: 1.4rem; }
.page-header .badge { background: var(--accent-glow); color: var(--accent-light); padding: 6px 14px; border-radius: 20px; font-size: 0.8rem; font-weight: 500; }

/* Table */
table { width: 100%; border-collapse: collapse; }
th, td { padding: 10px 14px; text-align: left; border-bottom: 1px solid var(--border); font-size: 0.88rem; }
th { color: var(--text-muted); font-weight: 600; font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.5px; }
tr:hover td { background: var(--accent-glow); }

/* Tags */
.tag { display: inline-block; padding: 3px 10px; border-radius: 12px; font-size: 0.75rem; font-weight: 500; }
.tag-success { background: rgba(16,185,129,0.15); color: var(--success); }
.tag-danger { background: rgba(239,68,68,0.15); color: var(--danger); }
.tag-warning { background: rgba(245,158,11,0.15); color: var(--warning); }

/* Toast */
.toast { position: fixed; top: 20px; right: 20px; background: var(--bg-card); border: 1px solid var(--border); padding: 14px 20px; border-radius: 10px; z-index: 9999; animation: slideIn 0.3s; box-shadow: var(--shadow); max-width: 360px; }
.toast.success { border-left: 4px solid var(--success); }
.toast.error { border-left: 4px solid var(--danger); }
@keyframes slideIn { from { transform: translateX(100%); opacity: 0; } to { transform: translateX(0); opacity: 1; } }

/* Checkbox */
.checkbox-group { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; }
.checkbox-group input[type="checkbox"] { width: 18px; height: 18px; accent-color: var(--accent); }
.checkbox-group label { font-size: 0.88rem; color: var(--text-primary); text-transform: none; letter-spacing: 0; font-weight: 400; margin-bottom: 0; }

/* Tabs */
.tabs { display: flex; gap: 0; border-bottom: 1px solid var(--border); margin-bottom: 20px; }
.tab { padding: 10px 20px; cursor: pointer; font-size: 0.88rem; color: var(--text-muted); border-bottom: 2px solid transparent; transition: all 0.2s; }
.tab:hover { color: var(--text-primary); }
.tab.active { color: var(--accent-light); border-bottom-color: var(--accent); font-weight: 500; }

/* Preview SERP */
.serp-preview { background: #fff; color: #000; padding: 16px; border-radius: 8px; margin: 12px 0; }
.serp-preview .url { color: #006621; font-size: 0.82rem; }
.serp-preview .title { color: #1a0dab; font-size: 1.1rem; margin: 2px 0; cursor: pointer; }
.serp-preview .title:hover { text-decoration: underline; }
.serp-preview .desc { color: #545454; font-size: 0.88rem; line-height: 1.5; }

/* Code editor area */
.code-area { font-family: 'Fira Code', 'Courier New', monospace; font-size: 0.85rem; min-height: 300px; background: #0d1117; border: 1px solid var(--border); border-radius: 8px; padding: 12px; color: #c9d1d9; line-height: 1.6; }

/* Provider cards */
.provider-card { border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; background: var(--bg-secondary); }
.provider-card h4 { color: var(--accent-light); margin-bottom: 8px; font-size: 1rem; }
.provider-card .status { display: flex; align-items: center; gap: 6px; font-size: 0.8rem; margin-top: 12px; }
.provider-card .status .dot { width: 8px; height: 8px; border-radius: 50%; }
.provider-card .status .dot.active { background: var(--success); }
.provider-card .status .dot.inactive { background: var(--text-muted); }

/* Responsive */
@media (max-width: 768px) {
  .sidebar { transform: translateX(-100%); }
  .sidebar.open { transform: translateX(0); }
  .main { margin-left: 0; }
  .card-grid { grid-template-columns: 1fr; }
}

/* Loading */
.spinner { width: 20px; height: 20px; border: 2px solid var(--border); border-top-color: var(--accent); border-radius: 50%; animation: spin 0.6s linear infinite; display: inline-block; }
@keyframes spin { to { transform: rotate(360deg); } }

/* Info box */
.info-box { background: var(--accent-glow); border: 1px solid rgba(59,130,246,0.3); border-radius: 8px; padding: 12px 16px; margin-bottom: 16px; font-size: 0.85rem; color: var(--accent-light); }
.info-box.warning { background: rgba(245,158,11,0.1); border-color: rgba(245,158,11,0.3); color: var(--warning); }

/* Bulk input */
.bulk-input { font-family: 'Fira Code', monospace; font-size: 0.82rem; line-height: 1.6; min-height: 160px; }

/* Two columns */
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 768px) { .two-col { grid-template-columns: 1fr; } }