* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.container {
    background: white;
    border-radius: 16px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    max-width: 700px;
    width: 100%;
    overflow: hidden;
}

.header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 30px;
    text-align: center;
}

.header h1 {
    font-size: 2rem;
    margin-bottom: 8px;
    font-weight: 600;
}

.header p {
    font-size: 1rem;
    opacity: 0.95;
}

/* Alertas */
.alert {
    padding: 16px 20px;
    margin: 20px;
    border-radius: 8px;
    font-weight: 500;
    animation: slideDown 0.3s ease-out;
}

@keyframes slideDown {
    from {
        transform: translateY(-20px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.alert-success {
    background: #d4edda;
    color: #155724;
    border-left: 4px solid #28a745;
}

.alert-error {
    background: #f8d7da;
    color: #721c24;
    border-left: 4px solid #dc3545;
}

/* Formulario */
.email-form {
    padding: 30px;
}

.form-group {
    margin-bottom: 24px;
}

.form-group label {
    display: flex;
    align-items: center;
    font-weight: 600;
    color: #333;
    margin-bottom: 8px;
    font-size: 0.95rem;
}

.label-icon {
    margin-right: 8px;
    font-size: 1.2rem;
}

.form-group input[type="email"],
.form-group input[type="text"],
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-size: 1rem;
    font-family: inherit;
    transition: all 0.3s ease;
    background: #f8f9fa;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #667eea;
    background: white;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 200px;
    font-family: 'Consolas', 'Monaco', monospace;
    line-height: 1.6;
}

.form-hint {
    display: block;
    margin-top: 6px;
    font-size: 0.85rem;
    color: #666;
}

/* Botones */
.form-actions {
    display: flex;
    gap: 12px;
    margin-top: 30px;
}

.btn {
    flex: 1;
    padding: 14px 24px;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(102, 126, 234, 0.4);
}

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

.btn-secondary {
    background: #f8f9fa;
    color: #666;
    border: 2px solid #e0e0e0;
}

.btn-secondary:hover {
    background: #e9ecef;
    border-color: #ccc;
}

/* Footer */
.footer {
    background: #f8f9fa;
    padding: 20px 30px;
    border-top: 1px solid #e0e0e0;
}

.footer p {
    color: #666;
    font-size: 0.9rem;
    line-height: 1.6;
}

.footer code {
    background: #e9ecef;
    padding: 2px 8px;
    border-radius: 4px;
    color: #764ba2;
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 0.85rem;
}

/* Responsive */
@media (max-width: 768px) {
    body {
        padding: 10px;
    }

    .header h1 {
        font-size: 1.5rem;
    }

    .email-form {
        padding: 20px;
    }

    .form-actions {
        flex-direction: column;
    }

    .btn {
        width: 100%;
    }
}