:root {
  --paper: #e6eef6;
  --ink: #14181d;
  --muted: #243140;
  --line: rgba(20, 24, 29, 0.16);
  --fill: #14181d;
  --fill-text: #f7fafc;
  --frame: #d5dee8;
  --max: 1680px;
  --font-display: "Clash Display", Satoshi, system-ui, sans-serif;
  --font-sans: Satoshi, system-ui, sans-serif;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #0e1216;
    --ink: #f4f7fa;
    --muted: #c5d0db;
    --line: rgba(244, 247, 250, 0.18);
    --fill: #f4f7fa;
    --fill-text: #14181d;
    --frame: #1c242c;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 1.0625rem;
  line-height: 1.45;
  letter-spacing: -0.011em;
  text-rendering: optimizeLegibility;
}

::selection {
  background: var(--ink);
  color: var(--paper);
}

:focus { outline: none; }

:focus-visible {
  outline: 2px solid var(--ink);
  outline-offset: 3px;
}

.skip {
  position: absolute;
  left: 12px;
  top: -48px;
  z-index: 3;
  background: var(--fill);
  color: var(--fill-text);
  padding: 10px 14px;
  text-decoration: none;
}

.skip:focus { top: 12px; }

.wrap {
  width: min(var(--max), calc(100% - 40px));
  margin-inline: auto;
}

.site-header { margin-bottom: 28px; }

.bar {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 28px;
  padding: 26px 0 16px;
  border-bottom: 1px solid var(--ink);
}

.wordmark {
  color: inherit;
  text-decoration: none;
}

.wordmark h1 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(2.7rem, 5vw, 4.25rem);
  letter-spacing: -0.055em;
  line-height: 0.88;
}

.promises {
  margin: 0 0 8px;
  text-align: right;
  font-size: 1.02rem;
  line-height: 1.35;
}

.feature {
  display: flex;
  flex-direction: column;
  gap: 72px;
}

.flags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  margin: 0 0 12px;
  padding-top: 10px;
  border-top: 1px solid var(--ink);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.frame {
  background: var(--frame);
  border: 1px solid var(--line);
  line-height: 0;
}

.frame img {
  display: block;
  width: 100%;
  height: auto;
}

.label {
  padding-top: 16px;
}

.piece-large .label {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 16px 32px;
  align-items: end;
}

.piece h2,
.piece h3 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: -0.04em;
  line-height: 0.95;
}

.piece-large h2 {
  font-size: clamp(2rem, 4vw, 3.4rem);
}

.piece h3 {
  font-size: 1.55rem;
  letter-spacing: -0.03em;
}

.summary {
  margin: 10px 0 0;
  max-width: 42rem;
  font-size: 1.05rem;
}

.specs,
.by,
.counts {
  margin: 8px 0 0;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
  font-size: 0.98rem;
}

.by { margin-top: 4px; }

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  justify-content: flex-end;
}

.actions form {
  margin: 0;
  display: flex;
}

.btn {
  appearance: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 18px;
  border: 1px solid var(--ink);
  border-radius: 0;
  background: var(--fill);
  color: var(--fill-text);
  font: inherit;
  font-weight: 700;
  letter-spacing: -0.015em;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 160ms ease, color 160ms ease;
}

.btn.quiet {
  background: transparent;
  color: var(--ink);
}

.btn:hover {
  background: transparent;
  color: var(--ink);
}

.btn.quiet:hover {
  background: var(--ink);
  color: var(--paper);
}

.btn[aria-pressed="true"] {
  background: transparent;
  color: var(--ink);
}

.shelf,
.faq { margin-top: 84px; }

.section-title {
  margin: 0 0 22px;
  padding-top: 12px;
  border-top: 1px solid var(--ink);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.7rem, 3vw, 2.4rem);
  letter-spacing: -0.045em;
  line-height: 1;
}

.shelf-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 36px 22px;
}

.piece:not(.piece-large) .label {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 12px;
}

.piece:not(.piece-large) .actions {
  justify-content: flex-start;
}

.piece:not(.piece-large) .flags {
  letter-spacing: 0.12em;
}

.qa + .qa { margin-top: 22px; }

.qa h3 {
  margin: 0 0 4px;
  font-family: var(--font-sans);
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.qa p,
.empty {
  margin: 0;
  max-width: 64ch;
}

.site-footer {
  margin-top: 72px;
  padding-bottom: 36px;
}

.foot {
  padding-top: 16px;
  border-top: 1px solid var(--ink);
}

.foot p { margin: 0; }

.foot a {
  color: inherit;
  text-underline-offset: 0.18em;
}

@media (max-width: 800px) {
  .wrap { width: min(var(--max), calc(100% - 28px)); }

  .bar {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
    padding-top: 20px;
  }

  .promises {
    margin: 0;
    text-align: left;
  }

  .piece-large .label {
    grid-template-columns: 1fr;
  }

  .actions,
  .piece:not(.piece-large) .actions {
    display: grid;
    grid-template-columns: 1fr;
    justify-content: stretch;
    width: 100%;
  }

  .actions form,
  .btn { width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .btn { transition: none; }
}