.s1 { padding: clamp(64px, 9vh, 104px) var(--mlp-section-gutter, clamp(20px, 4vw, 64px)); }
.s1-inner { max-width: 1080px; margin: 0 auto; display: flex; flex-direction: column; gap: clamp(28px, 3.6vh, 40px); }

/* ── Head: copy left, one big number right ── */
.s1-head { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 24px 48px; align-items: end; }
.s1-head-copy { display: flex; flex-direction: column; align-items: flex-start; gap: 14px; min-width: 0; }
.s1-title {
  font-family: Poppins, system-ui, sans-serif;
  font-size: clamp(2.2rem, 3vw + 1rem, 3.6rem); line-height: 1; letter-spacing: -0.035em;
  font-weight: 700; margin: 0; color: var(--mel-text-primary);
}
.s1-eli5 { margin: 0; max-width: 44ch; font-size: clamp(16px, 1.5vw, 18px); line-height: 1.5; color: var(--mel-text-secondary); }
.s1-head-figure { display: flex; flex-direction: column; align-items: flex-end; gap: 6px; padding-bottom: 4px; }
.s1-x {
  font-family: Poppins, system-ui, sans-serif; font-weight: 700; line-height: 0.9;
  font-size: clamp(3.4rem, 6vw, 5.6rem); letter-spacing: -0.05em; font-variant-numeric: tabular-nums;
  background: linear-gradient(100deg, var(--s1-a1), var(--s1-a2));
  -webkit-background-clip: text; background-clip: text; color: transparent;
  padding-right: 0.04em;
}
.s1-x em { font-style: normal; font-size: 0.55em; margin-left: 2px; }
.s1-x-label { font-size: 12.5px; line-height: 1.4; color: var(--mel-text-muted); text-align: right; max-width: 24ch; }

/* ── Trace ── */
.s1-trace {
  margin: 0; border-top: 1px solid var(--s1-line); border-bottom: 1px solid var(--s1-line);
  padding: 18px 0 14px; display: flex; flex-direction: column; gap: 16px;
}
.s1-trace-top { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; }
.s1-trace-cap { font-size: 13px; color: var(--mel-text-secondary); }
.s1-trace-clock {
  font-family: 'JetBrains Mono', ui-monospace, monospace; font-variant-numeric: tabular-nums;
  font-size: 13px; color: var(--mel-text-primary); min-width: 7ch; text-align: right;
}

.s1-plot { position: relative; display: flex; flex-direction: column; gap: 10px; padding-bottom: 24px; }
/* Everything that lives on the time axis starts after the 150px label column. */
.s1-overlay, .s1-axis { position: absolute; left: 150px; right: 0; pointer-events: none; }
.s1-overlay { top: -6px; bottom: 20px; }
.s1-axis { bottom: 0; height: 14px; }
.s1-gridline { position: absolute; top: 0; bottom: 0; width: 1px; background: var(--s1-grid); }
.s1-playhead { position: absolute; top: 0; bottom: 0; width: 1.5px; margin-left: -0.75px; background: var(--mel-text-primary); opacity: 0.4; }
.s1-axis span {
  position: absolute; bottom: 0; transform: translateX(-50%); white-space: nowrap;
  font-family: 'JetBrains Mono', ui-monospace, monospace; font-size: 10px; color: var(--mel-text-muted);
}
.s1-axis span:first-child { transform: none; }
.s1-axis span:last-child { transform: translateX(-100%); }

.s1-row { display: grid; grid-template-columns: 150px minmax(0, 1fr); align-items: center; }
.s1-row-who { display: flex; flex-direction: column; gap: 1px; padding-right: 14px; min-width: 0; }
.s1-row-name { font-size: 14px; font-weight: 600; color: var(--mel-text-secondary); }
.s1-row--fast .s1-row-name { color: var(--mel-text-primary); }
.s1-row-meta { font-family: 'JetBrains Mono', ui-monospace, monospace; font-size: 10.5px; color: var(--mel-text-muted); }
.s1-row-track { position: relative; height: 34px; }

.s1-bar { position: absolute; left: 0; top: 0; bottom: 0; overflow: hidden; border-radius: 6px; }
.s1-bar-inner { display: flex; gap: 3px; height: 100%; }
.s1-call {
  flex: 1 1 0; border-radius: 5px; display: flex; align-items: center; padding-left: 8px;
  background: repeating-linear-gradient(135deg, var(--s1-slow) 0 6px, var(--s1-slow-2) 6px 12px);
}
.s1-call i { font-style: normal; font-family: 'JetBrains Mono', ui-monospace, monospace; font-size: 10px; color: var(--mel-text-muted); }
.s1-bar--fast {
  background: linear-gradient(90deg, var(--s1-a2), var(--s1-a1));
  box-shadow: 0 0 18px color-mix(in srgb, var(--s1-a1) 45%, transparent);
}

.s1-end, .s1-flag {
  position: absolute; top: 50%; transform: translate(10px, -50%);
  opacity: 0; transition: opacity 200ms ease; white-space: nowrap;
}
.s1-end { font-family: 'JetBrains Mono', ui-monospace, monospace; font-size: 12px; color: var(--mel-text-muted); }
.s1-end.is-on, .s1-flag.is-on { opacity: 1; }
.s1-flag { display: inline-flex; align-items: baseline; gap: 8px; }
.s1-flag b { font-family: Poppins, system-ui, sans-serif; font-size: 18px; font-weight: 700; color: var(--mel-text-primary); font-variant-numeric: tabular-nums; }
.s1-flag span { font-size: 10.5px; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; color: var(--s1-a1); }
.s1-trace-foot { font-size: 11.5px; color: var(--mel-text-muted); }

/* ── Computer: the real canvas ── */
.s1-show {
  margin: 0; display: grid; grid-template-columns: 220px minmax(0, 1fr); gap: clamp(20px, 4vw, 48px); align-items: center;
  padding: 24px 0; border-top: 1px solid var(--s1-line); border-bottom: 1px solid var(--s1-line);
}
.s1-show-art img { display: block; width: 100%; height: auto; border-radius: 6px; box-shadow: 0 18px 40px rgba(15,23,42,0.22); }
.s1-show-copy { display: flex; flex-direction: column; gap: 14px; min-width: 0; }
.s1-show-kicker { font-family: 'JetBrains Mono', ui-monospace, monospace; font-size: 10.5px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--s1-a1); }
.s1-show-title { margin: 0; font-family: Poppins, system-ui, sans-serif; font-size: clamp(24px, 2.6vw, 34px); line-height: 1.1; letter-spacing: -0.025em; font-weight: 700; color: var(--mel-text-primary); max-width: 20ch; }
.s1-show-nums { margin: 0; display: grid; grid-template-columns: repeat(3, auto); justify-content: start; gap: 0 36px; }
.s1-show-nums div { display: flex; flex-direction: column-reverse; gap: 4px; }
.s1-show-nums dt { font-size: 12px; color: var(--mel-text-muted); }
.s1-show-nums dd { margin: 0; font-family: Poppins, system-ui, sans-serif; font-size: clamp(28px, 3vw, 40px); font-weight: 700; letter-spacing: -0.03em; line-height: 1; color: var(--mel-text-primary); font-variant-numeric: tabular-nums; }
.s1-show-body { margin: 0; max-width: 54ch; font-size: 14.5px; line-height: 1.6; color: var(--mel-text-secondary); }
/* The filmed run: a 16:9 player beside the numbers. */
.s1-show--film { grid-template-columns: minmax(0, 1.45fr) minmax(0, 1fr); padding: 28px 0; }
.s1-show--film .s1-show-title { font-size: clamp(22px, 2.2vw, 30px); }
@media (max-width: 960px) { .s1-show--film { grid-template-columns: minmax(0, 1fr); } }

/* ── Modes: an editorial row, hairlines only ── */
.s1-modes { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); }
.s1-mode { display: flex; flex-direction: column; gap: 6px; padding: 16px 20px 4px 0; border-top: 1.5px solid var(--mel-text-primary); min-width: 0; }
.s1-mode + .s1-mode { padding-left: 20px; border-left: 1px solid var(--s1-line); }
.s1-mode-n { font-family: 'JetBrains Mono', ui-monospace, monospace; font-size: 10.5px; color: var(--s1-a1); }
.s1-mode-title { font-size: 16px; font-weight: 650; letter-spacing: -0.01em; color: var(--mel-text-primary); }
.s1-mode-body { font-size: 13.5px; line-height: 1.5; color: var(--mel-text-secondary); }
.s1-mode-tool { margin-top: 4px; font-family: 'JetBrains Mono', ui-monospace, monospace; font-size: 10.5px; color: var(--mel-text-muted); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* ── Stats ── */
.s1-stats { display: flex; flex-wrap: wrap; gap: 8px 28px; font-size: 12.5px; color: var(--mel-text-muted); }
.s1-stat { display: inline-flex; align-items: baseline; gap: 6px; }
.s1-stat b { font-size: 14px; font-weight: 700; color: var(--mel-text-primary); font-variant-numeric: tabular-nums; }
.s1-stat s { text-decoration-thickness: 1.5px; }

/* ── Tablet ── */
@media (max-width: 960px) {
  .s1-modes { grid-template-columns: repeat(2, minmax(0, 1fr)); row-gap: 18px; }
  .s1-mode:nth-child(3) { padding-left: 0; border-left: 0; }
}
/* ── Phone: labels move above their bars, the axis spans the full width ── */
@media (max-width: 640px) {
  .s1 { padding-top: 44px; padding-bottom: 44px; }
  .s1-head { grid-template-columns: minmax(0, 1fr); align-items: start; gap: 18px; }
  .s1-head-figure { flex-direction: row; align-items: baseline; gap: 10px; }
  .s1-x { font-size: 3rem; }
  .s1-x-label { text-align: left; }
  .s1-row { grid-template-columns: minmax(0, 1fr); gap: 6px; }
  .s1-row-who { flex-direction: row; align-items: baseline; gap: 8px; padding-right: 0; }
  .s1-overlay, .s1-axis { left: 0; }
  .s1-row-track { height: 26px; }
  .s1-call i { display: none; }
  .s1-plot { gap: 14px; }
  .s1-flag b { font-size: 15px; }
  .s1-show { grid-template-columns: 110px minmax(0, 1fr); gap: 16px; padding: 18px 0; }
  .s1-show--film { grid-template-columns: minmax(0, 1fr); }
  .s1-show--film .s1-show-body { display: block; font-size: 13.5px; }
  .s1-show-nums { gap: 0 18px; }
  .s1-show-nums dd { font-size: 22px; }
  .s1-show-body { display: none; }
  .s1-modes { grid-template-columns: minmax(0, 1fr); row-gap: 0; }
  .s1-mode, .s1-mode + .s1-mode { padding: 12px 0; border-left: 0; border-top: 1px solid var(--s1-line); }
  .s1-mode:first-child { border-top: 1.5px solid var(--mel-text-primary); }
}