/* ── CSS Variables ─────────────────────────────────────────────────────────── */
:root {
  --primary:        #6366f1;
  --primary-dark:   #4f46e5;
  --primary-light:  #818cf8;
  --bg:             #0f172a;
  --bg-card:        #1e293b;
  --bg-input:       #0f172a;
  --border:         #334155;
  --text:           #e2e8f0;
  --text-muted:     #94a3b8;
  --success:        #10b981;
  --error:          #ef4444;
  --warning:        #f59e0b;
  --info:           #3b82f6;
  --radius:         0.5rem;
  --shadow:         0 4px 6px -1px rgba(0,0,0,.4);
}

/* ── Reset / Base ──────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.6;
}

a { color: var(--primary-light); text-decoration: none; }
a:hover { text-decoration: underline; }

button, input, select, textarea {
  font-family: inherit;
  font-size: 0.875rem;
}

/* ── Navigation ────────────────────────────────────────────────────────────── */
.navbar {
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  padding: 0 1.5rem;
}

.navbar-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  height: 3.5rem;
  gap: 2rem;
}

.navbar-brand {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--primary-light);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
}

.navbar-brand svg { width: 1.4rem; height: 1.4rem; }

.navbar-links {
  display: flex;
  gap: 0.25rem;
  flex: 1;
}

.nav-link {
  padding: 0.375rem 0.875rem;
  border-radius: var(--radius);
  color: var(--text-muted);
  font-size: 0.875rem;
  font-weight: 500;
  transition: background 0.15s, color 0.15s;
  text-decoration: none;
}

.nav-link:hover { background: rgba(99,102,241,.15); color: var(--text); text-decoration: none; }
.nav-link.active { background: rgba(99,102,241,.2); color: var(--primary-light); }

/* ── Layout ────────────────────────────────────────────────────────────────── */
.page {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
}

.page-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
}

.page-subtitle {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 1.5rem;
}

/* ── Cards ─────────────────────────────────────────────────────────────────── */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  box-shadow: var(--shadow);
}

.card-title {
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-bottom: 1rem;
}

/* ── Buttons ───────────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 1rem;
  border-radius: var(--radius);
  border: none;
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: opacity 0.15s, transform 0.1s;
  white-space: nowrap;
}

.btn:active { transform: scale(0.97); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

.btn-primary   { background: var(--primary); color: #fff; }
.btn-primary:hover:not(:disabled)   { background: var(--primary-dark); }

.btn-success   { background: var(--success); color: #fff; }
.btn-success:hover:not(:disabled)   { opacity: 0.85; }

.btn-danger    { background: var(--error); color: #fff; }
.btn-danger:hover:not(:disabled)    { opacity: 0.85; }

.btn-ghost {
  background: transparent;
  color: var(--text-muted);
  border: 1px solid var(--border);
}
.btn-ghost:hover:not(:disabled) { background: rgba(255,255,255,.05); color: var(--text); }

.btn-sm { padding: 0.3rem 0.6rem; font-size: 0.8rem; }

/* ── Form controls ─────────────────────────────────────────────────────────── */
.input, .select, .textarea {
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  padding: 0.5rem 0.75rem;
  width: 100%;
  outline: none;
  transition: border-color 0.15s;
}

.input:focus, .select:focus, .textarea:focus {
  border-color: var(--primary);
}

.select { cursor: pointer; }

/* ── Badge ──────────────────────────────────────────────────────────────────── */
.badge {
  display: inline-block;
  padding: 0.15rem 0.5rem;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 500;
}
.badge-green   { background: rgba(16,185,129,.2); color: var(--success); }
.badge-yellow  { background: rgba(245,158,11,.2);  color: var(--warning); }
.badge-red     { background: rgba(239,68,68,.2);   color: var(--error);   }
.badge-blue    { background: rgba(59,130,246,.2);  color: var(--info);    }
.badge-purple  { background: rgba(99,102,241,.2);  color: var(--primary-light); }

/* ── Alert banners ─────────────────────────────────────────────────────────── */
.alert {
  padding: 0.75rem 1rem;
  border-radius: var(--radius);
  font-size: 0.875rem;
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
}
.alert-error   { background: rgba(239,68,68,.12);   border: 1px solid rgba(239,68,68,.3);   color: #fca5a5; }
.alert-success { background: rgba(16,185,129,.12);  border: 1px solid rgba(16,185,129,.3);  color: #6ee7b7; }
.alert-info    { background: rgba(59,130,246,.12);  border: 1px solid rgba(59,130,246,.3);  color: #93c5fd; }
.alert-warning { background: rgba(245,158,11,.12);  border: 1px solid rgba(245,158,11,.3);  color: #fcd34d; }

/* ── Tables ─────────────────────────────────────────────────────────────────── */
.table-wrap {
  overflow-x: auto;
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
}

.data-table th {
  background: rgba(99,102,241,.1);
  color: var(--text-muted);
  font-weight: 600;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.6rem 0.9rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
  user-select: none;
}

.data-table th.sortable { cursor: pointer; }
.data-table th.sortable:hover { color: var(--text); }

.data-table td {
  padding: 0.55rem 0.9rem;
  border-bottom: 1px solid rgba(51,65,85,.5);
  max-width: 260px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.data-table tr:last-child td { border-bottom: none; }
.data-table tr:hover td { background: rgba(255,255,255,.03); }

.null-value { color: var(--text-muted); font-style: italic; }

/* ── Pagination ─────────────────────────────────────────────────────────────── */
.pagination {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.pagination-info { color: var(--text-muted); font-size: 0.85rem; flex: 1; }

/* ── Loading spinner ─────────────────────────────────────────────────────────── */
.spinner {
  display: inline-block;
  width: 1.1rem;
  height: 1.1rem;
  border: 2px solid rgba(255,255,255,.2);
  border-top-color: var(--primary-light);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  vertical-align: middle;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* ── CodeMirror overrides ────────────────────────────────────────────────────── */
.CodeMirror {
  height: auto !important;
  min-height: 140px;
  font-family: 'JetBrains Mono', 'Fira Code', ui-monospace, monospace;
  font-size: 0.9rem;
  border-radius: 0 0 var(--radius) var(--radius);
}

.CodeMirror-scroll { min-height: 140px; }

/* ── Modal ───────────────────────────────────────────────────────────────────── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.7);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}

.modal {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  width: 100%;
  max-width: 500px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: 0 25px 50px -12px rgba(0,0,0,.7);
}

.modal-title {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 1.25rem;
}

.form-group { margin-bottom: 1rem; }
.form-group label {
  display: block;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-muted);
  margin-bottom: 0.3rem;
}

.form-actions {
  display: flex;
  gap: 0.5rem;
  justify-content: flex-end;
  margin-top: 1.5rem;
}

/* ── Toolbar ─────────────────────────────────────────────────────────────────── */
.toolbar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-bottom: 1rem;
}

/* ── Stat chips ──────────────────────────────────────────────────────────────── */
.stat-row {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 0.75rem;
}

.stat-chip { display: flex; align-items: center; gap: 0.3rem; }
.stat-chip span { color: var(--text); font-weight: 500; }

/* ── Query history ───────────────────────────────────────────────────────────── */
.history-item {
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 0.8rem;
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  color: var(--text-muted);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  transition: background 0.15s;
  border: 1px solid transparent;
}

.history-item:hover {
  background: rgba(99,102,241,.1);
  color: var(--text);
  border-color: var(--border);
}

/* ── Example queries ─────────────────────────────────────────────────────────── */
.example-item {
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 0.8rem;
  color: var(--text-muted);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  transition: background 0.15s;
}

.example-item:hover { background: rgba(99,102,241,.1); color: var(--text); }
.example-item strong { display: block; color: var(--text); }

/* ── Grid helpers ────────────────────────────────────────────────────────────── */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
@media (max-width: 640px) { .grid-2 { grid-template-columns: 1fr; } }

.split-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 1.5rem;
  align-items: start;
}
@media (max-width: 800px) { .split-layout { grid-template-columns: 1fr; } }

/* ── Hero ────────────────────────────────────────────────────────────────────── */
.hero {
  text-align: center;
  padding: 4rem 1.5rem;
}

.hero-title {
  font-size: 2.5rem;
  font-weight: 800;
  background: linear-gradient(135deg, #6366f1, #818cf8, #c084fc);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 1rem;
}

.hero-subtitle {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 520px;
  margin: 0 auto 2.5rem;
}

.feature-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.25rem;
  max-width: 900px;
  margin: 0 auto;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  text-align: left;
  text-decoration: none;
  color: var(--text);
  transition: border-color 0.2s, transform 0.2s;
}

.feature-card:hover {
  border-color: var(--primary);
  transform: translateY(-2px);
  text-decoration: none;
}

.feature-icon {
  font-size: 1.75rem;
  margin-bottom: 0.75rem;
  display: block;
}

.feature-card h3 { font-size: 1rem; font-weight: 600; margin-bottom: 0.35rem; }
.feature-card p  { font-size: 0.85rem; color: var(--text-muted); }

/* ── Misc ─────────────────────────────────────────────────────────────────────── */
.empty-state {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.empty-state svg { opacity: 0.3; margin-bottom: 0.75rem; }

.truncation-notice {
  font-size: 0.8rem;
  color: var(--warning);
  margin-top: 0.5rem;
}

.hidden { display: none !important; }