/* signal-motion - design tokens + base styles
   Copy into the project and import, or port tokens into Tailwind theme. */

:root {
  --cream: #FFFAED;
  --cream-deep: #E8E0D4;
  --ink: #0F0F0F;
  --ink-pure: #000000;
  --signal: #F43C00;
  --signal-deep: #D43500;
  --paper: #FFFFFF;
  --mute: #7A7A7A;
  --hairline: #E5E5E5;
  --hairline-dark: #2A2A2A;

  --font-sans: "Satoshi", "Inter", system-ui, sans-serif;
  --font-mono: "Geist Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  --gutter: clamp(1.25rem, 4vw, 4rem);
  --chapter-pad: clamp(1rem, 3svh, 3rem);
  --nav-height: 5.4rem;
  --h-display: clamp(2rem, min(7vw, 10svh), 7rem);
  --h-section: clamp(1.75rem, min(5vw, 8svh), 4.5rem);

  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
}

html:has(.sm-slides) { scroll-snap-type: y mandatory; scroll-padding-block: 0; }
.sm-slides > section, .sm-slides > footer, body:has(.sm-slides) > .sm-footer {
  box-sizing: border-box;
  min-block-size: 100vh;
  min-block-size: 100dvh;
  padding: calc(var(--nav-height) + var(--chapter-pad)) var(--gutter) var(--chapter-pad);
  scroll-snap-align: start;
  scroll-snap-stop: always;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: clamp(1rem, 3svh, 2.5rem);
}

.sm-page {
  background: var(--cream);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 1.0625rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ---------- type ---------- */
.sm-display {
  font-size: var(--h-display);
  line-height: 0.98;
  letter-spacing: -0.03em;
  font-weight: 500;
}
.sm-display .sm-dim { color: var(--mute); }
.sm-h2 {
  font-size: var(--h-section);
  line-height: 1.02;
  letter-spacing: -0.03em;
  font-weight: 500;
}
.sm-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.sm-label--signal { color: var(--signal); }
.sm-body-mute { color: color-mix(in srgb, var(--ink) 72%, transparent); }

/* ---------- chapters ---------- */
.sm-chapter { padding: var(--chapter-pad) var(--gutter); position: relative; isolation: isolate; }
.sm-chapter--ink   { background: var(--ink-pure); color: var(--paper); }
.sm-chapter--cream { background: var(--cream); color: var(--ink); }
.sm-chapter--deep  { background: var(--cream-deep); color: var(--ink); }
.sm-chapter--signal { background: var(--signal); color: var(--ink); }

/* ---------- nav pill ---------- */
.sm-nav {
  position: fixed; inset: 0 0 auto 0; z-index: 50;
  box-sizing: border-box; padding: 0.7rem var(--gutter);
  background: transparent;
}
.sm-nav__pill {
  box-sizing: border-box; min-height: 4rem; width: 100%;
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  padding: 0.6rem 1.25rem;
  border-radius: 999px;
  background: var(--ink);
  color: var(--paper);
}
.sm-nav__pill a { color: inherit; }

/* ---------- buttons ---------- */
.sm-btn {
  display: inline-flex; align-items: center; gap: 0.5em;
  font-family: var(--font-mono); font-size: 0.72rem; font-weight: 500;
  text-transform: uppercase; letter-spacing: 0.08em;
  padding: 1em 1.7em; border-radius: 999px; border: 1px solid transparent;
  background: var(--signal); color: var(--ink);
  cursor: pointer; text-decoration: none;
  transition: background 0.3s var(--ease-out), transform 0.3s var(--ease-out);
}
.sm-btn:hover { background: var(--signal-deep); transform: scale(0.97); }
.sm-btn--ghost { background: transparent; border-color: currentColor; color: inherit; }
.sm-btn--ghost:hover { background: color-mix(in srgb, currentColor 8%, transparent); }
.sm-btn--invert { background: var(--paper); color: var(--signal); }
.sm-btn--invert:hover { background: var(--cream); }

/* ---------- hero ---------- */
.sm-hero { position: relative; isolation: isolate; }
.sm-hero__media { position: absolute; z-index: -1; inset: var(--nav-height) var(--gutter) var(--chapter-pad); display: grid; place-items: center; pointer-events: none; }
.sm-hero__media img, .sm-hero__media video { max-height: 72svh; width: auto; max-width: 100%; object-fit: contain; }
.sm-hero__headline { position: relative; margin: 0; mix-blend-mode: difference; color: #fff; }
.sm-hero__aside {
  position: relative; align-self: flex-end;
  display: flex; align-items: flex-end; gap: 1.5rem; max-width: 34ch;
}

/* ---------- line-mask reveal + gravity ---------- */
.sm-line-mask { display: block; overflow: hidden; }
.sm-line { display: block; will-change: transform; }
.sm-gravity { white-space: pre-wrap; }
.sm-gravity .sm-g {
  display: inline-block; will-change: transform, opacity; white-space: pre;
}

/* ---------- hairline index rows ---------- */
.sm-index { border-top: 1px solid var(--hairline); }
.sm-index-row {
  display: grid; grid-template-columns: 1.2fr 1fr; align-items: baseline;
  gap: 2rem; padding: 1.6rem 0; border-bottom: 1px solid var(--hairline);
  text-decoration: none; color: inherit;
  transition: opacity 0.3s var(--ease-out);
}
.sm-index-row__title {
  font-size: clamp(1.75rem, 4vw, 3.5rem); font-weight: 500;
  letter-spacing: -0.02em; line-height: 1.05;
  transition: transform 0.3s var(--ease-out);
}
.sm-index-row:hover .sm-index-row__title { transform: translateX(0.5rem); }
.sm-index-row__tags { display: flex; gap: 2rem; justify-content: flex-end; }
.sm-index--dim-rest .sm-index-row:not(:first-child) { opacity: 0.45; }
.sm-index--dim-rest .sm-index-row:hover { opacity: 1; }
.sm-chapter--ink .sm-index, .sm-chapter--ink .sm-index-row { border-color: var(--hairline-dark); }

/* ---------- testimonials ---------- */
.sm-t { position: relative; }
.sm-t__stage { position: relative; display: grid; }
.sm-t__slide {
  grid-area: 1/1; display: grid; grid-template-columns: 200px 1fr auto;
  gap: 3rem; align-items: start;
}
.sm-t__slide img { width: 100%; aspect-ratio: 1; object-fit: cover; }
.sm-t__quote { font-size: clamp(1.25rem, 2.4vw, 2rem); line-height: 1.35; font-weight: 500; }
.sm-t__counter { font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.08em; }

/* ---------- floating accent object ---------- */
.sm-float-obj { position: absolute; z-index: 20; pointer-events: none; width: clamp(120px, 18vw, 320px); }
.sm-float-obj img { width: 100%; display: block; }

/* ---------- transition veil / wipe ---------- */
.sm-veil {
  position: fixed; inset: 0; z-index: 100; background: var(--signal);
  transform: scaleY(0); pointer-events: none;
}
.sm-wipe {
  position: absolute; inset: 0; z-index: -1; background: var(--signal);
  transform-origin: bottom; pointer-events: none;
}

/* ---------- footer ---------- */
.sm-footer { background: var(--signal); color: var(--ink); padding: var(--chapter-pad) var(--gutter) 2rem; }
.sm-footer__grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 3rem; }
.sm-footer a { color: inherit; text-decoration: none; }
.sm-footer__legal {
  margin-top: 4rem; padding-top: 1.25rem;
  border-top: 1px solid color-mix(in srgb, var(--paper) 35%, transparent);
  display: flex; justify-content: space-between;
}
.sm-footer__wordmark { display: block; white-space: nowrap; overflow-wrap: normal; font-size: min(20vw, 34svh); line-height: 1.05; }

/* ---------- responsive ---------- */
@media (max-width: 1023px) {
  .sm-index-row { grid-template-columns: 1fr; gap: 0.5rem; }
  .sm-index-row__tags { justify-content: flex-start; flex-wrap: wrap; gap: 0.75rem 1.5rem; }
  .sm-t__slide { grid-template-columns: 1fr; gap: 1.5rem; }
  .sm-t__slide img { max-width: 160px; }
  .sm-footer__grid { grid-template-columns: 1fr; }
  .sm-hero__aside { align-self: flex-start; flex-wrap: wrap; }
}
@media (max-width: 767px), (max-height: 500px) {
  :root { --nav-height: 4rem; }
  .sm-nav { padding-block: 0.5rem; }
  .sm-nav__pill { min-height: 3rem; padding-block: 0.4rem; }
}
@media (max-height: 500px) and (min-width: 600px) {
  .sm-t__slide { grid-template-columns: 1fr 2fr; gap: 1rem; }
  .sm-footer__grid { grid-template-columns: 1fr 1fr; gap: 1rem; }
  .sm-footer__legal { margin-top: 1rem; flex-wrap: wrap; gap: 0.75rem; }
}

@media (prefers-reduced-motion: reduce) {
  html:has(.sm-slides) { scroll-snap-type: y proximity; }
  .sm-line, .sm-g { transform: none !important; opacity: 1 !important; }
  .sm-wipe { transform: none !important; }
}