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

:root {
  --bg: #0b0e14;
  --surface: #131720;
  --surface-hover: #1a1f2e;
  --border: #1e2433;
  --text: #e4e8f1;
  --text-dim: #7a8299;
  --accent: #4f8fff;
  --accent-glow: rgba(79, 143, 255, 0.15);
  --green: #34d399;
  --green-dim: rgba(52, 211, 153, 0.15);
  --red: #f87171;
  --red-dim: rgba(248, 113, 113, 0.15);
  --yellow: #fbbf24;
  --yellow-dim: rgba(251, 191, 36, 0.15);
  --purple: #a78bfa;
  --purple-dim: rgba(167, 139, 250, 0.15);
  --radius: 12px;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.5;
}

/* ─── Header ───────────────────────────────────────────────────────── */
.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 32px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(12px);
}

.header h1 {
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.header-subtitle {
  color: var(--text-dim);
  font-size: 0.8rem;
  margin-left: 12px;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.date-picker-group {
  display: flex;
  align-items: center;
  gap: 6px;
}

.preset-btn {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-dim);
  padding: 6px 12px;
  border-radius: 8px;
  font-size: 0.78rem;
  cursor: pointer;
  transition: all 0.2s;
}

.preset-btn:hover, .preset-btn.active {
  background: var(--accent-glow);
  color: var(--accent);
  border-color: var(--accent);
}

#dateRange {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 6px 14px;
  border-radius: 8px;
  font-size: 0.82rem;
  width: 200px;
  cursor: pointer;
}

#dateRange:focus {
  outline: none;
  border-color: var(--accent);
}

.refresh-btn {
  background: var(--accent-glow);
  border: 1px solid var(--accent);
  color: var(--accent);
  width: 36px;
  height: 36px;
  border-radius: 8px;
  font-size: 1.1rem;
  cursor: pointer;
  transition: all 0.2s;
}

.refresh-btn:hover {
  background: var(--accent);
  color: white;
}

/* ─── Loading ──────────────────────────────────────────────────────── */
.loading {
  position: fixed;
  inset: 0;
  background: rgba(11, 14, 20, 0.85);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  backdrop-filter: blur(4px);
  transition: opacity 0.3s;
}

.loading.hidden {
  opacity: 0;
  pointer-events: none;
}

.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

.loading p {
  margin-top: 16px;
  color: var(--text-dim);
  font-size: 0.9rem;
}

/* ─── Error ────────────────────────────────────────────────────────── */
.error-banner {
  background: var(--red-dim);
  border: 1px solid var(--red);
  color: var(--red);
  padding: 12px 20px;
  margin: 16px 32px 0;
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
}

.error-banner.hidden { display: none; }

.error-banner button {
  background: none;
  border: none;
  color: var(--red);
  font-size: 1.2rem;
  cursor: pointer;
}

/* ─── Dashboard ────────────────────────────────────────────────────── */
.dashboard {
  padding: 24px 32px;
  max-width: 1600px;
  margin: 0 auto;
}

/* ─── KPI Grid ─────────────────────────────────────────────────────── */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}

.kpi-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  display: flex;
  align-items: center;
  gap: 14px;
  transition: all 0.2s;
}

.kpi-card:hover {
  background: var(--surface-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.kpi-icon {
  font-size: 1.6rem;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-glow);
  border-radius: 10px;
  flex-shrink: 0;
}

.kpi-card[data-kpi="pipeline"] .kpi-icon { background: var(--purple-dim); }
.kpi-card[data-kpi="wonDeals"] .kpi-icon { background: var(--green-dim); }
.kpi-card[data-kpi="openInvoices"] .kpi-icon { background: var(--yellow-dim); }
.kpi-card[data-kpi="overdueInvoices"] .kpi-icon { background: var(--red-dim); }
.kpi-card[data-kpi="hours"] .kpi-icon { background: var(--accent-glow); }
.kpi-card[data-kpi="effRate"] .kpi-icon { background: var(--green-dim); }
.kpi-card[data-kpi="planVsActual"] .kpi-icon { background: var(--purple-dim); }
.kpi-card[data-kpi="neglected"] .kpi-icon { background: var(--red-dim); }

.kpi-content {
  display: flex;
  flex-direction: column;
}

.kpi-value {
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.kpi-label {
  font-size: 0.78rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.kpi-sub {
  font-size: 0.72rem;
  color: var(--red);
  margin-top: 2px;
}

.kpi-highlight .kpi-value { color: var(--green); }

/* ─── Tab Navigation ──────────────────────────────────────────────── */
.tab-nav {
  display: flex;
  gap: 4px;
  margin-bottom: 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 4px;
}

.tab-btn {
  flex: 1;
  padding: 10px 16px;
  background: none;
  border: none;
  color: var(--text-dim);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  border-radius: 8px;
  transition: all 0.2s;
}

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

.tab-btn.active {
  background: var(--accent-glow);
  color: var(--accent);
  font-weight: 600;
}

/* ─── Tab Content ─────────────────────────────────────────────────── */
.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

/* ─── Charts ───────────────────────────────────────────────────────── */
.charts-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

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

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

.chart-card h3 {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-dim);
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.chart-card canvas {
  width: 100% !important;
  max-height: 320px;
}

/* ─── Section Cards ───────────────────────────────────────────────── */
.section-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
}

.section-card h3 {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-dim);
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

/* ─── Tables ───────────────────────────────────────────────────────── */
.table-wrapper {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
}

th, td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  font-size: 0.85rem;
  white-space: nowrap;
}

th {
  color: var(--text-dim);
  font-weight: 600;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

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

tbody tr:last-child td {
  border-bottom: none;
}

.cell-green { color: var(--green); font-weight: 600; }
.cell-red { color: var(--red); font-weight: 600; }
.cell-yellow { color: var(--yellow); font-weight: 600; }

/* Row highlighting for neglected customers */
tr.row-danger { background: rgba(248, 113, 113, 0.08); }
tr.row-danger:hover { background: rgba(248, 113, 113, 0.15); }
tr.row-warning { background: rgba(251, 191, 36, 0.06); }
tr.row-warning:hover { background: rgba(251, 191, 36, 0.12); }

/* ─── Stat Grid ───────────────────────────────────────────────────── */
.stat-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.stat-item {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px;
}

.stat-label {
  font-size: 0.72rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 6px;
}

.stat-value {
  font-size: 1.3rem;
  font-weight: 700;
}

.stat-value.green { color: var(--green); }
.stat-value.red { color: var(--red); }
.stat-value.yellow { color: var(--yellow); }
.stat-value.purple { color: var(--purple); }
.stat-value.accent { color: var(--accent); }

/* ─── Health Score Badge ──────────────────────────────────────────── */
.health-badge {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 12px;
  font-size: 0.78rem;
  font-weight: 600;
}

.health-badge.good { background: var(--green-dim); color: var(--green); }
.health-badge.ok { background: var(--yellow-dim); color: var(--yellow); }
.health-badge.bad { background: var(--red-dim); color: var(--red); }

/* ─── Responsive ───────────────────────────────────────────────────── */
@media (max-width: 1200px) {
  .kpi-grid { grid-template-columns: repeat(2, 1fr); }
  .charts-row { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .header {
    flex-direction: column;
    gap: 12px;
    padding: 16px;
  }
  .header-right {
    width: 100%;
    flex-wrap: wrap;
  }
  .date-picker-group {
    flex-wrap: wrap;
  }
  .kpi-grid { grid-template-columns: 1fr; }
  .dashboard { padding: 16px; }
  .tab-nav { flex-wrap: wrap; }
  .tab-btn { flex: unset; }
}