:root {
    --accent: #b3122e;
    --accent-dark: #8c0e24;
    --text: #1d1d1f;
    --muted: #6b6b70;
    --bg: #f4f4f6;
    --panel: #ffffff;
    --border: #dcdce0;
    --error: #c0261b;
    --error-bg: #fdecea;
    --success: #1d7a3a;
    --success-bg: #e7f6ec;
    --radius: 10px;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
    margin: 0; background: var(--bg); color: var(--text);
    font: 16px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
a { color: var(--accent); }
h1 { font-size: 1.75rem; line-height: 1.2; margin: 0 0 .75rem; }
h2 { font-size: 1.2rem; margin: 0 0 1rem; }

.wrap { max-width: 760px; margin: 0 auto; padding: 0 16px; }
.wrap-wide { max-width: 1200px; }

.site-header { background: var(--accent); color: #fff; padding: 14px 0; margin-bottom: 24px; }
body.env-test .site-header { background: #b45309; }
.env-banner { background: #b45309; color: #fff; padding: 5px 12px; text-align: center; font-size: .85rem; font-weight: 700; letter-spacing: .03em; }
.site-header .wrap { display: flex; align-items: baseline; gap: 12px; flex-wrap: wrap; }
.brand { font-weight: 700; font-size: 1.2rem; }
.brand-sub { opacity: .85; font-weight: 400; font-size: .95rem; }
.site-footer { color: var(--muted); font-size: .875rem; padding: 24px 16px 40px; }

.intro { margin-bottom: 20px; }
.price-tag { display: inline-block; background: #fff; border: 1px solid var(--border); border-radius: 999px; padding: 4px 14px; font-weight: 600; }

.panel { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; margin-bottom: 20px; }
.panel.narrow { max-width: 460px; margin-left: auto; margin-right: auto; }

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 0 16px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0 16px; }
.span-2 { grid-column: span 2; }
@media (max-width: 900px) { .grid-4 { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px) { .grid-2, .grid-4 { grid-template-columns: 1fr; } .span-2 { grid-column: auto; } }

.field { margin-bottom: 14px; }
.field label { display: block; font-weight: 600; font-size: .9rem; margin-bottom: 4px; }
.req { color: var(--accent); }
input[type=text], input[type=email], input[type=tel], input[type=date], input[type=password], input[type=number],
input[type=search], input[type=url], select, textarea {
    width: 100%; padding: 10px 12px; font: inherit; color: inherit; background: #fff;
    border: 1px solid var(--border); border-radius: 8px;
}
input[type=color] { width: 64px; height: 42px; padding: 2px; border: 1px solid var(--border); border-radius: 8px; background: #fff; }
input:focus, select:focus, textarea:focus { outline: 2px solid var(--accent); outline-offset: 1px; border-color: var(--accent); }
.has-error input, .has-error select, .has-error textarea { border-color: var(--error); background: var(--error-bg); }
.error-text { color: var(--error); font-size: .85rem; margin: 4px 0 0; }
.hint { color: var(--muted); font-size: .9rem; }
.checkbox label, label.checkbox { display: flex; gap: 10px; align-items: flex-start; font-weight: 400; }
.checkbox input { margin-top: 4px; width: 18px; height: 18px; flex: none; }
fieldset.delivery { border: 0; padding: 0; min-width: 0; }
fieldset.delivery legend { font-weight: 600; font-size: .9rem; margin-bottom: 4px; padding: 0; }
.delivery-options { display: grid; grid-template-columns: 1fr 1fr; gap: 8px 16px; }
.delivery-option { display: flex; gap: 10px; align-items: flex-start; border: 1px solid var(--border); border-radius: 8px; padding: 8px 12px; cursor: pointer; font-weight: 400; }
.delivery-option:has(input:checked) { border-color: var(--accent); }
.delivery-option input { margin-top: 4px; width: 18px; height: 18px; flex: none; }
@media (max-width: 560px) { .delivery-options { grid-template-columns: 1fr; } }

.card-item { position: relative; border: 1px solid var(--border); border-radius: 8px; padding: 12px 16px 4px; margin: 0 0 14px; }
.card-item legend { font-weight: 700; padding: 0 6px; }
.remove-card { position: absolute; right: 12px; top: -2px; }

.button {
    display: inline-block; padding: 11px 20px; font: inherit; font-weight: 600; text-decoration: none; cursor: pointer;
    color: #fff; background: var(--accent); border: 1px solid var(--accent); border-radius: 8px;
}
.button:hover { background: var(--accent-dark); }
.button-secondary { background: #fff; color: var(--text); border-color: var(--border); }
.button-secondary:hover { background: #f0f0f2; }
.button-danger { background: var(--error); border-color: var(--error); }
.link-button { background: none; border: 0; padding: 0; color: var(--accent); font: inherit; cursor: pointer; text-decoration: underline; }
#copy-buyer { margin-bottom: 12px; }

.total { font-size: 1.15rem; }
.alert { padding: 12px 16px; border-radius: 8px; margin-bottom: 16px; }
.alert-error { background: var(--error-bg); color: var(--error); border: 1px solid #f3c4bf; }
.alert-success { background: var(--success-bg); color: var(--success); border: 1px solid #bfe5cb; }

dl.payment { display: grid; grid-template-columns: max-content 1fr; gap: 6px 16px; margin: 0 0 16px; }
dl.payment dt { color: var(--muted); }
dl.payment dd { margin: 0; }

.hp { position: absolute; left: -10000px; width: 1px; height: 1px; overflow: hidden; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
[hidden] { display: none !important; }
.email-suggest { margin: -4px 0 8px; }