/* ─── Reset & Base ─────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 30px 15px;
}

/* ─── Card Wrapper ─────────────────────────────────────────────────────────── */
.payment-wrapper {
    width: 100%;
    max-width: 560px;
}

.payment-card {
    background: #ffffff;
    border-radius: 20px;
    box-shadow: 0 25px 60px rgba(0, 0, 0, 0.4);
    overflow: hidden;
}

/* ─── Header ───────────────────────────────────────────────────────────────── */
.card-header {
    background: linear-gradient(135deg, #0052cc, #003d99);
    padding: 28px 35px;
    color: white;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.card-header h2 {
    font-size: 22px;
    font-weight: 700;
    letter-spacing: 0.5px;
}

.card-header p {
    font-size: 13px;
    opacity: 0.8;
    margin-top: 4px;
}

.card-icons { display: flex; gap: 8px; align-items: center; }

.card-icons span {
    background: rgba(255,255,255,0.15);
    border-radius: 6px;
    padding: 5px 10px;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 1px;
    color: #fff;
}

.card-icons span.visa   { background: #1a1f71; }
.card-icons span.mc     { background: #eb001b; }
.card-icons span.amex   { background: #2e77bc; }

/* ─── Amount Banner ────────────────────────────────────────────────────────── */
.amount-banner {
    background: #f0f7ff;
    border-bottom: 1px solid #d0e4ff;
    padding: 18px 35px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.amount-banner label {
    font-size: 13px;
    color: #555;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.amount-input-wrap {
    display: flex;
    align-items: center;
    background: #fff;
    border: 2px solid #0052cc;
    border-radius: 10px;
    padding: 6px 14px;
    gap: 6px;
}

.amount-input-wrap .currency-symbol {
    font-size: 20px;
    font-weight: 700;
    color: #0052cc;
}

.amount-input-wrap input {
    border: none;
    outline: none;
    font-size: 22px;
    font-weight: 700;
    color: #0052cc;
    width: 110px;
    text-align: right;
    background: transparent;
}

/* ─── Form Body ────────────────────────────────────────────────────────────── */
.card-body { padding: 30px 35px; }

.section-title {
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: #888;
    font-weight: 700;
    margin: 20px 0 14px;
    padding-bottom: 6px;
    border-bottom: 1px solid #eee;
}

.section-title:first-child { margin-top: 0; }

.form-group { margin-bottom: 16px; }

.form-group label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: #444;
    margin-bottom: 6px;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 12px 14px;
    border: 1.5px solid #dde3ec;
    border-radius: 10px;
    font-size: 14px;
    color: #333;
    background: #fafafa;
    transition: border-color 0.2s, box-shadow 0.2s;
    outline: none;
}

.form-group input:focus,
.form-group select:focus {
    border-color: #0052cc;
    background: #fff;
    box-shadow: 0 0 0 3px rgba(0, 82, 204, 0.1);
}

.form-row { display: flex; gap: 14px; }
.form-row .form-group { flex: 1; }

/* ─── Alerts ───────────────────────────────────────────────────────────────── */
.alert {
    border-radius: 10px;
    padding: 14px 18px;
    margin-bottom: 20px;
    font-size: 14px;
    display: flex;
    align-items: flex-start;
    gap: 10px;
}

.alert-success { background: #e6f9f0; border-left: 4px solid #00b87a; color: #006b47; }
.alert-danger  { background: #fff0f0; border-left: 4px solid #e03434; color: #a00000; }
.alert ul      { margin: 8px 0 0 18px; }
.alert ul li   { margin-bottom: 4px; }

.success-details {
    margin-top: 10px;
    font-size: 13px;
    background: rgba(255,255,255,0.6);
    padding: 10px 12px;
    border-radius: 8px;
    line-height: 1.8;
}

/* ─── Submit Button ────────────────────────────────────────────────────────── */
.btn-pay {
    width: 100%;
    padding: 16px;
    background: linear-gradient(135deg, #0052cc, #003d99);
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 17px;
    font-weight: 700;
    letter-spacing: 0.5px;
    cursor: pointer;
    transition: transform 0.15s, box-shadow 0.15s, opacity 0.15s;
    margin-top: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.btn-pay:hover  { transform: translateY(-2px); box-shadow: 0 8px 25px rgba(0,82,204,0.4); }
.btn-pay:active { transform: translateY(0); opacity: 0.9; }
.btn-pay:disabled { opacity: 0.7; cursor: not-allowed; }

/* ─── Footer ───────────────────────────────────────────────────────────────── */
.card-footer {
    padding: 16px 35px 22px;
    text-align: center;
    font-size: 12px;
    color: #aaa;
    border-top: 1px solid #f0f0f0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
}

.card-footer span { color: #0052cc; font-weight: 600; }

/* ─── Responsive ───────────────────────────────────────────────────────────── */
@media (max-width: 480px) {
    .card-header, .card-body, .amount-banner, .card-footer { padding-left: 20px; padding-right: 20px; }
    .form-row { flex-direction: column; gap: 0; }
}