/* Base typography, container, buttons and shared shell (header/footer/nav) */

body {
  font-family: var(--font-base);
  color: var(--color-dark);
  background: var(--color-secondary);
  font-size: 16px;
}

h1, h2, h3, h4 {
  font-weight: 700;
  color: var(--color-dark);
}

h1 { font-size: clamp(2rem, 1.5rem + 2vw, 2.75rem); line-height: 1.15; }
h2 { font-size: clamp(1.5rem, 1.3rem + 1vw, 2rem); line-height: 1.2; }
h3 { font-size: 1.125rem; line-height: 1.3; }

p {
  color: var(--color-secondary-text-bolder);
}

.container {
  width: 100%;
  padding-inline: var(--space-3);
}

/* restricted width */
.r-width {
    margin-inline: auto;
  max-width: var(--container-width);
}

.section {
  padding-block: var(--space-6);
}

.section-head {
  text-align: center;
  max-width: 640px;
  margin-inline: auto;
  margin-bottom: var(--space-4);
}

.section-head p {
  margin-top: var(--space-1);
}

.eyebrow {
  display: inline-block;
  color: var(--color-primary);
  font-weight: 700;
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: var(--space-1);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 13px 22px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.95rem;
  white-space: nowrap;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}

.btn svg, .btn img { flex-shrink: 0; }

.btn--primary {
  background: var(--gradient-primary);
  color: var(--color-secondary);
  box-shadow: var(--shadow-sm);
}

.btn--primary:hover {
  background: var(--gradient-shade);
  box-shadow: var(--shadow-md);
}

.btn--outline {
  background: var(--color-secondary);
  color: var(--color-dark);
  border: 1.5px solid var(--color-lighter);
}

.btn--outline:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.btn--sm {
  padding: 9px 16px;
  font-size: 0.85rem;
}

[id] {
  scroll-margin-top: var(--header-height);
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
  background: var(--color-secondary);
  border-bottom: 1px solid var(--color-lighter);
}

.header__inner {
  height: 100%;
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-right: auto;
}

.brand__text {
  display: flex;
  flex-direction: column;
  line-height: 1.25;
}

.brand__name {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--color-dark);
}

.brand__name-zh {
  font-size: 0.75rem;
  color: var(--color-secondary-text);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.site-nav a {
  font-weight: 600;
  font-size: 0.92rem;
  color: var(--color-dark);
}

.site-nav a:hover {
  color: var(--color-primary);
}

.header__actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.lang-switch {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  font-weight: 600;
}

.lang-switch__btn {
  color: var(--color-secondary-text-bolder);
  padding: 4px 2px;
}

.lang-switch__btn.is-active {
  color: var(--color-primary);
}

.lang-switch__sep {
  color: var(--color-lighter);
}

.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 32px;
  height: 32px;
}

.nav-toggle img {
  flex-shrink: 0;
}

/* Footer */
.site-footer {
  background: var(--gradient-dark);
  color: var(--color-light);
  padding-block: var(--space-4) var(--space-3);
}

.footer__inner {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--space-3);
  flex-wrap: wrap;
  padding-bottom: var(--space-3);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer__brand {
  display: flex;
  gap: 12px;
}

.footer__brand .brand__name {
  color: var(--color-secondary);
}

.footer__brand .brand__name-zh {
  color: var(--color-light);
}

.footer__meta p {
  color: var(--color-light);
  font-size: 0.9rem;
}

.footer__bottom {
  padding-top: var(--space-2);
  font-size: 0.82rem;
  color: var(--color-secondary-text);
}

/* Badges */
.badge {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 700;
}

.badge--in-stock {
  background: var(--primary-tint-14);
  color: var(--color-primary);
}

.badge--preorder {
  background: var(--color-gold);
  color: var(--color-dark);
}