* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
    background: #f2f4f7;
    color: #1a1d29;
}

.page-shell {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
}

.payment-card, .result-card {
    width: 100%;
    max-width: 440px;
    background: #ffffff;
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(20, 20, 43, 0.08);
    padding: 32px;
}

.brand-header {
    text-align: center;
    margin-bottom: 24px;
}

.brand-text {
    font-size: 22px;
    font-weight: 700;
    letter-spacing: 0.2px;
}

.alert {
    padding: 12px 14px;
    border-radius: 10px;
    font-size: 14px;
    margin-bottom: 16px;
}

.alert-error {
    background: #fdecec;
    color: #b3261e;
    border: 1px solid #f5c6c3;
}

.field-group {
    margin-bottom: 16px;
    flex: 1;
}

.field-row {
    display: flex;
    gap: 12px;
}

label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 6px;
    color: #4b4f5c;
}

input[type="text"], input[type="email"] {
    width: 100%;
    padding: 12px 14px;
    border-radius: 10px;
    border: 1px solid #d9dce3;
    font-size: 15px;
    background: #fafbfc;
}

input:focus {
    outline: none;
    border-color: #4b5bff;
    background: #fff;
}

.package-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.package-option {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 14px;
    border: 1px solid #d9dce3;
    border-radius: 10px;
    cursor: pointer;
    font-size: 14px;
}

.package-option input {
    margin: 0;
}

.package-name {
    flex: 1;
    font-weight: 500;
}

.package-price {
    font-weight: 700;
    color: #1a1d29;
}

.btn-submit {
    width: 100%;
    padding: 14px;
    border: none;
    border-radius: 12px;
    background: #4b5bff;
    color: #fff;
    font-size: 16px;
    font-weight: 700;
    cursor: pointer;
    margin-top: 8px;
}

.btn-submit:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn-submit:hover:not(:disabled) {
    background: #3b48d1;
}

.result-card {
    text-align: center;
}

.result-icon {
    width: 56px;
    height: 56px;
    line-height: 56px;
    border-radius: 50%;
    font-size: 26px;
    margin: 0 auto 16px;
    font-weight: 700;
}

.result-icon.success {
    background: #e5f7ec;
    color: #1e8e3e;
}

.result-icon.pending {
    background: #fff6e0;
    color: #a86400;
}

.result-icon.error {
    background: #fdecec;
    color: #b3261e;
}

.btn-link {
    display: inline-block;
    margin-top: 18px;
    color: #4b5bff;
    text-decoration: none;
    font-weight: 600;
}