:root {
  --green: #4a7c59;
  --green-light: #e8f0e6;
  --bg: #faf7f2;
  --text: #2b2b28;
  --muted: #8a8579;
  --danger: #c0554a;
}
* { box-sizing: border-box; }
body {
  margin: 0; font-family: -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg); color: var(--text); padding-bottom: 70px;
}
header {
  background: var(--green); color: #fff; padding: 16px; text-align: center;
  font-size: 18px; font-weight: 600; position: sticky; top: 0; z-index: 10;
}
#login { max-width: 320px; margin: 80px auto; padding: 20px; text-align: center; }
#login input { width: 100%; padding: 10px; margin: 10px 0; border-radius: 8px; border: 1px solid #ccc; }
#login button, .btn {
  background: var(--green); color: #fff; border: none; padding: 10px 16px;
  border-radius: 8px; font-size: 15px; cursor: pointer;
}
main { max-width: 480px; margin: 0 auto; padding: 12px; }
.tab-content { display: none; }
.tab-content.active { display: block; }
.day-block { background: #fff; border-radius: 12px; padding: 12px; margin-bottom: 10px; box-shadow: 0 1px 3px rgba(0,0,0,.08); }
.day-block h3 { margin: 0 0 8px; color: var(--green); }
.meal-row { display: flex; justify-content: space-between; padding: 6px 0; border-bottom: 1px solid #eee; font-size: 14px; }
.meal-row:last-child { border-bottom: none; }
.meal-type { color: var(--muted); font-size: 12px; text-transform: uppercase; }
ul.shopping { list-style: none; padding: 0; margin: 0; }
ul.shopping li {
  display: flex; align-items: center; gap: 10px; background: #fff;
  padding: 10px 12px; border-radius: 10px; margin-bottom: 6px;
}
ul.shopping li.purchased { opacity: .45; text-decoration: line-through; }
.category-label { font-size: 12px; color: var(--muted); margin: 12px 0 4px; text-transform: uppercase; }
.price-card { background: #fff; border-radius: 12px; padding: 12px; margin-bottom: 8px; display: flex; justify-content: space-between; }
.price-card.best { border: 2px solid var(--green); }
nav.tabs {
  position: fixed; bottom: 0; left: 0; right: 0; background: #fff;
  display: flex; border-top: 1px solid #ddd; z-index: 10;
}
nav.tabs button {
  flex: 1; background: none; border: none; padding: 10px 0; font-size: 12px; color: var(--muted);
}
nav.tabs button.active { color: var(--green); font-weight: 600; }
#chat-log { background: #fff; border-radius: 12px; padding: 10px; height: 300px; overflow-y: auto; margin-bottom: 10px; }
.msg { padding: 6px 10px; border-radius: 10px; margin-bottom: 6px; max-width: 85%; font-size: 14px; }
.msg.user { background: var(--green-light); margin-left: auto; }
.msg.assistant { background: #f0ede6; }
#chat-input-row { display: flex; gap: 6px; }
#chat-input-row input { flex: 1; padding: 10px; border-radius: 8px; border: 1px solid #ccc; }
.member-card { background: #fff; border-radius: 12px; padding: 12px; margin-bottom: 8px; }
.member-card label { display: block; font-size: 12px; color: var(--muted); margin-top: 6px; }
.member-card input { width: 100%; padding: 6px; border-radius: 6px; border: 1px solid #ccc; }