@import url('https://fonts.googleapis.com/css2?family=Shippori+Mincho:wght@400;700&family=Space+Mono:wght@400;700&display=swap');

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

:root {
  --ink:    #0f0e0d;
  --paper:  #f4f0e8;
  --drop:   #1a3a5c;
  --accent: #c8a96e;
  --muted:  #8a8480;
}

html { scroll-behavior: smooth; }

body {
  min-height: 100vh;
  background: var(--paper);
  color: var(--ink);
  font-family: 'Shippori Mincho', serif;
}

/* noise texture */
body::before {
  content: '';
  position: fixed; inset: 0; z-index: 0; pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='300' height='300'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='300' height='300' filter='url(%23n)' opacity='0.035'/%3E%3C/svg%3E");
}

.wrap { position: relative; z-index: 1; max-width: 680px; margin: 0 auto; padding: 0 28px; }

/* ── nav ── */
nav {
  display: flex; align-items: center; justify-content: space-between;
  padding: 28px 0; border-bottom: 1px solid rgba(15,14,13,0.1);
}
.nav-logo {
  font-family: 'Space Mono', monospace;
  font-size: 13px; letter-spacing: 0.2em; color: var(--ink); text-decoration: none;
}
.nav-links { display: flex; gap: 28px; }
.nav-links a {
  font-family: 'Space Mono', monospace; font-size: 10px;
  letter-spacing: 0.2em; color: var(--muted); text-decoration: none;
  text-transform: uppercase; transition: color 0.2s;
}
.nav-links a:hover { color: var(--ink); }

/* ── hero ── */
.hero { padding: 96px 0 80px; }
.hero-label {
  font-family: 'Space Mono', monospace; font-size: 10px;
  letter-spacing: 0.3em; color: var(--accent); text-transform: uppercase; margin-bottom: 32px;
}
.hero h1 {
  font-size: clamp(2.4rem, 9vw, 4.2rem); font-weight: 700;
  line-height: 1.2; letter-spacing: 0.01em; margin-bottom: 32px;
}
.hero h1 em { font-style: normal; color: var(--drop); }
.hero p {
  font-size: 1.1rem; line-height: 2.1; color: #4a4540; max-width: 480px; margin-bottom: 48px;
}
.btn {
  display: inline-block; font-family: 'Space Mono', monospace;
  font-size: 11px; letter-spacing: 0.2em; text-transform: uppercase;
  color: var(--ink); text-decoration: none; border: 1px solid var(--ink);
  padding: 14px 28px; transition: background 0.2s, color 0.2s;
}
.btn:hover { background: var(--ink); color: var(--paper); }
.btn-ghost { background: transparent; }

/* ── section ── */
.section { padding: 80px 0; border-top: 1px solid rgba(15,14,13,0.08); }
.section-label {
  font-family: 'Space Mono', monospace; font-size: 10px;
  letter-spacing: 0.3em; color: var(--muted); text-transform: uppercase; margin-bottom: 40px;
}
.section h2 { font-size: clamp(1.6rem, 5vw, 2.4rem); font-weight: 700; line-height: 1.3; margin-bottom: 24px; }
.section p  { font-size: 1rem; line-height: 2.1; color: #4a4540; max-width: 520px; margin-bottom: 32px; }

/* ── layer list ── */
.layers { display: flex; flex-direction: column; gap: 0; margin: 40px 0; }
.layer {
  display: flex; align-items: flex-start; gap: 24px;
  padding: 24px 0; border-bottom: 1px solid rgba(15,14,13,0.08);
}
.layer-num {
  font-family: 'Space Mono', monospace; font-size: 10px;
  color: var(--accent); letter-spacing: 0.1em; padding-top: 4px; flex-shrink: 0;
}
.layer-title { font-size: 1.05rem; font-weight: 700; margin-bottom: 6px; }
.layer-desc  { font-size: 0.9rem; line-height: 1.8; color: #6a6560; }

/* ── drop block ── */
.drop-block {
  border-left: 3px solid var(--drop); padding: 24px 28px;
  margin: 40px 0; background: rgba(26,58,92,0.04);
}
.drop-label {
  font-family: 'Space Mono', monospace; font-size: 10px;
  letter-spacing: 0.25em; color: var(--drop); margin-bottom: 12px;
}
.drop-block p { font-size: 0.95rem; line-height: 2; color: #3a3632; }

/* ── footer ── */
footer {
  padding: 48px 0; border-top: 1px solid rgba(15,14,13,0.1);
  display: flex; justify-content: space-between; align-items: center;
  font-family: 'Space Mono', monospace; font-size: 10px;
  letter-spacing: 0.15em; color: var(--muted);
}

/* ── fade in ── */
.fade { opacity: 0; transform: translateY(20px); animation: rise 0.9s forwards; }
.fade:nth-child(1) { animation-delay: 0.1s; }
.fade:nth-child(2) { animation-delay: 0.25s; }
.fade:nth-child(3) { animation-delay: 0.4s; }
.fade:nth-child(4) { animation-delay: 0.55s; }
.fade:nth-child(5) { animation-delay: 0.7s; }
@keyframes rise { to { opacity: 1; transform: none; } }

@media (max-width: 480px) {
  nav { flex-direction: column; gap: 16px; align-items: flex-start; }
  footer { flex-direction: column; gap: 12px; }
}