/* GTO Range — landing page, dark theme matching vibe-page family */

:root {
  --bg:        #050505;
  --bg-2:      #0c0c0c;
  --bg-3:      #141414;
  --fg:        #ffffff;
  --fg-dim:    rgba(255,255,255,0.72);
  --fg-mute:   rgba(255,255,255,0.40);
  --line:      rgba(255,255,255,0.10);
  --accent:    #f5c542;
  --accent-2:  #34d399;
  --warn:      #f87171;
  --serif:     "New York", ui-serif, Georgia, serif;
  --sans:      -apple-system, BlinkMacSystemFont, "Inter", "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", sans-serif;
  --mono:      ui-monospace, "SF Mono", "JetBrains Mono", Menlo, monospace;
  --maxw:      1080px;
  --section-y: clamp(64px, 9vh, 120px);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: geometricPrecision;
}
a { color: inherit; text-decoration: none; }
em { font-style: italic; color: var(--accent); font-family: var(--serif); font-weight: 500; }
strong { color: var(--fg); font-weight: 600; }
img { display: block; max-width: 100%; }

.grain {
  position: fixed; inset: 0; pointer-events: none; z-index: 0;
  background-image:
    radial-gradient(ellipse at top, rgba(245,197,66,0.06), transparent 50%),
    radial-gradient(ellipse at bottom, rgba(52,211,153,0.04), transparent 50%);
}

.nav {
  position: relative; z-index: 10;
  display: flex; justify-content: space-between; align-items: center;
  max-width: var(--maxw); margin: 0 auto;
  padding: 24px clamp(16px, 4vw, 32px);
}
.brand { font-size: 14px; color: var(--fg-mute); font-weight: 500; }
.brand:hover { color: var(--fg); }
.nav-links { display: flex; gap: 24px; font-size: 14px; }
.nav-links a { color: var(--fg-mute); }
.nav-links a:hover { color: var(--fg); }

main {
  position: relative; z-index: 1;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 clamp(16px, 4vw, 32px);
}

section { padding: var(--section-y) 0; }
section + section { border-top: 1px solid var(--line); }

h2 {
  font-family: var(--serif);
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 500;
  margin-bottom: clamp(32px, 5vw, 56px);
  letter-spacing: -0.02em;
}

.hero {
  text-align: center;
  padding: clamp(40px, 8vh, 100px) 0 var(--section-y);
}
.hero-icon {
  width: clamp(96px, 16vw, 144px);
  height: clamp(96px, 16vw, 144px);
  margin: 0 auto 28px;
  border-radius: 24%;
  box-shadow: 0 8px 32px rgba(0,0,0,0.5), 0 0 0 1px var(--line);
}
.hero h1 {
  font-family: var(--serif);
  font-size: clamp(48px, 9vw, 84px);
  font-weight: 500;
  letter-spacing: -0.03em;
  line-height: 1.05;
  margin-bottom: 16px;
}
.tagline {
  font-size: clamp(18px, 2.4vw, 24px);
  color: var(--fg-dim);
  margin-bottom: 12px;
  max-width: 640px;
  margin-left: auto;
  margin-right: auto;
}
.hero-sub {
  font-size: clamp(15px, 1.8vw, 17px);
  color: var(--fg-mute);
  max-width: 680px;
  margin: 0 auto 36px;
}
.cta-row {
  display: flex; gap: 16px; justify-content: center; flex-wrap: wrap;
}
.cta-primary, .cta-secondary {
  display: inline-block;
  padding: 14px 24px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  transition: all 0.2s;
}
.cta-primary {
  background: var(--accent);
  color: #1a1a1a;
}
.cta-primary:hover { transform: translateY(-1px); box-shadow: 0 8px 24px rgba(245,197,66,0.3); }
.cta-secondary {
  border: 1px solid var(--line);
  color: var(--fg-dim);
}
.cta-secondary:hover { border-color: var(--fg-mute); color: var(--fg); }

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}
.feature-card {
  padding: 28px 24px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--bg-2);
  transition: border-color 0.2s, transform 0.2s;
}
.feature-card:hover {
  border-color: rgba(245,197,66,0.3);
  transform: translateY(-2px);
}
.feature-card h3 {
  font-size: 18px;
  margin-bottom: 12px;
  color: var(--accent);
  font-weight: 600;
}
.feature-card p {
  color: var(--fg-dim);
  font-size: 15px;
  line-height: 1.6;
}

.screenshot-row {
  display: flex;
  gap: 20px;
  justify-content: center;
  flex-wrap: wrap;
}
.screenshot-row img {
  width: clamp(220px, 28vw, 320px);
  height: auto;
  border-radius: 36px;
  box-shadow: 0 12px 48px rgba(0,0,0,0.6), 0 0 0 1px var(--line);
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 24px;
}
.stat {
  text-align: center;
  padding: 24px 16px;
  border: 1px solid var(--line);
  border-radius: 12px;
}
.stat strong {
  display: block;
  font-family: var(--serif);
  font-size: clamp(36px, 6vw, 56px);
  font-weight: 500;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 8px;
  letter-spacing: -0.02em;
}
.stat span {
  font-size: 13px;
  color: var(--fg-mute);
}

.caveat {
  max-width: 720px; margin: 0 auto;
}
.caveat h2 { font-size: clamp(22px, 3vw, 28px); }
.caveat p { color: var(--fg-dim); font-size: 16px; }

.site-footer {
  text-align: center;
  padding: 56px 0 80px;
  color: var(--fg-mute);
  font-size: 14px;
  border-top: 1px solid var(--line);
}
.site-footer a { color: var(--fg-dim); }
.site-footer a:hover { color: var(--fg); }
.footer-links {
  margin-top: 8px;
  font-size: 13px;
}

@media (max-width: 640px) {
  .nav-links { gap: 16px; }
}