/* ============================================================
   STARK UI 2.0 — Web pública gtastark.com  (v2)
   Paridad visual con user.gtastark.com
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=Chakra+Petch:wght@500;600;700&display=swap');

:root {
  --red-400: #ff5257;
  --red-500: #ff2e35;
  --red-600: #e31e24;
  --red-700: #a00f14;
  --red-800: #7d0b0f;
  --carbon-0: #05060a;
  --carbon-1: #0b0d12;
  --carbon-2: #12151c;
  --carbon-3: #1a1e27;
  --carbon-4: #232833;
  --text-hi: #f2f4f8;
  --text-mid: #9aa0ac;
  --text-low: #5c6270;
  --stroke-1: rgba(255,255,255,0.07);
  --stroke-2: rgba(255,255,255,0.12);
  --stroke-red: rgba(227,30,36,0.45);
  --r-md: 12px; --r-lg: 18px;
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --dur-2: 200ms; --dur-3: 340ms;
  --font-display: 'Chakra Petch', sans-serif;
  --font-body: 'Inter', sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  color: var(--text-mid);
  background:
    radial-gradient(ellipse at 15% 0%, rgba(227,30,36,0.10) 0%, transparent 50%),
    radial-gradient(ellipse at 85% 100%, rgba(227,30,36,0.07) 0%, transparent 55%),
    linear-gradient(160deg, #0b0d12 0%, #07090d 60%, #05060a 100%);
  background-color: #07090d;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; }
a { color: inherit; text-decoration: none; }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  text-transform: uppercase;
  color: var(--text-hi);
  letter-spacing: 1px;
  margin: 0;
}

::selection { background: rgba(227,30,36,0.55); color: #fff; }

/* Scrollbar */
::-webkit-scrollbar { width: 10px; }
::-webkit-scrollbar-track { background: var(--carbon-1); }
::-webkit-scrollbar-thumb {
  background: var(--carbon-4);
  border-radius: 5px;
  border: 2px solid var(--carbon-1);
}
::-webkit-scrollbar-thumb:hover { background: var(--red-700); }

.sk-container {
  width: 100%;
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- Kicker ---------- */
.sk-kicker {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-display);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 4px;
  text-transform: uppercase;
  color: var(--text-mid);
  margin: 0 0 14px;
}
.sk-kicker::before {
  content: "";
  width: 22px;
  height: 2px;
  background: var(--red-600);
  flex: none;
}

/* ---------- Botones ---------- */
.sk-btn {
  position: relative;
  overflow: hidden;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  padding: 14px 28px;
  border-radius: var(--r-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: background var(--dur-2) var(--ease-out),
              border-color var(--dur-2) var(--ease-out),
              transform var(--dur-2) var(--ease-out),
              box-shadow var(--dur-2) var(--ease-out);
  white-space: nowrap;
}
.sk-btn svg { width: 17px; height: 17px; flex: none; }
.sk-btn:active { transform: scale(0.98); }

.sk-btn-primary {
  color: #fff;
  background: linear-gradient(135deg, var(--red-600) 0%, var(--red-700) 100%);
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.18), 0 8px 24px rgba(227,30,36,0.25);
}
.sk-btn-primary:hover {
  background: linear-gradient(135deg, var(--red-500) 0%, var(--red-700) 100%);
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.22), 0 10px 28px rgba(227,30,36,0.35);
}
/* Shine sweep */
.sk-btn-primary::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(105deg, transparent 42%, rgba(255,255,255,0.28) 50%, transparent 58%);
  transform: translateX(-130%);
  pointer-events: none;
}
.sk-btn-primary:hover::after {
  transform: translateX(130%);
  transition: transform 650ms var(--ease-out);
}

.sk-btn-glass {
  color: var(--text-hi);
  background: rgba(10,11,15,0.6);
  border-color: var(--stroke-2);
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.05);
}
.sk-btn-glass:hover { border-color: var(--stroke-red); }

.sk-btn-sm { padding: 10px 20px; font-size: 12px; }

/* ---------- Header ---------- */
.sk-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  transition: background var(--dur-3) var(--ease-out),
              border-color var(--dur-3) var(--ease-out);
  border-bottom: 1px solid transparent;
}
.sk-header::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--red-600), transparent);
}
.sk-header.is-scrolled,
.sk-header.is-menu-open {
  background: linear-gradient(180deg, rgba(11,13,18,0.97), rgba(11,13,18,0.92));
  border-bottom-color: var(--stroke-1);
  box-shadow: 0 12px 32px rgba(0,0,0,0.45);
}

.sk-header-inner {
  display: flex;
  align-items: center;
  gap: 32px;
  height: 72px;
}
.sk-brand { display: inline-flex; align-items: center; flex: none; }
.sk-brand img {
  height: 46px;
  width: auto;
  filter: drop-shadow(0 6px 16px rgba(227,30,36,0.25));
  transition: transform var(--dur-2) var(--ease-out);
}
.sk-brand:hover img { transform: scale(1.04); }

.sk-nav {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-left: auto;
}
.sk-nav-link {
  position: relative;
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--text-mid);
  padding: 8px 13px;
  border-radius: 8px;
  transition: color var(--dur-2) var(--ease-out), background var(--dur-2) var(--ease-out);
}
.sk-nav-link::after {
  content: "";
  position: absolute;
  left: 13px; right: 13px; bottom: 3px;
  height: 2px;
  background: var(--red-600);
  border-radius: 1px;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--dur-2) var(--ease-out);
}
.sk-nav-link:hover { color: var(--text-hi); background: rgba(255,255,255,0.04); }
.sk-nav-link:hover::after { transform: scaleX(1); }
.sk-nav-link.is-active { color: var(--text-hi); }
.sk-nav-link.is-active::after { transform: scaleX(1); }

.sk-header-cta { display: flex; align-items: center; gap: 12px; flex: none; }

.sk-mobile-toggle {
  display: none;
  margin-left: auto;
  width: 44px; height: 44px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  background: rgba(10,11,15,0.6);
  border: 1px solid var(--stroke-2);
  border-radius: var(--r-md);
  cursor: pointer;
}
.sk-mobile-toggle span {
  display: block;
  width: 18px; height: 2px;
  background: var(--text-hi);
  border-radius: 1px;
  transition: transform var(--dur-2) var(--ease-out), opacity var(--dur-2) var(--ease-out);
}
.is-menu-open .sk-mobile-toggle span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.is-menu-open .sk-mobile-toggle span:nth-child(2) { opacity: 0; }
.is-menu-open .sk-mobile-toggle span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.sk-mobile-nav {
  display: none;
  flex-direction: column;
  gap: 4px;
  padding: 12px 24px 24px;
  border-top: 1px solid var(--stroke-1);
}
.is-menu-open .sk-mobile-nav { display: flex; }
.sk-mobile-nav a:not(.sk-btn) {
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--text-mid);
  padding: 12px 4px;
  border-bottom: 1px solid var(--stroke-1);
}
.sk-mobile-nav a:not(.sk-btn):hover { color: var(--text-hi); }
.sk-mobile-nav .sk-btn { margin-top: 14px; }

/* ---------- Hero ---------- */
.sk-hero {
  position: relative;
  min-height: 100vh;
  min-height: 100svh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
  padding: 130px 0 90px;
}
.sk-hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  will-change: transform;
}
.sk-hero-bg-img {
  position: absolute;
  inset: -4%;
  background-image: url('../img/slider/third_banner_bg--.jpg');
  background-size: cover;
  background-position: center 30%;
  animation: sk-kenburns 30s var(--ease-out) alternate infinite both;
}
@keyframes sk-kenburns {
  from { transform: scale(1); }
  to   { transform: scale(1.09); }
}
/* Grid HUD sutil */
.sk-hero-bg::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background-image:
    linear-gradient(rgba(255,255,255,0.028) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.028) 1px, transparent 1px);
  background-size: 54px 54px;
  -webkit-mask-image: radial-gradient(ellipse at 50% 45%, black 20%, transparent 75%);
          mask-image: radial-gradient(ellipse at 50% 45%, black 20%, transparent 75%);
  pointer-events: none;
}
.sk-hero-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    radial-gradient(ellipse at 50% 100%, rgba(227,30,36,0.14) 0%, transparent 55%),
    linear-gradient(180deg, rgba(5,6,10,0.82) 0%, rgba(5,6,10,0.55) 40%, rgba(7,9,13,0.88) 78%, #05060a 100%);
}

.sk-hero-inner {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
}
.sk-hero-inner > * {
  animation: sk-rise 700ms var(--ease-out) both;
}
.sk-hero-inner > *:nth-child(2) { animation-delay: 120ms; }
.sk-hero-inner > *:nth-child(3) { animation-delay: 240ms; }
.sk-hero-inner > *:nth-child(4) { animation-delay: 360ms; }
@keyframes sk-rise {
  from { opacity: 0; transform: translateY(26px); }
  to   { opacity: 1; transform: translateY(0); }
}

.sk-hero-logo {
  width: min(420px, 70vw);
  height: auto;
  filter: drop-shadow(0 6px 16px rgba(227,30,36,0.25));
  margin-bottom: 34px;
}

.sk-hero h1 {
  font-size: clamp(26px, 4vw, 42px);
  font-weight: 700;
  letter-spacing: 2px;
  line-height: 1.2;
  max-width: 720px;
}
.sk-hero-desc {
  font-size: clamp(15px, 1.6vw, 17px);
  color: var(--text-mid);
  max-width: 560px;
  margin: 18px 0 34px;
}
.sk-hero-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px;
}

/* Indicador de scroll */
.sk-hero-scroll {
  position: absolute;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1;
  width: 22px; height: 36px;
  border: 1px solid var(--stroke-2);
  border-radius: 11px;
  animation: sk-rise 700ms var(--ease-out) 600ms both;
}
.sk-hero-scroll::after {
  content: "";
  position: absolute;
  top: 7px; left: 50%;
  width: 3px; height: 7px;
  margin-left: -1.5px;
  border-radius: 2px;
  background: var(--red-500);
  animation: sk-scroll-dot 2s var(--ease-out) infinite;
}
@keyframes sk-scroll-dot {
  0%   { transform: translateY(0); opacity: 1; }
  70%  { transform: translateY(12px); opacity: 0; }
  100% { transform: translateY(0); opacity: 0; }
}

/* ---------- Secciones ---------- */
.sk-section { padding: 100px 0; }

.sk-section-head { margin-bottom: 54px; }
.sk-section-title {
  display: flex;
  align-items: center;
  gap: 22px;
}
.sk-section-title .num {
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 600;
  color: var(--red-500);
  letter-spacing: 2px;
  flex: none;
}
.sk-section-title h2 {
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 700;
  letter-spacing: 1.5px;
  flex: none;
}
.sk-section-title .line {
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, var(--stroke-2), transparent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 900ms var(--ease-out) 250ms;
}
.sk-reveal.is-visible .sk-section-title .line { transform: scaleX(1); }
.sk-section-sub {
  margin: 14px 0 0;
  max-width: 620px;
  color: var(--text-mid);
}

/* ---------- Qué es GTASTARK ---------- */
.sk-about-grid {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 60px;
  align-items: center;
}
.sk-about-copy p { margin: 0 0 18px; }
.sk-about-copy p strong { color: var(--text-hi); font-weight: 600; }

.sk-about-points {
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 22px;
}
.sk-about-points li {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}
.sk-about-points .pt-icon {
  flex: none;
  width: 42px; height: 42px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--r-md);
  border: 1px solid var(--stroke-1);
  background: linear-gradient(180deg, var(--carbon-3), var(--carbon-2));
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.06);
  color: var(--red-500);
  transition: border-color var(--dur-2) var(--ease-out), transform var(--dur-2) var(--ease-out);
}
.sk-about-points li:hover .pt-icon {
  border-color: var(--stroke-red);
  transform: translateY(-2px);
}
.sk-about-points .pt-icon svg { width: 20px; height: 20px; }
.sk-about-points h3 {
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 1.5px;
  margin-bottom: 4px;
}
.sk-about-points p { margin: 0; font-size: 14.5px; }

.sk-about-media {
  position: relative;
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid var(--stroke-1);
  box-shadow: 0 24px 60px rgba(0,0,0,0.5);
  transition: border-color var(--dur-3) var(--ease-out), box-shadow var(--dur-3) var(--ease-out);
}
.sk-about-media::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.10);
  pointer-events: none;
}
.sk-about-media img {
  display: block;
  width: 100%;
  height: auto;
  transition: transform 700ms var(--ease-out);
}
.sk-about-media:hover { border-color: var(--stroke-red); box-shadow: 0 24px 60px rgba(0,0,0,0.5), 0 0 0 1px rgba(227,30,36,0.15); }
.sk-about-media:hover img { transform: scale(1.04); }

/* ---------- Cómo empezar ---------- */
.sk-steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  border-top: 1px solid var(--stroke-1);
}
.sk-step {
  position: relative;
  padding: 36px 32px 8px 32px;
  border-right: 1px solid var(--stroke-1);
  transition: background var(--dur-3) var(--ease-out);
}
.sk-step::before {
  content: "";
  position: absolute;
  top: -1px; left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--red-600), transparent);
  transition: width 450ms var(--ease-out);
}
.sk-step:hover::before { width: 100%; }
.sk-step:hover { background: rgba(255,255,255,0.015); }
.sk-step:first-child { padding-left: 0; }
.sk-step:first-child::before { left: 0; }
.sk-step:last-child { border-right: none; }
.sk-step-num {
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 2px;
  color: var(--red-500);
  margin-bottom: 16px;
  transition: color var(--dur-2) var(--ease-out);
}
.sk-step:hover .sk-step-num { color: var(--red-400); }
.sk-step h3 {
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 1.5px;
  margin-bottom: 10px;
}
.sk-step p { margin: 0; font-size: 14.5px; }
.sk-step p a { color: var(--text-hi); border-bottom: 1px solid var(--stroke-red); }
.sk-step p a:hover { color: var(--red-400); }

.sk-steps-cta { margin-top: 48px; }

/* ---------- Ecosistema ---------- */
.sk-eco-list {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}
.sk-eco-link {
  position: relative;
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 22px 24px;
  border-radius: var(--r-md);
  border: 1px solid var(--stroke-2);
  background: rgba(10,11,15,0.6);
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.05);
  transition: border-color var(--dur-2) var(--ease-out), transform var(--dur-2) var(--ease-out);
}
/* Corners tipo HUD */
.sk-eco-link::before,
.sk-eco-link::after {
  content: "";
  position: absolute;
  width: 14px; height: 14px;
  border: 2px solid transparent;
  transition: border-color var(--dur-2) var(--ease-out);
  pointer-events: none;
}
.sk-eco-link::before {
  top: -1px; left: -1px;
  border-right: none; border-bottom: none;
  border-top-left-radius: var(--r-md);
}
.sk-eco-link::after {
  bottom: -1px; right: -1px;
  border-left: none; border-top: none;
  border-bottom-right-radius: var(--r-md);
}
.sk-eco-link:hover { border-color: var(--stroke-red); transform: translateY(-3px); }
.sk-eco-link:hover::before,
.sk-eco-link:hover::after { border-color: var(--red-600); }
.sk-eco-link > svg { width: 22px; height: 22px; flex: none; color: var(--text-mid); transition: color var(--dur-2) var(--ease-out); }
.sk-eco-link:hover > svg { color: var(--red-400); }
.sk-eco-link .eco-name {
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--text-hi);
  display: block;
}
.sk-eco-link .eco-desc {
  font-size: 13px;
  color: var(--text-low);
  display: block;
  margin-top: 2px;
}

/* ---------- Footer ---------- */
.sk-footer {
  border-top: 1px solid var(--stroke-1);
  background: linear-gradient(180deg, rgba(11,13,18,0.6), rgba(5,6,10,0.9));
  padding: 64px 0 0;
}
.sk-footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
}
.sk-footer-brand img {
  height: 48px;
  width: auto;
  filter: drop-shadow(0 6px 16px rgba(227,30,36,0.25));
  margin-bottom: 20px;
}
.sk-footer-brand p {
  font-size: 13px;
  color: var(--text-low);
  max-width: 420px;
  margin: 0;
}
.sk-footer h4 {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 2px;
  color: var(--text-hi);
  margin-bottom: 18px;
}
.sk-footer-links {
  list-style: none;
  margin: 0; padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.sk-footer-links a {
  font-size: 14px;
  color: var(--text-mid);
  transition: color var(--dur-2) var(--ease-out), padding-left var(--dur-2) var(--ease-out);
}
.sk-footer-links a:hover { color: var(--red-400); padding-left: 4px; }

.sk-social {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}
.sk-social a {
  width: 42px; height: 42px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--r-md);
  border: 1px solid var(--stroke-2);
  background: rgba(10,11,15,0.6);
  color: var(--text-mid);
  transition: border-color var(--dur-2) var(--ease-out), color var(--dur-2) var(--ease-out), transform var(--dur-2) var(--ease-out);
}
.sk-social a:hover { border-color: var(--stroke-red); color: var(--red-400); transform: translateY(-2px); }
.sk-social svg { width: 18px; height: 18px; }

.sk-footer-bottom {
  border-top: 1px solid var(--stroke-1);
  padding: 22px 0;
}
.sk-footer-bottom .sk-container {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  justify-content: space-between;
  font-size: 13px;
  color: var(--text-low);
}
.sk-footer-bottom a { color: var(--text-mid); }
.sk-footer-bottom a:hover { color: var(--red-400); }

/* ---------- Reveal on scroll ---------- */
.sk-reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 600ms var(--ease-out), transform 600ms var(--ease-out);
}
.sk-reveal.is-visible { opacity: 1; transform: translateY(0); }
.sk-reveal[data-delay="1"] { transition-delay: 90ms; }
.sk-reveal[data-delay="2"] { transition-delay: 180ms; }
.sk-reveal[data-delay="3"] { transition-delay: 270ms; }

@media (prefers-reduced-motion: reduce) {
  .sk-hero-inner > *, .sk-hero-scroll { animation: none; }
  .sk-hero-bg-img { animation: none; }
  .sk-hero-scroll::after { animation: none; }
  .sk-reveal { opacity: 1; transform: none; transition: none; }
  .sk-section-title .line { transform: scaleX(1); transition: none; }
}

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .sk-nav { display: none; }
  .sk-header-cta { display: none; }
  .sk-mobile-toggle { display: flex; }
  .sk-header.is-menu-open { background: rgba(11,13,18,0.98); }

  .sk-about-grid { grid-template-columns: 1fr; gap: 44px; }
  .sk-eco-list { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 720px) {
  .sk-section { padding: 72px 0; }
  .sk-hero { padding: 110px 0 70px; }
  .sk-hero-scroll { display: none; }

  .sk-steps { grid-template-columns: 1fr; border-top: none; }
  .sk-step {
    border-right: none;
    border-top: 1px solid var(--stroke-1);
    padding: 28px 0 10px;
  }

  .sk-eco-list { grid-template-columns: 1fr; }
  .sk-footer-grid { grid-template-columns: 1fr; gap: 36px; }
  .sk-footer-bottom .sk-container { justify-content: center; text-align: center; }
}