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

html {
  scroll-behavior: smooth;
  overflow-x: hidden;
  width: 100%;
}

.page-product {
  width: 100%;
  max-width: 100%;
  overflow-x: clip;
}

.page-product main {
  width: 100%;
  max-width: 100%;
  overflow-x: clip;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.5;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  overflow-x: clip;
}

.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: 1rem;
}

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

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

button,
input,
select,
textarea {
  font: inherit;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(16px) saturate(160%);
  -webkit-backdrop-filter: blur(16px) saturate(160%);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: max(var(--header-h), calc(var(--logo-h, 52px) + 1.25rem));
  gap: 1rem;
  padding-block: 0.625rem;
}

.logo img,
.logo svg {
  height: var(--logo-h, 52px);
  width: auto;
  max-width: none;
  display: block;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.currency-badge {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-muted);
  padding: 0.35rem 0.65rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  background: var(--samsung-gray-100);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-pill);
  font-weight: 600;
  font-size: 0.9375rem;
  border: none;
  cursor: pointer;
  transition: transform 0.12s ease, background 0.15s ease, box-shadow 0.15s ease;
}

.btn:active {
  transform: scale(0.97);
}

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

.btn-primary:hover {
  background: var(--primary-hover);
}

.btn-outline {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border-strong);
}

.product-subnav {
  position: sticky;
  top: var(--header-h);
  z-index: 90;
  background: #fff;
  border-bottom: 1px solid var(--border);
}

.subnav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: var(--subnav-h);
  gap: 1rem;
}

.subnav-links {
  display: flex;
  gap: 1.5rem;
  overflow-x: auto;
  scrollbar-width: none;
}

.subnav-links::-webkit-scrollbar {
  display: none;
}

.subnav-links a {
  white-space: nowrap;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-muted);
  padding: 0.85rem 0;
  border-bottom: 2px solid transparent;
  transition: color 0.15s, border-color 0.15s;
}

.subnav-links a:hover,
.subnav-links a.active {
  color: var(--text);
  border-bottom-color: var(--text);
}

.subnav-title {
  font-size: 0.875rem;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 280px;
  display: none;
}

.site-footer {
  background: #fff;
  border-top: 1px solid var(--border);
  padding: 3rem 0 1.5rem;
  margin-top: 4rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

.footer-grid h4 {
  font-size: 0.875rem;
  font-weight: 700;
  margin: 0 0 1rem;
}

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

.footer-grid li {
  margin-bottom: 0.5rem;
}

.footer-grid a {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.footer-grid a:hover {
  color: var(--text);
  text-decoration: underline;
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  font-size: 0.75rem;
  color: var(--text-muted);
}

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  align-items: center;
}

.footer-social {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.footer-social a {
  display: flex;
  width: 32px;
  height: 32px;
  align-items: center;
  justify-content: center;
  color: var(--text);
}

.footer-social a:hover {
  opacity: 0.7;
}

.content-page {
  padding: 3rem 0 4rem;
  max-width: 800px;
}

.content-page h1 {
  font-size: 2rem;
  letter-spacing: -0.02em;
  margin: 0 0 1rem;
}

.content-page p {
  color: var(--text-muted);
  line-height: 1.7;
}

.checkout-steps {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  padding: 1.25rem 0;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-dim);
  border-bottom: 1px solid var(--border);
}

.checkout-steps span.active {
  color: var(--text);
}

.checkout-steps .sep {
  opacity: 0.4;
}

@media (min-width: 768px) {
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .footer-grid {
    grid-template-columns: repeat(5, 1fr);
  }

  .subnav-title {
    display: block;
  }
}

@media (max-width: 767px) {
  .header-actions .currency-badge {
    display: none;
  }
}

@media (min-width: 768px) {
  .container {
    padding-inline: 1.5rem;
  }
}

@media (min-width: 1024px) {
  .container {
    padding-inline: 2rem;
  }
}