:root {
  --sn-navy: #0033a0;
  --sn-navy-deep: #001e6b;
  --sn-navy-pale: #e6ecf8;
  --sn-navy-mist: #f3f6fc;
  --sn-gold: #c9a96a;
  --sn-gold-deep: #8b6f3a;
  --sn-gold-pale: #f5ebd6;
  --sn-champagne: #d9c89a;

  --sn-ink: #0e1b3a;
  --sn-ink-2: #3a4660;
  --sn-ink-3: #6c7a99;
  --sn-line: #d9e0ec;
  --sn-line-soft: #e8edf6;
  --sn-bg: #fafbfd;
  --sn-bg-alt: #f3f6fc;

  --sn-oil: #b8860b;
  --sn-oil-deep: #7a5a08;
  --sn-oil-pale: #faecc5;
  --sn-speed-low: #a31515;
  --sn-speed-mid: #b8860b;
  --sn-speed-high: #2d8659;
  --sn-speed-peak: #0033a0;
  --sn-film: #6b7a99;
  --sn-film-pale: #e0e6f1;
  --sn-metal: #b0b7c3;
  --sn-metal-pale: #e8ecf2;

  --sn-pass: #2d8659;
  --sn-warn: #b8860b;
  --sn-fail: #a31515;
  --sn-info: #1e58a8;

  --sn-font-display: 'Sora', 'Segoe UI', 'Helvetica Neue', system-ui, sans-serif;
  --sn-font-body: 'Inter', 'Segoe UI', 'Helvetica Neue', system-ui, sans-serif;
  --sn-font-mono: 'JetBrains Mono', 'Consolas', 'Menlo', monospace;

  --sn-wrap: 1280px;
  --sn-radius: 12px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--sn-font-body);
  color: var(--sn-ink);
  background: var(--sn-bg);
  line-height: 1.65;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--sn-navy); text-decoration: none; transition: color .2s; }
a:hover { color: var(--sn-navy-deep); }
ul, ol { list-style: none; }
button { font: inherit; cursor: pointer; border: 0; background: transparent; color: inherit; }

.sn-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,0.96);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--sn-line);
}
.sn-header__inner {
  max-width: var(--sn-wrap); margin: 0 auto;
  padding: 14px 24px;
  display: flex; align-items: center; justify-content: space-between; gap: 24px;
}
.sn-brand {
  display: flex; align-items: center; gap: 10px;
  font-family: var(--sn-font-display); font-weight: 700; font-size: 18px; color: var(--sn-ink);
  letter-spacing: -0.01em;
}
.sn-brand__mark {
  display: inline-flex; align-items: center; justify-content: center;
  width: 34px; height: 34px; border-radius: 8px;
  background: linear-gradient(135deg, var(--sn-navy) 0%, var(--sn-navy-deep) 100%);
  color: #fff; font-size: 13px; font-weight: 800; letter-spacing: 0.02em;
}
.sn-nav { display: flex; align-items: center; gap: 22px; }
.sn-nav a {
  font-size: 14px; font-weight: 500; color: var(--sn-ink-2);
  position: relative; padding: 6px 0;
}
.sn-nav a.is-active { color: var(--sn-navy); font-weight: 600; }
.sn-nav a.is-active::after {
  content: ''; position: absolute; left: 0; right: 0; bottom: -2px;
  height: 2px; background: var(--sn-gold); border-radius: 2px;
}
.sn-nav a:hover { color: var(--sn-navy); }
.sn-btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 9px 18px; border-radius: 8px;
  font-size: 14px; font-weight: 600;
  transition: all .2s;
}
.sn-btn--primary { background: var(--sn-navy); color: #fff; }
.sn-btn--primary:hover { background: var(--sn-navy-deep); color: #fff; transform: translateY(-1px); box-shadow: 0 6px 16px rgba(0,51,160,0.22); }
.sn-btn--ghost { background: transparent; color: var(--sn-navy); border: 1.5px solid var(--sn-navy); }
.sn-btn--ghost:hover { background: var(--sn-navy); color: #fff; }
.sn-btn--gold { background: var(--sn-gold); color: #fff; }
.sn-btn--gold:hover { background: var(--sn-gold-deep); color: #fff; }

.sn-menu-toggle { display: none; }

.sn-bread { background: var(--sn-bg-alt); border-bottom: 1px solid var(--sn-line); }
.sn-bread__inner {
  max-width: var(--sn-wrap); margin: 0 auto;
  padding: 12px 24px;
  font-family: var(--sn-font-mono); font-size: 12px;
  display: flex; align-items: center; gap: 8px; flex-wrap: wrap;
}
.sn-bread a { color: var(--sn-ink-3); }
.sn-bread a:hover { color: var(--sn-navy); }
.sn-bread__sep { color: var(--sn-line); }
.sn-bread__current { color: var(--sn-ink); font-weight: 700; }
.sn-bread__badge {
  font-size: 10.5px; letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--sn-gold-deep); background: var(--sn-gold-pale);
  padding: 3px 8px; border-radius: 4px; margin-left: auto; font-weight: 700;
}

.sn-hero {
  background:
    radial-gradient(ellipse at top right, rgba(0,51,160,0.05), transparent 60%),
    radial-gradient(ellipse at bottom left, rgba(201,169,106,0.06), transparent 60%),
    linear-gradient(180deg, #fff 0%, var(--sn-bg) 100%);
  padding: 56px 24px 36px;
  position: relative; overflow: hidden;
}
.sn-hero__inner { max-width: var(--sn-wrap); margin: 0 auto; }
.sn-hero__grid {
  display: grid; grid-template-columns: 1fr; gap: 36px; align-items: start;
}
.sn-eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--sn-font-mono); font-size: 12px; font-weight: 700;
  letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--sn-navy); background: var(--sn-navy-pale);
  padding: 6px 12px; border-radius: 20px;
}
.sn-eyebrow::before {
  content: ''; display: inline-block; width: 6px; height: 6px;
  border-radius: 50%; background: var(--sn-gold);
}
.sn-hero h1 {
  font-family: var(--sn-font-display);
  font-size: clamp(34px, 5.2vw, 56px);
  font-weight: 800; line-height: 1.08;
  letter-spacing: -0.025em;
  margin: 18px 0 18px;
  color: var(--sn-ink);
}
.sn-hero h1 .accent {
  display: inline-block;
  background: linear-gradient(90deg, var(--sn-navy) 0%, var(--sn-gold-deep) 100%);
  -webkit-background-clip: text; background-clip: text;
  color: transparent;
}
.sn-hero__lead {
  font-size: 17px; line-height: 1.7; color: var(--sn-ink-2);
  max-width: 720px; margin-bottom: 26px;
}
.sn-hero__cta { display: flex; gap: 12px; flex-wrap: wrap; }
.sn-btn--lg { padding: 13px 26px; font-size: 15px; }

.sn-atlas {
  background: #fff; border: 1px solid var(--sn-line);
  border-radius: 18px; padding: 24px;
  box-shadow: 0 12px 36px rgba(14, 27, 58, 0.07);
}
.sn-atlas__head {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  flex-wrap: wrap;
  padding-bottom: 14px; margin-bottom: 16px;
  border-bottom: 1px dashed var(--sn-line);
}
.sn-atlas__no {
  font-family: var(--sn-font-mono);
  font-size: 11px; font-weight: 700; letter-spacing: 0.12em;
  color: var(--sn-gold-deep); background: var(--sn-gold-pale);
  padding: 4px 10px; border-radius: 6px; text-transform: uppercase;
}
.sn-atlas__title {
  font-family: var(--sn-font-display);
  font-size: 15px; font-weight: 700; color: var(--sn-ink);
  flex: 1; min-width: 200px;
}
.sn-atlas__meta {
  font-family: var(--sn-font-mono); font-size: 11px; color: var(--sn-ink-3);
}
.sn-atlas__sub {
  font-family: var(--sn-font-mono);
  font-size: 10.5px; font-weight: 700; letter-spacing: 0.12em;
  color: var(--sn-navy-deep); text-transform: uppercase;
  margin: 18px 0 10px;
  padding-bottom: 6px; border-bottom: 1px solid var(--sn-line-soft);
  display: flex; justify-content: space-between; align-items: center; gap: 12px;
}
.sn-atlas__sub-tag {
  font-family: var(--sn-font-body);
  font-size: 10.5px; font-weight: 500; color: var(--sn-ink-3);
  text-transform: none; letter-spacing: 0;
}

.sn-speed { display: grid; grid-template-columns: repeat(5, 1fr); gap: 8px; }
.sn-speed__tier {
  background: var(--sn-bg-alt); border-radius: 8px; padding: 12px 10px;
  border-top: 3px solid var(--sn-speed-low);
  display: flex; flex-direction: column; gap: 4px;
}
.sn-speed__tier--2 { border-top-color: #c47800; }
.sn-speed__tier--3 { border-top-color: var(--sn-speed-mid); }
.sn-speed__tier--4 { border-top-color: #4a9c6f; }
.sn-speed__tier--5 { border-top-color: var(--sn-speed-peak); }
.sn-speed__no {
  font-family: var(--sn-font-mono); font-size: 9.5px; font-weight: 700;
  color: var(--sn-ink-3); letter-spacing: 0.08em;
}
.sn-speed__name { font-size: 12px; font-weight: 700; color: var(--sn-ink); }
.sn-speed__rate {
  font-family: var(--sn-font-mono); font-size: 16px; font-weight: 700;
  color: var(--sn-navy);
}
.sn-speed__rate sub { font-size: 9.5px; color: var(--sn-ink-3); font-weight: 500; }
.sn-speed__bar {
  height: 4px; background: var(--sn-line); border-radius: 2px;
  overflow: hidden; margin-top: 2px;
}
.sn-speed__bar-fill {
  height: 100%; border-radius: 2px;
  background: linear-gradient(90deg, var(--sn-speed-low) 0%, var(--sn-speed-peak) 100%);
}
.sn-speed__note { font-size: 10px; color: var(--sn-ink-3); line-height: 1.3; }

.sn-matrix {
  overflow-x: auto; -webkit-overflow-scrolling: touch;
  border-radius: 8px; border: 1px solid var(--sn-line-soft);
}
.sn-matrix table { width: 100%; border-collapse: collapse; min-width: 580px; }
.sn-matrix th, .sn-matrix td {
  padding: 9px 10px; text-align: left;
  font-size: 11.5px;
  border-bottom: 1px solid var(--sn-line-soft);
}
.sn-matrix th {
  background: var(--sn-bg-alt); color: var(--sn-ink-2);
  font-family: var(--sn-font-mono); font-size: 10px; font-weight: 700;
  letter-spacing: 0.06em; text-transform: uppercase;
  position: sticky; top: 0;
}
.sn-matrix tbody tr:hover { background: var(--sn-navy-mist); }
.sn-matrix td.mat { font-weight: 700; color: var(--sn-ink); }
.sn-pill {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 3px 8px; border-radius: 12px;
  font-family: var(--sn-font-mono); font-size: 9.5px; font-weight: 700;
  letter-spacing: 0.06em; text-transform: uppercase;
}
.sn-pill--pass { background: #e3f1e9; color: var(--sn-pass); }
.sn-pill--warn { background: var(--sn-oil-pale); color: var(--sn-oil-deep); }
.sn-pill--fail { background: #f6e0e0; color: var(--sn-fail); }

.sn-pack { display: grid; grid-template-columns: repeat(5, 1fr); gap: 8px; }
.sn-pack__card {
  background: var(--sn-bg-alt); border-radius: 8px;
  padding: 10px 8px; text-align: center;
  display: flex; flex-direction: column; align-items: center; gap: 4px;
}
.sn-pack__svg {
  width: 48px; height: 64px;
  display: flex; align-items: flex-end; justify-content: center;
}
.sn-pack__svg svg { display: block; }
.sn-pack__name { font-size: 11.5px; font-weight: 700; color: var(--sn-ink); }
.sn-pack__spec {
  font-family: var(--sn-font-mono); font-size: 9.5px; color: var(--sn-ink-3); line-height: 1.3;
}

.sn-film { display: grid; grid-template-columns: repeat(5, 1fr); gap: 8px; }
.sn-film__chip {
  background: linear-gradient(135deg, var(--sn-metal-pale) 0%, #fff 100%);
  border: 1px solid var(--sn-line);
  border-radius: 8px; padding: 10px;
  display: flex; flex-direction: column; gap: 4px;
  position: relative;
}
.sn-film__chip::before {
  content: ''; position: absolute; top: 6px; right: 6px;
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--sn-metal);
  box-shadow: 0 0 0 2px rgba(176,183,195,0.25);
}
.sn-film__name { font-size: 11.5px; font-weight: 700; color: var(--sn-ink); }
.sn-film__energy {
  font-family: var(--sn-font-mono); font-size: 10px; color: var(--sn-film);
}
.sn-film__energy strong { color: var(--sn-navy); font-size: 12px; }
.sn-film__note { font-size: 9.5px; color: var(--sn-ink-3); line-height: 1.3; }

.sn-shelf { display: grid; grid-template-columns: repeat(5, 1fr); gap: 8px; position: relative; }
.sn-shelf__zone {
  background: var(--sn-bg-alt); border-radius: 8px;
  padding: 10px 8px; text-align: center;
  border-bottom: 3px solid var(--sn-gold);
  display: flex; flex-direction: column; gap: 4px;
  position: relative;
}
.sn-shelf__zone--1 { border-bottom-color: var(--sn-navy); }
.sn-shelf__zone--2 { border-bottom-color: #2a4dc3; }
.sn-shelf__zone--3 { border-bottom-color: var(--sn-gold); }
.sn-shelf__zone--4 { border-bottom-color: var(--sn-gold-deep); }
.sn-shelf__zone--5 { border-bottom-color: var(--sn-champagne); }
.sn-shelf__dist {
  font-family: var(--sn-font-mono); font-size: 10px; font-weight: 700;
  color: var(--sn-ink-3); letter-spacing: 0.08em; text-transform: uppercase;
}
.sn-shelf__dist strong { display: block; font-size: 16px; color: var(--sn-navy); }
.sn-shelf__label { font-size: 11px; font-weight: 600; color: var(--sn-ink); }
.sn-shelf__metric {
  font-family: var(--sn-font-mono); font-size: 9.5px; color: var(--sn-ink-3); line-height: 1.3;
}
.sn-shelf__bar {
  height: 3px; background: var(--sn-line); border-radius: 2px;
  margin-top: 2px; overflow: hidden;
}
.sn-shelf__bar-fill { height: 100%; background: var(--sn-gold); border-radius: 2px; }

.sn-stack { display: grid; grid-template-columns: repeat(5, 1fr); gap: 4px; }
.sn-stack__layer {
  background: var(--sn-bg-alt); border-radius: 6px;
  padding: 8px 6px; text-align: center;
  border-left: 3px solid var(--sn-gold);
  display: flex; flex-direction: column; gap: 2px;
}
.sn-stack__layer--1 { border-left-color: #2a4dc3; background: var(--sn-navy-mist); }
.sn-stack__layer--2 { border-left-color: var(--sn-gold); background: var(--sn-gold-pale); }
.sn-stack__layer--3 { border-left-color: var(--sn-navy); background: var(--sn-navy-pale); }
.sn-stack__layer--4 { border-left-color: var(--sn-film); background: var(--sn-film-pale); }
.sn-stack__layer--5 { border-left-color: var(--sn-champagne); background: var(--sn-metal-pale); }
.sn-stack__no {
  font-family: var(--sn-font-mono); font-size: 9px; font-weight: 700;
  color: var(--sn-ink-3); letter-spacing: 0.06em;
}
.sn-stack__name { font-size: 11px; font-weight: 700; color: var(--sn-ink); }
.sn-stack__spec {
  font-family: var(--sn-font-mono); font-size: 9px; color: var(--sn-ink-3); line-height: 1.3;
}

.sn-atlas__footer {
  display: grid; grid-template-columns: 1fr 1fr; gap: 10px;
  margin-top: 16px; padding-top: 14px;
  border-top: 1px dashed var(--sn-line);
}
.sn-sig {
  background: linear-gradient(135deg, var(--sn-navy-pale) 0%, #fff 100%);
  border: 1px solid var(--sn-line);
  border-radius: 8px; padding: 12px 14px;
  display: flex; align-items: center; gap: 10px;
}
.sn-sig--gold {
  background: linear-gradient(135deg, var(--sn-gold-pale) 0%, #fff 100%);
  border-color: var(--sn-gold);
}
.sn-sig__icon {
  width: 32px; height: 32px; border-radius: 6px;
  background: var(--sn-navy); color: #fff;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.sn-sig--gold .sn-sig__icon { background: var(--sn-gold-deep); }
.sn-sig__title {
  font-family: var(--sn-font-display); font-size: 12px; font-weight: 700;
  color: var(--sn-ink); line-height: 1.2;
}
.sn-sig__body {
  font-family: var(--sn-font-mono); font-size: 10px; color: var(--sn-ink-3);
  margin-top: 2px;
}

.sn-trust {
  background: #fff;
  border-top: 1px solid var(--sn-line);
  border-bottom: 1px solid var(--sn-line);
  padding: 18px 24px;
}
.sn-trust__inner {
  max-width: var(--sn-wrap); margin: 0 auto;
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px;
}
.sn-trust__item {
  display: flex; align-items: center; gap: 10px;
  font-size: 13px;
}
.sn-trust__icon {
  width: 32px; height: 32px; border-radius: 8px;
  background: var(--sn-navy-pale); color: var(--sn-navy);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.sn-trust__text strong {
  display: block; color: var(--sn-ink); font-weight: 700; font-size: 13px;
}
.sn-trust__text span { color: var(--sn-ink-3); font-size: 11.5px; }

.sn-section { padding: 56px 24px; }
.sn-section--tight { padding: 36px 24px; }
.sn-section--alt { background: var(--sn-bg-alt); }
.sn-container { max-width: var(--sn-wrap); margin: 0 auto; }
.sn-section__head {
  text-align: center; max-width: 760px; margin: 0 auto 32px;
}
.sn-section__head .sn-eyebrow { margin-bottom: 14px; }
.sn-section__head h2 {
  font-family: var(--sn-font-display);
  font-size: clamp(26px, 3.4vw, 36px);
  font-weight: 700; line-height: 1.18;
  color: var(--sn-ink); letter-spacing: -0.015em;
  margin-bottom: 12px;
}
.sn-lead { font-size: 15.5px; color: var(--sn-ink-2); line-height: 1.7; }

.sn-geo {
  background: var(--sn-navy-pale);
  border-left: 4px solid var(--sn-gold);
  padding: 22px 28px;
  border-radius: 0 12px 12px 0;
  font-size: 16px; line-height: 1.75;
  color: var(--sn-ink-2); font-style: italic;
}
.sn-geo strong { color: var(--sn-navy); font-style: normal; font-weight: 600; }

.sn-grid { display: grid; gap: 18px; }
.sn-grid--3 { grid-template-columns: repeat(3, 1fr); }
.sn-grid--4 { grid-template-columns: repeat(4, 1fr); }

.sn-card {
  background: #fff;
  border: 1px solid var(--sn-line);
  border-radius: var(--sn-radius);
  padding: 22px;
  transition: all .25s;
  position: relative;
  display: flex; flex-direction: column;
}
.sn-card:hover {
  border-color: var(--sn-navy);
  transform: translateY(-2px);
  box-shadow: 0 8px 22px rgba(14,27,58,0.08);
}
.sn-card--premium {
  border-color: var(--sn-gold);
  background: linear-gradient(180deg, #fff 0%, var(--sn-gold-pale) 100%);
}
.sn-card--premium:hover { border-color: var(--sn-gold-deep); }
.sn-card__icon {
  width: 44px; height: 44px; border-radius: 10px;
  background: var(--sn-navy-pale); color: var(--sn-navy);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 14px;
}
.sn-card--premium .sn-card__icon {
  background: var(--sn-gold-pale); color: var(--sn-gold-deep);
}
.sn-card__tag {
  display: inline-flex; align-items: center;
  font-family: var(--sn-font-mono); font-size: 10px; font-weight: 700;
  letter-spacing: 0.1em; text-transform: uppercase;
  padding: 3px 8px; border-radius: 4px;
  position: absolute; top: 16px; right: 16px;
}
.sn-card__tag--gold { background: var(--sn-gold); color: #fff; }
.sn-card__tag--standard { background: var(--sn-navy-pale); color: var(--sn-navy); }
.sn-card__title {
  font-family: var(--sn-font-display);
  font-size: 17px; font-weight: 700; color: var(--sn-ink);
  margin-bottom: 8px; letter-spacing: -0.01em;
}
.sn-card__body {
  font-size: 13.5px; color: var(--sn-ink-2); line-height: 1.6;
}

.sn-table-wrap {
  overflow-x: auto; -webkit-overflow-scrolling: touch;
  border-radius: var(--sn-radius);
  border: 1px solid var(--sn-line);
  background: #fff;
}
.sn-table { width: 100%; border-collapse: collapse; min-width: 720px; }
.sn-table thead { background: var(--sn-navy); }
.sn-table th {
  padding: 13px 16px; text-align: left;
  color: #fff; font-family: var(--sn-font-mono);
  font-size: 11px; font-weight: 700;
  letter-spacing: 0.08em; text-transform: uppercase;
}
.sn-table td {
  padding: 13px 16px;
  font-size: 13.5px; color: var(--sn-ink-2);
  border-bottom: 1px solid var(--sn-line-soft);
  vertical-align: top;
}
.sn-table tbody tr:nth-child(even) { background: var(--sn-bg-alt); }
.sn-table tbody tr:hover { background: var(--sn-navy-mist); }
.sn-table td:first-child { font-weight: 700; color: var(--sn-ink); }
.sn-table .sn-pill { font-size: 10px; }

.sn-split {
  display: grid; grid-template-columns: 1.1fr 1fr; gap: 26px;
  background: #fff;
  border: 1px solid var(--sn-line);
  border-radius: var(--sn-radius);
  padding: 28px;
}
.sn-checklist { display: flex; flex-direction: column; gap: 12px; }
.sn-checklist__item {
  display: flex; gap: 10px; align-items: flex-start;
  font-size: 13.5px; color: var(--sn-ink-2); line-height: 1.55;
}
.sn-checklist__icon {
  width: 22px; height: 22px; border-radius: 6px;
  background: var(--sn-navy-pale); color: var(--sn-navy);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0; margin-top: 1px;
}
.sn-checklist__item strong { color: var(--sn-ink); }

.sn-faq { display: flex; flex-direction: column; gap: 10px; }
.sn-faq__item {
  background: #fff;
  border: 1px solid var(--sn-line);
  border-radius: 10px;
  overflow: hidden;
  transition: all .2s;
}
.sn-faq__item.is-open {
  border-color: var(--sn-gold);
  box-shadow: 0 4px 12px rgba(201,169,106,0.16);
}
.sn-faq__q {
  width: 100%; text-align: left;
  padding: 16px 20px;
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  font-family: var(--sn-font-display);
  font-size: 14.5px; font-weight: 600; color: var(--sn-ink);
  line-height: 1.4;
}
.sn-faq__q:hover { color: var(--sn-navy); }
.sn-faq__q-icon {
  flex-shrink: 0; width: 22px; height: 22px;
  border-radius: 50%; background: var(--sn-navy-pale); color: var(--sn-navy);
  display: flex; align-items: center; justify-content: center;
  transition: transform .25s;
}
.sn-faq__item.is-open .sn-faq__q-icon {
  background: var(--sn-gold); color: #fff; transform: rotate(180deg);
}
.sn-faq__a {
  max-height: 0; overflow: hidden;
  transition: max-height .35s ease;
}
.sn-faq__item.is-open .sn-faq__a { max-height: 500px; }
.sn-faq__a-inner {
  padding: 0 20px 18px;
  font-size: 13.5px; color: var(--sn-ink-2); line-height: 1.7;
}

.sn-sample {
  background: linear-gradient(135deg, var(--sn-navy) 0%, var(--sn-navy-deep) 100%);
  color: #fff;
  border-radius: 16px;
  padding: 32px;
  display: grid; grid-template-columns: 1fr auto; gap: 24px;
  align-items: center;
  position: relative; overflow: hidden;
}
.sn-sample::before {
  content: ''; position: absolute; top: -40px; right: -40px;
  width: 180px; height: 180px; border-radius: 50%;
  background: radial-gradient(circle, rgba(201,169,106,0.22) 0%, transparent 70%);
}
.sn-sample__eyebrow {
  font-family: var(--sn-font-mono); font-size: 11px; font-weight: 700;
  letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--sn-gold); margin-bottom: 8px;
}
.sn-sample h3 {
  font-family: var(--sn-font-display);
  font-size: 22px; font-weight: 700;
  margin-bottom: 8px; letter-spacing: -0.01em;
}
.sn-sample p { font-size: 14px; opacity: 0.88; margin-bottom: 16px; max-width: 580px; }
.sn-sample__price { text-align: center; position: relative; z-index: 1; }
.sn-sample__price strong {
  display: block; font-family: var(--sn-font-display);
  font-size: 44px; font-weight: 800; color: var(--sn-gold);
  letter-spacing: -0.02em; line-height: 1;
}
.sn-sample__price span {
  display: block; font-size: 11.5px; opacity: 0.78;
  margin-top: 4px; font-family: var(--sn-font-mono);
}

.sn-cta-band {
  background:
    radial-gradient(ellipse at top, rgba(201,169,106,0.12), transparent 70%),
    linear-gradient(180deg, var(--sn-navy-deep) 0%, var(--sn-navy) 100%);
  color: #fff;
  padding: 56px 24px;
  text-align: center;
}
.sn-cta-band .sn-eyebrow {
  background: rgba(201,169,106,0.22); color: var(--sn-gold);
}
.sn-cta-band h2 {
  font-family: var(--sn-font-display);
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 700;
  margin: 14px auto 12px;
  max-width: 720px;
  letter-spacing: -0.015em;
}
.sn-cta-band p {
  font-size: 15px; opacity: 0.85;
  max-width: 620px; margin: 0 auto 22px;
}
.sn-cta-band .sn-btn--ghost {
  background: transparent; color: #fff;
  border-color: rgba(255,255,255,0.5);
}
.sn-cta-band .sn-btn--ghost:hover {
  background: rgba(255,255,255,0.12); border-color: #fff;
}

.sn-related { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
.sn-link-card {
  display: block; padding: 16px 18px;
  background: #fff; border: 1px solid var(--sn-line);
  border-radius: 10px;
  transition: all .2s;
}
.sn-link-card:hover {
  border-color: var(--sn-gold); background: var(--sn-gold-pale);
  transform: translateY(-1px);
}
.sn-link-card h4 {
  font-family: var(--sn-font-display);
  font-size: 14px; font-weight: 700; color: var(--sn-ink);
  margin-bottom: 4px;
}
.sn-link-card p { font-size: 12px; color: var(--sn-ink-3); }
.sn-link-card:hover h4 { color: var(--sn-gold-deep); }

.sn-footer {
  background: var(--sn-ink);
  color: rgba(255,255,255,0.7);
  padding: 50px 24px 28px;
}
.sn-footer__inner { max-width: var(--sn-wrap); margin: 0 auto; }
.sn-footer__grid {
  display: grid;
  grid-template-columns: 1.4fr repeat(4, 1fr);
  gap: 32px;
  padding-bottom: 32px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}
.sn-footer__brand {
  font-family: var(--sn-font-display);
  font-size: 17px; font-weight: 700; color: #fff;
  margin-bottom: 10px;
  display: flex; align-items: center; gap: 8px;
}
.sn-footer__brand .sn-brand__mark { width: 28px; height: 28px; font-size: 11px; }
.sn-footer__grid p {
  font-size: 13px; line-height: 1.6; max-width: 280px;
}
.sn-footer__grid h5 {
  color: #fff; font-family: var(--sn-font-display);
  font-size: 13px; font-weight: 700;
  margin-bottom: 12px; letter-spacing: 0.03em;
}
.sn-footer__grid ul { display: flex; flex-direction: column; gap: 7px; }
.sn-footer__grid li a {
  font-size: 13px; color: rgba(255,255,255,0.65);
  transition: color .2s;
}
.sn-footer__grid li a:hover { color: var(--sn-gold); }
.sn-footer__bottom {
  padding-top: 20px;
  display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap;
  font-size: 12px;
  font-family: var(--sn-font-mono);
  color: rgba(255,255,255,0.45);
}

.sn-sticky {
  position: fixed; bottom: 16px; left: 50%;
  transform: translateX(-50%) translateY(120%);
  z-index: 60;
  background: #fff;
  border: 1px solid var(--sn-line);
  border-radius: 50px;
  padding: 8px 8px 8px 18px;
  box-shadow: 0 12px 36px rgba(14,27,58,0.18);
  display: flex; align-items: center; gap: 12px;
  transition: transform .35s ease;
  max-width: calc(100vw - 32px);
}
.sn-sticky.is-visible { transform: translateX(-50%) translateY(0); }
.sn-sticky__label {
  font-size: 13px; font-weight: 600; color: var(--sn-ink);
  white-space: nowrap;
}
.sn-sticky__actions { display: flex; gap: 8px; }
.sn-sticky .sn-btn { padding: 8px 16px; font-size: 13px; }

.sn-reveal { opacity: 0; transform: translateY(24px); transition: opacity .6s ease, transform .6s ease; }
.sn-reveal.is-visible { opacity: 1; transform: translateY(0); }

@media (max-width: 1100px) {
  .sn-grid--4 { grid-template-columns: repeat(2, 1fr); }
  .sn-related { grid-template-columns: repeat(2, 1fr); }
  .sn-speed { grid-template-columns: repeat(3, 1fr); }
  .sn-pack { grid-template-columns: repeat(3, 1fr); }
  .sn-film { grid-template-columns: repeat(3, 1fr); }
  .sn-shelf { grid-template-columns: repeat(3, 1fr); }
  .sn-stack { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 900px) {
  .sn-nav { display: none; }
  .sn-menu-toggle {
    display: inline-flex; align-items: center; justify-content: center;
    width: 38px; height: 38px; border-radius: 8px;
    background: var(--sn-navy-pale); color: var(--sn-navy);
  }
  .sn-nav.is-open {
    display: flex; flex-direction: column;
    position: absolute; top: 100%; right: 24px; left: 24px;
    background: #fff; border: 1px solid var(--sn-line);
    border-radius: 12px; padding: 18px;
    box-shadow: 0 12px 36px rgba(14,27,58,0.12);
  }
  .sn-footer__grid { grid-template-columns: 1fr 1fr; }
  .sn-trust__inner { grid-template-columns: repeat(2, 1fr); }
  .sn-atlas__footer { grid-template-columns: 1fr; }
  .sn-split { grid-template-columns: 1fr; }
  .sn-sample { grid-template-columns: 1fr; text-align: center; }
}
@media (max-width: 600px) {
  .sn-section { padding: 40px 18px; }
  .sn-hero { padding: 36px 18px 28px; }
  .sn-grid--3, .sn-grid--4 { grid-template-columns: 1fr; }
  .sn-related { grid-template-columns: 1fr; }
  .sn-speed { grid-template-columns: repeat(2, 1fr); }
  .sn-pack { grid-template-columns: repeat(2, 1fr); }
  .sn-film { grid-template-columns: repeat(2, 1fr); }
  .sn-shelf { grid-template-columns: repeat(2, 1fr); }
  .sn-stack { grid-template-columns: repeat(2, 1fr); }
  .sn-footer__grid { grid-template-columns: 1fr; gap: 24px; }
  .sn-trust__inner { grid-template-columns: 1fr; }
  .sn-sticky__label { display: none; }
  .sn-sticky { padding: 6px 6px 6px 6px; }
  .sn-sample { padding: 24px; }
  .sn-bread__inner { font-size: 11px; }
  .sn-bread__badge { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; }
  .sn-reveal { opacity: 1; transform: none; }
}