/* ==========================================================================
   Test Course-Navette (Léger 20m) interactivo - Fijate Tools
   ========================================================================== */

:root,
[data-theme="dark"],
body.dark-mode {
  --font-main: 'Inter', system-ui, -apple-system, sans-serif;
  --font-heading: 'Outfit', 'Inter', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Variables corporativas fijate.com (compatibilidad canónica con header.css, ads.css y footer.css) */
  --bg-page: #0b0f17;
  --bg-card: #111827;
  --bg-surface: #111827;
  --bg-input: #1f293d;
  --border-color: #1e293b;
  --border-subtle: #1e293b;

  /* Paleta cromática modo oscuro (predeterminado oficial) */
  --card-bg: #111827;
  --card-border: #1e293b;
  --card-border-focus: #3b82f6;
  --card-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
  --card-shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.55);

  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-subtle: #8494ab;

  --surface-muted: #0b0f17;
  --surface-alt: #162032;

  /* Colores temáticos atléticos y de seguridad */
  --navette-blue-primary: #3b82f6;
  --navette-blue-hover: #60a5fa;
  --navette-blue-light: rgba(59, 130, 246, 0.18);
  --navette-blue-glow: rgba(59, 130, 246, 0.35);

  --track-bg: #131d2e;
  --track-lane: #0b1322;
  --track-tartan: #991b1b;
  --track-tartan-light: #ef4444;
  --track-line: #f8fafc;

  --accent-gold: #f59e0b;
  --accent-gold-bg: rgba(245, 158, 11, 0.15);
  --accent-emerald: #10b981;
  --accent-emerald-bg: rgba(16, 185, 129, 0.15);
  --accent-crimson: #ef4444;
  --accent-crimson-bg: rgba(239, 68, 68, 0.15);

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-full: 9999px;

  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s ease;
}

/* Modo claro canónico */
[data-theme="light"],
body.light-mode,
body.light-theme {
  /* Variables corporativas fijate.com */
  --bg-page: #f8fafc;
  --bg-card: #ffffff;
  --bg-surface: #ffffff;
  --bg-input: #ffffff;
  --border-color: #e2e8f0;
  --border-subtle: #e2e8f0;

  /* Paleta cromática modo claro */
  --card-bg: #ffffff;
  --card-border: #e2e8f0;
  --card-border-focus: #2563eb;
  --card-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
  --card-shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);

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

  --surface-muted: #f8fafc;
  --surface-alt: #f1f5f9;

  --navette-blue-primary: #2563eb;
  --navette-blue-hover: #1d4ed8;
  --navette-blue-light: #eff6ff;
  --navette-blue-glow: rgba(37, 99, 235, 0.25);

  --track-bg: #1e293b;
  --track-lane: #0f172a;

  --accent-gold-bg: rgba(245, 158, 11, 0.12);
  --accent-emerald-bg: rgba(16, 185, 129, 0.12);
  --accent-crimson-bg: rgba(239, 68, 68, 0.12);
}


/* Base y contención */
* {
  box-sizing: border-box;
}

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

h1, h2, h3, h4, h5, h6,
.brand-title,
.section-title,
.hero-title,
.display-number {
  font-family: var(--font-heading);
}

.mono,
.timer-val,
.beep-counter,
code {
  font-family: var(--font-mono);
}

/* Layout AdSense seguro */
.tool-layout {
  max-width: 1240px;
  margin: 1rem auto 3rem;
  padding: 0 1rem;
  width: 100%;
  box-sizing: border-box;
  flex: 1 0 auto;
}

@media (min-width: 1536px) {
  .tool-with-sidebar {
    display: flex;
    gap: 2rem;
    align-items: flex-start;
  }

  .tool-main-content {
    flex: 1 1 0%;
    min-width: 0;
  }

  .tool-ad-sidebar {
    width: 300px;
    flex-shrink: 0;
  }
}

/* Tarjeta principal contenedora */
.card-main {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--card-shadow);
  padding: 1.5rem;
  margin-bottom: 2rem;
  width: 100%;
  max-width: 100%;
  min-width: 0;
}

@media (max-width: 640px) {
  .card-main {
    padding: 1rem;
    border-radius: var(--radius-md);
  }
}

/* Cabecera de la herramienta */
.tool-header-block {
  margin-bottom: 1.5rem;
  border-bottom: 1px solid var(--card-border);
  padding-bottom: 1.25rem;
}

.badge-official {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: var(--navette-blue-light);
  color: var(--navette-blue-primary);
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.3rem 0.75rem;
  border-radius: var(--radius-full);
  margin-bottom: 0.6rem;
}

.badge-official svg {
  flex-shrink: 0;
}

.tool-headline {
  font-size: 1.75rem;
  font-weight: 800;
  line-height: 1.2;
  margin: 0 0 0.5rem;
  color: var(--text-main);
}

@media (max-width: 640px) {
  .tool-headline {
    font-size: 1.35rem;
  }
}

.tool-lead {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.5;
  margin: 0;
  max-width: 820px;
}

/* Navegación por pestañas */
.nav-tabs-wrapper {
  width: 100%;
  max-width: 100%;
  min-width: 0;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  margin-bottom: 1.5rem;
  border-bottom: 1px solid var(--card-border);
  padding-bottom: 0.25rem;
}

.nav-tabs-wrapper::-webkit-scrollbar {
  display: none;
}

.nav-tabs {
  display: flex;
  gap: 0.5rem;
  min-width: max-content;
  padding: 0.25rem 0;
}

.tab-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-muted);
  font-family: var(--font-heading);
  font-size: 0.9rem;
  font-weight: 600;
  padding: 0.6rem 1rem;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

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

.tab-btn.active {
  background: var(--navette-blue-primary);
  color: #ffffff;
  box-shadow: 0 2px 8px var(--navette-blue-glow);
}

.tab-btn svg {
  flex-shrink: 0;
}

/* Configuración del atleta y oposición */
.config-bar-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  background: var(--surface-alt);
  padding: 1.2rem;
  border-radius: var(--radius-md);
  margin-bottom: 1.75rem;
  border: 1px solid var(--card-border);
}

@media (max-width: 860px) {
  .config-bar-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 0.85rem;
    padding: 1rem;
  }
}

.config-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  min-width: 0;
}

.config-label {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.config-select,
.config-input {
  width: 100%;
  max-width: 100%;
  min-width: 0;
  height: 42px;
  padding: 0 0.85rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--card-border);
  background: var(--card-bg);
  color: var(--text-main);
  font-family: var(--font-main);
  font-size: 0.9rem;
  font-weight: 500;
  outline: none;
  transition: border-color var(--transition-fast);
}

.config-select {
  text-overflow: ellipsis;
  white-space: nowrap;
  overflow: hidden;
  padding-right: 40px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2364748b' stroke-width='2.2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  appearance: none;
  -webkit-appearance: none;
}

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

.config-select:focus,
.config-input:focus {
  border-color: var(--card-border-focus);
}

/* Selector Hombre/Mujer en 2 columnas */
.gender-switch-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.4rem;
  height: 42px;
}

.gender-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  font-family: var(--font-heading);
  font-size: 0.86rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  padding: 0 0.5rem;
}

.gender-btn:hover {
  background: var(--surface-muted);
  color: var(--text-main);
}

.gender-btn.active {
  background: var(--navette-blue-primary);
  border-color: var(--navette-blue-primary);
  color: #ffffff;
}

/* Banner reactivo de objetivos por género y oposición */
.target-summary-banner {
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.08) 0%, rgba(15, 23, 42, 0.03) 100%);
  border: 1px solid rgba(37, 99, 235, 0.25);
  border-left: 4px solid var(--navette-blue-primary);
  border-radius: var(--radius-md);
  padding: 1rem 1.25rem;
  margin-bottom: 1.75rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  transition: all var(--transition-fast);
}

body.dark-mode .target-summary-banner {
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.15) 0%, rgba(15, 23, 42, 0.6) 100%);
  border-color: rgba(59, 130, 246, 0.35);
}

.target-summary-icon {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--navette-blue-light);
  color: var(--navette-blue-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.target-summary-content {
  flex: 1 1 0%;
  min-width: 0;
}

.target-summary-head {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 0.45rem;
  flex-wrap: wrap;
}

.target-summary-title {
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-main);
}

.target-gender-badge {
  font-size: 0.74rem;
  font-weight: 700;
  text-transform: uppercase;
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-full);
  background: var(--navette-blue-primary);
  color: #ffffff;
  letter-spacing: 0.04em;
}

.target-summary-tags {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.target-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-sm);
  background: var(--surface-alt);
  color: var(--text-muted);
}

.target-tag strong {
  font-family: var(--font-mono);
  color: var(--text-main);
}

.target-tag.elim {
  background: var(--accent-crimson-bg);
  color: var(--accent-crimson);
}

.target-tag.pass {
  background: var(--accent-gold-bg);
  color: var(--accent-gold);
}

.target-tag.top {
  background: var(--accent-emerald-bg);
  color: var(--accent-emerald);
}

/* Pastilla de objetivo en el marcador en vivo */
.arena-status-group {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.arena-milestone-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: rgba(37, 99, 235, 0.25);
  border: 1px solid rgba(59, 130, 246, 0.4);
  color: #93c5fd;
  font-size: 0.82rem;
  font-weight: 700;
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-full);
}

.arena-milestone-pill svg {
  color: #38bdf8;
  flex-shrink: 0;
}

/* Filas reactivas de baremos oficiales */
.scale-list {
  list-style: none;
  padding: 0;
  margin: 0.6rem 0 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.scale-row {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  padding: 0.6rem 0.85rem;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  background: var(--card-bg);
  transition: all var(--transition-fast);
  font-size: 0.9rem;
}

.scale-row.is-active {
  border-color: var(--navette-blue-primary);
  background: var(--navette-blue-light);
  box-shadow: 0 0 0 1px var(--navette-blue-primary);
}

body.dark-mode .scale-row.is-active {
  background: rgba(37, 99, 235, 0.18);
}

.scale-label-gender {
  font-weight: 700;
  color: var(--text-main);
  white-space: nowrap;
}

.scale-row.is-active .scale-label-gender {
  color: var(--navette-blue-primary);
}

.scale-text {
  color: var(--text-muted);
  line-height: 1.45;
}

/* ==========================================================================
   Marcador interactivo digital (Arena del Test)
   ========================================================================== */
.digital-arena-card {
  background: linear-gradient(145deg, #0b1329 0%, #080d1a 100%);
  color: #f8fafc;
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  margin-bottom: 2rem;
  box-shadow: 0 16px 32px rgba(2, 6, 23, 0.45), inset 0 1px 1px rgba(255, 255, 255, 0.1);
  border: 1px solid #1e293b;
  position: relative;
  overflow: hidden;
}

@media (max-width: 640px) {
  .digital-arena-card {
    padding: 1.2rem;
  }
}

/* Barra superior del marcador: Estado, faltas y audio */
.arena-top-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}

.arena-status-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 0.85rem;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.08);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.status-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: #94a3b8;
  display: inline-block;
  box-shadow: 0 0 8px currentColor;
}

.status-dot.active {
  background: #10b981;
  animation: pulse-dot 1.4s infinite;
}

.status-dot.warning {
  background: #f59e0b;
  animation: pulse-dot 0.8s infinite;
}

.status-dot.stopped {
  background: #ef4444;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(1.25); }
}

.arena-audio-quick {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.btn-sound-test {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: #f1f5f9;
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.35rem 0.7rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-sound-test:hover {
  background: rgba(255, 255, 255, 0.2);
}

/* Pantalla principal de cifras */
.arena-scoreboard-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

@media (max-width: 900px) {
  .arena-scoreboard-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 480px) {
  .arena-scoreboard-grid {
    grid-template-columns: minmax(0, 1fr);
  }
}

.score-box {
  background: rgba(15, 23, 42, 0.75);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  padding: 1rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-width: 0;
}

.score-box-primary {
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.25) 0%, rgba(15, 23, 42, 0.8) 100%);
  border-color: rgba(59, 130, 246, 0.4);
}

.score-label {
  font-size: 0.75rem;
  font-weight: 700;
  color: #94a3b8;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.35rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.score-val-big {
  font-family: var(--font-heading);
  font-size: 3rem;
  font-weight: 800;
  line-height: 1;
  color: #ffffff;
  letter-spacing: -0.02em;
}

@media (max-width: 640px) {
  .score-val-big {
    font-size: 2.3rem;
  }
}

.score-subline {
  font-size: 0.82rem;
  color: #cbd5e1;
  margin-top: 0.4rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.score-pill-speed {
  background: rgba(37, 99, 235, 0.4);
  color: #93c5fd;
  padding: 0.15rem 0.45rem;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-family: var(--font-mono);
  font-size: 0.78rem;
}

.score-val-timer {
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 700;
  color: #38bdf8;
  line-height: 1.1;
}

.score-val-meters {
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 700;
  color: #34d399;
  line-height: 1.1;
}

.score-val-shuttles {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 700;
  color: #f59e0b;
  line-height: 1.1;
}

/* ==========================================================================
   Pista interactiva animada de 20 metros
   ========================================================================== */
.track-simulator-container {
  background: var(--track-bg);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
  padding: 1rem 1.25rem;
  margin-bottom: 1.5rem;
  position: relative;
}

.track-indicators-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.75rem;
  color: #94a3b8;
  font-weight: 700;
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}

.track-lane-view {
  height: 52px;
  background: linear-gradient(90deg, #991b1b 0%, #b91c1c 50%, #991b1b 100%);
  border-radius: var(--radius-sm);
  position: relative;
  overflow: hidden;
  box-shadow: inset 0 3px 6px rgba(0, 0, 0, 0.5);
  border: 2px solid #7f1d1d;
}

/* Líneas de viraje reglamentarias de 20m */
.line-a,
.line-b {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 6px;
  background: #ffffff;
  box-shadow: 0 0 10px rgba(255, 255, 255, 0.8);
  z-index: 2;
}

.line-a {
  left: 12px;
}

.line-b {
  right: 12px;
}

.line-a.pulse-hit,
.line-b.pulse-hit {
  background: #38bdf8;
  box-shadow: 0 0 20px #38bdf8, 0 0 40px #38bdf8;
}

/* Marcas métricas intermedias (5m, 10m, 15m) */
.track-marker {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 1px;
  background: rgba(255, 255, 255, 0.25);
  z-index: 1;
}

.track-marker.m5 { left: 25%; }
.track-marker.m10 { left: 50%; border-right: 1px dashed rgba(255, 255, 255, 0.4); }
.track-marker.m15 { left: 75%; }

/* Corredor avatar animado */
.runner-avatar {
  position: absolute;
  top: 50%;
  left: 12px;
  transform: translateY(-50%) translateX(0);
  width: 34px;
  height: 34px;
  background: #2563eb;
  border: 2px solid #ffffff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  z-index: 5;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
  transition: transform 0.05s linear;
}

.runner-avatar svg {
  width: 18px;
  height: 18px;
}

.runner-avatar.flipped {
  transform: translateY(-50%) scaleX(-1);
}

/* Barra de progreso de la recta actual */
.shuttle-progress-track {
  width: 100%;
  height: 6px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-full);
  margin-top: 0.75rem;
  overflow: hidden;
}

.shuttle-progress-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, #38bdf8, #3b82f6);
  border-radius: var(--radius-full);
  transition: width 0.08s linear;
}

/* Barra de progreso del palier entero (1 min) */
.palier-progress-meta {
  display: flex;
  justify-content: space-between;
  font-size: 0.72rem;
  color: #94a3b8;
  margin-top: 0.4rem;
}

/* ==========================================================================
   Botonera de control de carrera
   ========================================================================== */
.arena-controls-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 0.75rem;
}

@media (max-width: 680px) {
  .arena-controls-grid {
    grid-template-columns: minmax(0, 1fr);
  }
}

.btn-ctrl {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 700;
  padding: 0.85rem 1.25rem;
  border-radius: var(--radius-md);
  cursor: pointer;
  border: none;
  transition: all var(--transition-normal);
  min-height: 48px;
  width: 100%;
  box-sizing: border-box;
}

.btn-ctrl svg {
  flex-shrink: 0;
}

.btn-ctrl-start {
  background: #10b981;
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(16, 185, 129, 0.4);
}

.btn-ctrl-start:hover {
  background: #059669;
  transform: translateY(-1px);
}

.btn-ctrl-pause {
  background: #3b82f6;
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(59, 130, 246, 0.4);
}

.btn-ctrl-pause:hover {
  background: #2563eb;
}

.btn-ctrl-fault {
  background: rgba(245, 158, 11, 0.15);
  border: 1px solid #f59e0b;
  color: #fbbf24;
}

.btn-ctrl-fault:hover {
  background: #f59e0b;
  color: #0f172a;
}

.btn-ctrl-stop {
  background: rgba(239, 68, 68, 0.15);
  border: 1px solid #ef4444;
  color: #f87171;
}

.btn-ctrl-stop:hover {
  background: #ef4444;
  color: #ffffff;
}

.btn-ctrl:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  transform: none !important;
  box-shadow: none !important;
}

/* ==========================================================================
   Panel de Resultados Fisiológicos y Oposición
   ========================================================================== */
.results-board-container {
  display: none;
  margin-top: 2rem;
  animation: fadeIn 0.4s ease;
}

.results-board-container.visible {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.results-hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

@media (max-width: 860px) {
  .results-hero-grid {
    grid-template-columns: minmax(0, 1fr);
  }
}

.result-kpi-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  box-shadow: var(--card-shadow);
  position: relative;
  overflow: hidden;
  min-width: 0;
}

.result-kpi-card.score-card {
  border-left: 4px solid var(--navette-blue-primary);
  background: linear-gradient(to right, var(--navette-blue-light), var(--card-bg) 60%);
}

.result-kpi-card.vo2-card {
  border-left: 4px solid var(--accent-emerald);
}

.result-kpi-card.vam-card {
  border-left: 4px solid var(--accent-gold);
}

.kpi-title {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-bottom: 0.4rem;
}

.kpi-main-number {
  font-family: var(--font-heading);
  font-size: 2.5rem;
  font-weight: 800;
  line-height: 1.1;
  color: var(--text-main);
  margin-bottom: 0.3rem;
}

.kpi-badge-status {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-full);
  font-size: 0.78rem;
  font-weight: 700;
}

.kpi-badge-status.pass {
  background: var(--accent-emerald-bg);
  color: var(--accent-emerald);
}

.kpi-badge-status.warn {
  background: var(--accent-gold-bg);
  color: var(--accent-gold);
}

.kpi-badge-status.fail {
  background: var(--accent-crimson-bg);
  color: var(--accent-crimson);
}

/* Desglose de métricas detalladas */
.metrics-breakdown-table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 1.5rem;
  font-size: 0.9rem;
}

.metrics-breakdown-table th,
.metrics-breakdown-table td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--card-border);
  text-align: left;
}

.metrics-breakdown-table th {
  background: var(--surface-alt);
  font-family: var(--font-heading);
  font-weight: 700;
  color: var(--text-muted);
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.metrics-breakdown-table td {
  color: var(--text-main);
}

.metrics-breakdown-table td.val-col {
  text-align: right;
  font-family: var(--font-mono);
  font-weight: 700;
}

/* Botones de acción del informe */
.results-actions-bar {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-bottom: 2rem;
}

@media (max-width: 640px) {
  .results-actions-bar {
    flex-direction: column;
  }
}

.btn-action-res {
  flex: 1 1 0%;
  min-width: 180px;
  height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: var(--font-heading);
  font-size: 0.92rem;
  font-weight: 700;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  border: 1px solid var(--card-border);
  background: var(--card-bg);
  color: var(--text-main);
  box-sizing: border-box;
}

.btn-action-res:hover {
  background: var(--surface-alt);
  border-color: var(--card-border-focus);
}

.btn-action-res.primary {
  background: var(--navette-blue-primary);
  border-color: var(--navette-blue-primary);
  color: #ffffff;
}

.btn-action-res.primary:hover {
  background: var(--navette-blue-hover);
}

/* ==========================================================================
   Modo Calculadora Rápida Manual
   ========================================================================== */
.manual-calc-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.25rem;
  background: var(--surface-alt);
  padding: 1.5rem;
  border-radius: var(--radius-md);
  margin-bottom: 1.5rem;
  border: 1px solid var(--card-border);
}

@media (max-width: 640px) {
  .manual-calc-grid {
    grid-template-columns: minmax(0, 1fr);
  }
}

/* ==========================================================================
   Tablas de Periodos y Baremos Oficiales
   ========================================================================== */
.table-responsive-wrapper {
  width: 100%;
  max-width: 100%;
  min-width: 0;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  margin-bottom: 1.5rem;
}

.paliers-table {
  width: 100%;
  min-width: 620px;
  border-collapse: collapse;
  font-size: 0.88rem;
}

.paliers-table th,
.paliers-table td {
  padding: 0.75rem 0.85rem;
  border-bottom: 1px solid var(--card-border);
  text-align: center;
  color: var(--text-main);
}

.paliers-table th {
  background: var(--surface-alt);
  font-family: var(--font-heading);
  font-weight: 700;
  color: var(--text-muted);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.paliers-table tr:hover {
  background: var(--surface-alt);
}

.paliers-table td.palier-col {
  font-weight: 800;
  font-family: var(--font-mono);
  color: var(--navette-blue-primary);
}

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

.table-scroll-hint {
  display: none;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.76rem;
  color: var(--text-subtle);
  margin-top: 0.4rem;
  margin-bottom: 1rem;
}

@media (max-width: 768px) {
  .table-scroll-hint {
    display: inline-flex;
  }
}

/* ==========================================================================
   Sección Guía Didáctica y SEO
   ========================================================================== */
.guide-accordion-section {
  margin-top: 2rem;
  border-top: 1px solid var(--card-border);
  padding-top: 2rem;
}

.guide-title {
  font-size: 1.4rem;
  font-weight: 800;
  margin: 0 0 1rem;
  color: var(--text-main);
}

.guide-card {
  background: var(--surface-alt);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  margin-bottom: 1rem;
}

.guide-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin: 0 0 0.5rem;
  color: var(--text-main);
}

.guide-card p,
.guide-card li {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.guide-card ul {
  padding-left: 1.25rem;
  margin: 0.5rem 0;
}

.formula-clean-box {
  background: var(--card-bg);
  border-left: 3px solid var(--navette-blue-primary);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 0.75rem 1rem;
  margin: 0.75rem 0;
  font-family: var(--font-mono);
  font-size: 0.88rem;
  color: var(--text-main);
}

/* ==========================================================================
   Modales Canónicos HTML/CSS
   ========================================================================== */
.modal-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(15, 23, 42, 0.7);
  backdrop-filter: blur(4px);
  z-index: 9999;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  box-sizing: border-box;
}

.modal-overlay.active {
  display: flex;
}

.modal-window {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  max-width: 520px;
  width: 100%;
  box-shadow: var(--card-shadow-lg);
  overflow: hidden;
  animation: modalScale 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes modalScale {
  from { opacity: 0; transform: scale(0.95); }
  to { opacity: 1; transform: scale(1); }
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--card-border);
}

.modal-title {
  font-size: 1.15rem;
  font-weight: 700;
  margin: 0;
  color: var(--text-main);
}

.btn-modal-close {
  background: transparent;
  border: none;
  cursor: pointer;
  color: var(--text-muted);
  padding: 0.3rem;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
}

.btn-modal-close:hover {
  background: var(--surface-alt);
  color: var(--text-main);
}

.modal-body {
  padding: 1.5rem;
  font-size: 0.95rem;
  line-height: 1.5;
  color: var(--text-muted);
}

.modal-footer {
  padding: 1rem 1.5rem;
  background: var(--surface-alt);
  display: flex;
  justify-content: flex-end;
  gap: 0.75rem;
}

/* ==========================================================================
   Hoja de Estilos de Impresión (@media print)
   ========================================================================== */
@media print {
  .app-header,
  .fijate-footer,
  .tool-ad-sidebar,
  .tools-ad-banner-section,
  .nav-tabs-wrapper,
  .arena-controls-grid,
  .arena-audio-quick,
  .amazon-affiliate-showcase,
  .guide-accordion-section,
  .results-actions-bar,
  .btn-sound-test {
    display: none !important;
  }

  body {
    background: #ffffff !important;
    color: #000000 !important;
  }

  .tool-layout {
    margin: 0 !important;
    padding: 0 !important;
    max-width: 100% !important;
  }

  .card-main {
    border: none !important;
    box-shadow: none !important;
    padding: 0 !important;
  }

  .results-board-container {
    display: block !important;
  }

  .digital-arena-card {
    background: #f8fafc !important;
    color: #000000 !important;
    border: 1px solid #cbd5e1 !important;
    box-shadow: none !important;
  }

  .score-val-big,
  .score-val-timer,
  .score-val-meters {
    color: #000000 !important;
  }

  .print-watermark {
    display: block !important;
    text-align: center;
    font-size: 0.8rem;
    color: #64748b;
    margin-top: 2rem;
  }
}

.print-watermark {
  display: none;
}