/* ============================================
   Insights Dashboard — Styles
   ============================================ */

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: #0f1117;
  color: #e1e4e8;
  min-height: 100vh;
}

/* ---- Login Screen ---- */
.login-box {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
  padding: 3rem;
  background: #1c1f26;
  border-radius: 12px;
  border: 1px solid #2d333b;
}

.login-box h1 {
  font-size: 1.8rem;
  margin-bottom: 0.5rem;
  color: #fff;
}

.login-box p {
  color: #8b949e;
  margin-bottom: 1.5rem;
}

/* ---- Buttons ---- */
.btn {
  padding: 0.6rem 1.2rem;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 500;
  transition: background 0.15s;
}

.btn-primary {
  background: #2f81f7;
  color: #fff;
}
.btn-primary:hover { background: #1f6feb; }

.btn-small {
  padding: 0.3rem 0.8rem;
  font-size: 0.8rem;
  background: #21262d;
  color: #c9d1d9;
  border: 1px solid #30363d;
}
.btn-small:hover { background: #30363d; }

/* ---- Header ---- */
header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.8rem 1.5rem;
  background: #161b22;
  border-bottom: 1px solid #21262d;
}

.header-left h1 {
  font-size: 1.2rem;
  color: #fff;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  font-size: 0.8rem;
  color: #8b949e;
}

/* ---- Date Range Selector ---- */
.date-range-select {
  padding: 0.3rem 0.6rem;
  font-size: 0.8rem;
  background: #21262d;
  color: #c9d1d9;
  border: 1px solid #30363d;
  border-radius: 6px;
  cursor: pointer;
  outline: none;
}
.date-range-select:hover { border-color: #484f58; }
.date-range-select:focus { border-color: #2f81f7; }

/* ---- Delta Indicators ---- */
.delta-up {
  color: #3fb950;
  font-size: 0.7em;
  font-weight: 500;
}
.delta-down {
  color: #f85149;
  font-size: 0.7em;
  font-weight: 500;
}

/* ---- Loading ---- */
.loading-overlay {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(15, 17, 23, 0.85);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 100;
}

.spinner {
  width: 40px; height: 40px;
  border: 3px solid #21262d;
  border-top-color: #2f81f7;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

.loading-text {
  margin-top: 1rem;
  color: #8b949e;
}

/* ---- Error Banner ---- */
.error-banner {
  padding: 0.6rem 1.5rem;
  background: #3d1f1f;
  color: #f85149;
  font-size: 0.85rem;
  border-bottom: 1px solid #5a2020;
}

/* ---- Tabs ---- */
.tabs {
  display: flex;
  gap: 0;
  padding: 0 1.5rem;
  background: #161b22;
  border-bottom: 1px solid #21262d;
}

.tab {
  padding: 0.7rem 1.2rem;
  background: none;
  border: none;
  color: #8b949e;
  font-size: 0.9rem;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: color 0.15s, border-color 0.15s;
}

.tab:hover { color: #c9d1d9; }
.tab.active {
  color: #fff;
  border-bottom-color: #2f81f7;
}

/* ---- Tab Content ---- */
.tab-content {
  padding: 1.5rem;
}

/* ---- Scorecards ---- */
.scorecards {
  display: flex;
  gap: 1rem;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}

.scorecard {
  background: #1c1f26;
  border: 1px solid #2d333b;
  border-radius: 8px;
  padding: 1rem 1.5rem;
  min-width: 160px;
  flex: 1;
}

.scorecard-label {
  font-size: 0.75rem;
  color: #8b949e;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 0.3rem;
}

.scorecard-value {
  font-size: 1.8rem;
  font-weight: 700;
  color: #fff;
}

.scorecard-value.green { color: #3fb950; }
.scorecard-value.red { color: #f85149; }
.scorecard-value.yellow { color: #d29922; }

/* ---- Chart Grid ---- */
.chart-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.chart-card {
  background: #1c1f26;
  border: 1px solid #2d333b;
  border-radius: 8px;
  padding: 1rem;
}

.chart-card.wide {
  grid-column: 1 / -1;
}

.chart-card h3 {
  font-size: 0.85rem;
  color: #8b949e;
  margin-bottom: 0.8rem;
  font-weight: 500;
}

.chart-card canvas {
  max-height: 280px;
}

/* ---- Data Tables ---- */
.data-table {
  overflow-x: auto;
}

.data-table table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.8rem;
}

.data-table th {
  text-align: left;
  padding: 0.5rem 0.8rem;
  color: #8b949e;
  font-weight: 500;
  border-bottom: 1px solid #21262d;
  white-space: nowrap;
}

.data-table td {
  padding: 0.5rem 0.8rem;
  border-bottom: 1px solid #161b22;
  white-space: nowrap;
}

.data-table tr:hover td {
  background: #161b22;
}

/* ---- Empty State ---- */
.empty-state {
  color: #484f58;
  font-size: 0.85rem;
  padding: 1rem;
  text-align: center;
}

/* ---- Responsive ---- */
@media (max-width: 900px) {
  .chart-grid { grid-template-columns: 1fr; }
  .scorecards { flex-direction: column; }
}