/* =========================================================
   REZU — LUXROBO-style base (black, pretendard, minimal)
   ========================================================= */

*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: "Pretendard Variable", Pretendard, -apple-system, BlinkMacSystemFont, system-ui, "Noto Sans KR", sans-serif;
  background: #000;
  color: #fff;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-feature-settings: "ss01", "ss02";
  line-height: 1.5;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; background: none; border: 0; cursor: pointer; color: inherit; padding: 0; }

:root {
  --bg: #000000;
  --bg-2: #0a0a0a;
  --bg-3: #141414;
  --fg: #ffffff;
  --fg-2: rgba(255,255,255,0.72);
  --fg-3: rgba(255,255,255,0.48);
  --fg-4: rgba(255,255,255,0.28);
  --line: rgba(255,255,255,0.12);
  --line-strong: rgba(255,255,255,0.22);
  --accent: #ffffff;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);

  --font-sans: "Pretendard Variable", Pretendard, -apple-system, BlinkMacSystemFont, system-ui, "Noto Sans KR", sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, monospace;
}

.container {
  width: min(1440px, 92vw);
  margin: 0 auto;
}

/* Section label — small uppercase tag */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--fg-3);
}
.eyebrow::before {
  content: "";
  width: 28px; height: 1px;
  background: var(--fg-3);
}

/* Headline scale — LUXROBO-ish: ultra-large, tight, sans */
.h-display {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: clamp(56px, 10vw, 180px);
  line-height: 0.95;
  letter-spacing: -0.045em;
  margin: 0;
}
.h-1 {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: clamp(44px, 6.5vw, 112px);
  line-height: 1;
  letter-spacing: -0.035em;
  margin: 0;
}
.h-2 {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: clamp(30px, 3.4vw, 56px);
  line-height: 1.1;
  letter-spacing: -0.025em;
  margin: 0;
}
.h-3 {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: clamp(20px, 1.6vw, 26px);
  line-height: 1.3;
  letter-spacing: -0.015em;
  margin: 0;
}
.body-lg { font-size: 18px; line-height: 1.7; color: var(--fg-2); font-weight: 400; }
.body    { font-size: 15.5px; line-height: 1.7; color: var(--fg-2); font-weight: 400; }
.body-sm { font-size: 13.5px; line-height: 1.6; color: var(--fg-3); font-weight: 400; }
.mono-tag {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
}

/* Reveal */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity 1s var(--ease), transform 1s var(--ease); }
.reveal.in { opacity: 1; transform: none; }
.reveal.d1 { transition-delay: 0.08s; }
.reveal.d2 { transition-delay: 0.16s; }
.reveal.d3 { transition-delay: 0.24s; }
.reveal.d4 { transition-delay: 0.32s; }

/* Reveal variants */
.reveal-left { opacity: 0; transform: translateX(-40px); transition: opacity 1s var(--ease), transform 1s var(--ease); }
.reveal-left.in { opacity: 1; transform: none; }
.reveal-right { opacity: 0; transform: translateX(40px); transition: opacity 1s var(--ease), transform 1s var(--ease); }
.reveal-right.in { opacity: 1; transform: none; }
.reveal-scale { opacity: 0; transform: scale(0.92); transition: opacity 1s var(--ease), transform 1s var(--ease); }
.reveal-scale.in { opacity: 1; transform: none; }
.reveal-left.d1, .reveal-right.d1, .reveal-scale.d1 { transition-delay: 0.08s; }
.reveal-left.d2, .reveal-right.d2, .reveal-scale.d2 { transition-delay: 0.16s; }
.reveal-left.d3, .reveal-right.d3, .reveal-scale.d3 { transition-delay: 0.24s; }
.reveal-left.d4, .reveal-right.d4, .reveal-scale.d4 { transition-delay: 0.32s; }

/* Scroll progress bar */
.scroll-progress {
  position: fixed;
  top: 0; left: 0;
  height: 2px;
  background: linear-gradient(90deg, #fff, #5b5bff);
  z-index: 9999;
  transform-origin: left;
  transform: scaleX(0);
  will-change: transform;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  padding: 18px 28px;
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: -0.005em;
  color: #fff;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  transition: background 0.35s var(--ease), color 0.35s var(--ease), border-color 0.35s var(--ease);
}
.btn .arr {
  width: 16px; height: 10px; position: relative;
}
.btn .arr::before {
  content: ""; position: absolute; left: 0; right: 0; top: 4px;
  height: 1px; background: currentColor;
}
.btn .arr::after {
  content: ""; position: absolute; right: 0; top: 1px;
  width: 8px; height: 8px;
  border-top: 1px solid currentColor;
  border-right: 1px solid currentColor;
  transform: rotate(45deg);
}
.btn:hover { background: #fff; color: #000; border-color: #fff; }
.btn.primary { background: #fff; color: #000; border-color: #fff; }
.btn.primary:hover { background: transparent; color: #fff; border-color: #fff; }

/* Section wrapper */
section { position: relative; }
.sec-pad { padding: 180px 0; }
@media (max-width: 900px) {
  .sec-pad { padding: 120px 0; }
}