:root {
    --bg: #f3f6f5;
    --ink: #182321;
    --muted: #66736f;
    --line: #d8e1dd;
    --panel: #ffffff;
    --accent: #16796b;
    --accent-dark: #0e594f;
    --soft: #e9f3f0;
    --danger: #a8322b;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    min-width: 320px;
    color: var(--ink);
    background: var(--bg);
    font-family: "Segoe UI", "Microsoft YaHei", sans-serif;
}

button, input { font: inherit; }

input {
    width: 100%;
    border: 1px solid var(--line);
    border-radius: 6px;
    padding: 11px 12px;
    color: var(--ink);
    background: #fff;
}

input:focus {
    outline: 2px solid rgba(22, 121, 107, .18);
    border-color: var(--accent);
}

button {
    width: 100%;
    border: 0;
    border-radius: 6px;
    padding: 11px 16px;
    color: #fff;
    background: var(--accent);
    cursor: pointer;
}

button:hover { background: var(--accent-dark); }

.shop-shell {
    width: min(1040px, calc(100% - 36px));
    margin: 0 auto;
    padding: 56px 0 30px;
}

.shop-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 28px;
    margin-bottom: 36px;
}

.eyebrow {
    margin: 0 0 8px;
    color: var(--accent);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: .12em;
}

h1, h2, p { margin-top: 0; }

h1 {
    margin-bottom: 10px;
    font-size: clamp(28px, 5vw, 46px);
}

.subtitle { margin-bottom: 0; color: var(--muted); }

.header-link, .text-link {
    color: var(--accent-dark);
    text-decoration: none;
}

.header-link { white-space: nowrap; padding-top: 8px; }

.product-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
}

.product, .payment-panel, .lookup-panel {
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--panel);
    padding: 22px;
}

.product { display: grid; gap: 18px; }
.product form { display: grid; gap: 10px; }

.lookup-panel {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(280px, 420px);
    align-items: end;
    gap: 18px;
    margin-bottom: 16px;
}

.lookup-panel h2 { margin-bottom: 6px; }

.lookup-form {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 118px;
    gap: 10px;
}

.lookup-results {
    display: grid;
    gap: 10px;
    margin-bottom: 16px;
}

.product-top {
    display: flex;
    justify-content: space-between;
    gap: 10px;
    color: var(--muted);
    font-size: 13px;
}

.duration { color: var(--accent-dark); }
.product h2 { margin-bottom: 0; font-size: 20px; }

.product-description {
    margin: -8px 0 0;
    color: var(--muted);
    font-size: 14px;
    line-height: 1.65;
    overflow-wrap: anywhere;
}

.price {
    color: var(--accent-dark);
    font-size: 28px;
    font-weight: 700;
}

.message {
    border-radius: 6px;
    padding: 12px 14px;
    background: var(--soft);
    color: var(--accent-dark);
}

.message.error { background: #f8e2df; color: var(--danger); }

.payment-panel { max-width: 620px; margin: 0 auto; }
.payment-panel h1, .payment-panel h2 { margin-bottom: 14px; }
.payment-panel strong { color: var(--accent-dark); }
.payment-panel form { margin-top: 24px; }

.hint {
    margin: 14px 0 0;
    color: var(--muted);
    font-size: 13px;
}

.mono {
    font-family: Consolas, "Courier New", monospace;
    overflow-wrap: anywhere;
}

.card-delivery {
    display: grid;
    gap: 10px;
    margin: 24px 0 8px;
    padding: 18px;
    border: 1px dashed var(--accent);
    border-radius: 6px;
    background: var(--soft);
}

.card-delivery strong { font-size: 19px; overflow-wrap: anywhere; }

.shop-footer {
    margin-top: 34px;
    color: var(--muted);
    font-size: 13px;
    text-align: center;
}

@media (max-width: 760px) {
    .shop-shell { width: min(100% - 24px, 620px); padding-top: 30px; }
    .shop-header { display: block; margin-bottom: 24px; }
    .header-link { display: inline-block; margin-top: 16px; }
    .product-grid { grid-template-columns: 1fr; }
    .lookup-panel { grid-template-columns: 1fr; }
    .lookup-form { grid-template-columns: 1fr; }
}