/* ============================================================================
   Meta Ads Dashboard — Juejati Brokers
   Vanilla CSS — sin preprocesador, sin framework, sin dependencias externas.
   Estructura segun UI-SPEC CSS Architecture.
   ============================================================================ */

/* ── 1. CSS custom properties ─────────────────────────────────────────────── */

:root {
  --color-bg: #0f1117;
  --color-surface: #1a1d27;
  --color-surface-raised: #232736;
  --color-border: #2d3148;
  --color-text-primary: #e8eaf0;
  --color-text-secondary: #8b90a7;
  --color-text-muted: #565c78;
  --color-accent: #4f7eff;
  --color-success: #22c55e;
  --color-warning: #f59e0b;
  --color-destructive: #ef4444;

  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;

  --text-body: 0.875rem;    /* 14px */
  --text-label: 0.75rem;    /* 12px */
  --text-heading: 1.125rem; /* 18px */
  --text-display: 1.5rem;   /* 24px */
}

/* ── 2. Reset ─────────────────────────────────────────────────────────────── */

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

/* ── 3. Base ──────────────────────────────────────────────────────────────── */

html {
  font-size: 16px;
}

body {
  /* min-width body para GHL iframe — UX-01 */
  min-width: 360px;
  background: var(--color-bg);
  color: var(--color-text-primary);
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: var(--text-body);
  font-weight: 400;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

/* Accessibility — focus visible en todos los interactivos */
*:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* ── 4. Layout ────────────────────────────────────────────────────────────── */

.dashboard-shell {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--space-lg) var(--space-md);
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
}

.dashboard-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
}

.account-name {
  font-size: var(--text-heading);
  font-weight: 700;
  color: var(--color-text-primary);
}

.section {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
}

.section-title {
  font-size: var(--text-heading);
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-text-primary);
}

.section-meta {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

/* ── 5. KPI cards ─────────────────────────────────────────────────────────── */

.kpi-strip {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-md);
}

.kpi-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: var(--space-md);
}

.kpi-label {
  font-size: var(--text-label);
  font-weight: 400;
  color: var(--color-text-secondary);
}

.kpi-value {
  font-size: var(--text-display);
  font-weight: 700;
  line-height: 1.1;
  color: var(--color-text-primary);
  font-variant-numeric: tabular-nums;
}

.kpi-period {
  font-size: var(--text-label);
  font-weight: 400;
  color: var(--color-text-muted);
}

/* ── 6. Date selector ─────────────────────────────────────────────────────── */

.date-selector {
  display: flex;
  gap: var(--space-xs);
  background: var(--color-surface);
  border-radius: 8px;
  padding: var(--space-xs);
}

.date-btn {
  min-height: 40px;
  padding: var(--space-sm) var(--space-md);
  background: transparent;
  color: var(--color-text-secondary);
  border: none;
  border-bottom: 2px solid transparent;
  border-radius: 4px;
  font-family: inherit;
  font-size: var(--text-label);
  font-weight: 400;
  cursor: pointer;
  transition: background 0.12s ease, color 0.12s ease;
}

.date-btn:hover {
  background: var(--color-surface-raised);
  color: var(--color-text-primary);
}

.date-btn--active {
  background: var(--color-surface-raised);
  color: var(--color-text-primary);
  border-bottom: 2px solid var(--color-accent);
  border-bottom-left-radius: 0;
  border-bottom-right-radius: 0;
}

/* ── 7. Campaign table ────────────────────────────────────────────────────── */

.campaign-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  overflow: hidden;
}

.campaign-table thead th {
  font-size: var(--text-label);
  font-weight: 400;
  color: var(--color-text-secondary);
  text-align: left;
  padding: var(--space-sm) var(--space-md);
  border-bottom: 1px solid var(--color-border);
}

.campaign-table tbody td {
  font-size: var(--text-body);
  color: var(--color-text-primary);
  padding: var(--space-sm) var(--space-md);
  border-bottom: 1px solid var(--color-border);
  min-height: 36px;
}

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

.campaign-table tbody tr:hover {
  background: var(--color-surface-raised);
}

.col-numeric {
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.cell-name {
  max-width: 200px;
}

.campaign-name {
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.status-badge {
  display: inline-block;
  font-size: var(--text-label);
  font-weight: 700;
  border-radius: 4px;
  padding: 2px 8px;
  background: var(--color-surface-raised);
  color: var(--color-text-secondary);
}

.status-badge--active {
  background: rgba(34,197,94,0.15);
  color: var(--color-success);
}

.status-badge--paused {
  background: rgba(245,158,11,0.15);
  color: var(--color-warning);
}

/* ── 8. Loading states ────────────────────────────────────────────────────── */

@keyframes shimmer {
  0%   { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

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

.skeleton {
  background: linear-gradient(
    90deg,
    var(--color-surface-raised) 25%,
    var(--color-border) 50%,
    var(--color-surface-raised) 75%
  );
  background-size: 200% 100%;
  animation: shimmer 1.5s linear infinite;
  border-radius: 4px;
}

.skeleton--label  { height: 12px; width: 60px;  margin-bottom: var(--space-xs); }
.skeleton--value  { height: 16px; width: 80px; }
.skeleton--period { height: 12px; width: 70px;  margin-top: var(--space-xs); }
.skeleton--row    { height: 36px; width: 100%; }

.skeleton-row td {
  padding: var(--space-xs) var(--space-md);
}

.spinner {
  display: none;
  width: 16px;
  height: 16px;
  border: 2px solid var(--color-border);
  border-top-color: var(--color-accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  vertical-align: middle;
}

.spinner--visible {
  display: inline-block;
}

/* ── 9. Error state ───────────────────────────────────────────────────────── */

.error-card {
  background: rgba(239,68,68,0.08);
  border: 1px solid rgba(239,68,68,0.3);
  border-radius: 8px;
  padding: var(--space-md);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.error-card::before {
  content: "! ";
  color: var(--color-destructive);
  font-weight: 700;
}

.error-title {
  font-size: var(--text-body);
  font-weight: 700;
  color: var(--color-text-primary);
}

.error-body {
  font-size: var(--text-body);
  color: var(--color-text-secondary);
}

.retry-btn {
  align-self: flex-start;
  background: transparent;
  border: 1px solid var(--color-accent);
  color: var(--color-accent);
  padding: var(--space-xs) var(--space-md);
  border-radius: 4px;
  font-family: inherit;
  font-size: var(--text-label);
  cursor: pointer;
  transition: background 0.12s ease;
}

.retry-btn:hover  { background: rgba(79,126,255,0.08); }
.retry-btn:active { background: rgba(79,126,255,0.16); }

/* Empty state */
.empty-state {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: var(--space-lg);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.empty-title {
  font-size: var(--text-body);
  font-weight: 700;
  color: var(--color-text-primary);
}

.empty-body {
  font-size: var(--text-body);
  color: var(--color-text-secondary);
}

/* ── 10. Timestamps ───────────────────────────────────────────────────────── */

.last-updated {
  font-size: var(--text-label);
  font-weight: 400;
  color: var(--color-text-muted);
}

/* ── 11. Responsive breakpoints ───────────────────────────────────────────── */

/* Tablet — 600px+: KPI grid 3 columnas, tabla completa */
@media (min-width: 600px) {
  .kpi-strip {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* Desktop — 900px+: KPI grid 6 columnas (1 fila, above fold UX-02) */
@media (min-width: 900px) {
  .kpi-strip {
    grid-template-columns: repeat(6, 1fr);
  }

  .dashboard-shell {
    padding: var(--space-3xl) var(--space-xl);
  }
}

/* Mobile — < 600px: cada fila de tabla se convierte en card */
@media (max-width: 599px) {
  .campaign-table {
    background: transparent;
    border: none;
  }

  .campaign-table thead {
    display: none;
  }

  .campaign-table tbody tr {
    display: block;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    padding: var(--space-sm);
    margin-bottom: var(--space-sm);
  }

  .campaign-table tbody tr:hover {
    background: var(--color-surface);
  }

  .campaign-table tbody td {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-xs) 0;
    border: none;
  }

  .campaign-table tbody td::before {
    content: attr(data-label);
    color: var(--color-text-secondary);
    font-size: var(--text-label);
    font-weight: 700;
  }

  .cell-name {
    max-width: none;
  }

  .skeleton-row td {
    display: block;
    padding: var(--space-xs) 0;
  }

  .skeleton-row td::before {
    content: none;
  }
}