:root {
  --primary: #42f59e;
  --secondary: #1a1a1a;
  --accent: #ffffff;
  --success: #10b981;
  --error: #ef4444;
  --font-heading: 'Inter', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--secondary);
  background: var(--accent);
  line-height: 1.5;
}

h1, h2, h3, h4 { font-family: var(--font-heading); font-weight: 700; }

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

.container { max-width: 1200px; margin: 0 auto; padding: 0 1.5rem; }

/* Navbar */
.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.5rem;
  border-bottom: 1px solid #eee;
  position: sticky;
  top: 0;
  background: var(--accent);
  z-index: 50;
}
.navbar .logo { height: 32px; }
.nav-links { display: flex; gap: 1.5rem; align-items: center; }
.nav-links a { font-weight: 600; }
.nav-links a:hover { color: var(--primary); }
.cart-link { position: relative; }
.cart-badge {
  position: absolute; top: -8px; right: -12px;
  background: var(--secondary); color: var(--primary);
  border-radius: 999px; font-size: 0.7rem; padding: 1px 6px;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  border-radius: 8px;
  font-weight: 700;
  border: none;
  cursor: pointer;
  transition: transform 0.15s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: var(--primary); color: var(--secondary); }
.btn-dark { background: var(--secondary); color: var(--primary); }
.btn-outline { background: transparent; border: 2px solid var(--secondary); color: var(--secondary); }

/* Hero */
.hero {
  background: linear-gradient(135deg, #f8fff9 0%, #e6fff2 100%);
  padding: 5rem 1.5rem;
  text-align: center;
}
.hero h1 { font-size: 3rem; margin-bottom: 1rem; }
.hero p { font-size: 1.2rem; color: #555; max-width: 600px; margin: 0 auto 2rem; }

/* Sections */
.section { padding: 4rem 1.5rem; }
.section h2 { font-size: 2rem; margin-bottom: 2rem; text-align: center; }

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 1.5rem;
}

.card {
  border: 1px solid #eee;
  border-radius: 12px;
  overflow: hidden;
  background: var(--accent);
  transition: box-shadow 0.2s ease;
}
.card:hover { box-shadow: 0 8px 24px rgba(0,0,0,0.08); }
.card img { width: 100%; height: 200px; object-fit: cover; background: #f4f4f4; }
.card-body { padding: 1rem; }
.card-price { font-weight: 700; color: var(--secondary); margin-top: 0.5rem; }

.cta-banner {
  background: var(--secondary);
  color: var(--accent);
  border-radius: 16px;
  padding: 3rem;
  text-align: center;
}
.cta-banner h2 { color: var(--accent); }

footer {
  background: var(--secondary);
  color: #ccc;
  padding: 3rem 1.5rem 1.5rem;
  margin-top: 3rem;
}
footer a:hover { color: var(--primary); }
.footer-links { display: flex; gap: 1.5rem; flex-wrap: wrap; margin-bottom: 1.5rem; }
.footer-bottom { border-top: 1px solid #333; padding-top: 1rem; font-size: 0.85rem; }

/* Forms */
.form-group { margin-bottom: 1rem; }
.form-group label { display: block; font-weight: 600; margin-bottom: 0.25rem; }
.form-group input, .form-group select, .form-group textarea {
  width: 100%; padding: 0.6rem 0.75rem; border: 1px solid #ddd; border-radius: 8px; font-family: inherit;
}

/* Builder */
.builder-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; }
@media (max-width: 900px) { .builder-layout { grid-template-columns: 1fr; } }

.receipt-preview-wrap {
  perspective: 1000px;
  display: flex; justify-content: center; align-items: flex-start;
  padding: 2rem; background: #f4f4f4; border-radius: 12px; min-height: 500px;
}
.receipt-paper {
  background: #fdfdf8;
  width: 260px;
  padding: 1.5rem 1.2rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  box-shadow: 0 20px 40px rgba(0,0,0,0.25), 0 2px 6px rgba(0,0,0,0.15);
  transform: rotateX(6deg) rotateY(-4deg);
  transition: transform 0.3s ease, height 0.3s ease;
  border-radius: 2px;
  position: relative;
}
.receipt-paper::after {
  content: "";
  position: absolute; left: 0; right: 0; bottom: -6px; height: 12px;
  background: repeating-linear-gradient(-45deg, #fdfdf8 0 6px, transparent 6px 12px);
}
.receipt-paper .store-name { text-align: center; font-weight: 700; margin-bottom: 0.5rem; text-transform: uppercase; }
.receipt-paper .divider { border-top: 1px dashed #999; margin: 0.5rem 0; }
.receipt-paper .line-item { display: flex; justify-content: space-between; }
.receipt-paper .total-line { display: flex; justify-content: space-between; font-weight: 700; margin-top: 0.5rem; }
.receipt-paper .message { text-align: center; margin-top: 1rem; font-style: italic; }
.receipt-paper .date { text-align: center; color: #777; margin-top: 0.5rem; font-size: 0.75rem; }

/* Cart */
.cart-table { width: 100%; border-collapse: collapse; }
.cart-table th, .cart-table td { text-align: left; padding: 0.75rem; border-bottom: 1px solid #eee; }
.cart-summary { max-width: 320px; margin-left: auto; padding: 1.5rem; border: 1px solid #eee; border-radius: 12px; }

@media (max-width: 700px) {
  .hero h1 { font-size: 2rem; }
  .nav-links { gap: 0.75rem; }
}