/* Infusion Labs – Dark theme + Nexa-style geometric font */
:root {
  --bg: #0f0f0f;
  --bg-elevated: #1a1a1a;
  --text: #f5f5f5;
  --text-muted: #a0a0a0;
  --border: #2a2a2a;
  --accent: #ffffff;
  --card-bg: #161616;
  --font: "Nexa", "Nexa ExtraBold", "Nexa Bold", "Outfit", "Montserrat", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

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

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  font-weight: 400;
  letter-spacing: 0.01em;
}

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

/* Header */
.header {
  border-bottom: 1px solid var(--border);
  padding: 16px 0;
  position: sticky;
  top: 0;
  background: var(--bg);
  z-index: 100;
}

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

.logo img {
  height: 36px;
  width: auto;
}

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

.nav a {
  text-decoration: none;
  color: var(--text);
  font-weight: 500;
  font-size: 14px;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

.nav a.active { font-weight: 600; }

.nav button {
  background: none;
  border: none;
  font-family: inherit;
  font-size: 14px;
  cursor: pointer;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.cart-count {
  background: var(--text);
  color: var(--bg);
  border-radius: 50%;
  padding: 2px 6px;
  font-size: 11px;
  margin-left: 4px;
}

/* Hero */
.hero {
  padding: 80px 0 40px;
  text-align: center;
}

h1, h2, .guide-card h2, .product-details h1 {
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.hero h1 {
  font-size: 48px;
  letter-spacing: 0.12em;
}

.tagline {
  font-size: 18px;
  color: var(--text-muted);
  max-width: 600px;
  margin: 0 auto;
}

/* Products */
.products { padding: 40px 0 80px; }

.products h2 {
  font-size: 14px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: 32px;
  font-weight: 600;
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 32px;
}

.product-card {
  border: 1px solid var(--border);
  padding: 16px;
  background: var(--card-bg);
  transition: box-shadow 0.2s;
}

.product-card:hover { box-shadow: 0 4px 20px rgba(0,0,0,0.06); }

.product-card img {
  width: 100%;
  height: 240px;
  object-fit: cover;
  margin-bottom: 16px;
}

.product-card h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
}

.price { font-weight: 500; }

/* Buttons */
.btn, .btn-secondary {
  display: inline-block;
  padding: 12px 24px;
  text-decoration: none;
  font-weight: 600;
  font-size: 14px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border: 1px solid var(--text);
  cursor: pointer;
  transition: all 0.2s;
  background: var(--text);
  color: var(--bg);
  text-align: center;
  font-family: inherit;
}

.btn-secondary {
  background: transparent;
  color: var(--text);
}

.btn:hover, .btn-secondary:hover {
  background: var(--text);
  color: var(--bg);
}

.btn-secondary {
  background: transparent;
  color: var(--text);
}

.btn:hover, .btn-secondary:hover {
  background: var(--text);
  color: var(--bg);
}

/* Guides Page */
.guides-page { padding: 48px 0 80px; }

.guides-page h1 {
  font-size: 36px;
  letter-spacing: 0.1em;
  margin-bottom: 12px;
}

.intro { color: var(--text-muted); margin-bottom: 8px; }

.count, .shown-count {
  font-size: 14px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin: 24px 0;
  font-weight: 500;
}

.filters {
  display: flex;
  gap: 24px;
  align-items: end;
  margin-bottom: 32px;
  flex-wrap: wrap;
}

.filter-group label {
  display: block;
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 8px;
  font-weight: 600;
}

.filter-group select {
  padding: 10px 16px;
  border: 1px solid var(--border);
  font-family: inherit;
  font-size: 14px;
  min-width: 180px;
  background: var(--bg-elevated);
  color: var(--text);
}

.guides-grid {
  display: grid;
  gap: 32px;
}

.guide-card {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 32px;
  border: 1px solid var(--border);
  padding: 24px;
  align-items: center;
  background: var(--card-bg);
}

.guide-image {
  position: relative;
}

.guide-image img {
  width: 100%;
  height: 180px;
  object-fit: cover;
}

.play-btn {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: rgba(0,0,0,0.7);
  color: white;
  border: none;
  font-size: 18px;
  cursor: pointer;
}

.category {
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  display: block;
  margin-bottom: 8px;
}

.guide-card h2 {
  font-size: 22px;
  letter-spacing: 0.05em;
  margin-bottom: 8px;
}

.video-embed {
  margin: 16px 0;
}

.youtube-wrapper {
  position: relative;
  padding-bottom: 56.25%; /* 16:9 */
  height: 0;
  overflow: hidden;
  max-width: 560px;
  border: 1px solid var(--border);
  background: #000;
}

.youtube-wrapper iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

.video-fallback {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 8px;
}

.video-fallback a {
  color: var(--text);
}

.thumbnails {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.thumbnails img {
  width: 64px;
  height: 64px;
  object-fit: cover;
  cursor: pointer;
  border: 1px solid var(--border);
  opacity: 0.7;
  transition: opacity 0.2s, border-color 0.2s;
}

.thumbnails img:hover,
.thumbnails img.active {
  opacity: 1;
  border-color: var(--text);
}

/* Modal */
.modal {
  display: none;
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background: rgba(0,0,0,0.85);
  z-index: 1000;
  align-items: center;
  justify-content: center;
}

.modal.active { display: flex; }

.modal-content {
  background: var(--bg);
  padding: 24px;
  max-width: 900px;
  width: 90%;
  position: relative;
}

.close-modal {
  position: absolute;
  top: 12px; right: 16px;
  background: none;
  border: none;
  font-size: 28px;
  cursor: pointer;
}

#guide-video {
  width: 100%;
  max-height: 60vh;
}

/* Product Page */
.product-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  padding: 48px 0;
}

.product-gallery img#main-image {
  width: 100%;
  height: auto;
  margin-bottom: 16px;
}

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

.thumbnails img {
  width: 80px;
  height: 80px;
  object-fit: cover;
  cursor: pointer;
  border: 1px solid var(--border);
}

.thumbnails img:hover, .thumbnails img.active { border-color: var(--text); }

.product-details h1 {
  font-size: 28px;
  letter-spacing: 0.05em;
  margin-bottom: 12px;
}

.variant-selector { margin: 24px 0; }

.variants {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 8px;
}

.variant-btn {
  padding: 10px 16px;
  border: 1px solid var(--border);
  background: transparent;
  font-family: inherit;
  cursor: pointer;
}

.variant-btn.active {
  background: var(--text);
  color: var(--bg);
  border-color: var(--text);
}

.quantity {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 24px 0;
}

.qty-btn {
  width: 36px;
  height: 36px;
  border: 1px solid var(--border);
  background: transparent;
  font-size: 18px;
  cursor: pointer;
}

#quantity {
  width: 60px;
  text-align: center;
  padding: 8px;
  border: 1px solid var(--border);
  font-family: inherit;
}

.buy-btn { width: 100%; margin-top: 16px; }

.note { font-size: 13px; color: var(--text-muted); margin-top: 8px; }

.description { margin-top: 32px; }
.description p { margin-bottom: 16px; }
.disclaimer { font-size: 14px; color: var(--text-muted); }

.guide-link {
  display: inline-block;
  margin-top: 24px;
  color: var(--text);
  font-weight: 500;
}

/* Contact */
.contact-page { padding: 64px 0; max-width: 600px; }

.contact-form .form-group { margin-bottom: 20px; }

.contact-form label {
  display: block;
  margin-bottom: 6px;
  font-size: 14px;
  font-weight: 500;
}

.contact-form input, .contact-form textarea,
.newsletter-form input,
#quantity {
  background: var(--bg-elevated);
  color: var(--text);
  border: 1px solid var(--border);
  font-family: inherit;
}

/* Newsletter */
.newsletter {
  background: var(--bg-elevated);
  padding: 48px 0;
  text-align: center;
  border-top: 1px solid var(--border);
}

.newsletter h3 {
  letter-spacing: 0.15em;
  font-size: 14px;
  margin-bottom: 16px;
}

.newsletter-form {
  display: flex;
  gap: 8px;
  justify-content: center;
  max-width: 400px;
  margin: 0 auto;
}

.newsletter-form input {
  flex: 1;
  padding: 12px;
  border: 1px solid var(--border);
  font-family: inherit;
}

.newsletter-form button {
  padding: 12px 24px;
  background: var(--text);
  color: var(--bg);
  border: none;
  cursor: pointer;
  font-family: inherit;
  letter-spacing: 0.5px;
}

/* Footer */
.footer {
  padding: 24px 0;
  border-top: 1px solid var(--border);
  font-size: 14px;
  color: var(--text-muted);
}

.footer .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer a { color: var(--text-muted); text-decoration: none; }

/* Responsive */
@media (max-width: 768px) {
  .guide-card { grid-template-columns: 1fr; }
  .product-layout { grid-template-columns: 1fr; gap: 32px; }
  .hero h1 { font-size: 32px; }
  .nav { gap: 16px; }
  .filters { flex-direction: column; align-items: stretch; }
}