/* ==========================================================================
   Executive Finance Dashboard — styles
   Palette: off-white/dark-neutral base, confident teal accent, rose for
   negative/overdue, amber for partial/attention states.
   ========================================================================== */

:root {
  --bg: #fafaf8;
  --surface: #ffffff;
  --surface-alt: #f1f1ee;
  --border: #e5e5e1;
  --border-strong: #d5d5cf;
  --text: #0a0a0f;
  --text-muted: #5c5c66;
  --text-faint: #94949c;

  --accent: #06aea3;
  --accent-strong: #058f86;
  --accent-soft: #d9f3f1;

  --purple: #5b49d3;
  --purple-strong: #4a3ab3;
  --purple-soft: #e7e4fa;

  --positive: #0f8a5f;
  --positive-soft: #e5f5ec;
  --negative: #c23a3a;
  --negative-soft: #fbeaea;
  --warning: #b7791f;
  --warning-soft: #fbf1de;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;

  --font-body: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Inter', Helvetica, Arial, sans-serif;
  --font-num: 'Segoe UI', -apple-system, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 14px;
  -webkit-font-smoothing: antialiased;
}

/* ---------------------------------------------------------------- topbar */

.app-sticky-header {
  position: sticky;
  top: 0;
  z-index: 20;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 28px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
  gap: 12px;
}

.topbar-left {
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.brand-lockup {
  display: flex;
  align-items: center;
  gap: 8px;
}

.brand-logo {
  height: 22px;
  width: auto;
  display: block;
}

.brand-word {
  font-weight: 700;
  letter-spacing: 0.02em;
  font-size: 17px;
  color: var(--text);
}

.brand-sub {
  font-size: 13px;
  color: var(--text-muted);
}

.topbar-right {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}

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

.control {
  font-family: inherit;
  font-size: 13px;
  padding: 7px 10px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-strong);
  background: var(--surface-alt);
  color: var(--text);
}

.control:focus { outline: 2px solid var(--accent-soft); border-color: var(--accent); }

.date-sep { color: var(--text-faint); }

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--accent);
  color: #fff;
  border: none;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s ease;
}

.btn-primary:hover { background: var(--accent-strong); }
.btn-primary:disabled { opacity: 0.7; cursor: default; }

.spinner {
  width: 13px;
  height: 13px;
  border-radius: 50%;
  border: 2px solid rgba(255,255,255,0.4);
  border-top-color: #fff;
  animation: spin 0.7s linear infinite;
}

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

.last-updated {
  font-size: 12px;
  color: var(--text-faint);
  white-space: nowrap;
}

/* ---------------------------------------------------------------- tabbar */

.tabbar {
  display: flex;
  gap: 4px;
  padding: 0 28px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  overflow-x: auto;
}

.tab {
  font-family: inherit;
  font-size: 13.5px;
  font-weight: 600;
  color: var(--text-muted);
  background: none;
  border: none;
  padding: 12px 16px;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  white-space: nowrap;
  transition: color 0.15s ease, border-color 0.15s ease;
}

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

.tab.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

/* ---------------------------------------------------------------- layout */

.app {
  max-width: 1280px;
  margin: 0 auto;
  padding: 28px;
}

.panel-header {
  margin-bottom: 20px;
}

.panel-header h1 {
  font-size: 21px;
  margin: 0 0 4px;
  font-weight: 700;
}

.panel-header p {
  margin: 0;
  color: var(--text-muted);
  font-size: 13.5px;
}

/* ---------------------------------------------------------------- kpis */

.kpi-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin-bottom: 24px;
}

.kpi-row.kpi-3 { grid-template-columns: repeat(3, 1fr); }

.kpi-card {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 18px 20px;
  overflow: hidden;
  box-shadow: 0 1px 2px rgba(10, 10, 15, 0.03);
  transition: box-shadow 0.2s ease, transform 0.2s ease, border-color 0.2s ease;
}

.kpi-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--purple));
  opacity: 0;
  transition: opacity 0.2s ease;
}

.kpi-card:hover {
  box-shadow: 0 8px 20px rgba(10, 10, 15, 0.07);
  border-color: var(--border-strong);
  transform: translateY(-1px);
}

.kpi-card:hover::before { opacity: 1; }

.kpi-label {
  font-size: 12px;
  color: var(--text-muted);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 10px;
}

.kpi-value {
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
  font-size: 27px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
  margin-bottom: 6px;
}

.kpi-caption {
  font-size: 12.5px;
  color: var(--text-faint);
}

.trend {
  font-size: 12.5px;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 3px;
  padding: 2px 8px 2px 6px;
  border-radius: 999px;
}

.trend.up { color: var(--positive); background: var(--positive-soft); }
.trend.down { color: var(--negative); background: var(--negative-soft); }

/* ---------------------------------------------------------------- cards/sections */

.section {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 22px 24px;
  margin-bottom: 20px;
  min-width: 0;
  box-shadow: 0 1px 2px rgba(10, 10, 15, 0.03);
}

.section-title {
  font-size: 14.5px;
  font-weight: 700;
  margin: 0 0 16px;
  padding-left: 12px;
  border-left: 3px solid var(--accent);
  letter-spacing: -0.01em;
}

.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.chart-wrap {
  position: relative;
  height: 280px;
}

/* ---------------------------------------------------------------- tables */

table {
  width: 100%;
  border-collapse: collapse;
  font-variant-numeric: tabular-nums;
}

thead th {
  text-align: left;
  font-size: 11.5px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-muted);
  font-weight: 700;
  padding: 10px 12px;
  border-bottom: 1px solid var(--border-strong);
  white-space: nowrap;
  background: var(--surface-alt);
}

thead th:first-child { border-top-left-radius: var(--radius-sm); }
thead th:last-child { border-top-right-radius: var(--radius-sm); }

thead th.num, td.num { text-align: right; }

tbody td {
  padding: 11px 12px;
  border-bottom: 1px solid var(--border);
  font-size: 13.5px;
  color: var(--text);
  white-space: nowrap;
}

tbody tr { transition: background 0.12s ease; }

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

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

tbody tr.total-row td {
  font-weight: 700;
  border-top: 2px solid var(--accent);
  border-bottom: none;
  background: var(--accent-soft);
}

tbody tr.total-row:hover td { background: var(--accent-soft); }

tbody tr.group-row td {
  font-weight: 700;
  color: var(--purple);
  font-size: 11.5px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  padding-top: 16px;
  border-bottom: 1px solid var(--border);
  background: none;
}

tbody tr.group-row:hover td { background: none; }

.table-scroll { overflow-x: auto; border-radius: var(--radius-sm); }

/* ---------------------------------------------------------------- status pills */

.pill {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.01em;
}

.pill-paid { background: var(--positive-soft); color: var(--positive); }
.pill-partial { background: var(--warning-soft); color: var(--warning); }
.pill-overdue { background: var(--negative-soft); color: var(--negative); }

/* ---------------------------------------------------------------- empty / error states */

.empty-state {
  padding: 24px 12px;
  text-align: center;
  color: var(--text-faint);
  font-size: 13px;
}

.error-banner {
  background: var(--negative-soft);
  color: var(--negative);
  border: 1px solid var(--negative);
  border-radius: var(--radius-md);
  padding: 14px 18px;
  margin-bottom: 20px;
  font-size: 13px;
}

/* ---------------------------------------------------------------- skeleton */

.skeleton-wrap { padding: 4px 0; }

.skeleton-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin-bottom: 20px;
}

.skel-card, .skel-table {
  background: linear-gradient(90deg, var(--surface-alt) 25%, var(--border) 37%, var(--surface-alt) 63%);
  background-size: 400% 100%;
  animation: shimmer 1.4s ease infinite;
  border-radius: var(--radius-lg);
}

.skel-card { height: 96px; }
.skel-table { height: 260px; }

@keyframes shimmer {
  0% { background-position: 100% 0; }
  100% { background-position: -100% 0; }
}

/* ---------------------------------------------------------------- responsive */

@media (max-width: 1024px) {
  .kpi-row, .kpi-row.kpi-3 { grid-template-columns: repeat(2, 1fr); }
  .grid-2 { grid-template-columns: 1fr; }
  .skeleton-row { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
  .topbar { flex-direction: column; align-items: stretch; }
  .topbar-right { flex-direction: column; align-items: stretch; justify-content: flex-start; gap: 10px; }
  .date-filter { flex-wrap: wrap; }
  .date-filter .control { flex: 1 1 100px; min-width: 0; }
  .btn-primary { justify-content: center; }
  .kpi-row, .kpi-row.kpi-3 { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  .kpi-card { padding: 14px 12px; }
  .kpi-label { font-size: 11px; margin-bottom: 6px; }
  .kpi-value { font-size: 19px; margin-bottom: 4px; }
  .kpi-caption, .trend { font-size: 11px; }
  .app { padding: 16px; }
}