* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter',-apple-system,BlinkMacSystemFont,sans-serif;
}

body {
    background: #e6e6e6;
    display: flex;
    justify-content: center;
}

.app {
    width: 100%;
    max-width: 390px; 
    min-height: 100vh;
    background: #F6F6F8;
    position: relative;
    padding-bottom: 110px;
}

/* Header */
.header {
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    font-weight: 600;
    border-bottom: 1px solid #E2E8F0;
    position: relative;
}

.back {
    position: absolute;
    left: 16px;
    font-size: 20px;
}

/* Item Summary */
.summary {
    margin: 24px 16px;
    padding: 16px;
    background: #fff;
    border-radius: 12px;
    display: flex;
    gap: 16px;
    align-items: center;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.04);
    border: solid 1px #F1F5F9;
}

    .summary img {
        width: 80px;
        height: 80px;
        border-radius: 8px;
        object-fit: cover;
    }

    .summary small {
        font-size: 12px;
        font-weight: 500;
        color: #64748B;
        letter-spacing: .6px;
    }

    .summary h3 {
        font-size: 15px;
        font-weight: 600;
        margin-top: 4px;
    }

.price {
    margin-top: 6px;
    font-size: 18px;
    font-weight: 700;
    color: #1d4ed8;
}

/* Section */
.section-title {
    margin: 10px 16px 6px;
    font-size: 18px;
    font-weight: 700;
}

.card-icons {
    float: right;
    gap: 8px;
    display: flex;
}

label {
    padding-left: 4px;
}
/* Form */
.form-group {
    margin: 14px 16px;
}

label {
    font-size: 13px;
    font-weight: 500;
    color: #4b5563;
    display: block;
    margin-bottom: 6px;
}

input {
    width: 100%;
    height: 56px;
    border: 1px solid #E2E8F0;
    border-radius: 12px;
    padding: 0 14px;
    font-size: 15px;
    background: #FFFFFF;
    outline: none;
}

    input::placeholder {
        color: #9ca3af;
    }

.row {
    display: flex;
    gap: 12px;
    margin: 0 16px;
}

.col {
    flex: 1;
}

.input-wrapper {
    position: relative;
}

.input-icon {
    position: absolute;
    right: 14px;
    top: 40%;
    transform: translateY(-50%);
    display: flex;
    align-items: center;
    pointer-events: none;
}

.input-wrapper input {
    padding-right: 44px;
}

/* Security */
.secure {
    margin: 14px 16px;
    font-size: 12px;
    color: #64748B;
    display: flex;
    align-items: center;
    gap: 7.99px;
    padding-top: 8px;
    padding-bottom: 8px;
}

.secure span {
  color: #16a34a;
}

/* Other Payment */
.other {
    text-align: center;
    margin-top: 18px;
    font-size: 14px;
    font-weight: 600;
    color: #135BEC;
    cursor:pointer;
}

.terms {
    text-align: center;
    font-size: 10px;
    color: #94A3B8;
    margin: 8px 32px;
    line-height: 1.4;
    font-weight: 400;
}

/* Fixed Bottom Button */
.footer {
    position: fixed;
    bottom: 0;
    width: 100%;
    max-width: 390px;
    background: #ffffff;
    padding: 16px;
    padding-bottom: calc(16px + env(safe-area-inset-bottom));
    box-shadow: 0 -4px 12px rgba(0, 0, 0, 0.05);
    border: solid 1px #E2E8F0;
}

.pay-btn {
    width: 100%;
    height: 56px;
    background: linear-gradient(90deg, #2563eb, #1d4ed8);
    border: none;
    border-radius: 12px;
    color: #ffffff;
    font-size: 17px;
    font-weight: 600;
    cursor: pointer;
    box-shadow: 0px 4px 6px -4px rgba(19, 91, 236, 0.2), 0px 10px 15px 0px rgba(19, 91, 236, 0.2);
}

.pay-btn span {
    padding-right: 8px;
}

.pay-btn .dot {
    position: relative;
    bottom: 4px;
}

/* validation */
input.error {
    border: 1px solid #ef4444;
}

.error-message {
    color: #ef4444;
    font-size: 12px;
    margin-top: 4px;
    display: block;
    padding: 4px 14px;
}

/* pay btn */
.loader {
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255, 255, 255, 0.4);
    border-top: 2px solid white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    position: absolute;
    margin-top: 4px;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

.pay-btn.loading {
    opacity: 0.8;
    pointer-events: none;
}