/* ============================================
   TRANSPORTES TNL — LANDING
   Sistema de design tokens
   ============================================ */

:root {
  /* Paleta — Carbón + crema + cobre industrial */
  --forest-900: oklch(0.14 0.01 60);
  --forest-800: oklch(0.20 0.012 60);
  --forest-700: oklch(0.26 0.015 60);
  --forest-600: oklch(0.34 0.018 60);
  --forest-500: oklch(0.44 0.02 60);
  --forest-100: oklch(0.92 0.015 60);
  --forest-50:  oklch(0.97 0.012 60);

  --cream-50:   oklch(0.98 0.012 85);
  --cream-100:  oklch(0.96 0.018 85);
  --cream-200:  oklch(0.93 0.025 85);
  --cream-300:  oklch(0.88 0.03 85);

  --copper:     oklch(0.68 0.15 45);
  --copper-dk:  oklch(0.52 0.15 45);

  --ink-900:    oklch(0.14 0.01 60);
  --ink-700:    oklch(0.30 0.01 60);
  --ink-500:    oklch(0.50 0.01 60);
  --ink-300:    oklch(0.72 0.008 60);

  /* Semánticos — serán sobreescritos por tema */
  --bg:         var(--cream-100);
  --bg-alt:     var(--cream-50);
  --bg-dark:    var(--forest-900);
  --surface:    var(--cream-50);
  --fg:         var(--ink-900);
  --fg-muted:   var(--ink-500);
  --fg-soft:    var(--ink-700);
  --brand:      var(--forest-800);
  --brand-ink:  var(--cream-50);
  --accent:     var(--copper);
  --rule:       oklch(0.88 0.018 85);

  /* Tipografía */
  --font-display: 'Fraunces', 'Times New Roman', serif;
  --font-sans: 'Inter Tight', 'Helvetica Neue', Arial, sans-serif;
  --font-mono: 'JetBrains Mono', 'Courier New', monospace;

  --density: 1;

  /* Escala */
  --container: 1440px;
  --gutter: calc(24px * var(--density));
  --section-y: calc(140px * var(--density));
}

[data-theme="dark"] {
  --bg:         var(--forest-900);
  --bg-alt:     var(--forest-800);
  --surface:    oklch(0.25 0.045 155);
  --fg:         var(--cream-50);
  --fg-muted:   oklch(0.7 0.02 155);
  --fg-soft:    oklch(0.85 0.02 155);
  --brand:      var(--cream-50);
  --brand-ink:  var(--forest-900);
  --rule:       oklch(0.35 0.04 155);
}

/* Variantes tipográficas */
[data-type="editorial"] {
  --font-display: 'Fraunces', serif;
  --font-sans: 'Inter Tight', sans-serif;
}
[data-type="industrial"] {
  --font-display: 'Archivo', sans-serif;
  --font-sans: 'Archivo', sans-serif;
}
[data-type="technical"] {
  --font-display: 'Space Grotesk', sans-serif;
  --font-sans: 'Space Grotesk', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
}

/* Reset */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html, body { height: 100%; }
body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--fg);
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
  transition: background-color .4s ease, color .4s ease;
}

img, svg, video { display: block; max-width: 100%; }
button { font: inherit; cursor: pointer; border: 0; background: transparent; color: inherit; }
a { color: inherit; text-decoration: none; }

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

/* Tipografía base */
.eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--fg-muted);
  font-weight: 500;
}

.display-xl {
  font-family: var(--font-display);
  font-size: clamp(56px, 9vw, 148px);
  line-height: 0.92;
  letter-spacing: -0.03em;
  font-weight: 300;
}
.display-xl em {
  font-style: italic;
  font-weight: 300;
}

.display-lg {
  font-family: var(--font-display);
  font-size: clamp(40px, 6vw, 88px);
  line-height: 0.95;
  letter-spacing: -0.025em;
  font-weight: 300;
}
.display-lg em { font-style: italic; }

.display-md {
  font-family: var(--font-display);
  font-size: clamp(32px, 4vw, 56px);
  line-height: 1;
  letter-spacing: -0.02em;
  font-weight: 300;
}

.lead {
  font-size: clamp(17px, 1.4vw, 22px);
  line-height: 1.4;
  color: var(--fg-soft);
  max-width: 52ch;
}

.small {
  font-size: 13px;
  color: var(--fg-muted);
}

/* Navbar */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 50;
  padding: 20px var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  mix-blend-mode: difference;
  color: var(--cream-50);
}
.nav__logo {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 400;
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
  gap: 10px;
}
.nav__logo-mark {
  width: 32px; height: 32px;
  border: 1px solid currentColor;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0;
}
.nav__menu {
  display: flex;
  gap: 36px;
  font-size: 13px;
  letter-spacing: 0.02em;
}
.nav__menu a { opacity: .85; transition: opacity .2s; }
.nav__menu a:hover { opacity: 1; }
.nav__cta {
  border: 1px solid currentColor;
  padding: 10px 18px;
  border-radius: 999px;
  font-size: 13px;
  font-family: var(--font-mono);
  letter-spacing: 0.05em;
  transition: background .25s, color .25s;
}
.nav__cta:hover {
  background: currentColor;
  color: var(--forest-900);
}

@media (max-width: 780px) {
  .nav__menu { display: none; }
}

/* Secciones */
section {
  padding: var(--section-y) 0;
  position: relative;
}
.rule {
  border: 0;
  border-top: 1px solid var(--rule);
  margin: 0;
}

/* Botones */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 16px 28px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.01em;
  transition: transform .25s, background .25s, color .25s, box-shadow .25s;
}
.btn--primary {
  background: var(--brand);
  color: var(--brand-ink);
}
.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 30px -12px oklch(0.28 0.05 155 / 0.5);
}
.btn--ghost {
  border: 1px solid currentColor;
  color: var(--fg);
}
.btn--ghost:hover {
  background: var(--fg);
  color: var(--bg);
}

.btn__arrow {
  width: 20px; height: 20px;
  display: inline-grid;
  place-items: center;
  transition: transform .25s;
}
.btn:hover .btn__arrow { transform: translateX(4px); }

/* Marquee */
.marquee {
  overflow: hidden;
  white-space: nowrap;
  border-block: 1px solid var(--rule);
  padding: 22px 0;
  background: var(--bg-alt);
}
.marquee__track {
  display: inline-flex;
  gap: 64px;
  animation: scroll 40s linear infinite;
  will-change: transform;
}
.marquee__item {
  font-family: var(--font-display);
  font-size: clamp(28px, 3vw, 44px);
  font-weight: 300;
  letter-spacing: -0.02em;
  font-style: italic;
  color: var(--fg);
  opacity: .9;
}
.marquee__dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--accent);
  align-self: center;
}
@keyframes scroll {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

[data-motion="low"] .marquee__track { animation-duration: 90s; }
[data-motion="off"] .marquee__track { animation: none; }

/* Grid utils */
.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--gutter);
}

/* Fade in on scroll */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .9s ease, transform .9s ease;
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}
[data-motion="off"] .reveal {
  opacity: 1;
  transform: none;
  transition: none;
}

/* Floating truck decoration appearing between sections */
.floating-truck {
  position: fixed;
  bottom: 40px;
  left: -200px;
  width: 180px;
  height: auto;
  z-index: 5;
  pointer-events: none;
  opacity: 0;
  filter: drop-shadow(0 12px 24px oklch(0 0 0 / 0.35));
  transition: opacity .5s ease;
}
.floating-truck.is-driving {
  opacity: 0.95;
  animation: truckDrive 14s linear infinite;
}
@keyframes truckDrive {
  0%   { left: -220px; transform: translateY(0) rotate(0deg); }
  50%  { transform: translateY(-4px) rotate(-0.5deg); }
  100% { left: calc(100% + 40px); transform: translateY(0) rotate(0deg); }
}
[data-motion="off"] .floating-truck { display: none; }

/* Section-wide subtle parallax background layer */
.parallax-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  opacity: 0.18;
  filter: grayscale(0.5);
  z-index: 0;
  will-change: transform;
}

/* Scroll-triggered reveal for images */
.img-reveal {
  overflow: hidden;
}
.img-reveal img {
  transition: transform 1.2s cubic-bezier(.2,.6,.2,1);
  transform: scale(1.12);
}
.img-reveal.is-visible img {
  transform: scale(1);
}

/* Marquee truck row */
.truck-ribbon {
  position: relative;
  overflow: hidden;
  background: var(--forest-900);
  padding: 32px 0;
  border-block: 1px solid oklch(0.3 0.015 60);
}
.truck-ribbon__track {
  display: flex;
  gap: 80px;
  animation: ribbonDrive 30s linear infinite;
  will-change: transform;
  align-items: center;
}
[data-motion="off"] .truck-ribbon__track { animation: none; }
[data-motion="low"] .truck-ribbon__track { animation-duration: 60s; }
@keyframes ribbonDrive {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}
.truck-ribbon__item {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  gap: 24px;
  color: var(--cream-50);
  font-family: var(--font-display);
  font-size: clamp(28px, 3vw, 48px);
  font-style: italic;
  font-weight: 300;
  white-space: nowrap;
}
.truck-ribbon__icon {
  width: 64px;
  height: 40px;
  opacity: 0.85;
}