/* ============================================================
   FOUNDATION — locked design tokens
   Type:    Fraunces (display) · Inter (body) · JetBrains Mono (accent)
   Palette: yerin-rose — sampled from Yerin Baek,
            "Every letter I sent you."
   ============================================================ */

:root {
  /* type */
  --font-display: "Fraunces", serif;
  --font-body: "Inter", sans-serif;
  --font-mono: "JetBrains Mono", monospace;

  /* fluid type scale */
  --step--1: clamp(0.8rem, 0.75rem + 0.2vw, 0.9rem);
  --step-0: clamp(1rem, 0.95rem + 0.25vw, 1.15rem);
  --step-1: clamp(1.4rem, 1.2rem + 1vw, 1.95rem);
  --step-2: clamp(2rem, 1.6rem + 2vw, 3rem);
  --step-3: clamp(3rem, 2rem + 5vw, 6rem);
  --step-4: clamp(4.5rem, 3rem + 9vw, 11rem);

  /* palette — yerin-rose */
  --bg: #f8f1e6;
  --surface: #fdf9f1;
  --text: #3a382f;
  --muted: #8c8374;
  --accent: #b07a64; /* warm dusty rose (primary) */
  --contrast: #3c78d2; /* cool complementary blue — for emphasis/interaction */
  --line: rgba(58, 56, 47, 0.12);

  /* motion */
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --dur: 0.6s;

  /* layout */
  --space: clamp(1.5rem, 1rem + 3vw, 5rem);
  --maxw: 1400px;
  --radius: 2px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: var(--step-0);
  line-height: 1.6;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

/* subtle film grain — matches the album's texture, very low opacity */
.grain {
  position: fixed;
  inset: 0;
  z-index: 999;
  pointer-events: none;
  opacity: 0.04;
  mix-blend-mode: multiply;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ---- shared layout ---- */
.wrap {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 var(--space);
}

/* ---- type helpers ---- */
.eyebrow {
  font-family: var(--font-mono);
  font-size: var(--step--1);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
}

.mono {
  font-family: var(--font-mono);
  font-size: var(--step--1);
  letter-spacing: 0.05em;
  color: var(--muted);
}

/* ---- motion primitives ---- */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition:
    opacity 0.9s var(--ease-out),
    transform 0.9s var(--ease-out);
}
.reveal.in {
  opacity: 1;
  transform: none;
}

.stagger > * {
  opacity: 0;
  transform: translateY(20px);
  transition:
    opacity 0.7s var(--ease-out),
    transform 0.7s var(--ease-out);
}
.stagger.in > * {
  opacity: 1;
  transform: none;
}
.stagger.in > *:nth-child(2) {
  transition-delay: 0.08s;
}
.stagger.in > *:nth-child(3) {
  transition-delay: 0.16s;
}
.stagger.in > *:nth-child(4) {
  transition-delay: 0.24s;
}
.stagger.in > *:nth-child(5) {
  transition-delay: 0.32s;
}

/* respect reduced-motion: no transforms, instant reveal */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  .reveal,
  .stagger > * {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }
}