:root {
  --bg: #f6f5f2;
  --surface: #ffffff;
  --ink: #141414;
  --muted: #5f6366;
  --line: #e4e2dd;
  --g1: #5f5f5f;
  --g2: #9a9a9a;
  --g3: #cfcfcf;
  --aqua: #2fb6c9;
  --aqua-deep: #128a9c;
  --aqua-soft: #e2f5f8;
  --night: #121212;
  --night-2: #1d1d1d;
  --radius: 20px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "Inter", system-ui, -apple-system, sans-serif;
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img, video { max-width: 100%; display: block; }
a { color: inherit; }

.wrap { max-width: 1080px; margin: 0 auto; padding: 0 20px; }

h1, h2, h3 { font-family: "Outfit", system-ui, sans-serif; line-height: 1.08; margin: 0 0 .45em; font-weight: 700; letter-spacing: -0.025em; }
h1 { font-size: clamp(2.4rem, 7vw, 4.4rem); }
h2 { font-size: clamp(1.8rem, 4.5vw, 2.7rem); }
h3 { font-size: 1.2rem; letter-spacing: -0.01em; }
p { margin: 0 0 1em; }
.muted { color: var(--muted); }

.eyebrow {
  display: inline-block;
  font-family: "Outfit", sans-serif;
  font-size: .8rem; font-weight: 700; letter-spacing: .14em; text-transform: uppercase;
  color: var(--g1);
  margin-bottom: .7em;
}

/* Header */
.site-header { padding: 16px 0; background: var(--bg); position: sticky; top: 0; z-index: 10; border-bottom: 1px solid transparent; }
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.logo { display: flex; align-items: center; gap: 10px; text-decoration: none; font-family: "Outfit", sans-serif; font-weight: 800; font-size: 1.6rem; letter-spacing: -0.03em; }
.logo img { height: 32px; width: auto; }
.nav { display: flex; gap: 22px; align-items: center; }
.nav a { text-decoration: none; font-weight: 600; font-size: .95rem; color: var(--muted); }
.nav a:hover { color: var(--ink); }

/* Guide banner (QR visitors) */
.guide-bar { background: var(--ink); color: #fff; font-size: .95rem; }
.guide-bar .wrap { display: flex; align-items: center; justify-content: center; gap: 10px 14px; padding-top: 11px; padding-bottom: 11px; flex-wrap: wrap; text-align: center; }
.guide-bar span { font-weight: 600; opacity: .85; }
.guide-bar a { color: #fff; text-decoration: none; font-weight: 700; padding: 5px 14px; border-radius: 999px; border: 1px solid rgba(255,255,255,.35); white-space: nowrap; }
.guide-bar a:hover { background: #fff; color: var(--ink); }

/* Buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 14px 24px; border-radius: 999px; font-weight: 700; font-size: .98rem; text-decoration: none; transition: transform .15s ease, background .15s ease; border: 2px solid transparent; }
.btn:hover { transform: translateY(-2px); }
.btn-dark { background: var(--ink); color: #fff; }
.btn-outline { border-color: var(--ink); color: var(--ink); }
.btn-light { background: #fff; color: var(--ink); }
.btn-outline-light { border-color: rgba(255,255,255,.5); color: #fff; }
.btn-aqua { background: var(--aqua-deep); color: #fff; }
.actions { display: flex; gap: 12px; flex-wrap: wrap; }

section { padding: 72px 0; }
.section-head { max-width: 640px; margin-bottom: 36px; }

/* Hero */
.hero { padding: 40px 0 64px; }
.hero .wrap { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.hero .lead { font-size: 1.2rem; color: var(--muted); max-width: 28em; margin-bottom: 28px; }
.hero-mark { display: flex; gap: 6px; margin-bottom: 20px; }
.hero-mark i { width: 34px; height: 6px; border-radius: 6px; background: var(--g1); }
.hero-mark i:nth-child(2) { background: var(--g2); }
.hero-mark i:nth-child(3) { background: var(--g3); }
.hero-media { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.hero-media img { border-radius: var(--radius); aspect-ratio: 4 / 5; object-fit: cover; width: 100%; }
.hero-media img:last-child { margin-top: 40px; }

/* Products */
.products { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.product-card { background: var(--surface); border: 1px solid var(--line); border-radius: 28px; overflow: hidden; display: flex; flex-direction: column; }
.product-card .media { aspect-ratio: 1 / 1; display: grid; place-items: center; overflow: hidden; }
.product-card .media img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s ease; }
.product-card:hover .media img { transform: scale(1.03); }
.product-card .body { padding: 26px 26px 28px; display: flex; flex-direction: column; gap: 4px; flex: 1; }
.product-card .tag { font-size: .78rem; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; color: var(--muted); }
.product-card p { color: var(--muted); }
.product-card .actions { margin-top: auto; }
.product-card .btn { padding: 12px 20px; font-size: .93rem; }

/* Video strip */
.reels { display: grid; grid-template-columns: repeat(2, minmax(0, 300px)); gap: 20px; justify-content: center; }
.reel { border-radius: 24px; overflow: hidden; background: #000; aspect-ratio: 9 / 16; }
.reel video { width: 100%; height: 100%; object-fit: cover; }
.reel-caption { text-align: center; font-weight: 600; margin-top: 12px; color: var(--muted); font-size: .95rem; }

/* Values */
.values { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.value { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 26px; }
.value .bar { width: 36px; height: 6px; border-radius: 6px; background: var(--g1); margin-bottom: 18px; }
.value:nth-child(2) .bar { background: var(--g2); }
.value:nth-child(3) .bar { background: var(--g3); }
.value p { margin: 0; color: var(--muted); }

/* Social */
.social { background: var(--ink); color: #fff; border-radius: 32px; padding: 48px; display: flex; justify-content: space-between; align-items: center; gap: 24px; flex-wrap: wrap; }
.social h2 { margin: 0 0 6px; }
.social p { margin: 0; opacity: .7; }

/* ---------- Guide pages ---------- */
.guide-hero { padding: 28px 0 56px; }
.guide-hero .wrap { display: grid; grid-template-columns: 1.1fr .9fr; gap: 48px; align-items: center; }
.back { display: inline-flex; gap: 6px; margin-bottom: 24px; font-weight: 600; text-decoration: none; color: var(--muted); font-size: .95rem; }
.back:hover { color: var(--ink); }
.guide-hero .photo { border-radius: 28px; overflow: hidden; background: var(--surface); border: 1px solid var(--line); }
.specs { display: flex; gap: 10px; flex-wrap: wrap; margin: 22px 0 26px; }
.spec { background: var(--surface); border: 1px solid var(--line); border-radius: 14px; padding: 10px 16px; }
.spec strong { display: block; font-family: "Outfit", sans-serif; font-size: 1.2rem; }
.spec span { font-size: .75rem; color: var(--muted); text-transform: uppercase; letter-spacing: .08em; font-weight: 600; }
.toc { display: flex; gap: 8px; flex-wrap: wrap; }
.toc a { background: var(--surface); border: 1px solid var(--line); padding: 8px 14px; border-radius: 999px; text-decoration: none; font-weight: 600; font-size: .88rem; }
.toc a:hover { border-color: var(--ink); }

.features { display: grid; gap: 14px; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.feature { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; }
.feature h3 { font-size: 1.05rem; margin-bottom: 6px; }
.feature p { margin: 0; color: var(--muted); font-size: .95rem; }

.steps { list-style: none; padding: 0; margin: 0; display: grid; gap: 12px; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.step { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; display: flex; gap: 16px; align-items: flex-start; }
.step-num { flex: none; width: 44px; height: 44px; border-radius: 50%; background: var(--ink); color: #fff; font-family: "Outfit", sans-serif; font-size: 1.25rem; font-weight: 700; display: grid; place-items: center; }
.step h3 { margin: 2px 0 4px; font-size: 1.05rem; }
.step p { margin: 0; color: var(--muted); font-size: .93rem; }

.split { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: center; }
.split .reel { max-width: 320px; margin: 0 auto; width: 100%; }

.gallery { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.gallery img { border-radius: 18px; aspect-ratio: 1 / 1; object-fit: cover; width: 100%; }

.care { background: var(--ink); color: #fff; border-radius: 32px; padding: 44px; }
.care .eyebrow { color: var(--g3); }
.care ul { margin: 0; padding: 0; list-style: none; display: grid; gap: 16px; }
.care li { display: flex; gap: 14px; align-items: flex-start; }
.care li::before { content: "✓"; flex: none; width: 28px; height: 28px; border-radius: 50%; background: rgba(255,255,255,.12); display: grid; place-items: center; font-weight: 700; font-size: .85rem; margin-top: 1px; }

.cta-row { display: flex; justify-content: space-between; align-items: center; gap: 20px; flex-wrap: wrap; border-top: 1px solid var(--line); padding-top: 36px; }

/* Bottle theme */
.theme-bottle .step-num { background: var(--aqua-deep); }
.theme-bottle .care { background: #0f4d57; }
.theme-bottle .guide-hero .photo { background: #fff; }

/* Tether theme (dark) */
.theme-tether .guide-hero { background: var(--night); color: #fff; padding-top: 28px; }
.theme-tether .guide-hero .muted, .theme-tether .guide-hero .back { color: #a5a5a5; }
.theme-tether .guide-hero .eyebrow { color: var(--g2); }
.theme-tether .guide-hero .spec { background: var(--night-2); border-color: #2c2c2c; }
.theme-tether .guide-hero .spec span { color: #9a9a9a; }
.theme-tether .guide-hero .toc a { background: var(--night-2); border-color: #2c2c2c; color: #fff; }
.theme-tether .guide-hero .photo { border-color: #2c2c2c; }

/* Footer */
.site-footer { padding: 48px 0 56px; color: var(--muted); font-size: .93rem; }
.site-footer .wrap { display: flex; justify-content: space-between; align-items: center; gap: 20px; flex-wrap: wrap; border-top: 1px solid var(--line); padding-top: 32px; }
.site-footer nav { display: flex; gap: 18px; flex-wrap: wrap; }
.site-footer a { text-decoration: none; font-weight: 600; }
.site-footer a:hover { color: var(--ink); }
.site-footer .logo img { height: 26px; }

@media (max-width: 820px) {
  body { font-size: 16px; }
  section { padding: 52px 0; }
  .wrap { padding: 0 16px; }
  .hero .wrap, .guide-hero .wrap, .products, .split { grid-template-columns: 1fr; }
  .hero { padding: 20px 0 40px; }
  .hero-media img:last-child { margin-top: 24px; }
  .values { grid-template-columns: 1fr; }
  .reels { grid-template-columns: 1fr 1fr; gap: 12px; }
  .gallery { grid-template-columns: 1fr 1fr; }
  .social, .care { padding: 32px 24px; border-radius: 24px; }
  .nav { gap: 14px; }
  .nav .hide-sm { display: none; }
  .guide-hero .photo { order: -1; }
}

.hero-photo { background: #fff; border: 1px solid var(--line); border-radius: 28px; overflow: hidden; }
.hero-photo img { width: 100%; height: auto; }

/* Photo additions */
.hero-photo { border: 0; background: none; }
.hero-photo img { border-radius: 28px; aspect-ratio: 1254 / 660; object-fit: cover; width: 100%; }
.moments { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.moment { text-decoration: none; }
.moment img { border-radius: 20px; aspect-ratio: 3 / 4; object-fit: cover; width: 100%; transition: transform .3s ease; }
.moment:hover img { transform: translateY(-3px); }
.moment span { display: block; margin-top: 10px; font-weight: 600; color: var(--muted); font-size: .95rem; }
.photo-steps { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.photo-step { background: var(--surface); border: 1px solid var(--line); border-radius: 24px; overflow: hidden; }
.photo-step img { width: 100%; aspect-ratio: 4 / 5; object-fit: cover; }
.photo-step .txt { padding: 20px 22px 24px; display: flex; gap: 14px; align-items: flex-start; }
.photo-step h3 { margin: 2px 0 4px; font-size: 1.05rem; }
.photo-step p { margin: 0; color: var(--muted); font-size: .93rem; }
.gallery img { aspect-ratio: 4 / 5; }
.guide-hero .photo img { width: 100%; aspect-ratio: 4 / 5; object-fit: cover; }
.product-card .media { aspect-ratio: 4 / 5; }
@media (max-width: 820px) {
  .moments { grid-template-columns: 1fr 1fr; }
  .photo-steps { grid-template-columns: 1fr; }
  .gallery { grid-template-columns: 1fr 1fr 1fr; gap: 8px; }
  .gallery img { border-radius: 12px; }

}

/* Bottle step & tip images */
.img-steps { list-style: none; padding: 0; margin: 0; display: grid; gap: 14px; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); }
.img-step { background: var(--surface); border: 1px solid var(--line); border-radius: 22px; overflow: hidden; }
.img-step img { width: 100%; aspect-ratio: 3 / 2; object-fit: cover; background: #fff; }
.img-step .txt { padding: 16px 18px 20px; display: flex; gap: 12px; align-items: center; }
.img-step .step-num { width: 38px; height: 38px; font-size: 1.05rem; }
.img-step h3 { margin: 0; font-size: 1.02rem; }
.img-step p { margin: 4px 0 0; color: var(--muted); font-size: .9rem; }
.img-tips { display: grid; gap: 14px; grid-template-columns: repeat(4, 1fr); }
.img-tip { background: var(--surface); border: 1px solid var(--line); border-radius: 22px; overflow: hidden; }
.img-tip img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; }
.img-tip h3 { margin: 0; padding: 14px 18px 18px; font-size: 1rem; }
@media (max-width: 820px) {
  .img-steps { grid-template-columns: 1fr 1fr; gap: 10px; }
  .img-step .txt { padding: 12px 12px 14px; gap: 10px; }
  .img-step .step-num { width: 30px; height: 30px; font-size: .9rem; }
  .img-step h3 { font-size: .92rem; }
  .img-tips { grid-template-columns: 1fr 1fr; gap: 10px; }
  .img-tip h3 { padding: 10px 12px 14px; font-size: .9rem; }
}