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

:root {
  --bg:                  #f0efed;
  --bg-2:                #ffffff;
  --text:                #111111;
  --text-2:              #555555;
  --text-3:              #999999;
  --border:              rgba(0,0,0,0.10);
  --border-2:            rgba(0,0,0,0.18);
  --drum-bg:             #e8e7e4;
  --drum-inactive:       #aaaaaa;
  --drum-active:         #111111;
  --selector-border:     rgba(0,0,0,0.18);
  --fade-top:            linear-gradient(to bottom, #e8e7e4, transparent);
  --fade-bottom:         linear-gradient(to top,   #e8e7e4, transparent);
  --tag-bg:              rgba(0,0,0,0.06);
  --tag-text:            #555555;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg:                #000000;
    --bg-2:              #1a1a1a;
    --text:              #ffffff;
    --text-2:            #888888;
    --text-3:            #555555;
    --border:            rgba(255,255,255,0.08);
    --border-2:          rgba(255,255,255,0.14);
    --drum-bg:           #141414;
    --drum-inactive:     #444444;
    --drum-active:       #ffffff;
    --selector-border:   rgba(255,255,255,0.14);
    --fade-top:          linear-gradient(to bottom, #141414, transparent);
    --fade-bottom:       linear-gradient(to top,   #141414, transparent);
    --tag-bg:            rgba(255,255,255,0.06);
    --tag-text:          #888888;
  }
}

/* ── BASE ── */

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'DM Mono', monospace;
  font-weight: 300;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* ── HEADER ── */

header {
  padding: 3rem 2rem 0;
  max-width: 900px;
  margin: 0 auto;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.logo {
  font-family: 'DM Serif Display', serif;
  font-size: clamp(1.6rem, 5vw, 2.4rem);
  color: var(--text);
  letter-spacing: -0.01em;
  text-decoration: none;
}

.logo sup {
  font-family: 'DM Mono', monospace;
  font-size: 0.5em;
  font-weight: 300;
  vertical-align: super;
  color: var(--text-2);
  letter-spacing: 0;
}

.tagline {
  font-size: 0.7rem;
  color: var(--text-3);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  align-self: center;
}

/* ── HERO ── */

.hero {
  max-width: 900px;
  margin: 0 auto;
  padding: 5rem 2rem 3rem;
  border-bottom: 0.5px solid var(--border);
}

.hero-eyebrow {
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-3);
  margin-bottom: 1.5rem;
}

.hero-title {
  font-family: 'DM Serif Display', serif;
  font-size: clamp(2.2rem, 7vw, 4.5rem);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--text);
  max-width: 680px;
  margin-bottom: 2rem;
}

.hero-title em {
  font-style: italic;
  color: var(--text-2);
}

.hero-body {
  font-size: 0.85rem;
  line-height: 1.8;
  color: var(--text-2);
  max-width: 480px;
}

/* ── INTERACTION BLOCK ──
   Duplicate this block (including its inner .interaction-stage)
   for each new interaction you want to add.
   ─────────────────────────────────────────── */

.interaction-block {
  max-width: 900px;
  margin: 0 auto;
  padding: 5rem 2rem;
  border-bottom: 0.5px solid var(--border);
}

.interaction-meta {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

.interaction-index {
  font-size: 0.6rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-3);
}

.interaction-tag {
  font-size: 0.6rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  background: var(--tag-bg);
  color: var(--tag-text);
  padding: 3px 8px;
  border-radius: 2px;
}

.interaction-heading {
  font-family: 'DM Serif Display', serif;
  font-size: clamp(1.5rem, 4vw, 2.5rem);
  letter-spacing: -0.015em;
  line-height: 1.15;
  color: var(--text);
  margin-bottom: 0.75rem;
  max-width: 560px;
}

.interaction-subheading {
  font-size: 0.82rem;
  line-height: 1.75;
  color: var(--text-2);
  max-width: 520px;
  margin-bottom: 3rem;
}

.interaction-stage {
  background: var(--bg-2);
  border: 0.5px solid var(--border);
  border-radius: 16px;
  padding: 2.5rem 2rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2rem;
}

.interaction-caption {
  font-size: 0.7rem;
  color: var(--text-3);
  letter-spacing: 0.06em;
  text-align: center;
  max-width: 420px;
  line-height: 1.7;
  margin-top: 1.5rem;
}

/* ── YEAR PICKER ── */

.picker-shell {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
  width: 100%;
  max-width: 360px;
}

.picker-label-row {
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-3);
  align-self: flex-start;
}

.picker-drums {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
}

.drum-col {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.drum-col-label {
  font-size: 0.6rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-3);
  text-align: center;
}

.drum {
  position: relative;
  height: 200px;
  overflow: hidden;
  border-radius: 10px;
  border: 0.5px solid var(--border);
  background: var(--drum-bg);
  cursor: ns-resize;
  user-select: none;
  touch-action: none;
}

.drum-inner {
  position: absolute;
  width: 100%;
}

.drum-item {
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'DM Mono', monospace;
  font-size: 1.1rem;
  font-weight: 300;
  color: var(--drum-inactive);
  transition: color 0.12s, font-size 0.12s;
}

.drum-item.active {
  color: var(--drum-active);
  font-size: 1.4rem;
  font-weight: 400;
}

.drum::before,
.drum::after {
  content: '';
  position: absolute;
  left: 0; right: 0;
  height: 72px;
  z-index: 2;
  pointer-events: none;
}
.drum::before { top: 0;    background: var(--fade-top); }
.drum::after  { bottom: 0; background: var(--fade-bottom); }

.drum-selector {
  position: absolute;
  top: 50%;
  left: 10px; right: 10px;
  height: 40px;
  transform: translateY(-50%);
  border-radius: 6px;
  border: 0.5px solid var(--selector-border);
  z-index: 1;
  pointer-events: none;
}

.drum-sep {
  font-family: 'DM Mono', monospace;
  font-size: 1.2rem;
  color: var(--text-3);
  padding-top: 26px;
  flex-shrink: 0;
}

.picker-result {
  display: flex;
  align-items: baseline;
  gap: 10px;
  align-self: flex-start;
}

.picker-result-year {
  font-family: 'DM Serif Display', serif;
  font-size: 2.8rem;
  color: var(--text);
  letter-spacing: -0.02em;
  line-height: 1;
}

.picker-result-note {
  font-size: 0.75rem;
  color: var(--text-3);
}

/* ── FOOTER ── */

footer {
  max-width: 900px;
  margin: 0 auto;
  padding: 3rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-logo {
  font-family: 'DM Serif Display', serif;
  font-size: 1rem;
  color: var(--text-3);
  text-decoration: none;
}

.footer-copy {
  font-size: 0.65rem;
  color: var(--text-3);
  letter-spacing: 0.08em;
}

/* ── RESPONSIVE ── */

@media (max-width: 560px) {
  header               { padding: 2rem 1.25rem 0; }
  .hero                { padding: 3rem 1.25rem 2.5rem; }
  .interaction-block   { padding: 3.5rem 1.25rem; }
  .interaction-stage   { padding: 1.75rem 1.25rem; }
  footer               { padding: 2.5rem 1.25rem; }
}