/* =========================================================
   SISTEMA DE DISEÑO
   Colores, tipografías y espaciados centralizados en variables
   para no repetir valores por toda la hoja de estilos.
========================================================= */
:root {
  --c-asphalt: #0b0e11;
  --c-carbon: #14171c;
  --c-panel: #191d23;
  --c-track: #262b32;
  --c-white: #f3f1ea;
  --c-muted: #9aa0aa;
  --c-red: #e10600;
  --c-red-dark: #a30400;
  --c-gold: #d4af37;

  --font-display: "Titillium Web", sans-serif;
  --font-body: "Inter", sans-serif;
  --font-mono: "Space Mono", monospace;

  --max-width: 1120px;
  --radius: 10px;
}

/* =========================================================
   RESET BÁSICO
========================================================= */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  background: var(--c-asphalt);
  color: var(--c-white);
  font-family: var(--font-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  max-width: 100%;
  display: block;
}

/* Respeta a quienes prefieren menos animación */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
  }
}

/* Foco visible para navegación con teclado */
a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--c-gold);
  outline-offset: 3px;
}

/* =========================================================
   NAVBAR
========================================================= */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(11, 14, 17, 0.85);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--c-track);
}

.navbar__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.navbar__logo {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.3rem;
  letter-spacing: 0.03em;
  display: flex;
  align-items: center;
  gap: 8px;
}

.navbar__logo-sub {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--c-muted);
  letter-spacing: 0.15em;
}

/* Cuadradito a modo de bandera a cuadros junto al logo */
.navbar__flag {
  width: 16px;
  height: 16px;
  background: repeating-conic-gradient(var(--c-white) 0% 25%, var(--c-asphalt) 0% 50%) 0 0/8px 8px;
  border-radius: 2px;
}

.navbar__links {
  display: flex;
  gap: 28px;
  font-size: 0.9rem;
  font-weight: 500;
}

.navbar__links a {
  position: relative;
  padding: 4px 0;
  color: var(--c-white);
  opacity: 0.85;
  transition: opacity 0.2s ease;
}

.navbar__links a:hover {
  opacity: 1;
}

.navbar__links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 0%;
  height: 2px;
  background: var(--c-red);
  transition: width 0.25s ease;
}

.navbar__links a:hover::after {
  width: 100%;
}

.navbar__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
}

.navbar__toggle span {
  width: 22px;
  height: 2px;
  background: var(--c-white);
}

/* =========================================================
   HERO + LUCES DE LARGADA (elemento distintivo de la página)
========================================================= */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 120px 24px 60px;
  position: relative;
  overflow: hidden;
}

/* Textura sutil de asfalto */
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 20%, rgba(225, 6, 0, 0.08), transparent 40%),
    radial-gradient(circle at 80% 70%, rgba(212, 175, 55, 0.06), transparent 45%);
  pointer-events: none;
}

.hero__lights {
  display: flex;
  gap: 18px;
  margin-bottom: 48px;
  padding: 14px 22px;
  background: var(--c-carbon);
  border: 1px solid var(--c-track);
  border-radius: var(--radius);
}

.light {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: #3a1010;
  box-shadow: inset 0 0 4px rgba(0, 0, 0, 0.6);
  transition: background 0.15s ease, box-shadow 0.15s ease;
}

/* Estado "encendido": lo activa script.js añadiendo esta clase */
.light.is-on {
  background: var(--c-red);
  box-shadow: 0 0 16px 4px rgba(225, 6, 0, 0.75);
}

.hero__eyebrow {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--c-gold);
  margin-bottom: 18px;
}

.hero__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.6rem, 7vw, 5rem);
  line-height: 1.05;
  letter-spacing: -0.01em;
  margin-bottom: 24px;
}

.hero__subtitle {
  max-width: 560px;
  color: var(--c-muted);
  font-size: 1.05rem;
  margin-bottom: 36px;
}

.hero__cta {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  border: 1px solid var(--c-track);
  padding: 12px 22px;
  border-radius: 999px;
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.hero__cta:hover {
  border-color: var(--c-red);
  transform: translateY(-2px);
}

/* =========================================================
   SECCIONES GENERALES
========================================================= */
.section {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 100px 24px;
}

.section--alt {
  max-width: none;
  background: var(--c-carbon);
  border-top: 1px solid var(--c-track);
  border-bottom: 1px solid var(--c-track);
}

.section--alt > * {
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
}

.section__head {
  max-width: 640px;
  margin-bottom: 56px;
}

.section__eyebrow {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-red);
  margin-bottom: 12px;
}

.section__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  margin-bottom: 16px;
}

.section__lead {
  color: var(--c-muted);
}

/* =========================================================
   LÍNEA DE TIEMPO (Historia)
   Uso <ol> porque el orden cronológico es información real,
   no una simple decoración de números.
========================================================= */
.timeline {
  position: relative;
  list-style: none;
  border-left: 2px solid var(--c-track);
  padding-left: 36px;
}

.timeline__item {
  position: relative;
  padding-bottom: 44px;
}

.timeline__item:last-child {
  padding-bottom: 0;
}

.timeline__item::before {
  content: "";
  position: absolute;
  left: -42px;
  top: 4px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--c-asphalt);
  border: 2px solid var(--c-red);
}

.timeline__year {
  display: inline-block;
  font-family: var(--font-mono);
  color: var(--c-gold);
  font-size: 0.85rem;
  margin-bottom: 6px;
}

.timeline__body h3 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  margin-bottom: 8px;
}

.timeline__body p {
  color: var(--c-muted);
  max-width: 620px;
}

/* Estado inicial/final para la animación de aparición al hacer scroll */
.timeline__item {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.timeline__item.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* =========================================================
   TARJETAS DE ESCUDERÍAS
========================================================= */
.teams {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}

.team-card {
  background: var(--c-panel);
  border: 1px solid var(--c-track);
  border-radius: var(--radius);
  padding: 24px;
  position: relative;
  overflow: hidden;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.team-card:hover {
  transform: translateY(-4px);
  border-color: var(--team-color);
}

.team-card__bar {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--team-color);
}

.team-card__name {
  font-family: var(--font-display);
  font-size: 1.15rem;
  margin: 10px 0 4px;
}

.team-card__meta {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--c-muted);
  margin-bottom: 14px;
}

.team-card__desc {
  color: var(--c-muted);
  font-size: 0.92rem;
  margin-bottom: 20px;
}

.team-card__stats {
  display: flex;
  gap: 24px;
  border-top: 1px solid var(--c-track);
  padding-top: 14px;
}

.team-card__stats strong {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.4rem;
  color: var(--team-color);
}

.team-card__stats span {
  font-size: 0.72rem;
  color: var(--c-muted);
}

/* =========================================================
   TARJETAS DE PILOTOS / TABLERO DE TIEMPOS
========================================================= */
.drivers {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}

.driver-card {
  background: linear-gradient(180deg, var(--c-panel), var(--c-carbon));
  border: 1px solid var(--c-track);
  border-radius: var(--radius);
  padding: 28px;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.driver-card__head {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 16px;
}

.driver-card__number {
  font-family: var(--font-mono);
  font-size: 1.6rem;
  color: var(--c-track);
  -webkit-text-stroke: 1px var(--c-gold);
}

.driver-card__name {
  font-family: var(--font-display);
  font-size: 1.2rem;
}

.driver-card__team {
  font-size: 0.8rem;
  color: var(--c-muted);
}

.driver-card__desc {
  color: var(--c-muted);
  font-size: 0.9rem;
  margin-bottom: 20px;
}

.driver-card:hover {
  transform: translateY(-4px);
  border-color: var(--c-red);
}

/* Grid de estadísticas, estilo pantalla de cronometraje */
.driver-card__stats {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  background: var(--c-asphalt);
  border: 1px solid var(--c-track);
  border-radius: 8px;
  padding: 14px 8px;
}

.driver-card__stats li {
  text-align: center;
}

.stat {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.5rem;
  color: var(--c-red);
}

.stat-label {
  display: block;
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--c-muted);
  margin-top: 2px;
}

.drivers__note {
  margin-top: 24px;
  font-size: 0.78rem;
  color: var(--c-muted);
  font-family: var(--font-mono);
}

/* =========================================================
   FOOTER
========================================================= */
.footer {
  text-align: center;
  padding: 32px 24px;
  border-top: 1px solid var(--c-track);
  color: var(--c-muted);
  font-size: 0.85rem;
}

/* =========================================================
   BOTÓN DE MÚSICA DE FONDO
========================================================= */
.music-toggle {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 200;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  border: 1px solid var(--c-track);
  background: var(--c-carbon);
  color: var(--c-white);
  font-size: 1.3rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.music-toggle:hover {
  transform: translateY(-2px);
  border-color: var(--c-red);
}

/* Cuando la música está sonando, el ícono pulsa suavemente */
.music-toggle[aria-pressed="true"] {
  border-color: var(--c-red);
  color: var(--c-red);
  animation: pulse 1.6s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(225, 6, 0, 0.4); }
  50% { box-shadow: 0 0 0 8px rgba(225, 6, 0, 0); }
}

/* =========================================================
   RESPONSIVE
========================================================= */
@media (max-width: 720px) {
  .navbar__toggle {
    display: flex;
  }

  .navbar__links {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--c-asphalt);
    border-bottom: 1px solid var(--c-track);
    flex-direction: column;
    gap: 0;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
  }

  .navbar__links.is-open {
    max-height: 260px;
  }

  .navbar__links a {
    padding: 14px 24px;
    width: 100%;
    border-bottom: 1px solid var(--c-track);
  }

  .driver-card__stats {
    grid-template-columns: repeat(2, 1fr);
  }
}

.driver-card__photo {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--c-gold);
  flex-shrink: 0;
}

/* =========================================================
   BOTÓN "VOLVER ARRIBA"
========================================================= */
.back-to-top {
  position: fixed;
  bottom: 24px;
  left: 24px;
  z-index: 200;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  border: 1px solid var(--c-track);
  background: var(--c-carbon);
  color: var(--c-white);
  font-size: 1.3rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity 0.25s ease, transform 0.25s ease, border-color 0.2s ease, visibility 0.25s ease;
}

.back-to-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  border-color: var(--c-red);
  transform: translateY(-2px);
}