:root {
    --bg: #0f1620;
    --card: #18222e;
    --card-2: #1e2a38;
    --text: #eef3f8;
    --muted: #93a4b5;
    --accent: #2ea6ff;
    --ok: #2fbf71;
    --err: #e05252;
    --radius: 16px;
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }

html, body {
    margin: 0;
    padding: 0;
    background: var(--bg);
    color: var(--text);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    font-size: 16px;
    line-height: 1.45;
}

body { padding: max(12px, env(safe-area-inset-top)) 14px max(20px, env(safe-area-inset-bottom)); }

.screen { max-width: 520px; margin: 0 auto; }

.head { padding: 6px 2px 14px; }
.head.compact { padding-bottom: 8px; }
.head h1 { font-size: 22px; margin: 0 0 4px; font-weight: 650; letter-spacing: -0.2px; }
.logo { font-weight: 700; color: var(--accent); letter-spacing: 0.4px; margin-bottom: 6px; }

.muted { color: var(--muted); }
.small { font-size: 13px; }
.center { text-align: center; }
.error { color: var(--err); font-size: 14px; margin-top: 10px; }

.products { display: flex; flex-direction: column; gap: 10px; margin-bottom: 14px; }

.card {
    display: flex;
    align-items: center;
    gap: 12px;
    background: var(--card);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: var(--radius);
    padding: 14px;
    cursor: pointer;
    transition: border-color .15s ease, background .15s ease;
}
.card input { position: absolute; opacity: 0; pointer-events: none; }
.card.selected { border-color: var(--accent); background: var(--card-2); }
.card-body { display: flex; flex-direction: column; gap: 3px; flex: 1 1 auto; min-width: 0; }
.card-title { font-weight: 600; }
.card-desc { color: var(--muted); font-size: 13px; }
.card-price { font-weight: 650; white-space: nowrap; }
.card-price small { color: var(--muted); font-weight: 500; }

.amount-block {
    background: var(--card);
    border-radius: var(--radius);
    padding: 14px;
    margin-bottom: 14px;
}
.amount-block label { display: block; color: var(--muted); font-size: 13px; margin-bottom: 6px; }
.amount-block input {
    width: 100%;
    padding: 12px;
    font-size: 18px;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.12);
    background: #101a24;
    color: var(--text);
}

.btn {
    display: block;
    width: 100%;
    padding: 15px 16px;
    font-size: 17px;
    font-weight: 600;
    border-radius: 14px;
    border: 0;
    cursor: pointer;
    color: #04121c;
    background: var(--accent);
    margin: 6px 0 12px;
}
.btn[disabled] { opacity: .6; }
.btn.ghost { background: transparent; color: var(--text); border: 1px solid rgba(255, 255, 255, .18); }

.frame-wrap { position: relative; margin: 4px 0 12px; }
.frame-wrap iframe {
    width: 100%;
    height: 62vh;
    min-height: 420px;
    border: 0;
    border-radius: var(--radius);
    background: #ffffff;
}

.status { text-align: center; padding: 12px 4px; }
.status-title { font-size: 17px; font-weight: 650; margin: 0 0 4px; }
.status.paid .status-title { color: var(--ok); }
.status.declined .status-title { color: var(--err); }

.pay .amount { font-size: 34px; font-weight: 700; margin: 2px 0 6px; }
.pay .amount small { font-size: 16px; color: var(--muted); font-weight: 500; }

code { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 12px; color: var(--muted); }
.hidden { display: none !important; }

@media (prefers-color-scheme: light) {
    :root {
        --bg: #f3f6fa;
        --card: #ffffff;
        --card-2: #eef4fb;
        --text: #101a24;
        --muted: #61707f;
    }
    .amount-block input { background: #f6f9fc; color: var(--text); }
    .btn { color: #ffffff; }
    .card { border-color: rgba(16, 26, 36, .08); }
}