:root {
    --des-primary: #0073C2;
    --des-primary-hover: #005a99;
    --des-text: #4B4B4B;
    --des-muted: #7A7A7A;
    --des-bg: #EFEFEF;
    --des-card: #FFFFFF;
    --des-border: #D9D9D9;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    background-color: var(--des-bg);
    color: var(--des-text);
    font-family: "Montserrat", sans-serif;
    font-size: 16px;
    font-weight: 400;
    line-height: 1.6;
}

.sms-optin-page {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.sms-optin-header {
    background: var(--des-card);
    border-bottom: 1px solid var(--des-border);
    padding: 24px 20px;
    text-align: center;
}

.sms-optin-header img {
    width: 220px;
    max-width: 100%;
    height: auto;
}

.sms-optin-main {
    flex: 1;
    display: flex;
    justify-content: center;
    padding: 40px 20px 60px;
}

.sms-optin-card {
    width: 100%;
    max-width: 720px;
    background: var(--des-card);
    border-radius: 8px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
    padding: 40px 36px;
}

.sms-optin-greeting {
    margin: 0 0 24px;
    color: var(--des-primary);
    font-size: 32px;
    font-weight: 300;
    line-height: 1.25;
}

.sms-optin-intro {
    margin: 0 0 32px;
    color: var(--des-text);
    font-size: 16px;
}

.sms-optin-intro a {
    color: var(--des-primary);
    text-decoration: none;
}

.sms-optin-intro a:hover {
    text-decoration: underline;
}

.sms-optin-phone {
    color: var(--des-text);
}

.sms-optin-message {
    margin: 0 0 24px;
    padding: 12px 16px;
    border-radius: 4px;
    font-size: 15px;
}

.sms-optin-message-error {
    background: #fdecea;
    color: #b42318;
    border: 1px solid #f5c2c0;
}

.sms-optin-message-success {
    background: #ecfdf3;
    color: #027a48;
    border: 1px solid #abefc6;
}

.loading-spinner {
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255, 255, 255, 0.35);
    border-top-color: #ffffff;
    border-radius: 50%;
    animation: sms-optin-spin 0.8s linear infinite;
}

.sms-optin-button-content {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

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

.sms-optin-checkboxes {
    display: flex;
    flex-direction: column;
    gap: 18px;
    margin-bottom: 28px;
}

.sms-optin-checkbox {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    cursor: pointer;
    color: var(--des-text);
    font-size: 15px;
}

.sms-optin-checkbox input[type="checkbox"] {
    width: 18px;
    height: 18px;
    margin-top: 3px;
    flex-shrink: 0;
    accent-color: var(--des-primary);
    cursor: pointer;
}

.sms-optin-checkbox a {
    color: var(--des-primary);
    text-decoration: none;
}

.sms-optin-checkbox a:hover {
    text-decoration: underline;
}

.sms-optin-button {
    display: inline-block;
    min-width: 160px;
    padding: 12px 28px;
    border: none;
    border-radius: 4px;
    background-color: var(--des-primary);
    color: #FFFFFF;
    font-family: "Montserrat", sans-serif;
    font-size: 15px;
    font-weight: 600;
    letter-spacing: 0.02em;
    cursor: pointer;
    transition: background-color 0.2s ease, opacity 0.2s ease;
}

.sms-optin-button:hover:not(:disabled) {
    background-color: var(--des-primary-hover);
}

.sms-optin-button:disabled {
    opacity: 0.45;
    cursor: not-allowed;
}

@media (max-width: 767px) {
    .sms-optin-card {
        padding: 28px 22px;
    }

    .sms-optin-greeting {
        font-size: 26px;
    }
}