/* R3vive.me shop — light theme matching the r3vive.me main site (spec §5). No inline styles anywhere (CSP). */

@font-face {
  font-family: 'Inter Tight';
  src: url('/fonts/inter-tight-latin-wght.woff2') format('woff2');
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}

:root {
  --ink: #151515;         /* r3vive.me near-black: headings, primary buttons, footer */
  --text: #2b3438;        /* body copy */
  --muted: #5a666e;       /* secondary copy (5.4:1 on --bg) */
  --bg: #f2f5f8;          /* page background */
  --surface: #ffffff;     /* header, cards, panels */
  --tint: #eef3f7;        /* soft fills */
  --line: #dde4ea;        /* hairlines */
  --field: #c3cdd5;       /* form field borders */
  --accent: #4ec1b8;      /* r3vive.me teal: fills and decoration only (too light for text on white) */
  --accent-ink: #0a6f67;  /* teal for text, links and focus rings (6:1 on white) */
  --accent-tint: #e3f5f3;
  --warn-bg: #fff7e6;
  --warn-line: #efc46b;
  --warn-ink: #7a4b00;
  --danger: #c0392b;
  --radius: 20px;         /* cards, panels, sheets */
  --radius-sm: 12px;      /* fields, notices, framed images */
  --shadow: 0 1px 2px rgba(21, 21, 21, 0.04), 0 18px 40px -22px rgba(21, 21, 21, 0.22);
  --wrap: 1120px;
  color-scheme: light;
}

*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-padding-top: 96px; scroll-behavior: smooth; } /* keep focused elements clear of the sticky header */

[hidden] { display: none !important; } /* e.g. .layout sets display: grid, which would otherwise override [hidden] */

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: 'Inter Tight', system-ui, -apple-system, 'Segoe UI', Roboto, Arial, sans-serif;
  font-size: 17px;
  line-height: 1.6;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* The r3vive.me molecule artwork across the top of every page, fading into the page background.
   The home hero covers it with the full-strength version. */
main {
  flex: 1;
  background:
    linear-gradient(to bottom, rgba(242, 245, 248, 0.15), var(--bg) 420px),
    url('/img/hero-molecules.jpg') top center / max(1920px, 100%) auto no-repeat;
}

img { max-width: 100%; height: auto; display: block; }

a { color: var(--accent-ink); text-underline-offset: 3px; }
a:hover { color: var(--ink); }

:focus-visible { outline: 3px solid var(--accent-ink); outline-offset: 3px; border-radius: 6px; }
::selection { background: rgba(78, 193, 184, 0.35); }

h1, h2, h3 { color: var(--ink); line-height: 1.1; margin: 0 0 0.5em; font-weight: 500; letter-spacing: -0.02em; }
h1 { font-size: clamp(2.1rem, 4.4vw, 3.4rem); letter-spacing: -0.03em; }
h2 { font-size: clamp(1.6rem, 2.8vw, 2.3rem); }
h3 { font-size: 1.3rem; font-weight: 600; letter-spacing: -0.01em; }
p { margin: 0 0 1em; }

.wrap { width: 100%; max-width: var(--wrap); margin: 0 auto; padding: 0 16px; }
@media (min-width: 720px) { .wrap { padding: 0 24px; } }
main > .wrap > h1 { margin-top: 44px; }
.wrap > .notice { margin-bottom: 20px; }
.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* Header */
.site-header { position: sticky; top: 0; z-index: 10; background: rgba(255, 255, 255, 0.9); border-bottom: 1px solid rgba(21, 21, 21, 0.07); }
@supports ((-webkit-backdrop-filter: blur(1px)) or (backdrop-filter: blur(1px))) {
  .site-header { background: rgba(255, 255, 255, 0.74); -webkit-backdrop-filter: saturate(1.4) blur(14px); backdrop-filter: saturate(1.4) blur(14px); }
}
@media (max-width: 599px) { .site-header { position: static; } } /* the nav wraps on phones; a tall sticky header would cover focused fields */
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 10px 24px; flex-wrap: wrap; padding-top: 14px; padding-bottom: 14px; }
.logo img { width: 170px; height: auto; }
.site-nav { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 22px; font-size: 0.95rem; font-weight: 500; }
.site-nav a { color: var(--text); text-decoration: none; padding: 6px 0; }
.site-nav a:hover { color: var(--accent-ink); }
.site-nav a[aria-current='page'] { color: var(--ink); box-shadow: inset 0 -2px 0 var(--accent); }
.site-nav .cart-link { color: #fff; background: var(--ink); padding: 8px 16px; border-radius: 999px; font-weight: 600; }
.site-nav .cart-link:hover { color: #fff; background: #2f3a3f; }
.site-nav .cart-link[aria-current='page'] { color: #fff; box-shadow: 0 0 0 3px var(--accent); } /* beats the aria-current colour above */

/* Home hero: the molecule still from the r3vive.me hero, drifting slowly */
.hero { position: relative; isolation: isolate; overflow: hidden; text-align: center; background: #eef2f5; padding: clamp(80px, 12vw, 148px) 0 clamp(80px, 11vw, 136px); }
.hero::before {
  content: '';
  position: absolute;
  inset: -4%;
  z-index: -1;
  background:
    radial-gradient(ellipse 44% 56% at 50% 50%, rgba(255, 255, 255, 0.8), rgba(255, 255, 255, 0) 72%),
    url('/img/hero-molecules.jpg') center / cover no-repeat;
  animation: drift 40s ease-in-out infinite alternate;
}
@keyframes drift {
  from { transform: scale(1) translate3d(0, 0, 0); }
  to { transform: scale(1.07) translate3d(-1.2%, -1.6%, 0); }
}
.hero h1 { max-width: 14ch; margin: 22px auto 18px; font-size: clamp(2.5rem, 6vw, 4.4rem); line-height: 1.02; }
.hero .lead { margin: 0 auto 32px; }
.hero-actions { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; margin: 0; }
.eyebrow { display: inline-block; margin: 0; padding: 6px 14px; border-radius: 999px; background: var(--accent); color: var(--ink); font-size: 0.85rem; font-weight: 600; line-height: 1.4; }
.lead { font-size: clamp(1.05rem, 1.7vw, 1.22rem); color: var(--muted); max-width: 50ch; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  font: inherit; font-size: 1rem; font-weight: 600; line-height: 1.2; cursor: pointer; text-decoration: none; text-align: center;
  background: var(--ink); color: #fff; border: 1px solid var(--ink); border-radius: 999px; padding: 14px 26px;
  transition: background-color 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}
.btn:hover { background: #2f3a3f; border-color: #2f3a3f; color: #fff; }
.btn img { width: 22px; height: 22px; }
.btn[disabled] { background: #d9e0e5; border-color: #d9e0e5; color: var(--muted); cursor: not-allowed; }
.btn.secondary { background: var(--surface); color: var(--ink); border-color: var(--field); }
.btn.secondary:hover { background: var(--surface); color: var(--ink); border-color: var(--ink); }
.btn.link { background: none; border: 0; border-radius: 0; padding: 0; color: var(--accent-ink); font-weight: 500; text-decoration: underline; }
.btn.link:hover { background: none; color: var(--ink); }
.btn.wide { width: 100%; }

.message { min-height: 1.5em; margin: 12px 0; }
.message.error { color: var(--danger); }
.message.ok { color: var(--accent-ink); }

/* Notices */
.notice { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 18px 20px; color: var(--muted); font-size: 0.95rem; }
.notice p:last-child { margin-bottom: 0; }
.notice strong { color: var(--ink); }
.notice.warn { background: var(--warn-bg); border-color: var(--warn-line); color: var(--warn-ink); }
.notice.warn strong, .notice.warn a { color: var(--warn-ink); }
.draft-banner { background: var(--warn-bg); color: var(--warn-ink); border: 1px solid var(--warn-line); border-radius: var(--radius-sm); padding: 12px 16px; margin-bottom: 28px; font-weight: 600; }

/* Product grid */
.section { padding: clamp(56px, 8vw, 96px) 0; }
.section h2 { text-align: center; margin-bottom: clamp(28px, 4vw, 48px); }
.grid { display: grid; gap: 24px; grid-template-columns: repeat(auto-fill, minmax(min(280px, 100%), 1fr)); }
.card { position: relative; display: flex; flex-direction: column; overflow: hidden; background: var(--surface); border: 1px solid rgba(21, 21, 21, 0.05); border-radius: var(--radius); box-shadow: var(--shadow); transition: transform 0.2s ease, box-shadow 0.2s ease; }
.card:hover { transform: translateY(-3px); box-shadow: 0 1px 2px rgba(21, 21, 21, 0.05), 0 26px 48px -22px rgba(21, 21, 21, 0.3); }
.card img { aspect-ratio: 3 / 2; object-fit: cover; width: 100%; background: #f4f4f2; }
.card-body { padding: 20px 22px 22px; display: flex; flex-direction: column; gap: 12px; flex: 1; }
.card-title { font-size: 1.45rem; font-weight: 600; letter-spacing: -0.015em; margin: 0; }
.card-title a { color: var(--ink); text-decoration: none; }
.card-title a::after { content: ''; position: absolute; inset: 0; border-radius: var(--radius); } /* the whole card is the link */
.card-title a:focus-visible { outline: none; }
.card-title a:focus-visible::after { outline: 3px solid var(--accent-ink); outline-offset: -3px; }
.card-title .strength { display: block; margin-top: 4px; font-size: 0.95rem; font-weight: 500; letter-spacing: 0.02em; color: var(--muted); }
.chips { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 6px; }
.chips li { font-size: 0.82rem; font-weight: 500; color: var(--accent-ink); background: var(--accent-tint); border-radius: 8px; padding: 4px 10px; }
.card-foot { margin-top: auto; padding-top: 14px; border-top: 1px solid var(--line); display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.card-cta { font-size: 0.92rem; font-weight: 600; color: var(--ink); }
.card:hover .card-cta { color: var(--accent-ink); }
.meta { color: var(--muted); font-size: 0.92rem; margin: 0; }
.price { font-size: 1.35rem; font-weight: 600; letter-spacing: -0.01em; color: var(--ink); margin: 0; font-variant-numeric: tabular-nums; }
.badge { display: inline-block; font-size: 0.8rem; font-weight: 600; padding: 4px 10px; border-radius: 999px; background: var(--tint); color: var(--muted); }
.badge.sold-out { background: #fdecea; color: var(--danger); }

/* Home: research-use band, laid out like the Power of Peptides section on r3vive.me */
.research-band { background: var(--surface); padding: clamp(56px, 8vw, 104px) 0; overflow: hidden; }
.research { display: grid; gap: clamp(28px, 5vw, 64px); align-items: center; grid-template-columns: minmax(0, 1fr); }
@media (min-width: 860px) { .research { grid-template-columns: minmax(0, 0.95fr) minmax(0, 1fr); } }
.research-art { position: relative; display: grid; place-items: center; width: 100%; max-width: 480px; margin: 0 auto; }
.research-art::before { content: ''; position: absolute; width: 82%; aspect-ratio: 1; border-radius: 50%; background: var(--tint); }
.research-art img { position: relative; width: 100%; }
.research-copy { position: relative; isolation: isolate; }
.research-copy::before { content: ''; position: absolute; z-index: -1; width: 540px; height: 540px; right: -160px; top: 50%; transform: translateY(-50%); background: url('/img/glow.webp') center / contain no-repeat; opacity: 0.5; pointer-events: none; }
.research-copy > p { color: var(--muted); max-width: 50ch; }
.checks { list-style: none; padding: 0; margin: 0 0 30px; display: grid; gap: 12px; }
.checks li { position: relative; padding-left: 34px; }
.checks li::before { content: ''; position: absolute; left: 0; top: 0.2em; width: 20px; height: 20px; border-radius: 50%; border: 2px solid var(--accent); box-shadow: inset 0 0 0 3px var(--surface), inset 0 0 0 10px var(--accent); }

/* Product page */
.product { display: grid; gap: clamp(28px, 4vw, 56px); grid-template-columns: minmax(0, 1fr); padding: 40px 0 48px; }
@media (min-width: 860px) { .product { grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr); align-items: start; } }
.product-media { background: var(--surface); border-radius: var(--radius); padding: 12px; box-shadow: var(--shadow); }
.product-media img { border-radius: var(--radius-sm); aspect-ratio: 3 / 2; object-fit: cover; width: 100%; background: #f4f4f2; }
.product h1 { font-size: clamp(2rem, 3.6vw, 2.9rem); margin: 16px 0 8px; }
.product h1 .strength { display: block; margin-top: 8px; font-size: 0.45em; font-weight: 500; letter-spacing: 0.02em; color: var(--muted); }
.product .price { font-size: 1.6rem; margin-bottom: 22px; }
.facts { margin: 0 0 22px; display: grid; grid-template-columns: max-content minmax(0, 1fr); background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-sm); overflow: hidden; }
.facts dt, .facts dd { margin: 0; padding: 12px 16px; border-top: 1px solid var(--line); }
.facts dt:first-of-type, .facts dd:first-of-type { border-top: 0; }
.facts dt { background: var(--tint); color: var(--muted); font-size: 0.9rem; font-weight: 500; }
.facts dd { color: var(--ink); font-size: 0.95rem; }
@media (max-width: 480px) {
  .facts { grid-template-columns: minmax(0, 1fr); }
  .facts dt { background: none; padding-bottom: 2px; }
  .facts dd { border-top: 0; padding-top: 0; }
}
.buy { display: flex; flex-wrap: wrap; gap: 12px; align-items: flex-end; margin: 18px 0 6px; }
.buy .btn { flex: 1 1 200px; }
.product ~ .notice { margin-bottom: 56px; }

/* Forms */
label { display: block; font-weight: 600; font-size: 0.92rem; color: var(--ink); margin-bottom: 6px; }
.field { margin-bottom: 16px; }
.field small { color: var(--muted); font-weight: 400; }
input[type='text'], input[type='email'], input[type='tel'], select {
  width: 100%; font: inherit; font-size: 1rem; color: var(--ink); background: var(--surface);
  border: 1px solid var(--field); border-radius: var(--radius-sm); padding: 12px 14px;
}
input[readonly] { background: var(--tint); color: var(--muted); }
select { width: auto; min-width: 5.5rem; cursor: pointer; }
input:focus-visible, select:focus-visible { border-color: var(--accent-ink); outline: 2px solid var(--accent-ink); outline-offset: 1px; }
.hp-field { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.row { display: grid; gap: 0 16px; grid-template-columns: minmax(0, 1fr); }
@media (min-width: 640px) { .row.two { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); } }
.check { display: flex; gap: 10px; align-items: flex-start; }
.check label { font-weight: 500; margin: 0; }
.check input { flex: none; margin-top: 4px; width: 18px; height: 18px; accent-color: var(--accent-ink); }

/* Cart and checkout */
.layout { display: grid; gap: 28px; grid-template-columns: minmax(0, 1fr); padding: 40px 0 64px; } /* minmax(0, …) lets wide tables scroll inside .table-wrap instead of widening the page */
.layout.checkout { padding-top: 8px; }
@media (min-width: 900px) { .layout.checkout { grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr); align-items: start; } }
.panel, .summary { background: var(--surface); border-radius: var(--radius); box-shadow: var(--shadow); padding: clamp(16px, 3vw, 32px); }
.panel > :last-child, .summary > :last-child { margin-bottom: 0; }
.panel h2, .summary h2 { font-size: 1.35rem; font-weight: 600; letter-spacing: -0.01em; }
.table-wrap { overflow-x: auto; margin-bottom: 18px; }
.cart-table { width: 100%; border-collapse: collapse; }
.cart-table th, .cart-table td { text-align: left; padding: 14px 10px; border-bottom: 1px solid var(--line); vertical-align: middle; }
.cart-table th { color: var(--muted); font-weight: 500; font-size: 0.88rem; }
.cart-table td { color: var(--ink); }
.cart-table td.num, .cart-table th.num { text-align: right; font-variant-numeric: tabular-nums; }
.cart-table select { min-width: 4.5rem; }
.cart-table .problem { color: var(--danger); font-size: 0.9rem; }
.cart-table .strength { color: var(--muted); font-size: 0.88rem; }
@media (max-width: 480px) { .cart-table th, .cart-table td { padding: 10px 4px; } .cart-table select { min-width: 0; } } /* the cart table fits at 360px without sideways scrolling */
.summary-lines { list-style: none; padding: 0; margin: 0 0 14px; display: grid; gap: 8px; }
.summary-lines li { display: flex; justify-content: space-between; gap: 12px; font-variant-numeric: tabular-nums; }
.totals { display: grid; gap: 8px; border-top: 1px solid var(--line); padding-top: 14px; margin-bottom: 18px; font-variant-numeric: tabular-nums; }
.totals div { display: flex; justify-content: space-between; gap: 12px; }
.totals .grand { font-size: 1.25rem; font-weight: 600; color: var(--ink); padding-top: 4px; }
.small { font-size: 0.88rem; color: var(--muted); }

/* Prose (legal and policy pages): a white sheet from tablet width up */
.prose { max-width: 820px; padding-top: 40px; padding-bottom: 64px; } /* keep .wrap's side padding on phones */
@media (min-width: 760px) {
  .prose { background: var(--surface); border-radius: var(--radius); box-shadow: var(--shadow); padding: 56px 64px; margin-top: 44px; margin-bottom: 72px; }
}
main > .prose > h1 { margin-top: 0; }
.prose h2 { margin-top: 1.8em; font-size: clamp(1.3rem, 2.2vw, 1.6rem); }
.prose ul, .prose ol { padding-left: 1.3em; }
.prose li { margin-bottom: 0.4em; }
.prose .form-text { background: var(--tint); border-radius: var(--radius-sm); padding: 16px 18px; white-space: pre-line; }

/* Footer */
.site-footer { background: var(--ink); color: rgba(255, 255, 255, 0.66); padding: 44px 0 32px; font-size: 0.9rem; }
.site-footer a { color: #fff; }
.site-footer a:hover { color: var(--accent); }
.site-footer :focus-visible { outline-color: var(--accent); }
.research-notice { color: rgba(255, 255, 255, 0.86); max-width: 72ch; }
.research-notice strong { color: var(--accent); }
.footer-nav { display: flex; flex-wrap: wrap; gap: 8px 22px; margin: 18px 0; padding: 16px 0; border-top: 1px solid rgba(255, 255, 255, 0.12); border-bottom: 1px solid rgba(255, 255, 255, 0.12); }
.footer-nav a { text-decoration: none; }
.footer-nav a:hover { text-decoration: underline; }
.trader, .copyright { margin: 6px 0; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .hero::before { animation: none; }
  .btn, .card { transition: none; }
  .card:hover { transform: none; }
}