/* ============================================================
   SockCustom — Global Stylesheet
   Language: English (en) · i18n-ready
   ============================================================ */

/* ---------- CSS Custom Properties ---------- */
:root {
  /* Colors */
  --color-primary: #1A1F2E;
  --color-primary-light: #232B3E;
  --color-white: #ffffff;
  --color-bg-light: #F5F5F7;
  --color-bg-warm: #FAFAFA;
  --color-border: #E5E5E5;
  --color-text-dark: #1A1A1A;
  --color-text-body: #333333;
  --color-text-muted: #666666;
  --color-text-light: #777777;
  --color-footer-link: #B0B8C8;
  --color-accent-green: #1E6F42;
  --color-accent-green-bg: #E8F5EC;
  --color-star: #F5A623;
  --color-danger: #D93025;

  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-h1: 700 clamp(2rem, 4vw, 3rem) / 1.15 var(--font-family);
  --font-h2: 600 clamp(1.6rem, 3vw, 2rem) / 1.25 var(--font-family);
  --font-h3: 600 clamp(1.25rem, 2vw, 1.5rem) / 1.3 var(--font-family);
  --font-h4: 600 1.125rem / 1.4 var(--font-family);
  --font-body: 400 1rem / 1.65 var(--font-family);
  --font-body-sm: 400 0.875rem / 1.6 var(--font-family);
  --font-caption: 400 0.8125rem / 1.5 var(--font-family);
  --font-price: 700 1.5rem / 1.2 var(--font-family);
  --font-price-lg: 700 clamp(1.5rem, 3vw, 1.75rem) / 1.2 var(--font-family);
  --font-nav: 500 0.9375rem / 1 var(--font-family);
  --font-btn: 600 0.9375rem / 1 var(--font-family);

  /* Spacing */
  --section-gap: clamp(3rem, 8vw, 5rem);
  --content-gap: 2rem;
  --card-gap: 1.5rem;
  --card-padding: 2rem;
  --container-padding: clamp(1rem, 4vw, 2.5rem);

  /* Layout */
  --container-max: 1200px;
  --header-height: 4.8rem;

  /* Shadows & Borders */
  --shadow-card: 0 2px 8px rgba(0,0,0,0.06);
  --shadow-card-hover: 0 6px 20px rgba(0,0,0,0.10);
  --shadow-mega: 0 10px 30px rgba(0,0,0,0.10);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-full: 999px;

  /* Transitions */
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --transition-fast: 150ms var(--ease-out);
  --transition-base: 250ms var(--ease-out);
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html {
  overflow-y: scroll; -webkit-text-size-adjust: 100%; }
body {
  font: var(--font-body);
  color: var(--color-text-body);
  background: var(--color-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}
img, video, svg { display: block; max-width: 100%; height: auto; }
img[loading="lazy"] { opacity: 0; transition: opacity 300ms; }
img[loading="lazy"]:is(.loaded, [src]) { opacity: 1; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button, input, select, textarea { font: inherit; color: inherit; border: none; background: none; }
button { cursor: pointer; }

/* ---------- Typography ---------- */
h1, .h1 { font: var(--font-h1); color: var(--color-text-dark); letter-spacing: -0.02em; }
h2, .h2 { font: var(--font-h2); color: var(--color-text-dark); letter-spacing: -0.015em; }
h3, .h3 { font: var(--font-h3); color: var(--color-text-dark); }
h4, .h4 { font: var(--font-h4); color: var(--color-text-dark); }
.text-body { font: var(--font-body); color: var(--color-text-body); }
.text-muted { color: var(--color-text-muted); }
.text-light { color: var(--color-text-light); }
.text-accent { color: var(--color-accent-green); }

/* ---------- Container ---------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}
.container--narrow { max-width: 880px; }
.container--wide { max-width: 1340px; }

/* ---------- Section ---------- */
.section { padding: var(--section-gap) 0; }
.section--tight { padding: calc(var(--section-gap) * 0.5) 0; }
.section--bg-light { background: var(--color-bg-light); }
.section--bg-dark { background: var(--color-primary); color: var(--color-white); }
.section--bg-dark h1, .section--bg-dark h2, .section--bg-dark h3,
.section--bg-dark h4, .section--bg-dark .text-body { color: var(--color-white); }
.section__header { text-align: center; margin-bottom: var(--content-gap); }
.section__header--left { text-align: left; }
.section__tag {
  display: inline-block;
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-accent-green);
  background: var(--color-accent-green-bg);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  margin-bottom: 0.75rem;
}
.section__title { margin-bottom: 0.75rem; }
.section__subtitle { font: var(--font-body); color: var(--color-text-muted); max-width: 650px; margin: 0 auto; }
.section__header--left .section__subtitle { margin: 0; }

/* ---------- Grid ---------- */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--card-gap); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--card-gap); }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--card-gap); }
.grid-5 { display: grid; grid-template-columns: repeat(5, 1fr); gap: var(--card-gap); }

@media (max-width: 1024px) {
  .grid-4, .grid-5 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .grid-2, .grid-3, .grid-4, .grid-5 { grid-template-columns: 1fr; }
}

/* ---------- Card ---------- */
.card {
  background: var(--color-white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: box-shadow var(--transition-base), transform var(--transition-base);
}
.card:hover { box-shadow: var(--shadow-card-hover); transform: translateY(-2px); }
.card__body { padding: var(--card-gap); }
.card__media { position: relative; overflow: hidden; background: var(--color-bg-light); }
.card__media img { width: 100%; height: 100%; object-fit: cover; transition: transform 400ms var(--ease-out); }
.card:hover .card__media img { transform: scale(1.03); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem;
  font: var(--font-btn);
  padding: 0.75rem 1.75rem;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  white-space: nowrap;
  letter-spacing: -0.01em;
}
.btn--primary { background: var(--color-primary); color: var(--color-white); }
.btn--primary:hover { background: var(--color-primary-light); }
.btn--outline { border: 2px solid var(--color-primary); color: var(--color-primary); background: transparent; }
.btn--outline:hover { background: var(--color-primary); color: var(--color-white); }
.btn--green { background: var(--color-accent-green); color: var(--color-white); }
.btn--green:hover { background: #165730; }
.btn--white { background: var(--color-white); color: var(--color-primary); }
.btn--white:hover { background: var(--color-bg-light); }
.btn--sm { padding: 0.5rem 1.25rem; font-size: 0.8125rem; }
.btn--lg { padding: 0.875rem 2.25rem; font-size: 1.0625rem; }
.btn--arrow::after { content: '→'; font-size: 1.1em; margin-left: 2px; transition: transform var(--transition-fast); }
.btn--arrow:hover::after { transform: translateX(3px); }

/* ---------- Link ---------- */
.link-arrow { font-weight: 500; color: var(--color-primary); display: inline-flex; align-items: center; gap: 4px; }
.link-arrow::after { content: '→'; transition: transform var(--transition-fast); }
.link-arrow:hover::after { transform: translateX(3px); }

/* ---------- Badge ---------- */
.badge {
  display: inline-flex; align-items: center;
  font-size: 0.75rem; font-weight: 600;
  padding: 3px 10px; border-radius: var(--radius-full);
}
.badge--green { background: var(--color-accent-green-bg); color: var(--color-accent-green); }
.badge--dark { background: var(--color-primary); color: var(--color-white); }
.badge--bestseller { background: #FFF3E0; color: #E65100; }

/* ---------- Price ---------- */
.price { font: var(--font-price); color: var(--color-text-dark); }
.price--lg { font: var(--font-price-lg); }
.price__prefix { font-size: 0.55em; font-weight: 500; color: var(--color-text-muted); }
.price__suffix { font-size: 0.5em; font-weight: 400; color: var(--color-text-muted); }
.price--strikethrough { text-decoration: line-through; color: var(--color-text-light); font-weight: 400; font-size: 0.9em; }

/* ---------- Star Rating ---------- */
.stars { display: inline-flex; gap: 2px; color: var(--color-star); font-size: 1rem; }
.stars--sm { font-size: 0.8125rem; }

/* ---------- Trust Badges ---------- */
.trust-badges { display: flex; gap: 1rem; flex-wrap: wrap; }
.trust-badge {
  display: flex; align-items: center; gap: 0.5rem;
  padding: 0.5rem 1rem; background: var(--color-white);
  border: 1px solid var(--color-border); border-radius: var(--radius-sm);
  font-size: 0.8125rem; color: var(--color-text-muted);
}
.trust-badge__icon { font-size: 1.25rem; }

/* ---------- Breadcrumb ---------- */
.breadcrumb {
  display: flex; align-items: center; gap: 0.5rem;
  font-size: 0.8125rem; color: var(--color-text-light);
  padding: 1rem var(--container-padding); flex-wrap: wrap;
  max-width: var(--container-max); margin: 0 auto;
}
.breadcrumb a { color: var(--color-text-light); }
.breadcrumb a:hover { color: var(--color-primary); }
.breadcrumb__sep { font-size: 0.7em; }

/* ---------- Divider ---------- */
.divider { border: none; height: 1px; background: var(--color-border); margin: var(--content-gap) 0; }

/* ---------- Utility ---------- */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-sm { font-size: 0.875rem; }
.text-xs { font-size: 0.75rem; }
.font-bold { font-weight: 700; }
.font-semibold { font-weight: 600; }
.mt-1 { margin-top: 1rem; }
.mt-2 { margin-top: 2rem; }
.mb-1 { margin-bottom: 1rem; }
.mb-2 { margin-bottom: 2rem; }
.gap-1 { gap: 1rem; }
.gap-2 { gap: 2rem; }
.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.flex-wrap { flex-wrap: wrap; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.hidden { display: none !important; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0,0,0,0); }

/* ---------- Sock Color Dots ---------- */
.color-dots { display: flex; gap: 6px; flex-wrap: wrap; }
.color-dot {
  width: 20px; height: 20px; border-radius: 50%;
  border: 2px solid transparent; cursor: pointer; transition: border-color 150ms;
}
.color-dot:hover, .color-dot.active { border-color: var(--color-primary); }

/* ---------- Responsive Helpers ---------- */
@media (max-width: 768px) {
  .hide-mobile { display: none !important; }
  .section { padding: 3rem 0; }
}
@media (min-width: 769px) {
  .hide-desktop { display: none !important; }
}

/* ---------- Skeleton Loading ---------- */
@keyframes shimmer { 100% { transform: translateX(100%); } }
.skeleton {
  position: relative; overflow: hidden; background: var(--color-bg-light); border-radius: var(--radius-sm);
}
.skeleton::after {
  content: ''; position: absolute; inset: 0;
  transform: translateX(-100%);
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.5), transparent);
  animation: shimmer 1.5s infinite;
}

/* ---------- Focus ---------- */
:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 2px; }

/* ---------- Selection ---------- */
::selection { background: var(--color-primary); color: var(--color-white); }

/* ---------- Print ---------- */
@media print {
  .header, .footer, .btn { display: none !important; }
  body { font-size: 12pt; color: #000; }
}