.sms-link-sender-container {
    background: white;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    padding: 40px;
    max-width: 500px;
    margin: 40px auto;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

.sms-link-sender-container h1 {
    color: #333;
    margin-bottom: 30px;
    text-align: center;
    font-size: 28px;
}

.sms-link-form-group {
    margin-bottom: 25px;
}

.sms-link-form-group label {
    display: block;
    margin-bottom: 8px;
    color: #555;
    font-weight: 600;
    font-size: 14px;
}

.sms-link-form-group input[type="text"],
.sms-link-form-group input[type="tel"] {
    width: 100%;
    padding: 14px 16px;
    border: 2px solid #e0e0e0;
    border-radius: 10px;
    font-size: 16px;
    transition: all 0.3s ease;
    font-family: inherit;
}

.sms-link-form-group input[type="text"]:focus,
.sms-link-form-group input[type="tel"]:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.sms-link-sender-container button {
    width: 100%;
    padding: 16px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 10px;
    font-size: 18px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-top: 10px;
    position: relative;
}

.sms-link-sender-container button:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(102, 126, 234, 0.3);
}

.sms-link-sender-container button:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

.sms-link-message {
    padding: 15px;
    border-radius: 10px;
    margin-bottom: 20px;
    font-size: 15px;
    text-align: center;
    display: none;
    animation: slideDown 0.3s ease;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.sms-link-message.success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
    display: block;
}

.sms-link-message.error {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
    display: block;
}

.sms-link-spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255,255,255,.3);
    border-radius: 50%;
    border-top-color: #fff;
    animation: spin 1s ease-in-out infinite;
    margin-right: 10px;
    vertical-align: middle;
}

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

/* ریسپانسیو */
@media (max-width: 600px) {
    .sms-link-sender-container {
        padding: 25px;
        margin: 20px;
    }
    
    .sms-link-sender-container h1 {
        font-size: 24px;
    }
}