* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Segoe UI", sans-serif;
}

body {
    background: linear-gradient(135deg, #eef2f7, #f8f9fb);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

/* MAIN CARD WRAPPER */
.payment-container {
    width: 100%;
    max-width: 600px;
    background: #fff;
    border-radius: 16px;
    padding: 30px;
    box-shadow: 0 15px 40px rgba(0,0,0,0.12);
}

/* HEADER */
.payment-header {
    text-align: center;
    margin-bottom: 20px;
}

.payment-header h1 {
    font-size: 2rem;
    color: #222;
}

.payment-header p {
    color: #666;
    font-size: 14px;
}

/* TOGGLE BUTTONS */
.method-select {
    display: flex;
    gap: 10px;
    margin: 20px 0;
}

.method-btn {
    flex: 1;
    padding: 12px;
    border: none;
    border-radius: 10px;
    background: #f1f1f1;
    cursor: pointer;
    font-weight: 600;
    transition: 0.3s;
}

.method-btn.active {
    background: #007bff;
    color: white;
}

/* PAYMENT BOXES */
.payment-card,
.payment-whatsapp {
    margin-top: 10px;
}

/* FORM */
.form-group {
    margin-bottom: 15px;
}

.form-group label {
    font-size: 13px;
    color: #444;
    margin-bottom: 5px;
    display: block;
}

.form-group input {
    width: 100%;
    padding: 12px;
    border-radius: 8px;
    border: 1px solid #ddd;
    outline: none;
}

/* ROW */
.form-row {
    display: flex;
    gap: 10px;
}

/* BUTTON */
.pay-btn {
    width: 100%;
    padding: 14px;
    border: none;
    background: #007bff;
    color: white;
    font-weight: bold;
    border-radius: 10px;
    cursor: pointer;
    margin-top: 10px;
}

.pay-btn:hover {
    background: #0056b3;
}

/* WHATSAPP */
.payment-whatsapp {
    text-align: center;
}

.whatsapp-btn {
    display: inline-block;
    margin-top: 10px;
    padding: 14px 20px;
    background: #25D366;
    color: white;
    border-radius: 10px;
    text-decoration: none;
    font-weight: bold;
}

/* MOBILE */
@media (max-width: 500px) {
    .form-row {
        flex-direction: column;
    }

    .payment-container {
        padding: 20px;
    }
}