/* ── OMD SANCTUM — PRODUCT DETAIL PAGE SHARED STYLES ──────────────────────── */
/* Pendulum-pattern layout adapted to Sanctum brand voice                      */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

:root {
  --gold:          #C9A84C;
  --gold-dim:      #b8913a;
  --gold-deep:     #2a2015;
  --black:         #080808;
  --surface:       #111109;
  --surface-2:     #171512;
  --surface-3:     #1e1b14;
  --border:        #2e2818;
  --border-2:      #3e3020;
  --text-primary:  #f8f0d0;
  --text-secondary:#e8cc88;
  --text-muted:    #d4a850;
  --text-dim:      #b89040;
  --font-serif:    'Cormorant Garamond', Georgia, serif;
  --font-sans:     'Josefin Sans', sans-serif;
  --max-w:         1280px;
}

body {
  background: var(--black);
  color: var(--text-primary);
  font-family: var(--font-serif);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img { display: block; max-width: 100%; }
a   { color: inherit; text-decoration: none; }

/* ── NAV ─────────────────────────────────────────────────────────────── */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 40px;
  height: 72px;
  background: rgba(8,8,8,0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav__logo img { height: 40px; width: auto; }
.nav__menu {
  display: flex; gap: 36px; list-style: none;
  font-family: var(--font-sans); font-size: 10px;
  letter-spacing: 0.2em; text-transform: uppercase;
}
.nav__menu li a { color: var(--text-muted); transition: color .2s; white-space: nowrap; }
.nav__menu li a:hover, .nav__menu li a.active { color: var(--gold); }
.nav__cta {
  font-family: var(--font-sans); font-size: 10px;
  letter-spacing: 0.2em; text-transform: uppercase;
  padding: 10px 22px;
  border: 1px solid var(--gold);
  color: var(--gold);
  white-space: nowrap;
  transition: background .2s, color .2s;
}
.nav__cta:hover { background: var(--gold); color: var(--black); }

/* ── BREADCRUMB ──────────────────────────────────────────────────────── */
.breadcrumb {
  padding: 100px 40px 0;
  font-family: var(--font-sans); font-size: 0.62rem;
  letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--text-dim);
}
.breadcrumb a { color: var(--text-dim); transition: color .2s; }
.breadcrumb a:hover { color: var(--gold); }
.breadcrumb__sep { margin: 0 8px; opacity: 0.5; }

/* ── HERO ────────────────────────────────────────────────────────────── */
.pdp-hero {
  display: grid;
  grid-template-columns: 55fr 45fr;
  max-width: 1440px;
  margin: 0 auto;
  width: 100%;
}
.pdp-hero__image {
  position: sticky; top: 72px;
  height: clamp(480px, 75vh, 860px);
  overflow: hidden;
  align-self: start;
  background: linear-gradient(160deg, var(--surface-2) 0%, var(--black) 100%);
}
.pdp-hero__img {
  width: 100%; height: 100%;
  object-fit: contain;
  object-position: center center;
  transition: transform 8s ease;
}
.pdp-hero__image:hover .pdp-hero__img { transform: scale(1.03); }

.pdp-hero__panel {
  padding: 132px 48px 60px 52px;
  display: flex; flex-direction: column; justify-content: center;
  min-height: clamp(480px, 75vh, 860px);
}
.pdp-hero__eyebrow {
  font-family: var(--font-sans); font-size: 0.62rem;
  letter-spacing: 0.22em; text-transform: uppercase;
  color: var(--gold); margin-bottom: 16px;
}
.pdp-hero__name {
  font-family: var(--font-serif); font-size: clamp(2.8rem, 4vw, 4.2rem);
  font-weight: 300; line-height: 1.05;
  color: var(--text-primary); margin-bottom: 20px;
}
.pdp-hero__sub {
  font-size: 1.05rem; line-height: 1.65;
  color: var(--text-secondary); margin-bottom: 32px;
  max-width: 440px;
}
.pdp-hero__mockup {
  width: 160px; height: 200px;
  object-fit: contain; margin-bottom: 28px;
}
.pdp-hero__mockup img { width: 100%; height: 100%; object-fit: contain; }

.pdp-hero__price-row {
  display: flex; align-items: baseline; gap: 16px; margin-bottom: 28px;
}
.pdp-hero__price {
  font-family: var(--font-serif); font-size: 2.4rem;
  font-weight: 300; color: var(--gold);
}
.pdp-hero__supply {
  font-family: var(--font-sans); font-size: 0.65rem;
  letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--text-dim);
}
.btn-primary {
  display: inline-block;
  font-family: var(--font-sans); font-size: 0.7rem;
  letter-spacing: 0.2em; text-transform: uppercase;
  padding: 18px 40px; background: var(--gold); color: var(--black);
  border: none; cursor: pointer;
  transition: background .2s, transform .15s;
  margin-bottom: 16px;
}
.btn-primary:hover { background: #d4b870; transform: translateY(-1px); }
.btn-primary:disabled { opacity: 0.6; cursor: not-allowed; transform: none; }

.btn-secondary {
  display: inline-block;
  font-family: var(--font-sans); font-size: 0.7rem;
  letter-spacing: 0.2em; text-transform: uppercase;
  padding: 16px 36px; background: transparent;
  color: var(--gold); border: 1px solid var(--gold); cursor: pointer;
  transition: background .2s, color .2s;
}
.btn-secondary:hover { background: var(--gold); color: var(--black); }

.pdp-hero__back {
  font-family: var(--font-sans); font-size: 0.6rem;
  letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--text-dim); margin-top: 8px; display: inline-block;
  transition: color .2s;
}
.pdp-hero__back:hover { color: var(--gold); }

/* ── PURCHASE-TYPE SELECTOR ──────────────────────────────────────────── */
.purchase-type {
  display: flex; flex-direction: column; gap: 8px;
  margin-bottom: 24px;
}
.purchase-type__opt {
  display: flex; align-items: center; gap: 14px;
  padding: 13px 16px;
  border: 1px solid var(--border);
  background: var(--surface);
  cursor: pointer;
  transition: border-color .2s, background .2s;
  user-select: none;
}
.purchase-type__opt:hover { border-color: var(--gold-dim); background: var(--surface-2); }
.purchase-type__opt--active { border-color: var(--gold); background: var(--gold-deep); }
.purchase-type__opt input[type="radio"] {
  accent-color: var(--gold); width: 16px; height: 16px; flex-shrink: 0; cursor: pointer;
}
.purchase-type__info {
  flex: 1; display: flex; align-items: center; gap: 10px;
}
.purchase-type__name {
  font-family: var(--font-sans); font-size: 0.62rem;
  letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--text-primary);
}
.purchase-type__badge {
  font-family: var(--font-sans); font-size: 0.52rem;
  letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--black); background: var(--gold);
  padding: 2px 7px;
}
.purchase-type__amt {
  font-family: var(--font-serif); font-size: 1.1rem;
  color: var(--gold); white-space: nowrap;
}
.purchase-type__freq {
  font-family: var(--font-sans); font-size: 0.58rem;
  color: var(--text-dim); margin-left: 2px;
}

/* ── HEADLINE BAND ───────────────────────────────────────────────────── */
.headline-band {
  background: var(--gold); padding: 32px 40px; text-align: center;
}
.headline-band__text {
  font-family: var(--font-serif); font-size: clamp(1.2rem, 2vw, 1.7rem);
  font-style: italic; font-weight: 300;
  color: var(--black); letter-spacing: 0.01em;
}

/* ── STATS BELT ──────────────────────────────────────────────────────── */
.stats-belt {
  display: grid; grid-template-columns: repeat(3, 1fr);
  border-bottom: 1px solid var(--border);
}
.stat-item {
  padding: 52px 40px; text-align: center;
  border-right: 1px solid var(--border);
}
.stat-item:last-child { border-right: none; }
.stat-num {
  font-family: var(--font-serif); font-size: clamp(2.4rem, 4vw, 4rem);
  font-weight: 300; color: var(--gold); line-height: 1; margin-bottom: 12px;
}
.stat-label {
  font-family: var(--font-sans); font-size: 0.62rem;
  letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--text-muted); line-height: 1.6;
}

/* ── SECTION COMMON ──────────────────────────────────────────────────── */
.section-eyebrow {
  font-family: var(--font-sans); font-size: 0.6rem;
  letter-spacing: 0.24em; text-transform: uppercase;
  color: var(--gold); margin-bottom: 12px;
}
.section-title {
  font-family: var(--font-serif); font-size: clamp(1.8rem, 3vw, 2.8rem);
  font-weight: 300; color: var(--text-primary);
  margin-bottom: 48px; line-height: 1.1;
}
.gold-rule {
  width: 48px; height: 1px; background: var(--gold); margin: 24px 0 40px;
}

/* ── MECHANISM SECTION ───────────────────────────────────────────────── */
.mechanism-section {
  padding: 100px 0; background: var(--surface);
  max-width: 1440px; margin: 0 auto; width: 100%;
}
.mechanism-section__header {
  padding: 0 80px; margin-bottom: 64px; text-align: center;
}
.mechanism-block {
  display: grid; grid-template-columns: 1fr 1fr;
  align-items: stretch; border-top: 1px solid var(--border);
}
.mechanism-block:last-child { border-bottom: 1px solid var(--border); }
.mechanism-block--right { direction: rtl; }
.mechanism-block--right > * { direction: ltr; }
.mechanism-block__text {
  padding: 64px 80px;
  display: flex; align-items: center;
}
.mechanism-block__text p {
  font-size: 1.05rem; line-height: 1.8;
  color: var(--text-secondary); max-width: 520px;
}
.mechanism-block__image {
  overflow: hidden;
  height: clamp(300px, 60vh, 600px);
}
.mechanism-block__image img {
  width: 100%; height: 100%;
  object-fit: cover; object-position: center center;
  transition: transform 6s ease;
}
.mechanism-block__image:hover img { transform: scale(1.04); }

/* ── SCIENCE BAND ────────────────────────────────────────────────────── */
.science-band {
  background: var(--surface-3); padding: 80px 40px; text-align: center;
  border-top: 1px solid var(--border); border-bottom: 1px solid var(--border);
}
.science-band__quote {
  font-family: var(--font-serif); font-size: clamp(1.1rem, 2vw, 1.6rem);
  font-style: italic; font-weight: 300;
  color: var(--text-secondary); max-width: 820px; margin: 0 auto;
  line-height: 1.7;
}

/* ── STACK POSITION ──────────────────────────────────────────────────── */
.stack-section {
  background: var(--gold-deep); padding: 100px 80px; text-align: center;
  border-bottom: 1px solid var(--border);
}
.stack-section .section-title { color: var(--gold); }
.stack-copy {
  font-size: 1.05rem; line-height: 1.8; color: var(--text-secondary);
  max-width: 720px; margin: 0 auto 40px;
}
.stack-tier-badge {
  display: inline-block;
  font-family: var(--font-sans); font-size: 0.6rem;
  letter-spacing: 0.22em; text-transform: uppercase;
  padding: 10px 24px; border: 1px solid var(--gold);
  color: var(--gold);
}

/* ── WHO IT'S FOR ────────────────────────────────────────────────────── */
.who-section {
  display: grid; grid-template-columns: 1fr 1fr;
  align-items: center;
  border-bottom: 1px solid var(--border);
  max-width: 1440px; margin: 0 auto; width: 100%;
}
.who-section__image {
  background: var(--black);
}
.who-section__image img {
  width: 100%; height: auto;
  display: block;
  max-height: 70vh;
  object-fit: contain;
  object-position: center center;
  margin: 0 auto;
}
.who-section__image:hover img { transform: scale(1.04); }
.who-section__content {
  padding: 80px 72px; display: flex;
  flex-direction: column; justify-content: center;
  background: var(--surface-2);
  align-self: stretch;
}
.who-section__content .section-title { margin-bottom: 24px; }
.who-narrative {
  font-size: 1.02rem; line-height: 1.8;
  color: var(--text-secondary); margin-bottom: 36px;
}
.who-bullets {
  list-style: none; display: flex; flex-direction: column; gap: 14px;
}
.who-bullets li {
  display: flex; align-items: flex-start; gap: 14px;
  font-family: var(--font-sans); font-size: 0.72rem;
  letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--text-muted); line-height: 1.5;
}
.who-bullets li::before {
  content: '✦'; color: var(--gold); font-size: 0.5rem;
  flex-shrink: 0; margin-top: 3px;
}

/* ── INGREDIENTS ─────────────────────────────────────────────────────── */
.ingredients-section {
  padding: 100px 80px; background: var(--surface);
}
.ingredients-section .section-title { text-align: center; }
.ingredients-table {
  width: 100%; border-collapse: collapse;
  margin: 0 auto 40px; max-width: 900px;
}
.ingredients-table thead th {
  font-family: var(--font-sans); font-size: 0.6rem;
  letter-spacing: 0.2em; text-transform: uppercase;
  color: var(--gold); padding: 16px 20px;
  border-bottom: 1px solid var(--border); text-align: left;
}
.ingredients-table tbody td {
  padding: 20px 20px; border-bottom: 1px solid var(--border);
  font-size: 0.92rem; line-height: 1.6; color: var(--text-secondary);
  vertical-align: top;
}
.ingredients-table tbody td:first-child { color: var(--text-primary); font-weight: 400; }
.ingredients-table tbody td:nth-child(2) {
  color: var(--gold); font-family: var(--font-sans);
  font-size: 0.78rem; letter-spacing: 0.06em; white-space: nowrap;
}
.ingredients-note {
  font-family: var(--font-sans); font-size: 0.62rem;
  letter-spacing: 0.08em; color: var(--text-dim);
  text-align: center; max-width: 700px; margin: 0 auto 16px;
  line-height: 1.7;
}
.fda-note {
  font-family: var(--font-sans); font-size: 0.58rem;
  color: var(--text-dim); text-align: center;
  max-width: 680px; margin: 0 auto; line-height: 1.7;
  opacity: 0.7;
}

/* ── FAQ ─────────────────────────────────────────────────────────────── */
.faq-section {
  padding: 100px 80px; border-top: 1px solid var(--border);
}
.faq-section .section-title { text-align: center; }
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item { border-bottom: 1px solid var(--border); }
.faq-q {
  width: 100%; background: none; border: none; cursor: pointer;
  display: flex; justify-content: space-between; align-items: center;
  padding: 28px 0; gap: 24px;
  text-align: left;
}
.faq-q span:first-child {
  font-family: var(--font-serif); font-size: 1.05rem;
  font-weight: 400; color: var(--text-primary); line-height: 1.5;
}
.faq-icon {
  font-family: var(--font-sans); font-size: 1.4rem;
  color: var(--gold); flex-shrink: 0; transition: transform .25s;
  font-weight: 200; line-height: 1;
}
.faq-item.open .faq-icon { transform: rotate(45deg); }
.faq-a {
  max-height: 0; overflow: hidden;
  transition: max-height .35s ease, padding .35s ease;
  padding: 0;
}
.faq-item.open .faq-a { max-height: 400px; padding-bottom: 28px; }
.faq-a p, .faq-a {
  font-size: 0.95rem; line-height: 1.8;
  color: var(--text-secondary);
}

/* ── REVIEWS PLACEHOLDER ─────────────────────────────────────────────── */
.reviews-section {
  padding: 100px 80px; background: var(--surface-2);
  text-align: center; border-top: 1px solid var(--border);
}
.reviews-placeholder {
  max-width: 560px; margin: 0 auto;
  display: flex; flex-direction: column; align-items: center; gap: 20px;
}
.reviews-placeholder p {
  font-size: 1rem; line-height: 1.7; color: var(--text-secondary);
}
.reviews-placeholder p:first-child {
  font-family: var(--font-serif); font-size: 1.5rem;
  font-weight: 300; color: var(--text-primary);
}

/* ── CROSS-SELL ──────────────────────────────────────────────────────── */
.cross-sell-section {
  padding: 100px 80px; border-top: 1px solid var(--border);
  text-align: center;
}
.cs-grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 2px; margin: 0 auto 40px; max-width: 900px;
}
.cs-card {
  background: var(--surface-2); padding: 0;
  transition: background .2s;
  display: flex; flex-direction: column;
  border: 1px solid var(--border);
}
.cs-card:hover { background: var(--surface-3); }
.cs-card img {
  width: 100%; height: 240px;
  object-fit: contain; background: var(--surface-3); padding: 20px;
}
.cs-card__info { padding: 20px 24px 28px; flex: 1; }
.cs-card__name {
  font-family: var(--font-serif); font-size: 1.1rem;
  color: var(--text-primary); margin-bottom: 6px; line-height: 1.3;
}
.cs-card__category {
  font-family: var(--font-sans); font-size: 0.58rem;
  letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--text-dim); margin-bottom: 12px;
}
.cs-card__price {
  font-family: var(--font-serif); font-size: 1.3rem;
  color: var(--gold); font-weight: 300;
}
.view-all-link {
  font-family: var(--font-sans); font-size: 0.62rem;
  letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--gold); transition: opacity .2s;
}
.view-all-link:hover { opacity: 0.7; }

/* ── FOOTER ──────────────────────────────────────────────────────────── */
footer {
  background: var(--surface); border-top: 1px solid var(--border);
  padding: 80px 0 40px;
}
.footer__inner { max-width: var(--max-w); margin: 0 auto; padding: 0 40px; }
.footer__top {
  display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 60px;
  margin-bottom: 60px;
}
.footer__brand-name {
  font-family: var(--font-serif); font-size: 1.4rem;
  font-weight: 300; color: var(--gold); margin-bottom: 16px;
}
.footer__brand-desc {
  font-size: 0.88rem; line-height: 1.7;
  color: var(--text-dim); margin-bottom: 20px;
}
.footer__address {
  font-family: var(--font-sans); font-size: 0.62rem;
  letter-spacing: 0.06em; color: var(--text-dim); line-height: 1.9;
}
.footer__col-title {
  font-family: var(--font-sans); font-size: 0.58rem;
  letter-spacing: 0.22em; text-transform: uppercase;
  color: var(--gold); margin-bottom: 20px;
}
.footer__links { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.footer__links a {
  font-family: var(--font-sans); font-size: 0.65rem;
  letter-spacing: 0.08em; color: var(--text-dim); transition: color .2s;
}
.footer__links a:hover { color: var(--gold); }
.footer__bottom {
  border-top: 1px solid var(--border); padding-top: 28px;
  display: flex; flex-direction: column; gap: 10px;
}
.footer__copy {
  font-family: var(--font-sans); font-size: 0.6rem;
  letter-spacing: 0.1em; color: var(--text-dim);
}
.footer__disclaimer {
  font-family: var(--font-sans); font-size: 0.55rem;
  color: var(--text-dim); opacity: 0.6; line-height: 1.6;
}

/* ── STICKY BUY BAR ──────────────────────────────────────────────────── */
.sticky-bar {
  position: fixed; bottom: 0; left: 0; right: 0; z-index: 90;
  background: rgba(8,8,8,0.96);
  backdrop-filter: blur(16px);
  border-top: 1px solid var(--border);
  transform: translateY(100%);
  transition: transform .3s ease;
}
.sticky-bar.visible { transform: translateY(0); }
.sticky-bar__inner {
  max-width: var(--max-w); margin: 0 auto; padding: 14px 40px;
  display: flex; align-items: center; justify-content: space-between; gap: 20px;
}
.sticky-bar__product {
  display: flex; align-items: center; gap: 16px;
}
.sticky-bar__img { width: 44px; height: 52px; object-fit: contain; }
.sticky-bar__name {
  font-family: var(--font-serif); font-size: 1.1rem;
  color: var(--text-primary); font-weight: 300;
}
.sticky-bar__price {
  font-family: var(--font-serif); font-size: 1rem;
  color: var(--gold);
}
.sticky-bar__btn {
  padding: 14px 36px; margin-bottom: 0;
  white-space: nowrap;
}

/* ── HAMBURGER ───────────────────────────────────────────────────────── */
.nav__hamburger {
  display: none;
  flex-direction: column; justify-content: center;
  gap: 5px; background: none; border: none;
  cursor: pointer; padding: 8px; z-index: 110;
}
.nav__hamburger span {
  display: block; width: 26px; height: 2px;
  background: var(--gold); border-radius: 1px;
  transition: transform 0.3s ease, opacity 0.3s ease;
}
.nav__hamburger.open span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.nav__hamburger.open span:nth-child(2) { opacity: 0; }
.nav__hamburger.open span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* ── MOBILE ──────────────────────────────────────────────────────────── */
@media (max-width: 1024px) {
  .nav__menu { display: none; }
  .nav__cta { display: none; }
  .nav__hamburger { display: flex; }
  .nav { padding: 0 24px; }

  /* Mobile nav drawer */
  .nav__menu.mobile-open {
    display: flex !important;
    flex-direction: column;
    position: fixed; top: 72px; left: 0; right: 0;
    min-height: calc(100vh - 72px);
    background: rgba(8,8,8,0.98);
    padding: 28px 24px 40px; gap: 0;
    z-index: 99;
    overflow-y: auto;
    border-top: 1px solid rgba(201,168,76,0.25);
  }
  .nav__menu.mobile-open li { list-style: none; border-bottom: 1px solid var(--border); }
  .nav__menu.mobile-open li:last-child { border-bottom: none; }
  .nav__menu.mobile-open li a {
    font-family: var(--font-sans); font-size: 0.85rem;
    letter-spacing: 0.18em; text-transform: uppercase;
    color: var(--gold) !important; display: block; padding: 16px 0;
    transition: color 0.2s; opacity: 1 !important;
  }
  .nav__menu.mobile-open li a:hover { color: var(--gold); }

  .pdp-hero {
    grid-template-columns: 1fr;
  }
  .pdp-hero__image {
    position: relative; top: auto;
    height: auto; min-height: auto;
  }
  .pdp-hero__img { height: auto; }
  .pdp-hero__panel {
    padding: 32px 24px 60px; min-height: auto;
  }
  /* Move bottle mockup above description on mobile */
  .pdp-hero__eyebrow  { order: 1; }
  .pdp-hero__name     { order: 2; }
  .pdp-hero__mockup   { order: 3; margin-bottom: 20px; }
  .pdp-hero__price-row{ order: 4; }
  .pdp-hero__sub      { order: 5; font-size: 0.9rem; margin-bottom: 20px; }
  .btn-primary.buy-now{ order: 6; }
  .pdp-hero__back     { order: 7; }
  .pdp-hero__panel    { display: flex; flex-direction: column; }
  .breadcrumb { padding: 88px 24px 0; }

  .stats-belt { grid-template-columns: 1fr; }
  .stat-item { border-right: none; border-bottom: 1px solid var(--border); }

  .mechanism-block { grid-template-columns: 1fr; }
  .mechanism-block--right { direction: ltr; }
  .mechanism-block__text { padding: 40px 24px; }
  .mechanism-block__text p { max-width: none; }
  .mechanism-block__image { height: clamp(220px, 45vh, 380px); order: -1; }

  .who-section { grid-template-columns: 1fr; }
  .who-section__image img { max-height: 50vh; }
  .who-section__content { padding: 48px 24px; }

  .ingredients-section { padding: 60px 24px; }
  .ingredients-table thead { display: none; }
  .ingredients-table tbody td { display: block; padding: 8px 0; border: none; }
  .ingredients-table tbody tr { border-bottom: 1px solid var(--border); padding: 16px 0; display: block; }

  .faq-section { padding: 60px 24px; }
  .cross-sell-section { padding: 60px 24px; }
  .cs-grid { grid-template-columns: 1fr; max-width: 400px; }

  .stack-section { padding: 60px 24px; }
  .reviews-section { padding: 60px 24px; }
  .mechanism-section { padding: 60px 0; }
  .mechanism-section__header { padding: 0 24px; }

  .footer__top { grid-template-columns: 1fr 1fr; gap: 40px; }
  .footer__inner { padding: 0 24px; }

  .sticky-bar__inner { padding: 12px 16px; gap: 12px; }
  .sticky-bar__name { font-size: 0.85rem; }
  .sticky-bar__img { display: none; }
}

@media (max-width: 480px) {
  .footer__top { grid-template-columns: 1fr; }
  .cs-grid { grid-template-columns: 1fr; }
}