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

:root {
  --bg: #0f1117;
  --surface: #1a1d27;
  --surface2: #242736;
  --border: #2e3247;
  --text: #e4e6f0;
  --text-muted: #8b8fa3;
  --accent: #6366f1;
  --accent-hover: #818cf8;
  --green: #22c55e;
  --orange: #f59e0b;
  --red: #ef4444;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

.hidden { display: none !important; }

/* Login */
.login-screen {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
}

.login-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 48px;
  text-align: center;
  max-width: 360px;
  width: 100%;
}

.login-card h1 {
  font-size: 24px;
  margin-bottom: 8px;
}

.login-card p {
  color: var(--text-muted);
  margin-bottom: 24px;
}

.login-card input {
  width: 100%;
  padding: 12px 16px;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-size: 16px;
  margin-bottom: 16px;
  outline: none;
}

.login-card input:focus { border-color: var(--accent); }

.login-card button {
  width: 100%;
  padding: 12px;
  background: var(--accent);
  color: white;
  border: none;
  border-radius: 8px;
  font-size: 16px;
  cursor: pointer;
  transition: background 0.2s;
}

.login-card button:hover { background: var(--accent-hover); }

/* Dashboard */
.dashboard {
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px;
}

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
}

header h1 { font-size: 24px; }

.btn-logout {
  padding: 8px 16px;
  background: var(--surface2);
  color: var(--text-muted);
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
  font-size: 14px;
}

.btn-logout:hover { color: var(--text); border-color: var(--text-muted); }

/* Stats Grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
}

.stat-card .label {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.stat-card .value {
  font-size: 28px;
  font-weight: 700;
}

.stat-card .value.accent { color: var(--accent); }
.stat-card .value.green { color: var(--green); }
.stat-card .value.orange { color: var(--orange); }

/* Panels */
.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  margin-bottom: 24px;
}

.panel h2 {
  font-size: 18px;
  margin-bottom: 16px;
}

.total-badge {
  font-size: 13px;
  color: var(--text-muted);
  font-weight: 400;
}

/* Tables */
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

thead th {
  text-align: left;
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  color: var(--text-muted);
  font-weight: 500;
  font-size: 13px;
  white-space: nowrap;
}

tbody td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

tbody tr:hover { background: var(--surface2); }

.sortable { cursor: pointer; }
.sortable:hover { color: var(--accent); }

.tag {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 12px;
  font-weight: 500;
}

.tag-organic { background: #22c55e22; color: var(--green); }
.tag-referral { background: #6366f122; color: var(--accent); }
.tag-level { background: #f59e0b22; color: var(--orange); }

/* Chart */
.chart-container {
  height: 200px;
  display: flex;
  align-items: flex-end;
  gap: 2px;
  padding-top: 20px;
}

.chart-bar-wrapper {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  min-width: 0;
}

.chart-bar {
  width: 100%;
  background: var(--accent);
  border-radius: 3px 3px 0 0;
  min-height: 2px;
  transition: height 0.3s;
}

.chart-label {
  font-size: 10px;
  color: var(--text-muted);
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  max-height: 50px;
  overflow: hidden;
}

.chart-count {
  font-size: 10px;
  color: var(--text-muted);
}

/* Pagination */
.pagination {
  display: flex;
  gap: 8px;
  justify-content: center;
  margin-top: 16px;
}

.pagination button {
  padding: 6px 14px;
  background: var(--surface2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  cursor: pointer;
  font-size: 13px;
}

.pagination button:hover { border-color: var(--accent); }
.pagination button.active { background: var(--accent); border-color: var(--accent); }
.pagination button:disabled { opacity: 0.4; cursor: default; }

@media (max-width: 768px) {
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .dashboard { padding: 16px; }
  table { font-size: 12px; }
  thead th, tbody td { padding: 8px 6px; }
}