:root {
    --bg: #f5f7fb;
    --card: #ffffff;
    --text: #1f2937;
    --muted: #6b7280;
    --brand: #0f766e;
    --brand-dark: #115e59;
    --danger: #b91c1c;
    --line: #d9e2ec;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: "Segoe UI", "Noto Sans", sans-serif;
    background: radial-gradient(circle at top right, #d1fae5, transparent 45%), var(--bg);
    color: var(--text);
}

.wrap {
    max-width: 920px;
    margin: 24px auto 40px;
    padding: 0 16px;
}

h1 { margin: 0 0 8px; }
.subtitle { color: var(--muted); margin-bottom: 16px; }

.card {
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: 12px;
    padding: 16px;
    margin-bottom: 12px;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 12px;
}

.row { display: flex; gap: 8px; flex-wrap: wrap; }

label {
    display: flex;
    flex-direction: column;
    gap: 6px;
    font-size: 14px;
}

input {
    border: 1px solid #c8d0da;
    border-radius: 8px;
    padding: 10px 12px;
    font-size: 14px;
}

button {
    margin-top: 10px;
    border: 0;
    border-radius: 8px;
    padding: 10px 14px;
    cursor: pointer;
    background: var(--brand);
    color: white;
    font-weight: 600;
}
button:hover { background: var(--brand-dark); }

.pay-btn {
    background: #0b5ed7;
}

.info {
    margin-top: 10px;
    padding: 10px;
    border: 1px solid #d1e3ff;
    background: #f0f6ff;
    border-radius: 8px;
}

.info.error {
    border-color: #fecaca;
    background: #fef2f2;
    color: var(--danger);
}

.status {
    position: sticky;
    bottom: 8px;
    background: #ecfeff;
    border: 1px solid #bae6fd;
    border-radius: 10px;
    padding: 10px;
}

.status.error {
    background: #fef2f2;
    border-color: #fecaca;
    color: var(--danger);
}

.hidden { display: none; }
.muted { color: var(--muted); }

.coupon-list {
    margin-top: 12px;
    display: grid;
    gap: 8px;
}

.coupon-item {
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 10px;
    display: flex;
    gap: 10px;
    align-items: flex-start;
}

.coupon-main {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.disc {
    font-size: 13px;
    color: #0f766e;
}