/* =========================================================
   FuelX — Landing page
   Design tokens extraídos de la identidad visual real de marca
   ========================================================= */

:root {
  /* Color */
  --bg: #07080a;
  --bg-soft: #0b0d0a;
  --surface: #12140f;
  --surface-2: #171a13;
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.14);

  --text: #f4f6f1;
  --text-muted: #b6bfb4;
  --text-faint: #7c8579;

  --green-300: #c3ff6e;
  --green-400: #a3e838;
  --green-500: #86e01e;
  --green-600: #64b810;
  --green-700: #3f8a06;
  --green-glow: rgba(134, 224, 30, 0.35);

  --amber: #c47a2e;

  /* Type */
  --font-head: "Inter", system-ui, -apple-system, sans-serif;
  --font-body: "Inter", system-ui, -apple-system, sans-serif;

  /* Space scale */
  --space-1: 0.5rem;
  --space-2: 0.75rem;
  --space-3: 1rem;
  --space-4: 1.5rem;
  --space-5: 2rem;
  --space-6: 3rem;
  --space-7: 4.5rem;
  --space-8: 6rem;

  /* Shape */
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-pill: 999px;

  /* Alto real del header — lo recalcula main.js y lo usa el menú móvil */
  --header-h: 72px;

  /* Motion */
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --dur-fast: 150ms;
  --dur-base: 250ms;
  --dur-slow: 550ms;
}

/* =========================================================
   Reset
   ========================================================= */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; overflow-x: hidden; }
body {
  min-height: 100svh;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  width: 100%;
}
img, picture, video { max-width: 100%; display: block; }
svg { display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; padding: 0; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
h1, h2, h3, h4 {
  font-family: var(--font-head);
  font-weight: 600;
  line-height: 1.12;
  letter-spacing: -0.021em;
}
/* El apriete escala con el tamano: en textos pequenos ya seria ilegible */
h3, h4 { letter-spacing: -0.012em; }

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

/* Focus visibility — never remove, only restyle */
:focus-visible {
  outline: 2px solid var(--green-400);
  outline-offset: 3px;
  border-radius: 4px;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -3.5rem;
  background: var(--green-500);
  color: #06110a;
  font-weight: 600;
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-sm);
  z-index: 999;
  transition: top var(--dur-base) var(--ease);
}
.skip-link:focus {
  top: 1rem;
}

/* =========================================================
   Layout helpers
   ========================================================= */
.wrap {
  width: 100%;
  max-width: 1200px;
  margin-inline: auto;
  padding-inline: var(--space-4);
}
.wrap.narrow { max-width: 760px; }

.section { padding-block: var(--space-8); }
.section-alt { background: var(--bg-soft); border-block: 1px solid var(--border); }

.section-head { max-width: 640px; margin-bottom: var(--space-6); }
.section-lead { color: var(--text-muted); font-size: 1.0625rem; margin-top: var(--space-3); }
.section-note {
  margin-top: var(--space-5);
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface);
}
.section-note .icon { color: var(--green-500); flex-shrink: 0; }

.kicker {
  font-family: var(--font-head);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.75rem;
  color: var(--green-400);
  font-weight: 600;
  margin-bottom: var(--space-2);
}

h2 { font-size: clamp(1.75rem, 1.4rem + 1.6vw, 2.5rem); }
h3 { font-size: 1.15rem; }

.text-accent { color: var(--green-400); }

.split-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: var(--space-7);
  align-items: center;
}
.split-grid.reverse { grid-template-columns: 0.9fr 1.1fr; }
.split-grid.reverse > *:first-child { order: 2; }

/* =========================================================
   Icons
   ========================================================= */
.icon {
  stroke: currentColor;
  fill: none;
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-linejoin: round;
  flex-shrink: 0;
}
.icon-xl { width: 40px; height: 40px; stroke-width: 1.4; color: var(--green-500); }

/* =========================================================
   Buttons
   ========================================================= */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.875rem 1.5rem;
  min-height: 48px;
  border-radius: var(--radius-pill);
  font-weight: 600;
  font-size: 0.95rem;
  white-space: nowrap;
  transition: transform var(--dur-fast) var(--ease), box-shadow var(--dur-base) var(--ease), background var(--dur-base) var(--ease), border-color var(--dur-base) var(--ease);
  border: 1px solid transparent;
}
.btn-primary {
  background: linear-gradient(135deg, var(--green-400), var(--green-600));
  color: #06110a;
  box-shadow: 0 8px 24px -8px var(--green-glow);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 30px -8px var(--green-glow); }
.btn-primary:active { transform: translateY(0); }

.btn-ghost {
  background: transparent;
  border-color: var(--border-strong);
  color: var(--text);
}
.btn-ghost:hover { border-color: var(--green-500); color: var(--green-400); }

.btn-sm { padding: 0.6rem 1.1rem; min-height: 44px; font-size: 0.875rem; }

/* =========================================================
   Header
   ========================================================= */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(7, 8, 10, 0.78);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding-block: 0.85rem;
}
.brand-mark { height: 34px; width: auto; }

.main-nav ul {
  display: flex;
  gap: var(--space-5);
}
.main-nav a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-muted);
  padding: 0.5rem 0;
  position: relative;
  transition: color var(--dur-fast) var(--ease);
}
.main-nav a:hover { color: var(--text); }
.main-nav a::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -2px;
  height: 2px;
  background: var(--green-500);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--dur-base) var(--ease);
}
.main-nav a:hover::after { transform: scaleX(1); }

.header-actions { display: flex; align-items: center; gap: var(--space-3); }
.nav-toggle {
  display: none;
  width: 44px; height: 44px;
  align-items: center; justify-content: center;
  border-radius: var(--radius-sm);
}
/* CTA dentro del menú: solo existe cuando el header pasa a hamburguesa */
.nav-cta { display: none; margin: var(--space-4) auto 0; max-width: 420px; width: 100%; }
.nav-cta .btn { width: 100%; }

.nav-toggle .icon-close { display: none; }
.nav-toggle[aria-expanded="true"] .icon-open { display: none; }
.nav-toggle[aria-expanded="true"] .icon-close { display: block; }

/* =========================================================
   Hero
   ========================================================= */
.hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  min-height: 100svh;
  display: flex;
  align-items: center;
  padding-block: calc(var(--space-7) + 60px) var(--space-7);
}
.hero-bg-video {
  position: absolute;
  inset: 0;
  z-index: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 80% 45%;
  background: #05070a;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  /* Fixed px stops (not %) so the dark zone always covers the text column
     (.hero-copy, max-width 640px) regardless of viewport width — a
     percentage gradient would fade out under the text on narrower screens. */
  background:
    linear-gradient(90deg, rgba(5, 6, 8, 0.95) 0, rgba(5, 6, 8, 0.9) 700px, rgba(5, 6, 8, 0.55) 900px, rgba(5, 6, 8, 0.22) 1200px, rgba(5, 6, 8, 0.22) 100%),
    linear-gradient(to top, rgba(5, 6, 8, 0.6) 0, transparent 220px);
}
.hero-inner {
  position: relative;
  z-index: 2;
  width: 100%;
  padding-inline: clamp(1.5rem, 6vw, 6rem);
  padding-bottom: var(--space-7);
}
.hero-copy { max-width: 640px; }
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--green-400);
  background: rgba(134, 224, 30, 0.1);
  border: 1px solid rgba(134, 224, 30, 0.25);
  padding: 0.4rem 0.9rem;
  border-radius: var(--radius-pill);
  margin-bottom: var(--space-4);
}
.hero-copy h1 {
  font-size: clamp(2.25rem, 1.7rem + 2.6vw, 3.5rem);
  letter-spacing: -0.032em;
  line-height: 1.06;
  font-weight: 700;
  max-width: 14ch;
}
.hero-lead {
  margin-top: var(--space-4);
  font-size: 1.125rem;
  color: var(--text-muted);
  max-width: 46ch;
}
.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-5);
}
.hero-chips {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  margin-top: var(--space-6);
  padding-top: var(--space-5);
  border-top: 1px solid var(--border);
}
.hero-chips li {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}
.hero-chips .icon { color: var(--green-500); }

/* =========================================================
   Video section
   ========================================================= */
.video-section {
  position: relative;
  overflow: hidden;
  isolation: isolate;
}
.video-section-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 0;
  pointer-events: none;
}
.video-section-overlay {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(5, 6, 8, 0.7) 0%, rgba(5, 6, 8, 0.4) 45%, rgba(5, 6, 8, 0.75) 100%);
}
.video-section > .wrap {
  position: relative;
  z-index: 2;
}
.video-player {
  position: relative;
  aspect-ratio: 16 / 9;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--surface);
  border: 1px solid var(--border);
  box-shadow: 0 30px 60px -30px rgba(0, 0, 0, 0.7);
}
.video-player video {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  background: #000;
}
.video-play-btn {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(7, 8, 10, 0.25);
  transition: background var(--dur-base) var(--ease);
}
.video-play-btn::before {
  content: "";
  position: absolute;
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: var(--green-500);
  opacity: 0.35;
  animation: playPulse 2.2s ease-out infinite;
}
.video-play-btn .icon {
  position: relative;
  z-index: 1;
  width: 76px;
  height: 76px;
  padding: 24px;
  border-radius: 50%;
  color: #06110a;
  background: linear-gradient(135deg, var(--green-400), var(--green-600));
  box-shadow: 0 12px 30px -8px var(--green-glow);
  transition: transform var(--dur-fast) var(--ease);
}
.video-play-btn:hover .icon { transform: scale(1.08); }
.video-play-btn:hover { background: rgba(7, 8, 10, 0.4); }
.video-play-btn[hidden] { display: none; }

@keyframes playPulse {
  0% { transform: scale(1); opacity: 0.35; }
  70% { transform: scale(1.6); opacity: 0; }
  100% { transform: scale(1.6); opacity: 0; }
}
@media (prefers-reduced-motion: reduce) {
  .video-play-btn::before { animation: none; }
}

.video-caption {
  margin-top: var(--space-3);
  color: var(--text-faint);
  font-size: 0.85rem;
  text-align: center;
}

.feature-strip-wrap {
  position: relative;
  z-index: 2;
  margin-top: -72px;
}
.feature-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
  padding: var(--space-5);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: 0 20px 40px -20px rgba(0, 0, 0, 0.6);
}
.feature-strip li { display: flex; gap: var(--space-3); align-items: flex-start; }
.feature-strip .icon { color: var(--green-500); margin-top: 2px; flex-shrink: 0; }
.feature-strip strong { display: block; font-family: var(--font-head); font-weight: 600; margin-bottom: 2px; }
.feature-strip span { color: var(--text-muted); font-size: 0.9rem; }

/* =========================================================
   Check list
   ========================================================= */
.check-list { margin-top: var(--space-4); display: grid; gap: var(--space-2); }
.check-list li { display: flex; align-items: flex-start; gap: 0.6rem; color: var(--text-muted); }
.check-list .icon { color: var(--green-500); margin-top: 3px; }

/* =========================================================
   Stat card (Qué es FuelX)
   ========================================================= */
.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  text-align: center;
  position: relative;
  overflow: hidden;
}
.stat-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(60% 60% at 50% 0%, var(--green-glow), transparent 70%);
  opacity: 0.5;
}
.stat-card > * { position: relative; }
/* La tarjeta es text-align:center, pero el <svg> es display:block y no
   responde a text-align — necesita margin auto en todos los anchos */
.stat-card .icon-xl { margin-inline: auto; }
.stat-title { color: var(--text-muted); font-size: 0.85rem; margin-top: var(--space-3); }
.stat-value {
  font-family: var(--font-head);
  font-size: 3rem;
  font-weight: 700;
  color: var(--green-400);
  line-height: 1;
  margin-top: 0.25rem;
}
.stat-desc { color: var(--text-muted); font-size: 0.9rem; margin-top: var(--space-3); }

.stat-sizes {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.6rem;
  margin-top: 0.6rem;
}
.stat-sizes li {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.4rem;
  line-height: 1;
  color: var(--green-400);
  background: rgba(134, 224, 30, 0.12);
  border: 1px solid rgba(134, 224, 30, 0.4);
  border-radius: var(--radius-pill);
  padding: 0.55rem 1.3rem;
  white-space: nowrap;
}

/* =========================================================
   Steps (Cómo funciona)
   ========================================================= */
.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-5);
  counter-reset: step;
  position: relative;
}
.steps::before {
  content: "";
  position: absolute;
  top: 34px;
  left: calc(100% / 6);
  right: calc(100% / 6);
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-strong) 15%, var(--border-strong) 85%, transparent);
  z-index: 0;
}
.steps li {
  position: relative;
  z-index: 1;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
}
.step-icon {
  width: 68px; height: 68px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(134,224,30,0.14), transparent 70%);
  border: 1px solid rgba(134,224,30,0.3);
  color: var(--green-400);
  margin-bottom: var(--space-4);
}
.step-no {
  position: absolute;
  top: var(--space-5);
  right: var(--space-5);
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 0.85rem;
  color: var(--text-faint);
}
.steps h3 { margin-bottom: 0.35rem; }
.steps p { color: var(--text-muted); font-size: 0.9rem; }

/* =========================================================
   Card grids
   ========================================================= */
.card-grid { display: grid; gap: var(--space-4); }
.card-grid.three { grid-template-columns: repeat(3, 1fr); }
.card-grid.four { grid-template-columns: repeat(4, 1fr); }

.feature-card, .audience-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-5);
  transition: border-color var(--dur-base) var(--ease), transform var(--dur-base) var(--ease), background var(--dur-base) var(--ease);
}
.feature-card:hover, .audience-card:hover {
  border-color: rgba(134, 224, 30, 0.35);
  transform: translateY(-4px);
  background: var(--surface-2);
}
.feature-card .icon, .audience-card .icon { color: var(--green-500); margin-bottom: var(--space-3); }
.feature-card h3, .audience-card h3 { margin-bottom: 0.4rem; }
.feature-card p, .audience-card p { color: var(--text-muted); font-size: 0.9rem; }

/* =========================================================
   Usage card (Empaque)
   ========================================================= */
.usage-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
}
.mini-steps { display: grid; gap: var(--space-3); margin: var(--space-4) 0 var(--space-5); }
.mini-steps li {
  display: flex; align-items: center; gap: var(--space-3);
  font-weight: 500;
}
.mini-steps span {
  width: 30px; height: 30px;
  flex-shrink: 0;
  border-radius: 50%;
  background: rgba(134,224,30,0.14);
  color: var(--green-400);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 0.85rem;
}
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--green-400);
  background: rgba(134,224,30,0.1);
  border: 1px solid rgba(134,224,30,0.25);
  padding: 0.6rem 1rem;
  border-radius: var(--radius-pill);
}

/* =========================================================
   Banner flotante de país
   ========================================================= */
.geo-gate {
  position: fixed;
  inset: 0;
  z-index: 300;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
  background: rgba(4, 5, 7, 0.82);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  animation: geoFade var(--dur-base) var(--ease) both;
}
.geo-gate[hidden] { display: none; }

.geo-card {
  position: relative;
  width: min(400px, 100%);
  max-height: calc(100dvh - var(--space-5) * 2);
  overflow-y: auto;
  background: #0a0a0a;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  box-shadow: 0 30px 80px -20px rgba(0, 0, 0, 0.9);
  padding: var(--space-6) var(--space-5) var(--space-5);
  text-align: center;
  animation: geoIn var(--dur-slow) var(--ease) both;
}
.geo-logo { height: 34px; width: auto; margin: 0 auto var(--space-4); }

@keyframes geoFade { from { opacity: 0; } to { opacity: 1; } }
@keyframes geoIn {
  from { opacity: 0; transform: translateY(14px) scale(0.98); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}
@media (prefers-reduced-motion: reduce) {
  .geo-gate, .geo-card { animation: none; }
}

.geo-close {
  position: absolute;
  top: 8px;
  right: 8px;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  color: var(--text-faint);
  transition: color var(--dur-fast) var(--ease);
}
.geo-close:hover { color: var(--text); }

.geo-title {
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 1.25rem;
}
.geo-sub {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-top: 4px;
  margin-bottom: var(--space-4);
}
.geo-options { display: grid; gap: 0.6rem; }
.geo-btn {
  min-height: 52px;
  padding: 0.7rem 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-strong);
  color: var(--text);
  font-family: var(--font-head);
  font-size: 1rem;
  font-weight: 600;
  transition: border-color var(--dur-base) var(--ease), background var(--dur-base) var(--ease), transform var(--dur-fast) var(--ease);
}
.geo-btn:hover {
  border-color: var(--green-500);
  background: rgba(134, 224, 30, 0.1);
}
.geo-btn:active { transform: scale(0.98); }
.geo-btn small {
  display: inline-block;
  margin-left: 0.4rem;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--green-400);
}

/* País detectado por la ubicación: se marca, no se impone */
.geo-btn.is-sugerido {
  border-color: var(--green-500);
  background: rgba(134, 224, 30, 0.12);
}
.geo-btn.is-sugerido::after {
  content: "";
  display: inline-block;
  width: 7px;
  height: 7px;
  margin-left: 0.5rem;
  border-radius: 50%;
  background: var(--green-500);
  vertical-align: middle;
}
.geo-hint {
  margin-top: var(--space-3);
  color: var(--text-faint);
  font-size: 0.75rem;
}

/* Congela el fondo mientras el aviso está encima */
body.geo-abierto { overflow: hidden; }

.lang-link {
  color: var(--text-muted);
  font-weight: 600;
  transition: color var(--dur-fast) var(--ease);
}
.lang-link:hover { color: var(--green-400); }

/* =========================================================
   Productos (Efficient / PowerPlus)
   ========================================================= */
.product-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-4);
  /* stretch (por defecto) + margin-top:auto en el botón: las dos tarjetas
     miden lo mismo y los botones quedan a la misma altura aunque el texto
     de una envuelva en más líneas que el de la otra */
}
.product-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  transition: border-color var(--dur-base) var(--ease), transform var(--dur-base) var(--ease);
}
.product-card:hover { transform: translateY(-4px); }
.product-card .btn { margin-top: auto; }
.product-card .check-list { margin-top: 0; }

/* La etiqueta de texto acompaña siempre al color: quien no distingue
   verde de ámbar debe entender igual cuál es cuál */
.product-tag {
  align-self: flex-start;
  font-family: var(--font-head);
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 0.3rem 0.7rem;
  border-radius: var(--radius-pill);
}
.product-head { display: flex; align-items: center; gap: var(--space-3); }
.product-head h3 { font-size: 1.25rem; }
.product-for { color: var(--text-faint); font-size: 0.85rem; margin-top: 2px; }
.product-claim {
  font-family: var(--font-head);
  font-size: 1.05rem;
  font-weight: 600;
}
.icon-lg { width: 30px; height: 30px; stroke-width: 1.5; flex-shrink: 0; }

.product-card.is-featured { border-color: rgba(134, 224, 30, 0.45); }
.product-card.is-featured:hover { border-color: var(--green-500); }
.product-card.is-featured .product-tag { background: rgba(134, 224, 30, 0.14); color: var(--green-400); }
.product-card.is-featured .icon-lg,
.product-card.is-featured .product-claim { color: var(--green-400); }

.product-card.is-power { border-color: rgba(196, 122, 46, 0.4); }
.product-card.is-power:hover { border-color: var(--amber); }
.product-card.is-power .product-tag { background: rgba(196, 122, 46, 0.16); color: #e9a45f; }
.product-card.is-power .icon-lg,
.product-card.is-power .product-claim { color: #e9a45f; }
.product-card.is-power .check-list .icon { color: #e9a45f; }
.product-card.is-power .btn-ghost:hover { border-color: var(--amber); color: #e9a45f; }

/* =========================================================
   Línea de canal activo (el país se elige en el banner)
   ========================================================= */
.channel-line {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  margin-top: var(--space-4);
  color: var(--text-muted);
  font-size: 0.9rem;
}
.channel-line .icon { color: var(--green-500); }
.channel-line strong { color: var(--text); font-weight: 600; }
/* El número se muestra como texto seleccionable a propósito: en escritorio
   muchos navegadores ignoran los enlaces sms:, y sin el número a la vista
   el cliente de EE.UU. se queda sin forma de contactar */
.country-number {
  color: var(--green-400);
  font-weight: 600;
  user-select: all;
}
.country-number:hover { text-decoration: underline; }

.link-btn {
  min-height: 44px;
  padding: 0 0.5rem;
  color: var(--text-faint);
  font-size: 0.85rem;
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color var(--dur-fast) var(--ease);
}
.link-btn:hover { color: var(--green-400); }

/* =========================================================
   Contact card
   ========================================================= */
.contact-card {
  margin-top: var(--space-6);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-5);
  background: linear-gradient(135deg, var(--surface-2), var(--surface));
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
}
.contact-card h3 { font-size: 1.3rem; margin-bottom: 0.4rem; }
.contact-card p { color: var(--text-muted); max-width: 46ch; }
.contact-actions { display: flex; gap: var(--space-3); flex-wrap: wrap; }

/* =========================================================
   FAQ
   ========================================================= */
.faq-list { display: grid; gap: var(--space-3); }
.faq-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-4) var(--space-5);
}
.faq-item summary {
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  font-weight: 600;
  font-family: var(--font-head);
  list-style: none;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary .icon { color: var(--green-500); transition: transform var(--dur-base) var(--ease); flex-shrink: 0; }
.faq-item[open] summary .icon { transform: rotate(180deg); }
.faq-item p { color: var(--text-muted); margin-top: var(--space-3); font-size: 0.95rem; }

/* =========================================================
   CTA final
   ========================================================= */
.cta-final {
  background:
    radial-gradient(60% 100% at 50% 0%, var(--green-glow), transparent 70%),
    var(--bg-soft);
  border-top: 1px solid var(--border);
  text-align: center;
}
.cta-final-inner { max-width: 640px; margin-inline: auto; }
.cta-final h2 { margin-bottom: var(--space-3); }
.cta-final p { color: var(--text-muted); font-size: 1.05rem; }
.cta-final .hero-cta { justify-content: center; }

/* =========================================================
   Footer
   ========================================================= */
.site-footer { background: var(--bg-soft); border-top: 1px solid var(--border); padding-top: var(--space-7); }
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: var(--space-5);
  padding-bottom: var(--space-6);
}
.footer-brand p { color: var(--text-muted); margin-top: var(--space-3); font-size: 0.9rem; }
.footer-col h4 { font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--text-faint); margin-bottom: var(--space-3); }
.footer-col ul { display: grid; gap: 0.6rem; }
.footer-col a { color: var(--text-muted); font-size: 0.9rem; display: inline-flex; align-items: center; gap: 0.4rem; transition: color var(--dur-fast) var(--ease); }
.footer-col a:hover { color: var(--green-400); }

.footer-bottom {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-2);
  border-top: 1px solid var(--border);
  padding-block: var(--space-4);
  color: var(--text-faint);
  font-size: 0.8rem;
}

/* =========================================================
   Scroll reveal
   ========================================================= */
[data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity var(--dur-slow) var(--ease), transform var(--dur-slow) var(--ease);
}
[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}
@media (prefers-reduced-motion: reduce) {
  [data-reveal] { opacity: 1; transform: none; }
}

/* =========================================================
   Responsive
   ========================================================= */
@media (max-width: 960px) {
  .split-grid, .split-grid.reverse { grid-template-columns: 1fr; gap: var(--space-5); }
  .split-grid.reverse > *:first-child { order: 0; }
  .card-grid.four { grid-template-columns: repeat(2, 1fr); }
  /* Las rejillas de 3 y los pasos se quedan en 3 columnas hasta el móvil:
     a 2 columnas la tercera tarjeta quedaba sola en su fila, y apilar los
     pasos en tablet obligaba a un scroll larguísimo para tres tarjetas */
  .steps { gap: var(--space-4); }
  .steps li { padding: var(--space-4); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .feature-strip-wrap { margin-top: -48px; }
}

/* =========================================================
   Navegación compacta — hasta 1023px
   Los 7 enlaces + logo + botón no caben en el header por debajo de
   ~1024px: a 768px el logo se comprimía a 0 (invisible) y los enlaces
   saltaban a dos líneas. Por eso el menú hamburguesa cubre también la
   tablet, y no solo el móvil.
   ========================================================= */
@media (max-width: 1023px) {
  /* El header pierde el backdrop-filter a propósito: un filtro en el
     ancestro lo convierte en bloque contenedor de sus descendientes
     position:fixed, y eso encerraba el menú dentro de la franja del header en
     lugar de dejarlo cubrir la pantalla. Fondo sólido en su lugar. */
  .site-header {
    background: #0a0a0a;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
  }
  .header-row {
    min-height: 56px;
    padding-block: 0.6rem;
    gap: var(--space-3);
  }
  .brand { display: flex; align-items: center; flex-shrink: 0; }

  .main-nav {
    position: fixed;
    top: var(--header-h, 72px);
    right: 0;
    bottom: 0;
    left: 0;
    background: #0a0a0a;
    padding: var(--space-4);
    transform: translateX(100%);
    transition: transform var(--dur-base) var(--ease);
    overflow-y: auto;
    overscroll-behavior: contain;
    display: flex;
    flex-direction: column;
  }
  .main-nav.is-open { transform: translateX(0); }
  /* margin auto (no justify-content) para centrar vertical sin recortar
     el primer enlace cuando la lista es más alta que la pantalla */
  .main-nav ul {
    flex-direction: column;
    gap: 0;
    width: 100%;
    max-width: 420px;
    margin: auto;
  }
  .main-nav a {
    display: block;
    text-align: center;
    padding: var(--space-3) 0;
    font-size: 1.05rem;
    border-bottom: 1px solid var(--border);
  }
  .main-nav li:last-child a { border-bottom: 0; }
  .main-nav a::after { display: none; }

  .nav-toggle { display: flex; }
  /* El CTA sale del header y entra al menú: era la acción principal y
     desaparecía por completo al pasar a hamburguesa */
  .header-actions .btn-sm { display: none; }
  .nav-cta { display: block; }

  /* Bloquea el scroll del fondo mientras el menú está abierto */
  body.nav-open { overflow: hidden; }
}

@media (max-width: 767px) {
  .product-grid { grid-template-columns: 1fr; }
  .product-card { align-items: center; text-align: center; }
  .product-card .product-tag { align-self: center; }
  .product-head { flex-direction: column; text-align: center; gap: var(--space-2); }
  .product-card .btn { width: 100%; }

  .steps { grid-template-columns: 1fr; gap: var(--space-5); }
  .steps::before { display: none; }
  .steps li { padding: var(--space-5); }

  .feature-strip { grid-template-columns: 1fr; }
  .feature-strip-wrap { margin-top: var(--space-4); }
  .hero { padding-top: var(--space-6); }

  .card-grid.four, .card-grid.three { grid-template-columns: 1fr; }
  .stat-card { padding: var(--space-5); }
  .stat-sizes { gap: 0.4rem; }
  .stat-sizes li { font-size: 1.1rem; padding: 0.45rem 0.85rem; }
  .footer-grid { grid-template-columns: 1fr; }
  .contact-card { flex-direction: column; align-items: center; text-align: center; }
  .contact-actions { width: 100%; }
  .contact-actions .btn { flex: 1; }
}

/* =========================================================
   Centrado de contenido en móvil
   ========================================================= */
@media (max-width: 767px) {
  .section-head,
  .cta-final-inner,
  .hero-copy,
  .footer-brand p,
  .contact-card p,
  .section-lead {
    margin-inline: auto;
  }

  .section-head,
  .hero-copy,
  .stat-card,
  .feature-card,
  .audience-card,
  .steps li,
  .usage-card,
  .footer-col,
  .footer-brand,
  /* "¿Qué es FuelX?" y "Empaque" no usan .section-head: sus encabezados son
     divs sueltos dentro de .split-grid, por eso quedaban alineados a la
     izquierda mientras el resto de la página iba centrado. */
  .split-grid > * {
    text-align: center;
  }

  .hero-copy h1,
  .hero-lead,
  .section-lead,
  .contact-card p {
    max-width: none;
  }

  /* Botones y filas centrados */
  .hero-cta,
  .contact-actions,
  .footer-bottom,
  .hero-chips { justify-content: center; }
  .section-note { justify-content: center; }

  /* Las listas con viñeta se centran COMO BLOQUE, no fila por fila: con grid
     + justify-content la pista se dimensiona al contenido y se centra, y
     todos los items comparten borde izquierdo. Centrar cada fila por separado
     dejaba los ✓ y los números en escalera. */
  .check-list,
  .mini-steps {
    justify-content: center;
  }
  .check-list li,
  .mini-steps li {
    justify-content: flex-start;
    text-align: left;
  }

  /* La franja de beneficios apila icono sobre texto, igual que las tarjetas
     de "Beneficios", en vez de dejar el icono flotando a media altura */
  .feature-strip li {
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: var(--space-2);
  }
  .feature-strip .icon { margin-top: 0; }

  .footer-col ul { justify-items: center; }

  /* Iconos de bloque: centrarlos sobre su texto. Son <svg>/<img> con
     display:block, así que text-align no los mueve — necesitan margin auto. */
  .feature-card > .icon,
  .audience-card > .icon,
  .step-icon,
  .icon-xl,
  .brand-mark,
  .footer-brand img { margin-inline: auto; }

  /* El nº de paso deja de flotar para no chocar con el título centrado */
  .step-no { position: static; display: block; margin-bottom: var(--space-2); }
  .steps li { display: flex; flex-direction: column; align-items: center; }

  /* La píldora está pensada para una línea; al partirse en dos, el radio
     redondo y el ✓ centrado vertical quedaban raros. En pantalla estrecha
     pasa a rectángulo redondeado con el icono alineado a la primera línea */
  .badge {
    margin-inline: auto;
    border-radius: var(--radius-md);
    align-items: flex-start;
    text-align: left;
  }
  .badge .icon { margin-top: 3px; }

  .faq-item summary { text-align: left; }

  /* El degradado de escritorio usa paradas fijas en px (0.95 en 0px, 0.9 en
     700px) pensadas para oscurecer solo la columna izquierda del texto. Un
     móvil mide 360-412px, así que TODA la pantalla caía en la zona más oscura
     y el video quedaba tapado al 90-95%. En vertical se oscurecen los
     extremos y se deja respirar el centro. */
  .hero-overlay {
    background: linear-gradient(
      180deg,
      rgba(5, 6, 8, 0.88) 0%,
      rgba(5, 6, 8, 0.62) 30%,
      rgba(5, 6, 8, 0.62) 62%,
      rgba(5, 6, 8, 0.92) 100%
    );
  }
}

@media (max-width: 420px) {
  /* grid en vez de flex-column: la pista se ajusta al contenido y se centra,
     así los tres iconos comparten borde izquierdo (el <ul> sigue midiendo el
     ancho completo, por lo que la línea divisoria de arriba no se encoge) */
  .hero-chips {
    display: grid;
    justify-content: center;
    gap: var(--space-2);
  }
  .stat-card { padding: var(--space-4); }
  .stat-sizes { gap: 0.3rem; }
  .stat-sizes li { font-size: 1rem; padding: 0.4rem 0.7rem; }
}