/* 3Coach Admin Dashboard */

:root {
  --bg: #f8f9fa;
  --surface: #ffffff;
  --border: #e2e8f0;
  --text: #1a202c;
  --text-secondary: #64748b;
  --primary: #1D9E75;
  --danger: #E24B4A;
  --radius: 8px;
  --shadow: 0 1px 3px rgba(0,0,0,0.08);
}

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

body {
  font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  font-size: 14px;
}

/* --- Header --- */
.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 24px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}
.logo { font-size: 18px; font-weight: 700; }
.header-right { display: flex; align-items: center; gap: 12px; }
.last-update { font-size: 12px; color: var(--text-secondary); }

/* --- Buttons --- */
.btn {
  padding: 6px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  cursor: pointer;
  font-size: 13px;
  transition: all 0.15s;
}
.btn:hover { background: var(--bg); }
.btn-sm { padding: 4px 10px; font-size: 12px; }
.btn-ghost { border: none; color: var(--text-secondary); }
.btn-ghost:hover { color: var(--danger); background: transparent; }

/* --- Tabs --- */
.tabs {
  display: flex;
  gap: 0;
  padding: 0 24px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  overflow-x: auto;
}
.tab {
  padding: 12px 20px;
  border: none;
  background: none;
  cursor: pointer;
  font-size: 14px;
  color: var(--text-secondary);
  border-bottom: 2px solid transparent;
  transition: all 0.15s;
  white-space: nowrap;
  display: flex;
  align-items: center;
  gap: 6px;
}
.tab:hover { color: var(--text); }
.tab.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
  font-weight: 600;
}
.tab-icon { font-size: 16px; }

/* --- Controls --- */
.controls {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 24px;
  gap: 16px;
  flex-wrap: wrap;
}
.app-filter, .date-filter { display: flex; gap: 6px; }
.filter-btn {
  padding: 5px 12px;
  border: 1px solid var(--border);
  border-radius: 20px;
  background: var(--surface);
  cursor: pointer;
  font-size: 12px;
  transition: all 0.15s;
}
.filter-btn:hover { border-color: var(--primary); }
.filter-btn.active {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
}

/* --- Content --- */
.content {
  padding: 20px 24px;
  max-width: 1400px;
  margin: 0 auto;
}

/* --- Summary Cards --- */
.summary-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-bottom: 20px;
}
.summary-card {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 16px;
  box-shadow: var(--shadow);
}
.card-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
}
.card-icon { font-size: 20px; }
.card-title { font-weight: 600; font-size: 15px; }
.card-body { display: flex; flex-direction: column; gap: 6px; }
.card-stat {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.stat-label { font-size: 13px; color: var(--text-secondary); }
.stat-value { font-size: 15px; font-weight: 600; }
.summary-total {
  text-align: center;
  padding: 10px;
  background: var(--surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  margin-bottom: 20px;
}
.total-label { color: var(--text-secondary); margin-right: 8px; }
.total-value { font-size: 18px; font-weight: 700; color: var(--primary); }

/* --- Charts --- */
.chart-container {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 16px;
  box-shadow: var(--shadow);
  margin-bottom: 20px;
}
.chart-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 16px; margin-bottom: 20px; }
.chart-col { background: var(--surface); border-radius: var(--radius); padding: 12px; box-shadow: var(--shadow); }

h3 { margin: 20px 0 12px; font-size: 16px; font-weight: 600; }
h4 { margin: 8px 0; font-size: 14px; font-weight: 600; color: var(--text-secondary); }

/* --- Data Table --- */
.data-table-wrap { background: var(--surface); border-radius: var(--radius); box-shadow: var(--shadow); margin-bottom: 20px; overflow: hidden; }
.table-info { padding: 10px 16px; font-size: 12px; color: var(--text-secondary); border-bottom: 1px solid var(--border); }
.table-scroll { overflow-x: auto; }
.data-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.data-table th {
  text-align: left;
  padding: 10px 12px;
  background: var(--bg);
  font-weight: 600;
  font-size: 12px;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}
.data-table td { padding: 8px 12px; border-bottom: 1px solid var(--border); }
.data-table tr:hover td { background: #f1f5f9; }
.table-empty { padding: 40px; text-align: center; color: var(--text-secondary); }
.table-pagination { padding: 10px 16px; font-size: 12px; color: var(--text-secondary); border-top: 1px solid var(--border); }

/* --- Badges --- */
.app-badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 12px;
  font-size: 11px;
  font-weight: 600;
}
.severity-badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 12px;
  font-size: 11px;
  font-weight: 600;
}

/* --- Escalation Banner --- */
.escalation-banner {
  background: #FFEBEE;
  color: var(--danger);
  padding: 12px 20px;
  border-radius: var(--radius);
  font-weight: 600;
  margin-bottom: 16px;
  border-left: 4px solid var(--danger);
}

/* --- Heatmap --- */
.heatmap { border-collapse: collapse; font-size: 11px; margin-bottom: 20px; background: var(--surface); border-radius: var(--radius); overflow: hidden; }
.heatmap th, .heatmap td { padding: 4px 6px; text-align: center; }
.heatmap th { background: var(--bg); font-weight: 600; }
.heatmap-day { font-weight: 600; text-align: right; padding-right: 8px; }
.heatmap-cell { min-width: 24px; color: white; font-size: 10px; border-radius: 2px; }

/* --- Cohort Table --- */
.cohort-table { border-collapse: collapse; font-size: 13px; margin-bottom: 16px; width: 100%; }
.cohort-table th, .cohort-table td { padding: 8px 12px; text-align: center; border: 1px solid var(--border); }
.cohort-table th { background: var(--bg); font-weight: 600; }
.cohort-cell { color: white; font-weight: 600; text-shadow: 0 1px 2px rgba(0,0,0,0.3); }

/* --- Activity Heatmap --- */
.activity-heatmap { background: var(--surface); border-radius: var(--radius); padding: 12px; box-shadow: var(--shadow); margin-bottom: 16px; }
.heatmap-row { display: flex; align-items: center; gap: 2px; margin-bottom: 3px; }
.heatmap-uid { width: 50px; font-size: 10px; color: var(--text-secondary); font-family: monospace; flex-shrink: 0; }
.heatmap-dot { width: 10px; height: 10px; border-radius: 2px; background: #e2e8f0; flex-shrink: 0; }
.heatmap-dot.active { background: var(--primary); }

/* --- Funnel --- */
.funnel { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 16px; margin-bottom: 20px; }
.funnel-app { background: var(--surface); border-radius: var(--radius); padding: 12px; box-shadow: var(--shadow); }
.funnel-bar { margin-top: 8px; }
.funnel-step { padding: 6px 10px; border-radius: 4px; margin-bottom: 4px; font-size: 12px; }

/* --- Login --- */
.login-container {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  background: var(--bg);
}
.login-card {
  background: var(--surface);
  padding: 40px;
  border-radius: 12px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.08);
  text-align: center;
  width: 340px;
}
.login-card h1 { font-size: 22px; margin-bottom: 4px; }
.login-subtitle { color: var(--text-secondary); margin-bottom: 24px; font-size: 13px; }
.login-card input {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 14px;
  margin-bottom: 12px;
  outline: none;
}
.login-card input:focus { border-color: var(--primary); }
.login-card button {
  width: 100%;
  padding: 10px;
  background: var(--primary);
  color: white;
  border: none;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
}
.login-card button:hover { opacity: 0.9; }
.login-error { color: var(--danger); font-size: 13px; margin-top: 8px; }

/* --- Loading --- */
.loading { text-align: center; padding: 60px; color: var(--text-secondary); }
.spinner {
  display: inline-block;
  width: 24px;
  height: 24px;
  border: 3px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin-bottom: 8px;
}
@keyframes spin { to { transform: rotate(360deg); } }

.error-msg { text-align: center; padding: 40px; color: var(--danger); }
.empty-note { color: var(--text-secondary); font-size: 13px; padding: 12px 0; }

/* --- Footer --- */
.footer {
  text-align: center;
  padding: 20px;
  font-size: 12px;
  color: var(--text-secondary);
  border-top: 1px solid var(--border);
  margin-top: 40px;
}

/* --- Responsive --- */
@media (max-width: 768px) {
  .header { padding: 10px 16px; }
  .content { padding: 16px; }
  .controls { padding: 10px 16px; }
  .summary-cards { grid-template-columns: 1fr; }
  .tabs { padding: 0 8px; }
  .tab { padding: 10px 12px; font-size: 13px; }
  .tab-label { display: none; }
  .tab-icon { font-size: 20px; }
}