* {
    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;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.container {
    width: 100%;
    max-width: 600px;
}

.email-form-wrapper {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 40px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.header {
    text-align: center;
    margin-bottom: 40px;
}

.header i {
    font-size: 3rem;
    color: #667eea;
    margin-bottom: 15px;
    display: block;
}

.header h1 {
    color: #333;
    font-size: 2.5rem;
    margin-bottom: 10px;
    font-weight: 700;
}

.header p {
    color: #666;
    font-size: 1.1rem;
}

.email-form {
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.form-group {
    position: relative;
}

.form-group label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    color: #333;
    margin-bottom: 8px;
    font-size: 1rem;
}

.form-group label i {
    color: #667eea;
    width: 16px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 15px 20px;
    border: 2px solid #e1e5e9;
    border-radius: 12px;
    font-size: 1rem;
    transition: all 0.3s ease;
    background: #fff;
    font-family: inherit;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
    transform: translateY(-2px);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.error-message {
    color: #e74c3c;
    font-size: 0.875rem;
    margin-top: 5px;
    display: block;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.error-message.show {
    opacity: 1;
}

.send-btn {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    padding: 18px 30px;
    border-radius: 12px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    margin-top: 20px;
    position: relative;
    overflow: hidden;
}

.send-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(102, 126, 234, 0.3);
}

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

.send-btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
}

.spinner {
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top: 2px solid white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    display: none;
}

.send-btn.loading .spinner {
    display: block;
}

.send-btn.loading span {
    display: none;
}

.send-btn.loading i {
    display: none;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.result-message {
    margin-top: 25px;
    padding: 15px 20px;
    border-radius: 12px;
    font-weight: 500;
    text-align: center;
    opacity: 0;
    transform: translateY(10px);
    transition: all 0.3s ease;
}

.result-message.show {
    opacity: 1;
    transform: translateY(0);
}

.result-message.success {
    background: linear-gradient(135deg, #2ecc71, #27ae60);
    color: white;
    border: 1px solid #27ae60;
}

.result-message.error {
    background: linear-gradient(135deg, #e74c3c, #c0392b);
    color: white;
    border: 1px solid #c0392b;
}

/* Responsive Design */
@media (max-width: 768px) {
    .email-form-wrapper {
        padding: 30px 25px;
        margin: 10px;
    }
    
    .header h1 {
        font-size: 2rem;
    }
    
    .header i {
        font-size: 2.5rem;
    }
    
    .form-group input,
    .form-group textarea {
        padding: 12px 15px;
    }
    
    .send-btn {
        padding: 15px 25px;
        font-size: 1rem;
    }
}

@media (max-width: 480px) {
    .email-form-wrapper {
        padding: 25px 20px;
    }
    
    .header h1 {
        font-size: 1.8rem;
    }
    
    .header p {
        font-size: 1rem;
    }
}

/* Animation for form elements */
.form-group {
    animation: slideInUp 0.6s ease forwards;
    opacity: 0;
    transform: translateY(30px);
}

.form-group:nth-child(1) { animation-delay: 0.1s; }
.form-group:nth-child(2) { animation-delay: 0.2s; }
.form-group:nth-child(3) { animation-delay: 0.3s; }
.form-group:nth-child(4) { animation-delay: 0.4s; }

.send-btn {
    animation: slideInUp 0.6s ease forwards;
    animation-delay: 0.5s;
    opacity: 0;
    transform: translateY(30px);
}

@keyframes slideInUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}