:root {
  --green: #0b7a3e;
  --green-dark: #075c2e;
  --green-soft: #e8f5ed;
  --wa: #1fa855;
  --text: #1c2321;
  --muted: #5d6763;
  --line: #e3e7e5;
  --bg: #f5f7f6;
  --card: #ffffff;
  --red: #c62828;
  --radius: 12px;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "Hind Siliguri", system-ui, -apple-system, "Segoe UI", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.55;
  font-size: 16px;
}
a { color: var(--green); }
img { max-width: 100%; display: block; }
.wrap { max-width: 1100px; margin: 0 auto; padding: 0 16px; }
.muted { color: var(--muted); font-size: 14px; }
.center { text-align: center; }

.topbar { background: var(--green); color: #fff; text-align: center; font-size: 14px; padding: 6px 12px; }
.header {
  max-width: 1100px; margin: 0 auto; padding: 12px 16px;
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
}
.logo { font-weight: 700; font-size: 22px; color: var(--text); text-decoration: none; letter-spacing: -0.2px; }
.contact { display: flex; gap: 8px; }
.btn-call, .btn-wa {
  display: inline-flex; align-items: center; gap: 6px; text-decoration: none;
  padding: 8px 12px; border-radius: 999px; font-weight: 600; font-size: 14px;
}
.btn-call { background: #fff; color: var(--green); border: 1.5px solid var(--green); }
.btn-wa { background: var(--wa); color: #fff; }
.btn-wa.big { padding: 12px 20px; font-size: 16px; }
@media (max-width: 480px) { .contact span { display: none; } .btn-call, .btn-wa { padding: 9px; } }

.hero { text-align: center; padding: 20px 0 8px; }
.hero h1 { font-size: 28px; margin: 0 0 6px; line-height: 1.3; }
.hero p { margin: 0; color: var(--muted); }

.trust { list-style: none; padding: 0; margin: 16px 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.trust li { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 10px; text-align: center; }
.trust b { display: block; font-size: 15px; color: var(--green-dark); }
.trust span { font-size: 13px; color: var(--muted); }
@media (max-width: 560px) { .trust b { font-size: 13px; } .trust span { font-size: 12px; } .trust li { padding: 8px 4px; } }

.section-title { font-size: 20px; margin: 24px 0 12px; }
.grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
@media (min-width: 720px) { .grid { grid-template-columns: repeat(4, 1fr); gap: 16px; } }
.card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden;
  text-decoration: none; color: inherit; display: flex; flex-direction: column;
  transition: box-shadow .15s, transform .15s;
}
.card:hover { box-shadow: 0 6px 18px rgba(0,0,0,.08); transform: translateY(-1px); }
.card-img { position: relative; aspect-ratio: 1 / 1; background: #f0f2f1; }
.card-img img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: contain; }
.card.out .card-img img { opacity: .55; filter: grayscale(.5); }
.badge-out, .badge-in {
  position: absolute; z-index: 1; top: 8px; left: 8px; font-size: 12px; font-weight: 600;
  padding: 2px 8px; border-radius: 999px;
}
.badge-out { background: #fff; color: var(--red); border: 1px solid #f3c4c4; }
.badge-in { background: var(--green); color: #fff; }
.card-body { padding: 10px 12px 12px; display: flex; flex-direction: column; gap: 4px; flex: 1; }
.card-body h3 { font-size: 15px; margin: 0; font-weight: 600; line-height: 1.35; }
.price { font-weight: 700; color: var(--green-dark); font-size: 18px; }
.card-btn {
  margin-top: auto; text-align: center; background: var(--green); color: #fff;
  border-radius: 8px; padding: 7px; font-weight: 600; font-size: 14px;
}
.card.out .card-btn { background: #e9ecea; color: var(--muted); }

.steps ol { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px 14px 14px 36px; margin: 0; }
.steps li { margin: 4px 0; }

.back { display: inline-block; margin: 8px 0 12px; text-decoration: none; font-weight: 500; }
.product { display: grid; gap: 20px; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px; }
@media (min-width: 820px) { .product { grid-template-columns: 1fr 1fr; padding: 24px; } }
.product-img { position: relative; background: #f0f2f1; border-radius: 10px; overflow: hidden; aspect-ratio: 1 / 1; }
.product-img img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: contain; }
.product-info h1 { font-size: 24px; margin: 0; line-height: 1.35; }
.product-info .en { color: var(--muted); margin-top: 2px; }
.price.big { font-size: 28px; margin: 10px 0 4px; }
.price.big small { font-size: 14px; color: var(--muted); font-weight: 500; }
.stock-in, .stock-out { display: inline-block; font-weight: 600; font-size: 14px; padding: 2px 10px; border-radius: 999px; }
.stock-in { background: var(--green-soft); color: var(--green-dark); }
.stock-out { background: #fdecec; color: var(--red); }
.features { padding-left: 20px; margin: 14px 0; }
.features li { margin: 3px 0; }
.desc { color: #38423e; }
.product-info .trust { grid-template-columns: 1fr 1fr 1fr; }

.order, .box {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 18px 16px; margin: 16px 0;
}
.order { border: 2px solid var(--green); max-width: 620px; margin-left: auto; margin-right: auto; }
.order h2 { margin: 0 0 12px; font-size: 20px; text-align: center; }
.field { display: block; margin-bottom: 12px; font-weight: 600; font-size: 15px; }
.field input:not([type=radio]), .field textarea {
  display: block; width: 100%; margin-top: 4px; padding: 11px 12px; font: inherit; font-weight: 400;
  border: 1.5px solid #cfd6d3; border-radius: 8px; background: #fff;
}
.field input:focus, .field textarea:focus { outline: none; border-color: var(--green); box-shadow: 0 0 0 3px rgba(11,122,62,.12); }
fieldset.area { border: 0; padding: 0; margin: 0 0 12px; }
fieldset.area legend { padding: 0; margin-bottom: 4px; }
fieldset.area label {
  display: flex; align-items: center; gap: 8px; font-weight: 500; padding: 10px 12px; margin-top: 6px;
  border: 1.5px solid #cfd6d3; border-radius: 8px; cursor: pointer;
}
fieldset.area label:has(input:checked) { border-color: var(--green); background: var(--green-soft); }
fieldset.area b { margin-left: auto; }
.qty { display: inline-flex; margin-top: 4px; border: 1.5px solid #cfd6d3; border-radius: 8px; overflow: hidden; }
.qty button { width: 42px; border: 0; background: #f0f2f1; font-size: 20px; cursor: pointer; }
.qty input { width: 56px !important; text-align: center; border: 0 !important; margin: 0 !important; border-radius: 0 !important; }
.summary { background: var(--bg); border-radius: 8px; padding: 10px 12px; margin: 6px 0 14px; }
.summary div { display: flex; justify-content: space-between; padding: 3px 0; }
.summary .total { border-top: 1px dashed #c9d1cd; margin-top: 4px; padding-top: 7px; font-weight: 700; font-size: 18px; }
.btn-order {
  width: 100%; padding: 14px; font: inherit; font-size: 18px; font-weight: 700; color: #fff;
  background: var(--green); border: 0; border-radius: 10px; cursor: pointer;
}
.btn-order:hover { background: var(--green-dark); }
.btn-order:disabled { opacity: .7; }
.hp { position: absolute; left: -9999px; }
.out-box { text-align: center; max-width: 620px; margin: 16px auto; }
.out-box h2 { margin-top: 0; }

.thanks { text-align: center; max-width: 560px; margin: 32px auto; }
.thanks .tick { width: 56px; height: 56px; border-radius: 50%; background: var(--green); color: #fff; font-size: 32px; line-height: 56px; margin: 0 auto 8px; }
.thanks h1 { font-size: 24px; margin: 4px 0; }
.order-no { font-size: 18px; }

.footer { background: #fff; border-top: 1px solid var(--line); margin-top: 32px; padding: 18px 0 80px; font-size: 15px; }
.footer p { margin: 4px 0; }
.wa-float {
  position: fixed; right: 16px; bottom: 16px; width: 54px; height: 54px; border-radius: 50%;
  background: var(--wa); color: #fff; display: grid; place-items: center; box-shadow: 0 6px 16px rgba(0,0,0,.2);
}
.wa-float svg { width: 28px; height: 28px; }