@font-face { font-family: Archivo; src: url(/fonts/Archivo-Regular.ttf) format("truetype"); font-weight: 400; font-display: swap; }
@font-face { font-family: Archivo; src: url(/fonts/Archivo-SemiBold.ttf) format("truetype"); font-weight: 600; font-display: swap; }
@font-face { font-family: Archivo; src: url(/fonts/Archivo-ExtraBold.ttf) format("truetype"); font-weight: 800; font-display: swap; }
@font-face { font-family: PlexMono; src: url(/fonts/IBMPlexMono-SemiBold.ttf) format("truetype"); font-weight: 600; font-display: swap; }

/* Perunit tokens (design/tokens.md): receipt paper, ink, shelf-tag yellow. */
:root {
  --bg: #F7F4EC; --card: #FFFFFF; --ink: #16171A; --muted: #5B5E66; --line: #E2DDCF;
  --tag: #FFD43B; --tag-ink: #16171A; --link: #0B6B57;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #121316; --card: #1C1E22; --ink: #EDEBE4; --muted: #A3A6AD; --line: #2C2F35; --tag: #F2C94C; --link: #3FBFA0; color-scheme: dark; }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 400 17px/1.55 Archivo, system-ui, sans-serif; }
a { color: var(--link); }
img { max-width: 100%; height: auto; display: block; }
.mono { font-family: PlexMono, ui-monospace, monospace; font-variant-numeric: tabular-nums; }
.wrap { max-width: 1120px; margin: 0 auto; padding: 0 20px; }

.bar { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 12px; padding: 22px 0; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--ink); text-decoration: none; }
.brand b { font-weight: 800; font-size: 22px; letter-spacing: -0.5px; }
.brand img { border-radius: 9px; }
.bar nav { display: flex; gap: 22px; }
.bar nav a { color: var(--ink); text-decoration: none; font-weight: 600; font-size: 15px; }
.bar nav a:hover, .bar nav a[aria-current] { text-decoration: underline; }

.hero { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr); gap: 48px; align-items: center; padding: 28px 0 72px; }
.chip { display: inline-block; font-size: 13px; font-weight: 800; letter-spacing: 0.6px; padding: 6px 12px; border: 2px solid var(--tag-ink); border-radius: 8px; background: var(--tag); color: var(--tag-ink); }
h1 { margin: 18px 0 16px; font-size: clamp(40px, 6.2vw, 68px); line-height: 1.02; letter-spacing: -2px; font-weight: 800; }
.lead { margin: 0 0 26px; font-size: 20px; color: var(--muted); max-width: 34em; }
.cta { display: flex; flex-wrap: wrap; align-items: center; gap: 14px; }
.play { display: inline-flex; align-items: center; gap: 10px; min-height: 56px; padding: 0 24px; border-radius: 12px; background: var(--ink); color: var(--bg); font-weight: 800; font-size: 17px; text-decoration: none; }
.play:hover { opacity: 0.9; }
.play svg { flex: none; }
.note { font-size: 14px; color: var(--muted); }

/* The live calculator in the hero, drawn as two shelf tags. */
.calc { background: var(--card); border: 1.5px solid var(--line); border-radius: 22px; padding: 20px; }
.calc h2 { margin: 0 0 4px; font-size: 20px; letter-spacing: -0.3px; }
.calc .hint { margin: 0 0 14px; font-size: 14px; color: var(--muted); }
.tag { position: relative; border: 1.5px solid var(--line); border-radius: 14px; padding: 14px; margin-top: 14px; display: grid; grid-template-columns: minmax(0, 1fr) 118px; gap: 12px; background: var(--card); transition: background-color .2s, border-color .2s; }
.tag.best { background: var(--tag); border-color: var(--tag-ink); color: var(--tag-ink); }
.tag .fields { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 8px; }
.tag label { display: flex; flex-direction: column; gap: 3px; font-size: 12px; font-weight: 600; }
.tag input, .tag select { width: 100%; min-height: 42px; border-radius: 10px; border: 1.5px solid var(--line); background: var(--card); color: var(--ink); padding: 0 10px; font: 600 16px PlexMono, ui-monospace, monospace; }
.tag select { font-family: Archivo, sans-serif; }
.tag .unitcol { grid-column: 1 / -1; }
.box { border: 2px solid currentColor; border-radius: 6px; padding: 6px 8px; display: flex; flex-direction: column; justify-content: space-between; min-height: 92px; }
.box small { font-size: 10px; font-weight: 800; letter-spacing: 1px; }
.box b { font: 600 22px/1.1 PlexMono, ui-monospace, monospace; overflow-wrap: anywhere; }
.box span { font-size: 11px; font-weight: 600; }
.badge { position: absolute; top: -10px; right: 14px; font-size: 11px; font-weight: 800; letter-spacing: 0.8px; padding: 3px 9px; border-radius: 8px; background: var(--line); color: var(--ink); }
.tag.best .badge { background: var(--tag-ink); color: var(--tag); }
.badge:empty { display: none; }
.verdict { margin: 14px 0 0; font-size: 15px; color: var(--muted); text-align: center; min-height: 1.5em; }
.verdict b { color: var(--ink); }

section { padding: 56px 0; }
h2.big { margin: 0 0 10px; font-size: clamp(30px, 4.4vw, 44px); line-height: 1.08; letter-spacing: -1px; }
.sub { margin: 0 0 32px; color: var(--muted); font-size: 18px; max-width: 40em; }

.pains { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.pain { background: var(--card); border: 1.5px solid var(--line); border-radius: 16px; padding: 22px; margin: 0; }
.pain p { margin: 0; }

.row { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 48px; align-items: center; padding: 28px 0; }
.row.flip .shot { order: 2; }
.shot { margin: 0; justify-self: center; max-width: 300px; }
.shot img { border-radius: 26px; border: 8px solid var(--ink); }
.row h3 { margin: 0 0 10px; font-size: 28px; letter-spacing: -0.6px; line-height: 1.15; }
.row p { margin: 0 0 10px; color: var(--muted); }
.kbd { display: inline-block; font: 600 18px PlexMono, ui-monospace, monospace; padding: 2px 10px; border-radius: 8px; background: var(--tag); color: var(--tag-ink); border: 1.5px solid var(--tag-ink); margin-bottom: 12px; }

.steps { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; padding: 0; margin: 0; list-style: none; counter-reset: s; }
.steps li { background: var(--card); border: 1.5px solid var(--line); border-radius: 16px; padding: 20px; counter-increment: s; }
.steps li::before { content: counter(s); display: grid; place-items: center; width: 34px; height: 34px; border-radius: 8px; background: var(--tag); color: var(--tag-ink); border: 1.5px solid var(--tag-ink); font: 600 16px PlexMono, monospace; margin-bottom: 10px; }
.steps b { display: block; margin-bottom: 4px; }
.steps span { color: var(--muted); font-size: 15px; }

.video { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 360px); gap: 48px; align-items: center; }
.player { position: relative; aspect-ratio: 9 / 16; width: 100%; max-width: 360px; justify-self: center; border-radius: 22px; overflow: hidden; background: #000; border: 0; padding: 0; cursor: pointer; }
.player img { width: 100%; height: 100%; object-fit: cover; }
.player .pb { position: absolute; inset: 0; display: grid; place-items: center; }
.player .pb span { width: 84px; height: 84px; border-radius: 50%; background: var(--tag); border: 3px solid var(--tag-ink); display: grid; place-items: center; }
.player iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }

.faq details { background: var(--card); border: 1.5px solid var(--line); border-radius: 14px; padding: 16px 20px; margin-bottom: 10px; }
.faq summary { font-weight: 800; cursor: pointer; }
.faq p { margin: 10px 0 0; color: var(--muted); }

.band { margin: 32px 0 64px; background: var(--tag); color: var(--tag-ink); border: 2px solid var(--tag-ink); border-radius: 24px; padding: 40px 28px; text-align: center; }
.band h2 { margin: 0 0 8px; font-size: clamp(30px, 4.4vw, 44px); letter-spacing: -1px; }
.band p { margin: 0 0 22px; }
.band .play { background: var(--tag-ink); color: #F7F4EC; }

.doc { max-width: 760px; padding: 10px 0 64px; }
.doc h1 { font-size: clamp(34px, 5vw, 48px); }
.doc h2 { font-size: 22px; margin: 32px 0 8px; }
.doc .meta { color: var(--muted); }

footer { border-top: 1.5px solid var(--line); padding: 26px 0 40px; font-size: 14px; color: var(--muted); }
footer .wrap { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px; }
footer nav { display: flex; gap: 18px; }
footer a { color: var(--muted); }

@media (max-width: 860px) {
  .hero, .row, .video { grid-template-columns: minmax(0, 1fr); gap: 28px; }
  .row.flip .shot { order: 0; }
  .pains { grid-template-columns: minmax(0, 1fr); }
  .steps { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 480px) {
  .steps { grid-template-columns: minmax(0, 1fr); }
  .tag { grid-template-columns: minmax(0, 1fr); }
}
@media (prefers-reduced-motion: reduce) { * { transition: none !important; } }