:root {
  --bg: #ffffff;
  --soft: #f7f8fb;
  --soft2: #eef3ff;
  --dark: #050816;
  --dark2: #0f172a;
  --text: #111827;
  --muted: #64748b;
  --line: #e5e7eb;
  --gold: #f6c453;
  --cyan: #48cae4;
  --green: #6a994e;
  --radius: 24px;
  --shadow: 0 24px 60px rgba(15, 23, 42, 0.12);
  --max: 1220px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
}

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

a {
  color: inherit;
  text-decoration: none;
}

.container {
  width: min(var(--max), calc(100% - 32px));
  margin: 0 auto;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 10px;
  background: #000;
  color: #fff;
  padding: 10px 14px;
  border-radius: 10px;
  z-index: 999;
}

.skip-link:focus {
  left: 10px;
}

.top-announcement {
  background: linear-gradient(90deg, #050816, #10213f);
  color: #dbeafe;
  font-size: 13px;
  padding: 8px 0;
}

.top-announcement .container {
  display: flex;
  gap: 10px;
  justify-content: center;
  flex-wrap: wrap;
}

.top-announcement span {
  color: var(--gold);
  font-weight: 900;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(14px);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  min-height: 76px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 900;
}

.brand-logo {
  width: 46px;
  height: 46px;
  border-radius: 16px;
  display: grid;
  place-items: center;
  color: var(--gold);
  background: linear-gradient(145deg, #050816, #203a66);
  box-shadow: 0 14px 28px rgba(15, 23, 42, 0.18);
}

.brand-text {
  font-size: 22px;
  letter-spacing: -0.05em;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 4px;
}

.main-nav a {
  padding: 9px 12px;
  border-radius: 999px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 800;
}

.main-nav a:hover {
  background: var(--soft);
  color: var(--text);
}

.header-cta {
  display: flex;
  gap: 8px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-size: 14px;
  font-weight: 900;
  cursor: pointer;
  transition: 0.22s ease;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-dark {
  background: var(--dark);
  color: #fff;
}

.btn-ghost {
  background: #fff;
  border-color: var(--line);
  color: var(--text);
}

.btn-primary {
  background: linear-gradient(145deg, #050816, #15294e);
  color: #fff;
  box-shadow: 0 16px 34px rgba(15, 23, 42, 0.2);
}

.btn-secondary {
  background: linear-gradient(145deg, var(--gold), #e6a91b);
  color: #111827;
  box-shadow: 0 16px 34px rgba(246, 196, 83, 0.25);
}

.btn-light {
  background: #fff;
  color: var(--dark);
}

.btn-outline-light {
  border-color: rgba(255, 255, 255, 0.4);
  color: #fff;
}

.btn-wide {
  width: 100%;
}

.product-hero {
  padding: 52px 0 58px;
  background:
    radial-gradient(circle at top left, rgba(72, 202, 228, 0.18), transparent 34%),
    radial-gradient(circle at bottom right, rgba(246, 196, 83, 0.20), transparent 34%),
    linear-gradient(180deg, #ffffff, #f7f8fb);
}

.product-grid {
  display: grid;
  grid-template-columns: 1fr 0.92fr;
  gap: 34px;
  align-items: start;
}

.product-gallery {
  position: sticky;
  top: 100px;
}

.gallery-main {
  position: relative;
  overflow: hidden;
  border-radius: 34px;
  background:
    linear-gradient(145deg, rgba(5, 8, 22, 0.96), rgba(25, 42, 80, 0.96));
  min-height: 560px;
  display: grid;
  place-items: center;
  box-shadow: var(--shadow);
  border: 1px solid rgba(72, 202, 228, 0.25);
}

.gallery-main img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.gallery-main::after {
  content: "";
  position: absolute;
  inset: 18px;
  border-radius: 24px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  pointer-events: none;
}

.gallery-badge {
  position: absolute;
  left: 24px;
  top: 24px;
  padding: 9px 14px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.92);
  color: var(--dark);
  font-weight: 900;
  font-size: 13px;
}

.gallery-thumbs {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  margin-top: 14px;
}

.thumb-card {
  min-height: 88px;
  border-radius: 18px;
  border: 1px solid var(--line);
  background: #fff;
  padding: 14px;
  box-shadow: 0 12px 26px rgba(15, 23, 42, 0.06);
}

.thumb-card span {
  display: block;
  color: var(--muted);
  font-size: 12px;
  font-weight: 900;
}

.thumb-card strong {
  display: block;
  margin-top: 5px;
  font-size: 14px;
  line-height: 1.3;
}

.product-info {
  padding-top: 8px;
}

.breadcrumb-mini {
  display: flex;
  gap: 8px;
  color: var(--muted);
  font-size: 13px;
  margin-bottom: 18px;
}

.breadcrumb-mini a {
  font-weight: 800;
  color: var(--dark);
}

.eyebrow {
  margin: 0 0 10px;
  color: #a16207;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 900;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 18px;
  font-size: clamp(44px, 7vw, 78px);
  line-height: 0.95;
  letter-spacing: -0.08em;
}

h2 {
  margin-bottom: 14px;
  font-size: clamp(30px, 4vw, 48px);
  line-height: 1.08;
  letter-spacing: -0.05em;
}

h3 {
  margin-bottom: 10px;
  font-size: 22px;
  line-height: 1.25;
  letter-spacing: -0.03em;
}

.product-subtitle {
  color: var(--muted);
  font-size: 18px;
  max-width: 720px;
}

.rating-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 18px 0 20px;
  color: var(--muted);
}

.stars {
  color: #f59e0b;
  letter-spacing: 2px;
}

.rating-row strong {
  color: var(--text);
}

.product-card {
  border-radius: 30px;
  background: #fff;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  padding: 26px;
}

.price-box {
  border-radius: 22px;
  padding: 20px;
  background:
    radial-gradient(circle at top right, rgba(72, 202, 228, 0.18), transparent 35%),
    linear-gradient(145deg, #050816, #10213f);
  color: #fff;
  margin-bottom: 18px;
}

.price-label {
  color: #bcd7ff;
  display: block;
  font-size: 13px;
  font-weight: 800;
}

.price-value {
  display: block;
  font-size: 36px;
  line-height: 1.1;
  letter-spacing: -0.05em;
  margin-top: 4px;
}

.price-note {
  color: #cbd5e1;
  display: block;
  margin-top: 6px;
  font-size: 14px;
}

.spec-list {
  border: 1px solid var(--line);
  border-radius: 20px;
  overflow: hidden;
  margin-bottom: 18px;
}

.spec-row {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  padding: 13px 16px;
  border-bottom: 1px solid var(--line);
}

.spec-row:last-child {
  border-bottom: 0;
}

.spec-row span {
  color: var(--muted);
}

.spec-row strong {
  text-align: right;
}

.cta-stack {
  display: grid;
  gap: 10px;
}

.secure-note {
  color: var(--muted);
  font-size: 13px;
  text-align: center;
  margin: 14px 0 0;
}

.trust-strip {
  margin-top: 16px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}

.trust-strip div {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 15px;
  box-shadow: 0 12px 26px rgba(15, 23, 42, 0.05);
}

.trust-strip strong,
.trust-strip span {
  display: block;
}

.trust-strip strong {
  color: var(--dark);
}

.trust-strip span {
  color: var(--muted);
  font-size: 13px;
}

.anchor-nav {
  position: sticky;
  top: 76px;
  z-index: 40;
  background: rgba(255, 255, 255, 0.96);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(12px);
}

.anchor-inner {
  display: flex;
  gap: 10px;
  overflow-x: auto;
  padding: 12px 0;
}

.anchor-inner a {
  flex: 0 0 auto;
  padding: 9px 14px;
  border-radius: 999px;
  background: var(--soft);
  border: 1px solid var(--line);
  color: var(--dark);
  font-size: 14px;
  font-weight: 900;
}

.section {
  padding: 74px 0;
}

.section-head {
  max-width: 820px;
  margin-bottom: 30px;
}

.section-head.center {
  text-align: center;
  margin-left: auto;
  margin-right: auto;
}

.section-head p {
  color: var(--muted);
}

.feature-section,
.guide-section,
.review-section {
  background: #fff;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.feature-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 24px;
  padding: 24px;
  box-shadow: 0 18px 42px rgba(15, 23, 42, 0.06);
}

.icon-box {
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  border-radius: 16px;
  background: #fff7df;
  color: #a16207;
  font-weight: 900;
  margin-bottom: 16px;
}

.feature-card p,
.promo-card p,
.step-card p,
.review-card p {
  color: var(--muted);
}

.security-section,
.bonus-section,
.article-section,
.faq-section {
  background: var(--soft);
}

.split-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 18px;
  align-items: stretch;
}

.content-panel,
.check-panel {
  border-radius: 30px;
  padding: 34px;
  box-shadow: var(--shadow);
}

.dark-panel {
  background:
    radial-gradient(circle at top left, rgba(72, 202, 228, 0.22), transparent 34%),
    linear-gradient(145deg, #050816, #10213f);
  color: #fff;
}

.dark-panel p {
  color: #cbd5e1;
}

.inline-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.check-panel {
  background: #fff;
  border: 1px solid var(--line);
}

.check-list {
  list-style: none;
  padding: 0;
  margin: 18px 0 0;
}

.check-list li {
  position: relative;
  padding: 12px 0 12px 32px;
  border-bottom: 1px solid var(--line);
  color: #334155;
}

.check-list li:last-child {
  border-bottom: 0;
}

.check-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 12px;
  width: 22px;
  height: 22px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: #dcfce7;
  color: #166534;
  font-weight: 900;
  font-size: 13px;
}

.promo-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr 0.8fr;
  gap: 16px;
}

.promo-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 24px;
  padding: 24px;
  box-shadow: 0 18px 42px rgba(15, 23, 42, 0.06);
}

.big-promo {
  grid-row: span 2;
  background:
    radial-gradient(circle at top right, rgba(246, 196, 83, 0.20), transparent 34%),
    #fff;
}

.promo-label {
  display: inline-flex;
  padding: 6px 11px;
  border-radius: 999px;
  background: #ecfeff;
  color: #0e7490;
  font-size: 12px;
  font-weight: 900;
  margin-bottom: 14px;
}

.promo-card a {
  display: inline-flex;
  margin-top: 10px;
  font-weight: 900;
  color: var(--dark);
  border-bottom: 2px solid var(--gold);
}

.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.step-card {
  position: relative;
  overflow: hidden;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 24px;
  padding: 26px;
  box-shadow: 0 18px 42px rgba(15, 23, 42, 0.06);
}

.step-card span {
  display: inline-grid;
  place-items: center;
  width: 46px;
  height: 46px;
  border-radius: 16px;
  background: var(--dark);
  color: #fff;
  font-weight: 900;
  margin-bottom: 18px;
}

.article-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.45fr;
  gap: 18px;
  align-items: start;
}

.seo-article,
.side-summary {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 28px;
  padding: 30px;
  box-shadow: 0 18px 42px rgba(15, 23, 42, 0.06);
}

.seo-article p {
  color: #334155;
  font-size: 16px;
}

.side-summary {
  position: sticky;
  top: 146px;
}

.summary-row {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 13px 0;
  border-bottom: 1px solid var(--line);
}

.summary-row:last-child {
  border-bottom: 0;
}

.summary-row span {
  color: var(--muted);
}

.summary-row strong {
  text-align: right;
}

.review-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.review-card {
  background:
    radial-gradient(circle at top right, rgba(72, 202, 228, 0.12), transparent 35%),
    #fff;
  border: 1px solid var(--line);
  border-radius: 24px;
  padding: 24px;
  box-shadow: 0 18px 42px rgba(15, 23, 42, 0.06);
}

.review-top {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}

.review-top span {
  color: #f59e0b;
  white-space: nowrap;
}

.faq-grid {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 22px;
  align-items: start;
}

.faq-intro p {
  color: var(--muted);
}

.faq-list details {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 18px 20px;
  margin-bottom: 12px;
  box-shadow: 0 12px 30px rgba(15, 23, 42, 0.05);
}

.faq-list summary {
  cursor: pointer;
  font-weight: 900;
}

.faq-list p {
  color: var(--muted);
  margin-top: 12px;
  margin-bottom: 0;
}

.final-cta {
  padding: 70px 0;
  background: #fff;
}

.final-box {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 22px;
  border-radius: 32px;
  padding: 34px;
  background:
    radial-gradient(circle at top left, rgba(72, 202, 228, 0.22), transparent 32%),
    linear-gradient(145deg, #050816, #10213f);
  color: #fff;
  box-shadow: var(--shadow);
}

.final-box p {
  color: #cbd5e1;
  margin-bottom: 0;
}

.final-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.site-footer {
  background: #020617;
  color: #cbd5e1;
  padding: 50px 0 96px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 26px;
}

.footer-brand p {
  color: #94a3b8;
}

.footer-logo {
  color: #fff;
  margin-bottom: 14px;
}

.site-footer h3 {
  color: #fff;
  font-size: 18px;
}

.site-footer ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.site-footer li {
  margin: 8px 0;
}

.site-footer a {
  color: #cbd5e1;
}

.site-footer a:hover {
  color: #fff;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.10);
  margin-top: 32px;
  padding-top: 18px;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  color: #94a3b8;
  font-size: 14px;
}

.mobile-sticky {
  display: none;
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 70;
  grid-template-columns: repeat(4, 1fr);
  gap: 6px;
  padding: 8px 8px calc(8px + env(safe-area-inset-bottom));
  background: rgba(5, 8, 22, 0.96);
  backdrop-filter: blur(12px);
}

.mobile-sticky a {
  color: #fff;
  text-align: center;
  padding: 9px 4px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.08);
  font-size: 12px;
  font-weight: 900;
}

@media (max-width: 1020px) {
  .main-nav {
    display: none;
  }

  .product-grid,
  .split-grid,
  .article-grid,
  .faq-grid {
    grid-template-columns: 1fr;
  }

  .product-gallery,
  .side-summary {
    position: static;
  }

  .feature-grid,
  .steps,
  .review-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .promo-grid {
    grid-template-columns: 1fr 1fr;
  }

  .big-promo {
    grid-row: auto;
    grid-column: span 2;
  }

  .gallery-main {
    min-height: 430px;
  }
}

@media (max-width: 680px) {
  .container {
    width: min(100% - 24px, var(--max));
  }

  .header-inner {
    min-height: 66px;
  }

  .brand-logo {
    width: 40px;
    height: 40px;
    border-radius: 14px;
  }

  .brand-text {
    font-size: 18px;
  }

  .header-cta {
    display: none;
  }

  .product-hero {
    padding: 34px 0 42px;
  }

  h1 {
    font-size: 42px;
  }

  h2 {
    font-size: 30px;
  }

  .gallery-main {
    min-height: 330px;
    border-radius: 24px;
  }

  .gallery-thumbs,
  .feature-grid,
  .steps,
  .review-grid,
  .promo-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .big-promo {
    grid-column: auto;
  }

  .product-card,
  .content-panel,
  .check-panel,
  .seo-article,
  .side-summary,
  .final-box {
    padding: 22px;
    border-radius: 22px;
  }

  .trust-strip {
    grid-template-columns: 1fr;
  }

  .final-box {
    flex-direction: column;
    align-items: flex-start;
  }

  .footer-bottom {
    flex-direction: column;
  }

  .mobile-sticky {
    display: grid;
  }

  .anchor-nav {
    top: 66px;
  }
}