:root {
  --green-dark: #1f5c3a;
  --green: #2f7d50;
  --green-light: #e7f5ec;
  --cream: #faf9f5;
  --text: #222222;
  --muted: #666666;
  --card: #ffffff;
  --border: #e3e3e3;
  --danger: #9e2a2a;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: var(--cream);
  color: var(--text);
  line-height: 1.5;
}

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

header {
  background: linear-gradient(135deg, var(--green-dark), var(--green));
  color: white;
  text-align: center;
  padding: 28px 18px;
}

header h1 {
  margin: 0 0 8px;
  font-size: 2rem;
}

header p {
  margin: 0;
  opacity: 0.95;
}

nav {
  background: #173f29;
  color: white;
  padding: 12px 18px;
  display: flex;
  justify-content: center;
  gap: 18px;
  flex-wrap: wrap;
  position: sticky;
  top: 0;
  z-index: 10;
}

nav a {
  font-weight: bold;
}

.hero {
  text-align: center;
  padding: 56px 20px 30px;
}

.hero h2 {
  margin-top: 0;
  color: var(--green-dark);
  font-size: 2rem;
}

.hero p {
  max-width: 760px;
  margin: 0 auto;
  color: var(--muted);
}

.container {
  max-width: 1180px;
  margin: 0 auto;
  padding: 24px 18px 50px;
}

.grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 22px;
}

.catalog {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(235px, 1fr));
  gap: 18px;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  box-shadow: 0 6px 18px rgba(0,0,0,0.05);
}

.product-card {
  overflow: hidden;
}

.product-image {
  height: 180px;
  background: linear-gradient(135deg, #dcefe3, #c8e5d3);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--green-dark);
  font-weight: bold;
  font-size: 1.1rem;
}

.product-body {
  padding: 18px;
}

.product-body h3 {
  margin: 0 0 8px;
}

.price {
  color: var(--green-dark);
  font-weight: bold;
  font-size: 1.2rem;
  margin-bottom: 6px;
}

.muted {
  color: var(--muted);
}

.small {
  font-size: 0.92rem;
}

.qty-row {
  display: flex;
  gap: 10px;
  align-items: center;
  margin-top: 14px;
  flex-wrap: wrap;
}

.qty-row input {
  width: 80px;
  padding: 10px;
  border: 1px solid #cfd6dc;
  border-radius: 8px;
}

.btn {
  border: none;
  border-radius: 8px;
  padding: 12px 16px;
  background: var(--green);
  color: white;
  font-weight: bold;
  cursor: pointer;
}

.btn:hover {
  opacity: 0.95;
}

.btn.secondary {
  background: #3c8b5f;
}

.btn.ghost {
  background: transparent;
  color: var(--green-dark);
  border: 1px solid var(--green-dark);
}

.btn.danger {
  background: var(--danger);
}

.sidebar {
  padding: 18px;
  height: fit-content;
  position: sticky;
  top: 72px;
}

.sidebar h3 {
  margin-top: 0;
}

.cart-row {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
}

.cart-controls {
  display: flex;
  gap: 8px;
  align-items: center;
  margin-top: 8px;
  flex-wrap: wrap;
}

.summary-row {
  display: flex;
  justify-content: space-between;
  margin: 10px 0;
  gap: 10px;
}

.notice {
  background: var(--green-light);
  border: 1px solid #cfe6d8;
  color: var(--green-dark);
  padding: 12px 14px;
  border-radius: 12px;
  margin-top: 16px;
}

.actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 18px;
}

.status-message {
  margin-top: 12px;
  color: var(--danger);
  min-height: 22px;
}

footer {
  text-align: center;
  background: #173f29;
  color: white;
  padding: 22px 18px;
}

.page-card {
  max-width: 760px;
  margin: 42px auto;
  padding: 28px;
  text-align: center;
}

.page-card h2 {
  margin-top: 0;
  color: var(--green-dark);
}

ul.help-list {
  text-align: left;
  max-width: 520px;
  margin: 0 auto;
}

@media (max-width: 900px) {
  .grid {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: static;
  }

  .hero h2 {
    font-size: 1.7rem;
  }
}