:root {
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --text-lg: clamp(1.125rem, 1rem + 0.75vw, 1.5rem);
  --text-xl: clamp(1.5rem, 1.2rem + 1.25vw, 2.25rem);
  --text-2xl: clamp(2rem, 1.2rem + 2.5vw, 3.5rem);
  --text-hero: clamp(3.2rem, 1rem + 11vw, 9rem);

  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;

  --radius-full: 9999px;
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);
  --content-wide: 1140px;

  --font-display: 'Clash Display', 'Helvetica Neue', sans-serif;
  --font-body: 'Satoshi', 'Helvetica Neue', sans-serif;
}

:root, [data-theme='light'] {
  --color-bg: #f6f5f1;
  --color-text: #14130f;
  --color-text-muted: #6d6b64;
  --color-text-faint: #97958d;
  --color-border: #d3d0c8;
  --color-accent: #b3690b;
}

[data-theme='dark'] {
  --color-bg: #0e0e0c;
  --color-text: #f4f3ef;
  --color-text-muted: #9b9992;
  --color-text-faint: #6f6d66;
  --color-border: #2d2c29;
  --color-accent: #f2b33d;
}

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

html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-size-adjust: none;
  scroll-behavior: smooth;
}

body {
  min-height: 100dvh;
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.55;
  color: var(--color-text);
  background: var(--color-bg);
}

a { color: inherit; text-decoration: none; }
button { cursor: pointer; background: none; border: none; color: inherit; }
svg { display: block; }

:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 4px; }

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border-width: 0;
}

/* ---------- header ---------- */
.bar {
  max-width: var(--content-wide);
  margin: 0 auto;
  padding: var(--space-6) var(--space-6) 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  font-weight: 900;
  font-size: var(--text-sm);
  letter-spacing: 0.22em;
}
.brand .mark { color: var(--color-accent); }

.toggle {
  width: 40px; height: 40px;
  display: grid; place-items: center;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  color: var(--color-text-muted);
  transition: color var(--transition-interactive), border-color var(--transition-interactive);
}
.toggle:hover { color: var(--color-text); border-color: var(--color-text-muted); }

/* ---------- hero ---------- */
main {
  max-width: var(--content-wide);
  margin: 0 auto;
  padding: clamp(var(--space-10), 6vw, var(--space-20)) var(--space-6) var(--space-16);
}

.headline {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-hero);
  line-height: 0.86;
  letter-spacing: -0.03em;
  text-transform: uppercase;
  display: flex;
  flex-wrap: wrap;
  gap: 0 0.28em;
}
.headline .accent { color: var(--color-accent); }

.sub {
  margin-top: var(--space-6);
  font-size: var(--text-lg);
  font-weight: 500;
  color: var(--color-text-muted);
  max-width: 34ch;
}

/* ---------- options ---------- */
.options {
  margin-top: clamp(var(--space-12), 7vw, var(--space-20));
  display: grid;
  gap: var(--space-4);
  grid-template-columns: 1fr;
}
@media (min-width: 860px) {
  .options { grid-template-columns: 1fr 1fr; gap: var(--space-8); }
}

.option {
  display: flex;
  align-items: center;
  gap: clamp(var(--space-4), 3vw, var(--space-8));
  padding: var(--space-8) var(--space-6);
  border-top: 2px solid var(--color-border);
  transition: border-color var(--transition-interactive);
}
.option:hover { border-color: var(--color-accent); }

.play {
  flex: 0 0 auto;
  width: clamp(74px, 13vw, 116px);
  color: var(--color-accent);
}
.play .ring {
  fill: none;
  stroke: currentColor;
  stroke-width: 5;
  opacity: 0.55;
  transition: opacity var(--transition-interactive);
}
.play .tri { fill: currentColor; }
.option:hover .play .ring { opacity: 1; }

.meta { display: flex; flex-direction: column; gap: var(--space-2); }

.len {
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--color-text-faint);
}

.ttl {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-xl);
  line-height: 1;
  letter-spacing: -0.01em;
  text-transform: uppercase;
}

.dek {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  max-width: 34ch;
}

/* ---------- links ---------- */
.links {
  margin-top: clamp(var(--space-12), 8vw, var(--space-20));
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3) clamp(var(--space-6), 4vw, var(--space-12));
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--text-lg);
  text-transform: lowercase;
}
.links a {
  padding-bottom: 2px;
  border-bottom: 2px solid var(--color-border);
  transition: color var(--transition-interactive), border-color var(--transition-interactive);
}
.links a:hover { color: var(--color-accent); border-color: var(--color-accent); }

/* ---------- definition ---------- */
.define {
  margin-top: clamp(var(--space-12), 8vw, var(--space-20));
  padding-top: var(--space-8);
  border-top: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  color: var(--color-text-faint);
  filter: grayscale(1);
}
.def { font-size: var(--text-base); max-width: 52ch; }
.def b { font-weight: 700; color: var(--color-text-muted); }
.def i { font-style: italic; }
.claim { font-size: var(--text-base); color: var(--color-text-muted); }
.ask {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-xl);
  text-transform: uppercase;
  color: var(--color-text-muted);
  letter-spacing: -0.01em;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}