:root {
  --ink: #171a1d;
  --muted: #5d646b;
  --paper: #f4f3ef;
  --surface: #ffffff;
  --line: #d9d9d3;
  --signal: #fdff95;
  --signal-dark: #5b5d00;
  --warning: #fff3c4;
  --warning-line: #d38b00;
  --good: #176b4a;
  --bad: #a63122;
  --max: 72rem;
  --radius: 0.6rem;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--ink);
  background: var(--paper);
  font-synthesis: none;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; min-height: 100vh; background: var(--paper); }
img, svg, video, iframe { display: block; max-width: 100%; }
a { color: inherit; }
a:focus-visible, button:focus-visible { outline: 3px solid var(--signal); outline-offset: 3px; }

.skip-link {
  position: fixed; left: 1rem; top: 1rem; z-index: 10; transform: translateY(-200%);
  padding: .7rem 1rem; background: var(--ink); color: white; font-weight: 800;
}
.skip-link:focus { transform: translateY(0); }

.site-header { border-bottom: 1px solid var(--line); background: rgba(244,243,239,.96); }
.header-inner, .main, .footer-inner { width: min(100% - 2rem, var(--max)); margin-inline: auto; }
.header-inner { min-height: 4.5rem; display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.brand { display: inline-flex; flex: 0 1 auto; align-items: center; min-width: 0; text-decoration: none; }
.brand img { display: block; width: clamp(9rem, 34vw, 11.5rem); height: auto; max-width: 100%; }
.header-link { font-size: .88rem; font-weight: 800; text-decoration-thickness: .1em; text-underline-offset: .25em; }

.main { padding-block: clamp(2rem, 7vw, 5.5rem); }
.main.narrow { max-width: 48rem; }
.eyebrow { display: inline-flex; width: fit-content; margin: 0 0 .8rem; padding: .42rem .58rem; border-radius: .2rem; background: var(--ink); color: var(--signal); font-size: .78rem; font-weight: 900; letter-spacing: .14em; line-height: 1; text-transform: uppercase; }
h1, h2, h3 { margin-top: 0; letter-spacing: -.04em; line-height: 1.05; }
h1 { max-width: 15ch; margin-bottom: 1rem; font-size: clamp(2.65rem, 11vw, 6rem); }
h2 { margin-bottom: 1rem; font-size: clamp(1.65rem, 6vw, 2.5rem); }
h3 { margin-bottom: .45rem; font-size: 1.2rem; }
p, li { line-height: 1.65; }
.lede { max-width: 38rem; margin: 0; color: var(--muted); font-size: clamp(1.05rem, 3vw, 1.25rem); }
.hero { display: grid; gap: 2rem; align-items: center; }
.hero-rule { width: min(100%, 18rem); border-top: .5rem solid var(--signal); padding-top: 1.2rem; color: var(--muted); font-size: .85rem; font-weight: 800; text-transform: uppercase; letter-spacing: .08em; }
.hero-image { margin: 0; border-radius: var(--radius); overflow: hidden; background: #e8e2de; }
.hero-image img { width: 100%; aspect-ratio: 4 / 5; object-fit: cover; }
.hero-image figcaption, .showcase-grid figcaption { padding: .75rem 1rem; background: var(--ink); color: white; font-size: .76rem; font-weight: 850; letter-spacing: .09em; text-transform: uppercase; }
.product-showcase { display: grid; gap: 2rem; margin-top: clamp(4rem, 10vw, 7rem); padding-top: 2.5rem; border-top: 1px solid var(--line); }
.showcase-heading { max-width: 30rem; }
.showcase-heading p:last-child { color: var(--muted); }
.showcase-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .75rem; }
.showcase-grid figure { margin: 0; overflow: hidden; border-radius: var(--radius); background: var(--surface); }
.showcase-grid img { width: 100%; aspect-ratio: 3 / 4; object-fit: cover; }

.actions { display: flex; flex-direction: column; gap: .75rem; margin-top: 2rem; }
.button { min-height: 3.3rem; display: inline-flex; align-items: center; justify-content: center; gap: .5rem; border: 2px solid var(--ink); padding: .85rem 1.15rem; border-radius: .3rem; font-weight: 900; text-decoration: none; }
.button-primary { background: var(--ink); color: white; }
.button-primary:hover { background: var(--signal); border-color: var(--signal); color: var(--ink); }
.button-secondary { background: transparent; }
.button-secondary:hover { background: white; }

.page-intro { padding-bottom: 2rem; border-bottom: 1px solid var(--line); }
.page-intro h1 { font-size: clamp(2.4rem, 10vw, 4.5rem); }
.cards { display: grid; gap: 1rem; margin-top: 2rem; }
.card { position: relative; display: block; min-height: 13rem; padding: 1.4rem; border: 1px solid var(--line); border-top: .4rem solid var(--ink); border-radius: var(--radius); background: var(--surface); text-decoration: none; }
.card:hover { border-top-color: var(--signal); }
.card-number { display: inline-flex; width: fit-content; padding: .4rem .55rem; border-radius: .2rem; background: var(--ink); color: var(--signal); font-size: .8rem; font-weight: 900; letter-spacing: .12em; line-height: 1; }
.card h2 { margin-top: 2.5rem; margin-bottom: .5rem; }
.card p { margin: 0; color: var(--muted); }
.card-arrow { position: absolute; right: 1.4rem; bottom: 1.4rem; font-size: 1.5rem; }

.warning-panel { margin: 0 0 2.5rem; border: 3px solid var(--warning-line); border-radius: var(--radius); background: var(--warning); overflow: hidden; }
.warning-title { margin: 0; padding: 1rem; background: var(--ink); color: white; font-size: clamp(1.1rem, 5vw, 1.55rem); letter-spacing: .03em; text-align: center; }
.warning-video-prompt { margin: 0; padding: .9rem 1rem; background: #292d30; color: white; font-weight: 800; text-align: center; }
.warning-video-prompt a { color: var(--signal); text-underline-offset: .2em; }
.requirements { display: grid; gap: 0; margin: 0; padding: 0; list-style: none; counter-reset: req; }
.requirements li { display: grid; grid-template-columns: 2.5rem 1fr; gap: .65rem; align-items: start; padding: 1rem; border-top: 1px solid rgba(0,0,0,.18); font-weight: 750; line-height: 1.4; }
.requirements li::before { counter-increment: req; content: counter(req); display: grid; place-items: center; width: 2rem; height: 2rem; border-radius: 50%; background: var(--ink); color: white; font-weight: 900; }
.requirements .cure { grid-template-columns: 1fr; padding: 1.25rem; background: var(--signal); color: var(--ink); font-size: clamp(1.35rem, 6vw, 2.1rem); font-weight: 950; line-height: 1.08; text-align: center; }
.requirements .cure::before { display: none; }
.requirements .cure small { display: block; margin-top: .5rem; font-size: .75rem; letter-spacing: .12em; text-transform: uppercase; }

.section { padding-block: 2.25rem; border-top: 1px solid var(--line); }
.section:first-of-type { border-top: 0; }
.surface-grid { display: grid; gap: 1rem; }
.surface-box { padding: 1.25rem; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
.surface-box.good { border-top: .35rem solid var(--good); }
.surface-box.bad { border-top: .35rem solid var(--bad); }
.surface-box ul { margin-bottom: 0; padding-left: 1.2rem; }
.note { padding: 1rem 1.1rem; border-left: .35rem solid var(--ink); background: #e9e8e2; }
.note p { margin: 0; }

.steps { margin: 0; padding: 0; list-style: none; counter-reset: step; }
.steps li { counter-increment: step; display: grid; grid-template-columns: 3rem 1fr; gap: 1rem; padding: 1.25rem 0; border-top: 1px solid var(--line); }
.steps li::before { content: counter(step, decimal-leading-zero); display: grid; place-items: center; align-self: start; width: 2.65rem; min-height: 2.15rem; border-radius: .2rem; background: var(--ink); color: var(--signal); font-weight: 950; font-variant-numeric: tabular-nums; line-height: 1; }
.steps strong { display: block; margin-bottom: .25rem; line-height: 1.3; }
.steps p { margin: 0; color: var(--muted); }

.video-placeholder, .media-placeholder { display: grid; place-items: center; border: 1px dashed #9b9d9b; border-radius: var(--radius); background: #e9e8e2; color: var(--muted); text-align: center; }
.video-placeholder { aspect-ratio: 16 / 9; padding: 1rem; }
.video-placeholder.has-video { padding: 0; border-style: solid; background: #000; }
.video-placeholder iframe { width: 100%; height: 100%; border: 0; }
.priority-video { padding-top: 0; border-top: 0; scroll-margin-top: 1rem; }
.instagram-embed { width: min(100%, 30rem); margin-inline: auto; aspect-ratio: 9 / 16; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; background: white; }
.instagram-embed iframe { width: 100%; height: 100%; border: 0; }
.embed-fallback { margin: 1rem 0 0; color: var(--muted); font-size: .9rem; text-align: center; }
.embed-fallback a { color: var(--ink); font-weight: 800; }
.media-placeholder { min-height: 13rem; padding: 2rem; }
.video-placeholder strong, .media-placeholder strong { display: block; color: var(--ink); }
.guide-meta { display: flex; flex-direction: column; gap: .25rem; margin-top: 3rem; padding-top: 1rem; border-top: 1px solid var(--line); color: var(--muted); font-size: .86rem; }

.site-footer { border-top: 1px solid var(--line); }
.footer-inner { display: grid; gap: .7rem; padding-block: 1.5rem; color: var(--muted); font-size: .84rem; }
.footer-inner strong { color: var(--ink); }
.footer-links { display: flex; flex-wrap: wrap; gap: .65rem 1rem; }

@media (min-width: 40rem) {
  .actions { flex-direction: row; }
  .button { min-width: 13rem; }
  .hero { grid-template-columns: minmax(0, 1fr) minmax(18rem, .72fr); min-height: calc(100vh - 11rem); }
  .product-showcase { grid-template-columns: minmax(15rem, .7fr) minmax(0, 1.3fr); align-items: start; }
  .cards, .surface-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-inner { grid-template-columns: 1fr auto; align-items: center; }
  .footer-links { justify-content: flex-end; }
  .guide-meta { flex-direction: row; justify-content: space-between; }
}

@media (prefers-reduced-motion: no-preference) {
  .button, .card { transition: background-color .15s ease, border-color .15s ease, color .15s ease; }
}