/* ============================================================
   RangLoop — Main Stylesheet
   ============================================================
   Sections:
   01. Google Fonts Import
   02. CSS Variables
   03. Reset & Base
   04. Typography
   05. Header
   06. Category Filter
   07. Product Grid
   08. Product Card
   09. Product Detail Page
   10. Image Gallery
   11. Order Button & Modal
   12. Footer
   13. Utilities
   14. Media Queries
   ============================================================ */


/* ============================================================
   01. Google Fonts Import
   ============================================================ */
@import url('https://fonts.googleapis.com/css2?family=DM+Sans:ital,opsz,wght@0,9..40,300;0,9..40,400;0,9..40,500;0,9..40,600;0,9..40,700;1,9..40,400&display=swap');


/* ============================================================
   02. CSS Variables
   ============================================================ */
:root {
  --black:  #0A0A0A;
  --white:  #FFFFFF;
  --orange: #FF5C00;
  --grey:   #888888;
  --border: #E0E0E0;
  --bg-subtle: #F8F8F8;

  --font: 'DM Sans', system-ui, sans-serif;

  --space-xs: 8px;
  --space-sm: 16px;
  --space-md: 24px;
  --space-lg: 40px;
  --space-xl: 64px;

  --max-width: 1200px;
  --card-radius: 4px;
  --transition: 0.18s ease;
}


/* ============================================================
   03. Reset & Base
   ============================================================ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font);
  background-color: var(--white);
  color: var(--black);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

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

button {
  font-family: var(--font);
  cursor: pointer;
  border: none;
  background: none;
}

ul {
  list-style: none;
}


/* ============================================================
   04. Typography
   ============================================================ */
h1 { font-size: clamp(1.6rem, 4vw, 2.25rem); font-weight: 700; letter-spacing: -0.5px; }
h2 { font-size: clamp(1.25rem, 3vw, 1.75rem); font-weight: 600; }
h3 { font-size: 1.1rem; font-weight: 600; }

.tag {
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--grey);
}


/* ============================================================
   05. Header
   ============================================================ */
.site-header {
  padding: var(--space-md) var(--space-lg);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-md);
}

.header-brand .wordmark {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.5px;
  color: var(--black);
  line-height: 1;
}

.header-brand .tagline {
  margin-top: 4px;
  font-size: 0.82rem;
  color: var(--grey);
  font-weight: 400;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding-top: 2px;
}

.ig-link {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.82rem;
  color: var(--grey);
  transition: color var(--transition);
}

.ig-link:hover {
  color: var(--black);
}

.ig-link svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}


/* ============================================================
   06. Category Filter
   ============================================================ */
.category-filter {
  padding: var(--space-md) var(--space-lg);
  border-bottom: 1px solid var(--border);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.filter-list {
  display: flex;
  gap: var(--space-md);
  min-width: max-content;
}

.filter-btn {
  font-size: 0.9rem;
  font-weight: 400;
  color: var(--grey);
  padding: 4px 0;
  border-bottom: 2px solid transparent;
  transition: color var(--transition), border-color var(--transition);
  white-space: nowrap;
  letter-spacing: 0.01em;
}

.filter-btn:hover {
  color: var(--black);
}

.filter-btn.active {
  color: var(--black);
  font-weight: 600;
  border-bottom-color: var(--black);
}


/* ============================================================
   07. Product Grid
   ============================================================ */
.catalog-section {
  flex: 1;
  padding: var(--space-lg);
  max-width: var(--max-width);
  width: 100%;
  margin: 0 auto;
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg) var(--space-md);
}

.product-grid.empty {
  display: block;
}

.empty-state {
  text-align: center;
  padding: var(--space-xl) 0;
  color: var(--grey);
  font-size: 0.95rem;
}


/* ============================================================
   08. Product Card
   ============================================================ */
.product-card {
  cursor: pointer;
  text-decoration: none;
  color: var(--black);
  display: block;
  transition: box-shadow var(--transition);
  border-radius: var(--card-radius);
  overflow: hidden;
}

.product-card:hover {
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.09);
}

.card-image-wrap {
  aspect-ratio: 3 / 4;
  background-color: var(--bg-subtle);
  overflow: hidden;
  border-radius: var(--card-radius);
  border: 1px solid var(--border);
}

.card-image-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.product-card:hover .card-image-wrap img {
  transform: scale(1.03);
}

/* Placeholder shown when no image is available */
.card-image-wrap .img-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--border);
}

.card-image-wrap .img-placeholder svg {
  width: 40px;
  height: 40px;
}

.card-body {
  padding: 12px 2px 0;
}

.card-category {
  display: block;
  margin-bottom: 4px;
}

.card-name {
  font-size: 0.97rem;
  font-weight: 600;
  line-height: 1.3;
  margin-bottom: 4px;
}

.card-price {
  font-size: 0.9rem;
  color: var(--black);
  font-weight: 500;
}


/* ============================================================
   09. Product Detail Page
   ============================================================ */
.detail-container {
  flex: 1;
  padding: var(--space-md) var(--space-lg);
  max-width: var(--max-width);
  width: 100%;
  margin: 0 auto;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  color: var(--grey);
  margin-bottom: var(--space-lg);
  transition: color var(--transition);
}

.back-link:hover {
  color: var(--black);
}

.product-detail {
  display: flex;
  gap: var(--space-xl);
  align-items: flex-start;
}

/* Product Info (right side) */
.product-info {
  flex: 0 0 380px;
  position: sticky;
  top: var(--space-lg);
}

.product-info .detail-category {
  display: block;
  margin-bottom: var(--space-xs);
}

.product-info .detail-name {
  font-size: clamp(1.4rem, 3vw, 2rem);
  font-weight: 700;
  line-height: 1.15;
  margin-bottom: var(--space-sm);
  letter-spacing: -0.5px;
}

.product-info .detail-price {
  font-size: 1.35rem;
  font-weight: 600;
  margin-bottom: var(--space-md);
}

.detail-divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: var(--space-md) 0;
}

.detail-sizes {
  margin-bottom: var(--space-md);
}

.detail-sizes .sizes-label {
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--grey);
  margin-bottom: 10px;
  display: block;
}

.sizes-row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

/* Size chip — selectable button */
.size-chip {
  padding: 7px 16px;
  border: 1.5px solid var(--border);
  border-radius: 2px;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--black);
  background: var(--white);
  cursor: pointer;
  font-family: var(--font);
  transition: border-color var(--transition), background-color var(--transition), color var(--transition);
  user-select: none;
}

.size-chip:hover {
  border-color: #999;
}

.size-chip.selected {
  background: var(--black);
  color: var(--white);
  border-color: var(--black);
}

.size-chip.selected:hover {
  background: #333;
  border-color: #333;
}

/* Shake animation — plays when user clicks Order without selecting a size */
@keyframes shake {
  0%, 100% { transform: translateX(0); }
  20%       { transform: translateX(-6px); }
  40%       { transform: translateX(6px); }
  60%       { transform: translateX(-4px); }
  80%       { transform: translateX(4px); }
}

.sizes-row.shake {
  animation: shake 0.38s ease;
}

.size-required-hint {
  font-size: 0.78rem;
  color: #cc2200;
  margin-top: 6px;
  display: none;
}

.size-required-hint.visible {
  display: block;
}

.detail-description {
  font-size: 0.92rem;
  color: #333;
  line-height: 1.7;
  margin-bottom: var(--space-md);
}

/* Order section */
.order-section {
  margin-top: var(--space-md);
}

.order-heading {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: var(--space-sm);
}

.btn-order {
  display: block;
  width: 100%;
  padding: 16px 24px;
  background-color: var(--orange);
  color: var(--white);
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  border-radius: var(--card-radius);
  text-align: center;
  transition: background-color var(--transition), transform var(--transition);
  cursor: pointer;
}

.btn-order:hover {
  background-color: #e05200;
  transform: translateY(-1px);
}

.btn-order:active {
  transform: translateY(0);
}

.order-note {
  margin-top: 10px;
  font-size: 0.78rem;
  color: var(--grey);
  text-align: center;
  line-height: 1.5;
}


/* ============================================================
   10. Image Gallery
   ============================================================ */
.image-gallery {
  flex: 1;
  min-width: 0;
}

.gallery-main {
  aspect-ratio: 3 / 4;
  background-color: var(--bg-subtle);
  border: 1px solid var(--border);
  border-radius: var(--card-radius);
  overflow: hidden;
  margin-bottom: var(--space-sm);
}

.gallery-main img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: opacity 0.2s ease;
}

.gallery-main img.fading {
  opacity: 0;
}

.gallery-thumbs {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.thumb {
  width: 72px;
  height: 72px;
  border: 2px solid var(--border);
  border-radius: var(--card-radius);
  overflow: hidden;
  cursor: pointer;
  transition: border-color var(--transition);
  flex-shrink: 0;
}

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

.thumb.active {
  border-color: var(--black);
}

.thumb:hover {
  border-color: var(--grey);
}

.thumb.active:hover {
  border-color: var(--black);
}


/* ============================================================
   11. Order Button & Modal
   ============================================================ */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.45);
  z-index: 1000;
  align-items: center;
  justify-content: center;
  padding: var(--space-md);
}

.modal-overlay.visible {
  display: flex;
}

.modal-box {
  background: var(--white);
  border: 1px solid var(--black);
  border-radius: var(--card-radius);
  width: 100%;
  max-width: 440px;
  padding: var(--space-lg);
  position: relative;
  animation: modal-in 0.2s ease;
}

@keyframes modal-in {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

.modal-close {
  position: absolute;
  top: 16px;
  right: 20px;
  font-size: 1.4rem;
  color: var(--grey);
  cursor: pointer;
  line-height: 1;
  transition: color var(--transition);
}

.modal-close:hover {
  color: var(--black);
}

.modal-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.modal-subtitle {
  font-size: 0.85rem;
  color: var(--grey);
  margin-bottom: var(--space-md);
}

.modal-message-wrap {
  position: relative;
  margin-bottom: var(--space-sm);
}

.modal-message {
  width: 100%;
  padding: var(--space-sm);
  font-family: var(--font);
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--black);
  background: var(--bg-subtle);
  border: 1px solid var(--border);
  border-radius: var(--card-radius);
  resize: none;
  min-height: 100px;
}

.btn-copy {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  padding: 13px 20px;
  background: var(--black);
  color: var(--white);
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: var(--card-radius);
  justify-content: center;
  transition: background-color var(--transition);
}

.btn-copy:hover {
  background-color: #333;
}

.btn-copy.copied {
  background-color: #1a7a40;
}

.modal-hint {
  margin-top: var(--space-sm);
  font-size: 0.78rem;
  color: var(--grey);
  text-align: center;
}


/* ============================================================
   12. Footer
   ============================================================ */
.site-footer {
  border-top: 1px solid var(--border);
  padding: var(--space-md) var(--space-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  flex-wrap: wrap;
}

.footer-copy {
  font-size: 0.82rem;
  color: var(--grey);
}

.footer-ig {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.82rem;
  color: var(--grey);
  transition: color var(--transition);
}

.footer-ig:hover {
  color: var(--black);
}

.footer-ig svg {
  width: 16px;
  height: 16px;
}


/* ============================================================
   13. Utilities
   ============================================================ */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
}

.not-found {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--space-xl) var(--space-lg);
  gap: var(--space-sm);
}

.not-found h2 { color: var(--grey); }
.not-found p  { color: var(--grey); font-size: 0.9rem; }


/* ============================================================
   14. Media Queries
   ============================================================ */

/* Tablet */
@media (max-width: 960px) {
  .product-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .product-detail {
    gap: var(--space-lg);
  }

  .product-info {
    flex: 0 0 300px;
  }
}

/* Mobile landscape / large phone */
@media (max-width: 768px) {
  .site-header {
    padding: var(--space-sm);
  }

  .category-filter {
    padding: var(--space-sm);
  }

  .catalog-section {
    padding: var(--space-md) var(--space-sm);
  }

  .detail-container {
    padding: var(--space-sm);
  }

  .product-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md) var(--space-sm);
  }

  .product-detail {
    flex-direction: column;
    gap: var(--space-md);
  }

  .product-info {
    flex: none;
    width: 100%;
    position: static;
  }

  .site-footer {
    padding: var(--space-sm);
  }
}

/* Small phone */
@media (max-width: 480px) {
  .product-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-sm) var(--space-xs);
  }

  .thumb {
    width: 58px;
    height: 58px;
  }

  .btn-order {
    padding: 18px 24px;
    font-size: 1rem;
  }

  .site-footer {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-xs);
  }

  .modal-box {
    padding: var(--space-md);
  }
}