/**
 * Estilos canónicos del Simulador de fatiga y forma física (Modelo Bannister / TSS, CTL, ATL, TSB)
 * Fijate Tools - fijate.com
 */

:root {
  --font-main: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-heading: 'Outfit', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Colores temáticos Midnight Slate (Oscuro por defecto) */
  --bg-page: #0b0f17;
  --bg-card: #131b2a;
  --bg-card-hover: #1a2538;
  --bg-card-alt: #182234;
  --bg-input: #0e1522;
  --bg-input-focus: #141f33;

  --border-subtle: #1e293b;
  --border-focus: #38bdf8;
  --border-active: #0ea5e9;

  --text-main: #f1f5f9;
  --text-muted: #94a3b8;
  --text-dim: #64748b;

  /* Paleta atlética PMC de alto contraste */
  --pmc-ctl: #06b6d4;         /* Azul Cian - CTL / Fitness */
  --pmc-ctl-bg: rgba(6, 182, 212, 0.12);
  --pmc-atl: #f43f5e;         /* Magenta Rosa - ATL / Fatigue */
  --pmc-atl-bg: rgba(244, 63, 94, 0.12);
  --pmc-tsb: #10b981;         /* Verde Esmeralda - TSB / Freshness */
  --pmc-tsb-bg: rgba(16, 185, 129, 0.12);
  --pmc-tsb-neg: #ef4444;     /* Rojo Alerta - TSB Crítico */
  --pmc-tsb-warn: #f59e0b;    /* Ámbar - Destrenamiento */

  --accent: #38bdf8;
  --accent-hover: #0ea5e9;
  --accent-glow: rgba(56, 189, 248, 0.25);

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-full: 9999px;

  --shadow-card: 0 4px 20px -2px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 0 25px rgba(14, 165, 233, 0.15);
}

[data-theme="light"] {
  --bg-page: #f8fafc;
  --bg-card: #ffffff;
  --bg-card-hover: #f1f5f9;
  --bg-card-alt: #f8fafc;
  --bg-input: #f1f5f9;
  --bg-input-focus: #e2e8f0;

  --border-subtle: #e2e8f0;
  --border-focus: #0284c7;
  --border-active: #0369a1;

  --text-main: #0f172a;
  --text-muted: #475569;
  --text-dim: #64748b;

  --pmc-ctl: #0891b2;
  --pmc-ctl-bg: rgba(8, 145, 178, 0.1);
  --pmc-atl: #e11d48;
  --pmc-atl-bg: rgba(225, 29, 72, 0.1);
  --pmc-tsb: #059669;
  --pmc-tsb-bg: rgba(5, 150, 105, 0.1);
  --pmc-tsb-neg: #dc2626;
  --pmc-tsb-warn: #d97706;

  --accent: #0284c7;
  --accent-hover: #0369a1;
  --accent-glow: rgba(2, 132, 199, 0.15);

  --shadow-card: 0 4px 15px -1px rgba(0, 0, 0, 0.07);
}

/* Base & Contención */
*, *::before, *::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0;
  font-family: var(--font-main);
  background-color: var(--bg-page);
  color: var(--text-main);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  overflow-x: clip;
  width: 100%;
  max-width: 100%;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Layout Canónico */
.main-wrapper.tool-layout {
  max-width: 1200px;
  margin: 1.5rem auto 3rem;
  padding: 0 1rem;
  width: 100%;
  flex: 1 0 auto;
}

.tool-with-sidebar {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  width: 100%;
}

@media (min-width: 1536px) {
  .tool-with-sidebar {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 300px;
    gap: 2.5rem;
    align-items: start;
  }
}

.tool-main-content {
  min-width: 0;
  width: 100%;
}

/* Tarjeta principal */
.card-main {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-card);
  margin-bottom: 2rem;
}

@media (min-width: 768px) {
  .card-main {
    padding: 2.25rem;
  }
}

/* Hero Box & Tagline */
.tool-hero-box {
  margin-bottom: 2rem;
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 1.5rem;
}

.hero-tagline {
  font-size: 1.05rem;
  color: var(--text-muted);
  margin: 0 0 1rem;
  line-height: 1.6;
}

.quick-badges-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.pill-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.3rem 0.75rem;
  border-radius: var(--radius-full);
}

.pill-cyan { background: var(--pmc-ctl-bg); color: var(--pmc-ctl); border: 1px solid rgba(6, 182, 212, 0.25); }
.pill-magenta { background: var(--pmc-atl-bg); color: var(--pmc-atl); border: 1px solid rgba(244, 63, 94, 0.25); }
.pill-emerald { background: var(--pmc-tsb-bg); color: var(--pmc-tsb); border: 1px solid rgba(16, 185, 129, 0.25); }
.pill-amber { background: rgba(245, 158, 11, 0.12); color: #f59e0b; border: 1px solid rgba(245, 158, 11, 0.25); }
.pill-slate { background: var(--bg-card-alt); color: var(--text-muted); border: 1px solid var(--border-subtle); }

/* Barra de Presets de Demostración Rápida */
.presets-container {
  background: var(--bg-card-alt);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1rem;
  margin-bottom: 1.75rem;
}

.presets-label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-dim);
  margin-bottom: 0.75rem;
}

.presets-grid {
  display: grid;
  grid-template-columns: repeat(1, minmax(0, 1fr));
  gap: 0.5rem;
}

@media (min-width: 640px) {
  .presets-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1024px) {
  .presets-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.btn-preset {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  color: var(--text-main);
  padding: 0.65rem 0.85rem;
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  font-weight: 500;
  text-align: left;
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  min-height: 48px;
}

.btn-preset:hover {
  background: var(--bg-card-hover);
  border-color: var(--accent);
  transform: translateY(-1px);
}

.btn-preset.active {
  border-color: var(--accent);
  background: rgba(56, 189, 248, 0.08);
  box-shadow: 0 0 10px rgba(56, 189, 248, 0.15);
}

.preset-title {
  font-weight: 700;
  color: var(--text-main);
  font-size: 0.82rem;
}

.preset-desc {
  font-size: 0.72rem;
  color: var(--text-muted);
}

/* Panel de KPIs Métricas Principales */
.kpi-dashboard {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
  margin-bottom: 2rem;
}

@media (min-width: 768px) {
  .kpi-dashboard {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 1rem;
  }
}

.kpi-card {
  background: var(--bg-card-alt);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.15rem 1rem;
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.kpi-card:hover {
  transform: translateY(-2px);
}

.kpi-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
}

.kpi-card.kpi-ctl::before { background: var(--pmc-ctl); }
.kpi-card.kpi-atl::before { background: var(--pmc-atl); }
.kpi-card.kpi-tsb::before { background: var(--pmc-tsb); }
.kpi-card.kpi-ramp::before { background: #8b5cf6; }

.kpi-card.kpi-tsb-danger::before { background: var(--pmc-tsb-neg); }
.kpi-card.kpi-tsb-warning::before { background: var(--pmc-tsb-warn); }

.kpi-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.5rem;
}

.kpi-label {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-dim);
}

.kpi-subtext {
  font-size: 0.7rem;
  color: var(--text-muted);
}

.kpi-value-row {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  margin-bottom: 0.25rem;
}

.kpi-value {
  font-family: var(--font-mono);
  font-size: 1.85rem;
  font-weight: 800;
  line-height: 1;
}

.kpi-ctl .kpi-value { color: var(--pmc-ctl); }
.kpi-atl .kpi-value { color: var(--pmc-atl); }
.kpi-tsb .kpi-value { color: var(--pmc-tsb); }
.kpi-tsb-danger .kpi-value { color: var(--pmc-tsb-neg); }
.kpi-tsb-warning .kpi-value { color: var(--pmc-tsb-warn); }
.kpi-ramp .kpi-value { color: #a78bfa; }

.kpi-badge {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 600;
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-sm);
  margin-top: 0.35rem;
}

/* Banner de Alerta de Estado Fisiológico */
.status-alert-banner {
  border-radius: var(--radius-md);
  padding: 1rem 1.25rem;
  margin-bottom: 2rem;
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  border: 1px solid transparent;
  transition: all 0.3s ease;
}

.status-alert-icon {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
}

.status-alert-content {
  flex: 1;
  min-width: 0;
}

.status-alert-title {
  font-weight: 700;
  font-size: 0.95rem;
  margin: 0 0 0.25rem;
}

.status-alert-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin: 0;
  line-height: 1.5;
}

/* Variantes de alerta */
.alert-danger {
  background: rgba(239, 68, 68, 0.1);
  border-color: rgba(239, 68, 68, 0.3);
  color: #fca5a5;
}
.alert-danger .status-alert-title { color: #ef4444; }
.alert-danger .status-alert-icon { background: rgba(239, 68, 68, 0.2); color: #ef4444; }

.alert-optimal {
  background: rgba(6, 182, 212, 0.1);
  border-color: rgba(6, 182, 212, 0.3);
  color: #a5f3fc;
}
.alert-optimal .status-alert-title { color: #06b6d4; }
.alert-optimal .status-alert-icon { background: rgba(6, 182, 212, 0.2); color: #06b6d4; }

.alert-sweetspot {
  background: rgba(16, 185, 129, 0.1);
  border-color: rgba(16, 185, 129, 0.3);
  color: #a7f3d0;
}
.alert-sweetspot .status-alert-title { color: #10b981; }
.alert-sweetspot .status-alert-icon { background: rgba(16, 185, 129, 0.2); color: #10b981; }

.alert-warning {
  background: rgba(245, 158, 11, 0.1);
  border-color: rgba(245, 158, 11, 0.3);
  color: #fde68a;
}
.alert-warning .status-alert-title { color: #f59e0b; }
.alert-warning .status-alert-icon { background: rgba(245, 158, 11, 0.2); color: #f59e0b; }

.alert-neutral {
  background: rgba(148, 163, 184, 0.1);
  border-color: rgba(148, 163, 184, 0.25);
  color: #cbd5e1;
}
.alert-neutral .status-alert-title { color: #94a3b8; }
.alert-neutral .status-alert-icon { background: rgba(148, 163, 184, 0.2); color: #94a3b8; }

/* Contenedor Gráfica PMC Canvas */
.chart-section {
  background: var(--bg-card-alt);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  margin-bottom: 2rem;
}

.chart-header {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

@media (min-width: 640px) {
  .chart-header {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}

.chart-title-area {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
}

.chart-title {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 700;
  margin: 0;
}

.chart-subtitle {
  font-size: 0.8rem;
  color: var(--text-dim);
}

.chart-controls-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
}

.chart-legend {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.85rem;
  font-size: 0.78rem;
  color: var(--text-muted);
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  cursor: pointer;
  user-select: none;
}

.legend-item.dimmed {
  opacity: 0.35;
}

.legend-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.dot-ctl { background: var(--pmc-ctl); }
.dot-atl { background: var(--pmc-atl); }
.dot-tsb { background: var(--pmc-tsb); }
.dot-tss { background: #a855f7; }

.canvas-wrapper {
  position: relative;
  width: 100%;
  height: 380px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  overflow: hidden;
  touch-action: pan-y;
}

@media (max-width: 640px) {
  .canvas-wrapper {
    height: 300px;
  }
}

#pmcCanvas {
  display: block;
  width: 100%;
  height: 100%;
}

.chart-tooltip {
  position: absolute;
  pointer-events: none;
  background: rgba(15, 23, 42, 0.95);
  border: 1px solid var(--border-focus);
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-family: var(--font-mono);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.5);
  display: none;
  z-index: 20;
  line-height: 1.4;
  min-width: 130px;
}

[data-theme="light"] .chart-tooltip {
  background: rgba(255, 255, 255, 0.97);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.15);
}

/* Sección de Pestañas / Bloques de Gestión */
.tabs-navigation {
  display: flex;
  gap: 0.5rem;
  border-bottom: 1px solid var(--border-subtle);
  margin-bottom: 1.5rem;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.tab-btn {
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--text-muted);
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 600;
  padding: 0.75rem 1rem;
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.2s ease;
  min-height: 44px;
}

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

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

.tab-panel {
  display: none;
}

.tab-panel.active {
  display: block;
  animation: fadeIn 0.2s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Formularios & Controles táctiles */
.form-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  margin-bottom: 1.5rem;
}

@media (min-width: 768px) {
  .form-grid-2 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .form-grid-3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.form-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-main);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.form-label-help {
  font-size: 0.75rem;
  color: var(--text-dim);
  font-weight: 400;
}

.input-suffix-wrapper {
  display: flex;
  align-items: stretch;
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  transition: border-color 0.2s ease;
  overflow: hidden;
  height: 42px;
}

.input-suffix-wrapper:focus-within {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 2px rgba(56, 189, 248, 0.2);
}

.input-suffix-wrapper input {
  flex: 1 1 0%;
  width: 0;
  min-width: 0;
  background: transparent;
  border: none;
  padding: 0 0.75rem;
  color: var(--text-main);
  font-family: var(--font-mono);
  font-size: 0.95rem;
  outline: none;
}

.input-suffix {
  display: flex;
  align-items: center;
  padding: 0 0.75rem;
  background: rgba(255, 255, 255, 0.04);
  border-left: 1px solid var(--border-subtle);
  color: var(--text-dim);
  font-size: 0.8rem;
  font-weight: 500;
  user-select: none;
}

/* Desplegable Select Canónico anti-desbordamiento */
.select-wrapper {
  position: relative;
  width: 100%;
}

.select-wrapper select {
  width: 100%;
  max-width: 100%;
  min-width: 0;
  height: 42px;
  background-color: var(--bg-input);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-main);
  padding: 0 40px 0 0.85rem;
  font-size: 0.88rem;
  font-family: var(--font-main);
  appearance: none;
  -webkit-appearance: none;
  text-overflow: ellipsis;
  white-space: nowrap;
  overflow: hidden;
  outline: none;
  cursor: pointer;
}

.select-wrapper select:focus {
  border-color: var(--border-focus);
}

.select-wrapper select option {
  background-color: var(--bg-card);
  color: var(--text-main);
}

.select-wrapper .select-arrow {
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  pointer-events: none;
  color: var(--text-dim);
}

/* Botones de acción */
.btn-action-primary {
  background: linear-gradient(135deg, #0284c7 0%, #0369a1 100%);
  color: #ffffff;
  border: none;
  border-radius: var(--radius-sm);
  padding: 0.75rem 1.25rem;
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 42px;
  transition: all 0.2s ease;
  width: 100%;
}

.btn-action-primary:hover {
  background: linear-gradient(135deg, #0ea5e9 0%, #0284c7 100%);
  box-shadow: 0 4px 15px rgba(14, 165, 233, 0.35);
  transform: translateY(-1px);
}

.btn-action-secondary {
  background: var(--bg-card-alt);
  border: 1px solid var(--border-subtle);
  color: var(--text-main);
  border-radius: var(--radius-sm);
  padding: 0.65rem 1rem;
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  min-height: 40px;
  transition: all 0.2s ease;
}

.btn-action-secondary:hover {
  background: var(--bg-card-hover);
  border-color: var(--text-dim);
}

/* Tabla responsiva para Diario de Sesiones */
.table-scroll-container {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  margin-bottom: 1.5rem;
}

.diary-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
  min-width: 600px;
}

.diary-table th, .diary-table td {
  padding: 0.65rem 0.85rem;
  text-align: left;
  border-bottom: 1px solid var(--border-subtle);
}

.diary-table th {
  background: var(--bg-card-alt);
  font-weight: 700;
  color: var(--text-dim);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  position: sticky;
  top: 0;
}

.diary-table tr:hover {
  background: rgba(255, 255, 255, 0.02);
}

.diary-table .col-mono {
  font-family: var(--font-mono);
}

.diary-table .input-cell {
  width: 80px;
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  color: var(--text-main);
  border-radius: 4px;
  padding: 0.25rem 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

.diary-table .btn-delete-row {
  background: transparent;
  border: none;
  color: var(--pmc-atl);
  cursor: pointer;
  padding: 0.25rem;
  border-radius: 4px;
}

.diary-table .btn-delete-row:hover {
  background: rgba(244, 63, 94, 0.15);
}

/* Calculadora Rápida TSS en tarjeta */
.calc-subbox {
  background: var(--bg-card-alt);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  margin-bottom: 1.5rem;
}

.subbox-title {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 700;
  margin: 0 0 0.5rem;
  color: var(--text-main);
}

.subbox-desc {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin: 0 0 1rem;
}

/* Modales canónicos de confirmación */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(11, 15, 23, 0.8);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 1rem;
}

.modal-overlay[hidden] {
  display: none;
}

.modal-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  max-width: 500px;
  width: 100%;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.6);
  padding: 1.5rem;
  animation: modalEnter 0.2s ease-out;
}

@keyframes modalEnter {
  from { opacity: 0; transform: scale(0.96); }
  to { opacity: 1; transform: scale(1); }
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 0.75rem;
  margin-bottom: 1rem;
}

.modal-title {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 700;
  margin: 0;
}

.modal-close {
  background: transparent;
  border: none;
  color: var(--text-dim);
  cursor: pointer;
  padding: 0.25rem;
  border-radius: 4px;
}

.modal-close:hover {
  color: var(--text-main);
}

.modal-actions {
  display: flex;
  gap: 0.75rem;
  margin-top: 1.5rem;
  justify-content: flex-end;
}

/* Guía Educativa SEO Acordeón */
.seo-guide-section {
  margin-top: 2.5rem;
  border-top: 1px solid var(--border-subtle);
  padding-top: 2rem;
}

.seo-guide-title {
  font-family: var(--font-heading);
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.faq-question {
  padding: 1rem 1.25rem;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  user-select: none;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.faq-question::-webkit-details-marker {
  display: none;
}

.faq-question::after {
  content: '+';
  font-size: 1.2rem;
  font-weight: 400;
  color: var(--text-dim);
}

.faq-item[open] .faq-question::after {
  content: '−';
}

.faq-answer {
  padding: 0 1.25rem 1.25rem;
  color: var(--text-muted);
  font-size: 0.88rem;
  line-height: 1.6;
}

.faq-answer p {
  margin: 0 0 0.75rem;
}

.faq-answer p:last-child {
  margin-bottom: 0;
}