/* ============================================================
   HIIT & RUN — HYBRID RACE  ·  Design System
   Colors: #F5FF00 yellow · #0D0D0D / #111111 near-black · #1A1A1A gray
           #FFFFFF white · #AAAAAA secondary text
   Type:   Bebas Neue (headings) · Inter (body)
   ============================================================ */

:root {
  --yellow:      #F5FF00;
  --black:       #0D0D0D;
  --black-alt:   #111111;
  --gray:        #1A1A1A;
  --gray-line:   #333333;
  --gray-line-2: #222222;
  --white:       #FFFFFF;
  --text-2:      #AAAAAA;

  --maxw: 1280px;
  --gutter: clamp(24px, 5vw, 80px);

  --ease: cubic-bezier(0.16, 1, 0.3, 1);

  --head: "Bebas Neue", "Arial Narrow", sans-serif;
  --body: "Inter", system-ui, sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 84px; }

body {
  background: var(--black);
  color: var(--white);
  font-family: var(--body);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }

::selection { background: var(--yellow); color: #000; }

/* ---------- Typography ---------- */
.h-display {
  font-family: var(--head);
  font-weight: 400;
  line-height: 0.92;
  letter-spacing: 2px;
  text-transform: uppercase;
}
h1, h2, h3 { font-family: var(--head); font-weight: 400; text-transform: uppercase; line-height: 0.95; }

.eyebrow {
  font-family: var(--body);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--yellow);
  display: inline-flex;
  align-items: center;
  gap: 12px;
}
.eyebrow::before {
  content: "";
  width: 34px; height: 2px;
  background: var(--yellow);
  display: inline-block;
}

.text-yellow { color: var(--yellow); }
.text-2 { color: var(--text-2); }

/* ---------- Layout ---------- */
.section { padding: clamp(80px, 11vh, 160px) 0; position: relative; }
.container { max-width: var(--maxw); margin: 0 auto; padding: 0 var(--gutter); }
.bg-black { background: var(--black); }
.bg-black-alt { background: var(--black-alt); }
.bg-gray { background: var(--gray); }

.section-head { margin-bottom: 64px; }
.section-head.center { text-align: center; }
.section-head.center .eyebrow { justify-content: center; }
.section-head h2 {
  font-size: clamp(48px, 6.5vw, 80px);
  letter-spacing: 2px;
  margin-top: 22px;
}
.section-head .sub {
  color: var(--text-2);
  font-size: 18px;
  max-width: 620px;
  margin: 18px 0 0;
}
.section-head.center .sub { margin-left: auto; margin-right: auto; }

/* ---------- Buttons ---------- */
.btn {
  --bg: var(--yellow);
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 18px 42px;
  font-family: var(--body);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  border-radius: 0;
  border: 2px solid var(--yellow);
  background: var(--bg);
  color: #000;
  transition: background .3s var(--ease), color .3s var(--ease), border-color .3s var(--ease), transform .2s var(--ease);
  white-space: nowrap;
}
.btn:hover { background: var(--white); border-color: var(--white); transform: translateY(-2px); }
.btn .arr { transition: transform .3s var(--ease); }
.btn:hover .arr { transform: translateX(4px); }

.btn--ghost {
  background: transparent;
  color: var(--yellow);
  border-color: var(--yellow);
}
.btn--ghost:hover { background: var(--yellow); color: #000; border-color: var(--yellow); }

.btn--lg { padding: 22px 52px; font-size: 14px; }

/* utility reveal */
.reveal { opacity: 0; transform: translateY(34px); transition: opacity .8s var(--ease), transform .8s var(--ease); }
.reveal.in { opacity: 1; transform: none; }
.reveal.d1 { transition-delay: .08s; }
.reveal.d2 { transition-delay: .16s; }
.reveal.d3 { transition-delay: .24s; }
.reveal.d4 { transition-delay: .32s; }

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}