/* --------------------------------------------------------------------------
   ErgoDesk Singapore - Modern Workspace Design System
   Minimalist, High-Precision Ergonomics, Zero Clutter
   -------------------------------------------------------------------------- */

:root {
  --ergo-bg: #ffffff;
  --ergo-surface: #f8fafc;
  --ergo-card: #ffffff;
  --ergo-border: #e2e8f0;
  --ergo-border-light: #f1f5f9;
  --ergo-border-hover: #cbd5e1;
  --ergo-text-primary: #0f172a;
  --ergo-text-secondary: #475569;
  --ergo-text-tertiary: #94a3b8;
  --ergo-blue: #0284c7;
  --ergo-blue-hover: #0369a1;
  --ergo-blue-light: #0ea5e9;
  --ergo-accent: #0f172a;
  --ergo-green: #16a34a;
  --ergo-orange: #ea580c;
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --ease-ergo: cubic-bezier(0.16, 1, 0.3, 1);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  background-color: var(--ergo-bg);
  color: var(--ergo-text-primary);
  font-family: var(--font-family);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

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

header.ergo-header {
  height: 56px;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--ergo-border);
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
}

.ergo-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
}

.brand-mark {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--ergo-text-primary);
}

.brand-logo-icon {
  width: 24px;
  height: 24px;
  background: var(--ergo-blue);
  color: #fff;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  font-weight: 800;
}

.sg-badge {
  font-size: 0.72rem;
  font-weight: 600;
  background: var(--ergo-surface);
  color: var(--ergo-text-secondary);
  padding: 3px 10px;
  border-radius: 980px;
  border: 1px solid var(--ergo-border);
}

.nav-menu {
  display: flex;
  gap: 24px;
  align-items: center;
}

.nav-link {
  color: var(--ergo-text-secondary);
  font-size: 0.88rem;
  font-weight: 500;
  transition: color 0.2s ease;
}

.nav-link:hover {
  color: var(--ergo-blue);
}

.hero-section {
  padding: 65px 0 40px;
  text-align: center;
  background: #ffffff;
}

.eyebrow-tag {
  display: inline-block;
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--ergo-blue);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 14px;
}

.hero-title {
  font-size: 3.2rem;
  font-weight: 800;
  letter-spacing: -0.035em;
  line-height: 1.15;
  margin-bottom: 16px;
  color: var(--ergo-text-primary);
}

.hero-subtitle {
  max-width: 720px;
  margin: 0 auto 30px;
  font-size: 1.2rem;
  font-weight: 400;
  color: var(--ergo-text-secondary);
  line-height: 1.6;
}

.hero-cta-group {
  display: flex;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
}

.btn-ergo-primary {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--ergo-blue);
  color: #ffffff;
  font-size: 0.95rem;
  font-weight: 600;
  padding: 12px 26px;
  border-radius: 980px;
  transition: all 0.2s var(--ease-ergo);
}

.btn-ergo-primary:hover {
  background: var(--ergo-blue-hover);
  transform: translateY(-1px);
}

.btn-ergo-secondary {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--ergo-surface);
  color: var(--ergo-text-primary);
  font-size: 0.95rem;
  font-weight: 600;
  padding: 12px 26px;
  border-radius: 980px;
  border: 1px solid var(--ergo-border);
  transition: all 0.2s var(--ease-ergo);
}

.btn-ergo-secondary:hover {
  background: #edf2f7;
}

.filter-container {
  display: flex;
  justify-content: center;
  margin: 35px 0 40px;
}

.segmented-dock {
  display: inline-flex;
  background: var(--ergo-surface);
  border: 1px solid var(--ergo-border);
  padding: 4px;
  border-radius: 980px;
  gap: 4px;
  flex-wrap: wrap;
}

.segment-btn {
  background: transparent;
  border: none;
  color: var(--ergo-text-secondary);
  padding: 8px 20px;
  border-radius: 980px;
  font-size: 0.86rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
}

.segment-btn:hover { color: var(--ergo-text-primary); }

.segment-btn.active {
  background: #ffffff;
  color: var(--ergo-blue);
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.08);
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: 28px;
  margin-bottom: 70px;
}

.ergo-card {
  background: var(--ergo-card);
  border: 1px solid var(--ergo-border);
  border-radius: 18px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform 0.25s var(--ease-ergo), box-shadow 0.25s ease, border-color 0.25s ease;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.02);
}

.ergo-card:hover {
  transform: translateY(-4px);
  border-color: var(--ergo-border-hover);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.07);
}

.card-media-wrapper {
  position: relative;
  height: 270px;
  background: #ffffff;
  overflow: hidden;
  border-bottom: 1px solid var(--ergo-border-light);
  display: flex;
  align-items: center;
  justify-content: center;
}

.card-media-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  padding: 42px 18px 16px 18px;
  box-sizing: border-box;
  text-decoration: none;
}

.card-img {
  max-width: 100%;
  max-height: 100%;
  width: auto;
  height: auto;
  object-fit: contain;
  margin: auto;
  display: block;
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.ergo-card:hover .card-img {
  transform: scale(1.05);
}

.card-brand-badge {
  position: absolute;
  top: 14px;
  left: 14px;
  background: #ffffff;
  border: 1px solid var(--ergo-border);
  color: var(--ergo-text-primary);
  font-size: 0.72rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 980px;
}

.card-tier-pill {
  position: absolute;
  top: 14px;
  right: 14px;
  font-size: 0.72rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 980px;
  background: #ffffff;
  border: 1px solid var(--ergo-border);
}

.tier-anchor { color: var(--ergo-blue); border-color: rgba(2, 132, 199, 0.3); }
.tier-trigger { color: var(--ergo-green); border-color: rgba(22, 163, 74, 0.3); }

.card-body {
  padding: 22px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.card-cat {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--ergo-blue);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 6px;
}

.card-title {
  font-size: 1.15rem;
  font-weight: 700;
  line-height: 1.35;
  margin-bottom: 10px;
  color: var(--ergo-text-primary);
}

.card-desc {
  font-size: 0.88rem;
  color: var(--ergo-text-secondary);
  line-height: 1.5;
  margin-bottom: 16px;
  flex-grow: 1;
}

.card-features {
  list-style: none;
  margin-bottom: 18px;
}

.card-features li {
  font-size: 0.82rem;
  color: var(--ergo-text-secondary);
  margin-bottom: 5px;
  display: flex;
  align-items: flex-start;
  gap: 6px;
}

.card-features li::before {
  content: "✔";
  color: var(--ergo-green);
  font-size: 0.8rem;
  font-weight: 700;
}

.card-meta-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 14px;
  border-top: 1px solid var(--ergo-border-light);
  margin-bottom: 16px;
}

.price-box {
  display: flex;
  flex-direction: column;
}

.price-current {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--ergo-text-primary);
}

.price-original {
  font-size: 0.82rem;
  color: var(--ergo-text-tertiary);
  text-decoration: line-through;
}

.rating-box {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--ergo-text-primary);
  display: flex;
  align-items: center;
  gap: 4px;
}

.btn-card-buy {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  background: var(--ergo-accent);
  color: #ffffff;
  padding: 11px 18px;
  border-radius: 980px;
  font-size: 0.88rem;
  font-weight: 600;
  transition: all 0.2s ease;
}

.btn-card-buy:hover {
  background: var(--ergo-blue);
}

/* Guides Section */
.guides-section {
  padding: 60px 0;
  border-top: 1px solid var(--ergo-border);
  background: var(--ergo-surface);
}

.guides-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
  margin-top: 30px;
}

.guide-card {
  background: #ffffff;
  border: 1px solid var(--ergo-border);
  border-radius: 16px;
  padding: 24px;
  transition: transform 0.2s ease;
}

.guide-card:hover {
  transform: translateY(-3px);
  border-color: var(--ergo-border-hover);
}

.guide-tag {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--ergo-blue);
  text-transform: uppercase;
  margin-bottom: 8px;
}

.guide-title {
  font-size: 1.15rem;
  font-weight: 700;
  line-height: 1.35;
  margin-bottom: 10px;
  color: var(--ergo-text-primary);
}

.guide-summary {
  font-size: 0.88rem;
  color: var(--ergo-text-secondary);
  line-height: 1.5;
  margin-bottom: 16px;
}

/* Footer */
footer.ergo-footer {
  background: #ffffff;
  border-top: 1px solid var(--ergo-border);
  padding: 40px 0 30px;
  font-size: 0.85rem;
  color: var(--ergo-text-secondary);
}

.legal-notice {
  background: var(--ergo-surface);
  border: 1px solid var(--ergo-border);
  padding: 16px;
  border-radius: 12px;
  margin-bottom: 24px;
  font-size: 0.82rem;
  line-height: 1.5;
}

/* Product Detail Page Layout */
.product-detail-layout {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 40px;
  padding: 40px 0 60px;
}

.detail-gallery {
  background: #ffffff;
  border: 1px solid var(--ergo-border);
  border-radius: 20px;
  padding: 30px 20px;
  text-align: center;
  margin-bottom: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 340px;
  box-sizing: border-box;
}

.detail-img {
  max-width: 100%;
  max-height: 420px;
  width: auto;
  height: auto;
  object-fit: contain;
  margin: 0 auto;
  display: block;
}

.sticky-buy-box {
  background: #ffffff;
  border: 1px solid var(--ergo-border);
  border-radius: 18px;
  padding: 24px;
  position: sticky;
  top: 80px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.04);
}

.buy-eyebrow {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--ergo-blue);
  text-transform: uppercase;
  margin-bottom: 6px;
}

.buy-price-large {
  font-size: 2rem;
  font-weight: 800;
  color: var(--ergo-text-primary);
  margin-bottom: 8px;
}

.spec-table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
  font-size: 0.9rem;
}

.spec-table td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--ergo-border-light);
}

.spec-table td:first-child {
  font-weight: 600;
  color: var(--ergo-text-primary);
  width: 38%;
}

.spec-table td:last-child {
  color: var(--ergo-text-secondary);
}

/* Mobile Sticky Bar */
.mobile-sticky-cta {
  display: none;
}

@media (max-width: 860px) {
  .product-detail-layout { grid-template-columns: 1fr; }
  .hero-title { font-size: 2.2rem; }
  .product-grid { grid-template-columns: 1fr; }
  .card-media-wrapper {
    height: 240px;
  }
  .card-media-link {
    padding: 38px 14px 12px 14px;
  }
  .card-img {
    max-height: 185px;
  }
  .detail-gallery {
    padding: 20px 14px;
    min-height: 260px;
  }
  .detail-img {
    max-height: 280px;
  }
  .mobile-sticky-cta {
    display: flex;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.96);
    backdrop-filter: blur(15px);
    border-top: 1px solid var(--ergo-border);
    padding: 12px 18px;
    align-items: center;
    justify-content: space-between;
    z-index: 999;
  }
}

@media (max-width: 480px) {
  .card-media-wrapper {
    height: 220px;
  }
  .card-media-link {
    padding: 36px 10px 10px 10px;
  }
  .card-img {
    max-height: 170px;
  }
  .detail-gallery {
    min-height: 230px;
    padding: 16px 10px;
  }
  .detail-img {
    max-height: 230px;
  }
}