/* =========================================
   GabeChic Safety Keychain Builder — Styles
   Mobile-first responsive design
   ========================================= */

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

:root {
  --color-primary: #d4a0a0;
  --color-primary-dark: #b87878;
  --color-primary-light: #f0dada;
  --color-accent: #8b6f6f;
  --color-bg: #fdf8f8;
  --color-white: #ffffff;
  --color-text: #3d2c2c;
  --color-text-light: #7a6363;
  --color-border: #e8d4d4;
  --color-success: #6aaa64;
  --color-error: #c0392b;
  --font-heading: 'Playfair Display', Georgia, serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.12);
  --transition: 0.2s ease;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.5;
  min-height: 100vh;
  padding-bottom: 120px; /* space for sticky summary */
}

.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 16px;
}

/* --- Demo Banner --- */
.demo-banner {
  background: #fff3cd;
  color: #856404;
  text-align: center;
  padding: 8px 16px;
  font-size: 0.85rem;
  font-weight: 500;
}

/* --- Header --- */
.site-header {
  background: var(--color-white);
  border-bottom: 2px solid var(--color-primary-light);
  padding: 20px 0;
  text-align: center;
}

.site-title {
  font-family: var(--font-heading);
  font-size: 1.6rem;
  color: var(--color-accent);
  font-weight: 700;
  letter-spacing: 0.02em;
}

.site-subtitle {
  font-size: 0.95rem;
  color: var(--color-text-light);
  margin-top: 4px;
  font-weight: 500;
}

/* --- Progress Bar --- */
.progress-bar-wrap {
  padding: 24px 0 8px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.progress-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  min-width: 500px;
}

.progress-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  flex-shrink: 0;
}

.progress-dot {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--color-border);
  color: var(--color-text-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  font-weight: 600;
  transition: var(--transition);
}

.progress-step.active .progress-dot {
  background: var(--color-primary);
  color: var(--color-white);
  box-shadow: 0 0 0 4px var(--color-primary-light);
}

.progress-step.completed .progress-dot {
  background: var(--color-success);
  color: var(--color-white);
}

.progress-label {
  font-size: 0.65rem;
  color: var(--color-text-light);
  text-align: center;
  max-width: 70px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.progress-step.active .progress-label {
  color: var(--color-primary-dark);
  font-weight: 600;
}

.progress-line {
  width: 32px;
  height: 2px;
  background: var(--color-border);
  flex-shrink: 0;
  margin: 0 4px;
  margin-bottom: 18px; /* align with dot center */
}

.progress-line.completed {
  background: var(--color-success);
}

/* --- Step Title --- */
.step-title {
  font-family: var(--font-heading);
  font-size: 1.35rem;
  text-align: center;
  padding: 16px 0 12px;
  color: var(--color-accent);
}

/* --- Tier Tabs (Accessories) --- */
.tier-tabs {
  display: flex;
  justify-content: center;
  gap: 8px;
  padding: 0 0 16px;
  flex-wrap: wrap;
}

.tier-tab {
  padding: 8px 20px;
  border: 2px solid var(--color-border);
  border-radius: 24px;
  background: var(--color-white);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

.tier-tab:hover {
  border-color: var(--color-primary);
  background: var(--color-primary-light);
}

.tier-tab.active {
  background: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
}

/* --- Loading --- */
.loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 48px 0;
  color: var(--color-text-light);
  font-size: 0.9rem;
}

.spinner {
  width: 36px;
  height: 36px;
  border: 3px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* --- Error --- */
.error-message {
  text-align: center;
  color: var(--color-error);
  padding: 24px;
  font-weight: 500;
}

/* --- Product Grid --- */
.product-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  padding-bottom: 16px;
}

.no-products {
  grid-column: 1 / -1;
  text-align: center;
  color: var(--color-text-light);
  padding: 32px 0;
}

/* --- Product Card --- */
.product-card {
  background: var(--color-white);
  border: 2px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
}

.product-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.product-card.selected {
  border-color: var(--color-primary-dark);
  box-shadow: 0 0 0 3px var(--color-primary-light), var(--shadow-md);
}

.product-card.selected::after {
  content: '\2713';
  position: absolute;
  top: 8px;
  right: 8px;
  width: 24px;
  height: 24px;
  background: var(--color-primary-dark);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 700;
}

.product-card {
  position: relative;
}

.product-image-wrap {
  aspect-ratio: 1 / 1;
  overflow: hidden;
  background: var(--color-primary-light);
}

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

.product-card:hover .product-image {
  transform: scale(1.05);
}

.product-info {
  padding: 10px 12px;
}

.product-title {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-text);
  line-height: 1.3;
  margin-bottom: 4px;
}

.product-price {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-primary-dark);
}

/* --- Navigation Buttons --- */
.nav-buttons {
  display: flex;
  justify-content: center;
  gap: 12px;
  padding: 16px 0 24px;
}

.btn {
  padding: 12px 32px;
  border: none;
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

.btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.btn-secondary {
  background: var(--color-white);
  color: var(--color-text);
  border: 2px solid var(--color-border);
}

.btn-secondary:hover:not(:disabled) {
  border-color: var(--color-primary);
  background: var(--color-primary-light);
}

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

.btn-primary:hover:not(:disabled) {
  background: var(--color-primary-dark);
}

.btn-checkout {
  background: var(--color-accent);
  color: var(--color-white);
  padding: 14px 40px;
  font-size: 1.1rem;
}

.btn-checkout:hover:not(:disabled) {
  background: #6d5555;
  box-shadow: var(--shadow-md);
}

/* --- Review Section --- */
.review-section {
  padding-bottom: 16px;
}

.review-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.review-card {
  background: var(--color-white);
  border: 2px solid var(--color-primary-light);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.review-image-wrap {
  aspect-ratio: 1 / 1;
  overflow: hidden;
  background: var(--color-primary-light);
}

.review-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.review-info {
  padding: 10px 12px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.review-step-label {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-light);
  font-weight: 600;
}

.review-title {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-text);
}

.review-price {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-primary-dark);
}

.review-total-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 0;
  margin-top: 12px;
  border-top: 2px solid var(--color-border);
}

.review-total-label {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  color: var(--color-accent);
}

.review-total-amount {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--color-primary-dark);
}

/* --- Sticky Summary Bar --- */
.summary-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--color-white);
  border-top: 2px solid var(--color-primary-light);
  box-shadow: 0 -4px 12px rgba(0,0,0,0.08);
  z-index: 100;
  padding: 12px 0;
}

.summary-bar-inner {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.summary-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.summary-label {
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--color-accent);
}

.summary-total {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-primary-dark);
}

.summary-items {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 16px;
}

.summary-item {
  display: flex;
  gap: 6px;
  font-size: 0.75rem;
  color: var(--color-text-light);
}

.summary-item-label {
  font-weight: 600;
}

.summary-item-value {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 160px;
}

/* ==============================
   Responsive — Tablet & Desktop
   ============================== */

@media (min-width: 600px) {
  .product-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
  }

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

  .step-title {
    font-size: 1.5rem;
  }

  .site-title {
    font-size: 1.8rem;
  }
}

@media (min-width: 900px) {
  .product-grid {
    grid-template-columns: repeat(4, 1fr);
  }

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

  .progress-bar {
    min-width: auto;
  }

  body {
    padding-bottom: 80px;
  }

  .summary-bar-inner {
    flex-direction: row;
    align-items: center;
    gap: 24px;
  }

  .summary-items {
    flex: 1;
    gap: 8px 20px;
  }
}

/* --- Scrollbar for progress on small screens --- */
.progress-bar-wrap::-webkit-scrollbar {
  height: 4px;
}

.progress-bar-wrap::-webkit-scrollbar-thumb {
  background: var(--color-primary-light);
  border-radius: 2px;
}