/**
 * Calculadora de ritmos y parciales de running - Zeltrika Pace Studio
 * Diseño deportivo profesional de alto rendimiento y telemetría atlética.
 * 100% CSS nativo sin dependencias externas ni fuentes descargadas.
 */

:root {
  /* Paleta oficial de marca Zeltrika */
  --color-primary-green: #101d25; /* Identidad actual compartida con Zeltrika */
  --color-primary-dark: #09131d;
  --color-primary-soft: #243b46;
  --color-primary-light: rgba(24, 58, 50, 0.08);
  --color-primary-glow: rgba(24, 58, 50, 0.15);
  
  --color-bg-light: #f5f4ef;      /* Lienzo compartido con la web principal */
  --color-bg-subtle: #E9EFEA;
  --color-sage: #b4f17d;          /* Acento actual de Zeltrika */
  --color-sage-subtle: #D8E3D7;
  --color-sage-light: #EEF4EE;
  
  --color-text-dark: #101d25;     /* Tipografía compartida con el blog */
  --color-text-muted: #53635c;
  --color-text-subtle: #798C84;
  --color-white: #FFFFFF;
  
  --color-border: #d8ddd5;
  --color-border-subtle: #E4ECE7;
  --color-border-active: #183A32;
  
  /* Estados de error y accesibilidad */
  --color-error: #B91C1C;
  --color-error-bg: #FEF2F2;
  --color-error-border: #F87171;
  --color-focus-ring: #183A32;
  
  /* Tipografía del sistema y figuras tabulares */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;

  /* Escala de elevación y radios */
  --radius-xs: 4px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --shadow-sm: 0 1px 2px rgba(24, 58, 50, 0.04);
  --shadow-card: 0 4px 16px rgba(24, 58, 50, 0.06), 0 1px 3px rgba(24, 58, 50, 0.04);
  --shadow-elevated: 0 10px 30px rgba(24, 58, 50, 0.08), 0 2px 6px rgba(24, 58, 50, 0.04);
  --container-max-width: 1140px;
}

/* Reset y caja */
[hidden] { display: none !important; }
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-family: var(--font-sans);
  background-color: var(--color-bg-light);
  color: var(--color-text-dark);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Enfoque accesible */
:focus-visible {
  outline: 3px solid var(--color-focus-ring);
  outline-offset: 2px;
}

.visually-hidden {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

.tabular-nums {
  font-variant-numeric: tabular-nums;
  font-family: var(--font-mono);
}

.font-semibold {
  font-weight: 600;
}

/* Cabecera superior atlética */
.site-header {
  background-color: var(--color-primary-green);
  color: var(--color-white);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  padding: 0.875rem 1.5rem;
}

.header-container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
}

.brand-block {
  display: flex;
  align-items: center;
  gap: 0.875rem;
  text-decoration: none;
  color: var(--color-white);
}

.brand-title {
  font-size: 1.375rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--color-white);
}

.brand-badge {
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-sage);
  background-color: rgba(255, 255, 255, 0.1);
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius-xs);
  border: 1px solid rgba(164, 184, 163, 0.3);
}

.header-nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}
.nav-more { position: relative; color: #c5d4cc; font-size: .875rem; }
.nav-more summary { cursor: pointer; padding: 12px 0; }
.nav-more > div { position: absolute; top: 100%; right: 0; min-width: 210px; background: #101d25; padding: 12px; border-radius: 8px; z-index: 50; box-shadow: 0 8px 24px #101d2520; }
.nav-more a { display: block; padding: 12px; }
@media(max-width:767px) { .header-nav { gap: 16px; flex-wrap: wrap; justify-content: center; } .header-container { flex-wrap: wrap; justify-content: center; } }

@media (min-width: 768px) {
  .header-nav {
    display: flex;
  }
}

.nav-link {
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  color: #C5D4CC;
  transition: color 0.15s ease;
}

.nav-link:hover {
  color: var(--color-white);
}

/* Contenedor principal */
.main-wrapper {
  flex: 1;
  max-width: var(--container-max-width);
  width: 100%;
  margin: 0 auto;
  padding: 2.25rem 1.25rem 4rem;
}

/* Sección Hero */
.hero-section {
  margin-bottom: 2rem;
}

.hero-meta-bar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-text-subtle);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 0.5rem;
}

.hero-title {
  font-size: 2.375rem;
  font-weight: 800;
  color: var(--color-primary-green);
  line-height: 1.15;
  letter-spacing: -0.035em;
  margin-bottom: 0.75rem;
}

@media (min-width: 768px) {
  .hero-title {
    font-size: 2.75rem;
  }
}

.hero-subtitle {
  font-size: 1.125rem;
  color: var(--color-text-muted);
  max-width: 820px;
  line-height: 1.55;
  margin-bottom: 1.25rem;
}

/* Aviso de límites del modelo */
.disclaimer-banner {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-sage);
  border-radius: var(--radius-sm);
  padding: 0.875rem 1.25rem;
  font-size: 0.875rem;
  color: var(--color-text-dark);
  line-height: 1.5;
  box-shadow: var(--shadow-sm);
}

/* Pista Visual de Carrera (Visual Race Track) */
.track-visual-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.25rem 1.5rem;
  margin-bottom: 2rem;
  box-shadow: var(--shadow-card);
}

.track-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 0.75rem;
}

.track-title {
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--color-primary-green);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.track-stats {
  display: flex;
  gap: 1.25rem;
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.track-stats strong {
  color: var(--color-primary-green);
  font-family: var(--font-mono);
}

.track-svg-wrapper {
  width: 100%;
  overflow-x: auto;
}

.track-svg {
  width: 100%;
  min-width: 600px;
  height: 90px;
  display: block;
}

/* Rejilla Principal de la Calculadora */
.calculator-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  margin-bottom: 2.5rem;
}

@media (min-width: 960px) {
  .calculator-grid {
    grid-template-columns: 1.05fr 0.95fr;
    align-items: start;
  }
}

/* Tarjeta de Aplicación */
.card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  padding: 1.75rem;
}

.card-title {
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--color-primary-green);
  letter-spacing: -0.025em;
  margin-bottom: 0.375rem;
}

.card-subtitle {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-bottom: 1.5rem;
  line-height: 1.45;
}

/* Selector de Modos (Tabs) */
.mode-tabs-wrapper {
  margin-bottom: 1.5rem;
}

.mode-tabs-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  background-color: var(--color-bg-light);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 0.3125rem;
  gap: 0.3125rem;
}

.tab-btn {
  background: transparent;
  border: none;
  padding: 0.75rem 0.625rem;
  font-family: inherit;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text-muted);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.15s cubic-bezier(0.16, 1, 0.3, 1);
  min-height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.tab-btn:hover {
  color: var(--color-primary-green);
}

.tab-btn.active,
.tab-btn[aria-selected="true"] {
  background-color: var(--color-white);
  color: var(--color-primary-green);
  box-shadow: var(--shadow-sm);
  font-weight: 700;
}

/* Paneles de Entrada */
.mode-panel {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.label-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
}

.form-label {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--color-text-dark);
}

.field-hint {
  font-size: 0.75rem;
  color: var(--color-text-subtle);
}

/* Input clusters con steppers */
.input-with-select {
  display: grid;
  grid-template-columns: 1fr 105px;
  gap: 0.5rem;
}

.form-input,
.form-select {
  width: 100%;
  padding: 0.6875rem 0.875rem;
  font-family: inherit;
  font-size: 1.0625rem;
  color: var(--color-text-dark);
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
  min-height: 48px;
}

.form-input:focus,
.form-select:focus {
  border-color: var(--color-primary-green);
  outline: none;
  box-shadow: 0 0 0 3px var(--color-primary-glow);
}

.form-input.input-error {
  border-color: var(--color-error);
  background-color: var(--color-error-bg);
}

.form-error-msg {
  font-size: 0.8125rem;
  color: var(--color-error);
  font-weight: 600;
  margin-top: 0.25rem;
}

/* Cluster de tiempo ergonómico con botones + / - */
.time-inputs-cluster {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.625rem;
}

.time-field-wrapper {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  text-align: center;
}

.stepper-control-row {
  display: flex;
  gap: 0.25rem;
  margin-top: 0.25rem;
}

.stepper-btn {
  flex: 1;
  background-color: var(--color-bg-light);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xs);
  padding: 0.25rem 0.375rem;
  font-size: 0.6875rem;
  font-weight: 600;
  color: var(--color-text-muted);
  cursor: pointer;
  transition: all 0.12s ease;
  min-height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.stepper-btn:hover {
  background-color: var(--color-white);
  border-color: var(--color-sage);
  color: var(--color-primary-green);
}

.time-sublabel {
  font-size: 0.75rem;
  color: var(--color-text-subtle);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

/* Cluster de ritmo */
.pace-inputs-cluster {
  display: grid;
  grid-template-columns: 1fr 1fr 115px;
  gap: 0.625rem;
}

/* Chips de distancia predefinida */
.preset-chips-wrapper {
  display: flex;
  flex-wrap: wrap;
  gap: 0.375rem;
  margin-top: 0.375rem;
}

.preset-btn {
  background-color: var(--color-bg-light);
  border: 1px solid var(--color-border);
  padding: 0.375rem 0.6875rem;
  font-family: inherit;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-text-dark);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.15s ease;
  min-height: 36px;
}

.preset-btn:hover {
  border-color: var(--color-sage);
  background-color: var(--color-white);
}

.preset-btn.active {
  background-color: var(--color-primary-green);
  color: var(--color-white);
  border-color: var(--color-primary-green);
}

/* Acciones del formulario */
.form-actions {
  display: flex;
  gap: 0.75rem;
  margin-top: 1rem;
}

.btn-primary {
  flex: 2;
  background-color: var(--color-primary-green);
  color: var(--color-white);
  border: none;
  padding: 0.8125rem 1.25rem;
  font-family: inherit;
  font-size: 1rem;
  font-weight: 700;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background-color 0.15s ease, transform 0.1s ease;
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.btn-primary:hover {
  background-color: var(--color-primary-dark);
}

.btn-primary:active {
  transform: scale(0.99);
}

.btn-secondary {
  flex: 1;
  background-color: var(--color-white);
  color: var(--color-text-dark);
  border: 1px solid var(--color-border);
  padding: 0.8125rem 1rem;
  font-family: inherit;
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.15s ease;
  min-height: 48px;
}

.btn-secondary:hover {
  background-color: var(--color-bg-light);
  border-color: var(--color-sage);
}

/* Tarjeta de Telemetría de Resultados */
.results-card {
  display: flex;
  flex-direction: column;
}

.results-empty-msg {
  padding: 3rem 1.5rem;
  text-align: center;
  color: var(--color-text-muted);
  font-size: 0.9375rem;
  background-color: var(--color-bg-light);
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-md);
}

.results-content {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

/* Banner de Métrica Primaria */
.primary-metric-banner {
  background: linear-gradient(135deg, #183A32 0%, #224d42 100%);
  color: var(--color-white);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: 0 6px 20px rgba(24, 58, 50, 0.18);
}

.primary-metric-banner::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, #A4B8A3, transparent);
}

.metric-caption {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-sage);
  margin-bottom: 0.375rem;
}

.metric-highlight {
  font-size: 2.75rem;
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.03em;
  font-family: var(--font-mono);
  color: var(--color-white);
}

.metric-secondary-unit {
  font-size: 1rem;
  font-weight: 500;
  margin-top: 0.5rem;
  color: #D3E0D8;
}

/* Rejilla de Métricas Secundarias */
.secondary-metrics-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}

.metric-tile {
  background-color: var(--color-bg-light);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-md);
  padding: 1rem;
  display: flex;
  flex-direction: column;
  transition: border-color 0.15s ease;
}

.metric-tile:hover {
  border-color: var(--color-border);
}

.tile-label {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 0.375rem;
}

.tile-value {
  font-size: 1.375rem;
  font-weight: 800;
  color: var(--color-text-dark);
  line-height: 1.15;
}

.tile-subvalue {
  font-size: 0.75rem;
  color: var(--color-text-subtle);
  margin-top: 0.25rem;
}

/* Botones de Utilidad */
.utility-actions-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.625rem;
  align-items: center;
  margin-top: 0.5rem;
}

.btn-utility {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  color: var(--color-text-dark);
  padding: 0.625rem 1rem;
  font-family: inherit;
  font-size: 0.8125rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.15s ease;
  min-height: 42px;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.btn-utility:hover {
  background-color: var(--color-bg-light);
  border-color: var(--color-primary-green);
  color: var(--color-primary-green);
}

.feedback-msg {
  font-size: 0.8125rem;
  color: var(--color-primary-green);
  font-weight: 700;
}

/* Matriz de Variación de Ritmo (Pace Sensitivity Matrix) */
.matrix-section {
  margin-top: 2.5rem;
}

.matrix-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
  min-width: 440px;
}

.matrix-table th {
  background-color: var(--color-bg-light);
  color: var(--color-text-muted);
  font-weight: 700;
  padding: 0.625rem 0.875rem;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.matrix-table td {
  padding: 0.625rem 0.875rem;
  border-bottom: 1px solid var(--color-border-subtle);
}

.row-matrix-base {
  background-color: var(--color-sage-light) !important;
  font-weight: 700;
}

.row-matrix-base td {
  color: var(--color-primary-green);
  border-top: 1.5px solid var(--color-sage);
  border-bottom: 1.5px solid var(--color-sage);
}

/* Pulsera de Ritmo Imprimible (Pace Band) */
.pace-band-section {
  margin-top: 2.5rem;
}

.pace-band-container {
  background-color: #FAFCFB;
  border: 1.5px dashed var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  margin-top: 1rem;
}

.pace-band-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.75rem;
}

.pace-band-strip {
  display: flex;
  overflow-x: auto;
  gap: 0.25rem;
  padding-bottom: 0.5rem;
}

.pace-band-item {
  flex: 0 0 auto;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xs);
  padding: 0.5rem 0.625rem;
  text-align: center;
  display: flex;
  flex-direction: column;
  min-width: 58px;
}

.pace-band-item .band-dist {
  font-size: 0.6875rem;
  font-weight: 700;
  color: var(--color-text-muted);
  text-transform: uppercase;
}

.pace-band-item .band-time {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--color-primary-green);
}

.pace-band-item.pace-band-finish {
  background-color: var(--color-primary-green);
  border-color: var(--color-primary-green);
}

.pace-band-item.pace-band-finish .band-dist {
  color: var(--color-sage);
}

.pace-band-item.pace-band-finish .band-time {
  color: var(--color-white);
}

/* Tabla de Parciales (Splits) */
.splits-section {
  margin-top: 2.5rem;
}

.splits-header-bar {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

@media (min-width: 768px) {
  .splits-header-bar {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
}

.splits-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 0.625rem;
  align-items: center;
}

.splits-custom-inputs {
  display: flex;
  gap: 0.375rem;
  align-items: center;
}

.table-wrapper {
  overflow-x: auto;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: var(--color-white);
  margin-bottom: 0.75rem;
}

.splits-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.875rem;
  min-width: 520px;
}

.splits-table th {
  background-color: var(--color-bg-light);
  color: var(--color-text-muted);
  font-weight: 700;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.splits-table td {
  padding: 0.625rem 1rem;
  border-bottom: 1px solid var(--color-border-subtle);
  color: var(--color-text-dark);
}

.splits-table tbody tr:nth-child(even) {
  background-color: #FAFCFB;
}

.splits-table tbody tr:hover {
  background-color: #F1F6F3;
}

.splits-table tr.row-finish {
  background-color: var(--color-sage-subtle) !important;
  font-weight: 700;
}

.splits-table tr.row-finish td {
  color: var(--color-primary-green);
  border-bottom: 2px solid var(--color-sage);
}

.splits-note {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  line-height: 1.5;
  margin-top: 0.625rem;
}

/* Conversor Rápido Auxiliar */
.converter-section {
  margin-top: 2.5rem;
}

.converter-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

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

@media (min-width: 960px) {
  .converter-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.converter-box {
  background-color: var(--color-bg-light);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.125rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.converter-box-title {
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--color-primary-green);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

/* Secciones Editoriales e Indexables */
.editorial-section {
  margin-top: 3rem;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2.25rem 1.75rem;
  box-shadow: var(--shadow-sm);
}

.editorial-section h2 {
  font-size: 1.625rem;
  font-weight: 800;
  color: var(--color-primary-green);
  letter-spacing: -0.025em;
  margin-bottom: 1rem;
}

.editorial-section h3 {
  font-size: 1.1875rem;
  font-weight: 700;
  color: var(--color-text-dark);
  margin: 1.5rem 0 0.5rem;
}

.editorial-section p,
.editorial-section li {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.65;
  margin-bottom: 0.75rem;
}

.editorial-section ul {
  padding-left: 1.5rem;
  margin-bottom: 1rem;
}

.math-formula-box {
  background-color: var(--color-bg-light);
  border-left: 4px solid var(--color-primary-green);
  border-radius: var(--radius-sm);
  padding: 1.125rem 1.25rem;
  margin: 1rem 0;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--color-text-dark);
  line-height: 1.75;
}

.example-callout {
  background-color: #F6F9F7;
  border: 1px solid var(--color-sage-subtle);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  margin: 1.5rem 0;
}

/* FAQ */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  margin-top: 1.25rem;
}

.faq-item {
  border-bottom: 1px solid var(--color-border-subtle);
  padding-bottom: 1.25rem;
}

.faq-question {
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--color-primary-green);
  margin-bottom: 0.375rem;
}

.faq-answer {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* Pie de Página */
.site-footer {
  background-color: var(--color-primary-green);
  color: #D3E0D9;
  padding: 2.75rem 1.5rem;
  margin-top: auto;
  font-size: 0.875rem;
}

.footer-container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.footer-top {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

@media (min-width: 640px) {
  .footer-top {
    flex-direction: row;
    justify-content: space-between;
    align-items: baseline;
  }
}

.footer-brand {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--color-white);
  letter-spacing: -0.02em;
}

.footer-disclaimer {
  font-size: 0.8125rem;
  color: var(--color-sage);
  line-height: 1.5;
  max-width: 820px;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  padding-top: 1.25rem;
  font-size: 0.75rem;
  color: #A8BBB1;
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* Adaptabilidad a 320px */
@media (max-width: 380px) {
  .hero-title {
    font-size: 1.75rem;
  }
  .card {
    padding: 1.125rem;
  }
  .mode-tabs-list {
    grid-template-columns: 1fr;
  }
  .input-with-select {
    grid-template-columns: 1fr;
  }
  .time-inputs-cluster,
  .pace-inputs-cluster {
    grid-template-columns: 1fr;
  }
  .secondary-metrics-grid {
    grid-template-columns: 1fr;
  }
}

/* Estilos de Impresión (Específico para Pulsera de Carrera y Parciales) */
@media print {
  body {
    background: white !important;
    color: black !important;
  }
  .site-header,
  .hero-section,
  .track-visual-card,
  #running-calculator-app,
  .utility-actions-row,
  .converter-section,
  .editorial-section,
  .site-footer,
  .splits-controls,
  #btn-print-pace-band {
    display: none !important;
  }
  .card, .table-wrapper, .pace-band-container {
    box-shadow: none !important;
    border: 1px solid #999 !important;
  }
  .pace-band-strip {
    display: flex !important;
    flex-wrap: wrap !important;
  }
  .pace-band-item {
    border: 1px solid #333 !important;
  }
}