/* ================================================================
   Design System — shared across landing and app shell
   Dark theme, neutral palette, indigo accent
   ================================================================ */

:root {
  --bg:         #0c0c0e;
  --surface:    #141417;
  --surface-2:  #1c1c21;
  --border:     #2a2a32;
  --text:       #e2e2e9;
  --text-muted: #8e8e9e;
  --text-dim:   #5a5a6e;
  --accent:     #6366f1;
  --accent-hover: #5254cc;
  --danger:     #ef4444;
  --radius:     8px;
  --radius-sm:  4px;
  --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }

html, body {
  margin: 0; padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

/* ── Login page ───────────────────────────────────────────────── */

.login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.login-card {
  width: 100%;
  max-width: 400px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 40px;
}

.login-card .logo {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.3px;
  margin-bottom: 32px;
  display: block;
}

.login-card h1 {
  font-size: 1.4rem;
  font-weight: 600;
  margin: 0 0 8px;
  color: var(--text);
  letter-spacing: -0.3px;
}

.login-card .subtitle {
  color: var(--text-muted);
  margin: 0 0 28px;
  font-size: 0.9rem;
}

.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-muted);
  margin-bottom: 6px;
}

.form-group input[type="email"] {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 0.95rem;
  padding: 10px 14px;
  outline: none;
  transition: border-color 0.15s;
}

.form-group input[type="email"]:focus {
  border-color: var(--accent);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  font-weight: 500;
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  transition: background 0.15s, opacity 0.15s;
  text-decoration: none;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  width: 100%;
  padding: 11px;
}

.btn-primary:hover { background: var(--accent-hover); }

.btn-ghost {
  background: transparent;
  color: var(--text-muted);
  border: 1px solid var(--border);
}

.btn-ghost:hover {
  background: var(--surface-2);
  color: var(--text);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.alert {
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  font-size: 0.85rem;
  margin-bottom: 16px;
}

.alert-error {
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.25);
  color: #fca5a5;
}

.alert-success {
  background: rgba(99, 102, 241, 0.1);
  border: 1px solid rgba(99, 102, 241, 0.25);
  color: #a5b4fc;
}

/* ── App shell ────────────────────────────────────────────────── */

.app-shell {
  display: flex;
  height: 100vh;
  overflow: hidden;
}

/* Top nav */
.top-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 52px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding: 0 20px;
  z-index: 100;
  gap: 16px;
}

.top-nav .brand {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.3px;
  text-decoration: none;
  flex: 1;
}

.top-nav .user-email {
  font-size: 0.82rem;
  color: var(--text-muted);
  max-width: 240px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.top-nav form { margin: 0; }

.btn-sm {
  padding: 6px 12px;
  font-size: 0.8rem;
}

/* Sidebar */
.sidebar {
  width: 220px;
  flex-shrink: 0;
  background: var(--surface);
  border-right: 1px solid var(--border);
  padding-top: 68px; /* below fixed nav */
  overflow-y: auto;
  position: fixed;
  top: 0;
  bottom: 0;
  left: 0;
}

.sidebar-nav {
  padding: 12px 8px;
  list-style: none;
  margin: 0;
}

.sidebar-nav li { margin-bottom: 2px; }

.sidebar-nav a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-muted);
  text-decoration: none;
  transition: background 0.12s, color 0.12s;
}

.sidebar-nav a:hover,
.sidebar-nav a.active {
  background: var(--surface-2);
  color: var(--text);
}

.sidebar-nav a.active {
  color: var(--accent);
}

.sidebar-icon {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  opacity: 0.7;
}

/* Main content */
.main-content {
  margin-left: 220px;
  padding-top: 52px;
  flex: 1;
  overflow-y: auto;
  min-height: 100vh;
}

.page-body {
  padding: 32px;
  max-width: 900px;
}

.page-header {
  margin-bottom: 28px;
}

.page-header h1 {
  font-size: 1.35rem;
  font-weight: 600;
  margin: 0 0 4px;
  letter-spacing: -0.3px;
}

.page-header p {
  color: var(--text-muted);
  margin: 0;
  font-size: 0.9rem;
}

/* Empty state */
.empty-state {
  background: var(--surface);
  border: 1px dashed var(--border);
  border-radius: 12px;
  padding: 64px 48px;
  text-align: center;
}

.empty-state-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto 20px;
  opacity: 0.3;
}

.empty-state h2 {
  font-size: 1.1rem;
  font-weight: 600;
  margin: 0 0 8px;
  color: var(--text);
}

.empty-state p {
  color: var(--text-muted);
  margin: 0 0 24px;
  font-size: 0.9rem;
  max-width: 320px;
  margin-inline: auto;
}

/* Settings card */
.settings-section {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  margin-bottom: 20px;
  overflow: hidden;
}

.settings-section-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
}

.settings-section-header h2 {
  font-size: 0.95rem;
  font-weight: 600;
  margin: 0;
}

.settings-row {
  padding: 16px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.settings-label {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.settings-value {
  font-size: 0.88rem;
  font-family: monospace;
  color: var(--text);
}

/* Responsive: collapse sidebar on small screens */
@media (max-width: 680px) {
  .sidebar { display: none; }
  .main-content { margin-left: 0; }
}

/* ── Waitlist dashboard ───────────────────────────────────────── */

/* Stat cards */
.stat-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr 1fr;
  gap: 12px;
  margin-bottom: 20px;
}

@media (max-width: 860px) {
  .stat-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 520px) {
  .stat-grid { grid-template-columns: 1fr; }
}

.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 18px 20px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.stat-card--hero {
  border-color: rgba(99,102,241,0.35);
  background: rgba(99,102,241,0.06);
}

.stat-label {
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.stat-value {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -1px;
  line-height: 1;
}

.stat-card--hero .stat-value { color: #a5b4fc; }

/* Chart panel */
.chart-panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  margin-bottom: 20px;
  overflow: hidden;
}

.chart-panel-header {
  padding: 14px 20px;
  border-bottom: 1px solid var(--border);
}

.chart-title {
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.chart-wrap {
  padding: 20px 20px 16px;
}

/* Table panel */
.table-panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
}

.table-panel-header {
  padding: 14px 20px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.table-title {
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.table-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.table-actions .btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.table-empty {
  padding: 48px 32px;
  text-align: center;
  color: var(--text-muted);
  display: flex;
  flex-direction: column;
  align-items: center;
}

.table-empty p { font-size: 0.88rem; margin: 0; }

.signup-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}

.signup-table thead th {
  padding: 10px 20px;
  text-align: left;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  border-bottom: 1px solid var(--border);
}

.signup-table tbody tr {
  border-bottom: 1px solid rgba(42,42,50,0.5);
  transition: background 0.1s;
}

.signup-table tbody tr:last-child { border-bottom: none; }
.signup-table tbody tr:hover { background: var(--surface-2); }

.signup-table td {
  padding: 11px 20px;
  color: var(--text);
}

.email-cell {
  font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
  font-size: 0.84rem;
  word-break: break-all;
}

.col-time, .time-cell {
  text-align: right;
  white-space: nowrap;
  color: var(--text-muted);
  font-size: 0.82rem;
  width: 100px;
}

.table-footer {
  padding: 12px 20px;
  font-size: 0.8rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border);
  text-align: center;
}

.table-footer a {
  color: var(--accent);
  text-decoration: none;
}

.table-footer a:hover { text-decoration: underline; }