:root {
    --whatsapp-green: #25D366;
    --whatsapp-dark-green: #128C7E;
    --whatsapp-light-green: #DCF8C6;
    --whatsapp-bg: #E5DDD5;
    --whatsapp-dark: #075E54;
}

body {
    background: linear-gradient(135deg, var(--whatsapp-bg) 0%, #f0f0f0 100%);
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    min-height: 100vh;
    padding: 20px 0;
}

.whatsapp-container {
    max-width: 500px;
    margin: 0 auto;
    background: white;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    overflow: hidden;
}

.whatsapp-header {
    background: linear-gradient(135deg, var(--whatsapp-green) 0%, var(--whatsapp-dark-green) 100%);
    color: white;
    padding: 25px 30px;
    text-align: center;
    position: relative;
}

.whatsapp-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="20" cy="20" r="2" fill="rgba(255,255,255,0.1)"/><circle cx="80" cy="40" r="1.5" fill="rgba(255,255,255,0.1)"/><circle cx="40" cy="70" r="1" fill="rgba(255,255,255,0.1)"/></svg>');
}

.whatsapp-header h1 {
    margin: 0;
    font-size: 1.8rem;
    font-weight: 600;
    position: relative;
    z-index: 1;
}

.whatsapp-icon {
    font-size: 2.5rem;
    margin-bottom: 10px;
    position: relative;
    z-index: 1;
}

.form-container {
    padding: 30px;
}

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

.form-label {
    color: var(--whatsapp-dark);
    font-weight: 600;
    margin-bottom: 8px;
    font-size: 0.95rem;
    display: flex;
    align-items: center;
    gap: 8px;
}

.form-control {
    border: 2px solid #e9ecef;
    border-radius: 12px;
    padding: 12px 16px;
    font-size: 1rem;
    transition: all 0.3s ease;
    background: #fafafa;
}

.form-control:focus {
    border-color: var(--whatsapp-green);
    box-shadow: 0 0 0 0.2rem rgba(37, 211, 102, 0.25);
    background: white;
}

.form-control::placeholder {
    color: #999;
}

textarea.form-control {
    resize: vertical;
    min-height: 100px;
}

.btn-whatsapp {
    background: linear-gradient(135deg, var(--whatsapp-green) 0%, var(--whatsapp-dark-green) 100%);
    border: none;
    color: white;
    padding: 15px 30px;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1.1rem;
    transition: all 0.3s ease;
    width: 100%;
    position: relative;
    overflow: hidden;
}

.btn-whatsapp:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(37, 211, 102, 0.4);
    color: white;
}

.btn-whatsapp:active {
    transform: translateY(0);
}

.input-group-text {
    background: var(--whatsapp-light-green);
    border: 2px solid #e9ecef;
    border-right: none;
    border-radius: 12px 0 0 12px;
    color: var(--whatsapp-dark);
    font-weight: 600;
}

.input-group .form-control {
    border-left: none;
    border-radius: 0 12px 12px 0;
}

.input-group:focus-within .input-group-text {
    border-color: var(--whatsapp-green);
}

.feature-badge {
    background: var(--whatsapp-light-green);
    color: var(--whatsapp-dark);
    padding: 4px 8px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
}

.form-text {
    color: #666;
    font-size: 0.85rem;
    margin-top: 5px;
}

@media (max-width: 576px) {
    .whatsapp-container {
        margin: 0 15px;
        border-radius: 15px;
    }
    
    .form-container {
        padding: 20px;
    }
    
    .whatsapp-header {
        padding: 20px;
    }
}

.pulse-animation {
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}