/* Reset and base styles */
* {
    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;
    line-height: 1.6;
}

.container {
    max-width: 600px;
    margin: 0 auto;
    background: white;
    border-radius: 15px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    animation: slideUp 0.6s ease-out;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

h1 {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-align: center;
    padding: 30px 20px;
    margin: 0;
    font-size: 2.2rem;
    font-weight: 300;
    letter-spacing: 1px;
}

.contact-form {
    padding: 40px;
}

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

label {
    display: block;
    margin-bottom: 8px;
    color: #333;
    font-weight: 500;
    font-size: 0.95rem;
    letter-spacing: 0.5px;
}

input[type="text"],
input[type="email"],
textarea {
    width: 100%;
    padding: 15px 20px;
    border: 2px solid #e1e5e9;
    border-radius: 10px;
    font-size: 16px;
    font-family: inherit;
    transition: all 0.3s ease;
    background-color: #fafbfc;
}

input[type="text"]:focus,
input[type="email"]:focus,
textarea:focus {
    outline: none;
    border-color: #667eea;
    background-color: white;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
    transform: translateY(-2px);
}

textarea {
    resize: vertical;
    min-height: 120px;
    font-family: inherit;
}

.submit-btn {
    width: 100%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 18px 30px;
    border: none;
    border-radius: 10px;
    font-size: 18px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 1px;
    position: relative;
    overflow: hidden;
}

.submit-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 30px rgba(102, 126, 234, 0.4);
}

.submit-btn:active {
    transform: translateY(-1px);
}

.submit-btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

/* Error message styling */
.error-message {
    color: #e74c3c;
    font-size: 0.85rem;
    margin-top: 5px;
    display: block;
    min-height: 20px;
    opacity: 0;
    transition: opacity 0.3s ease;
}

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

/* Input error state */
input.error,
textarea.error {
    border-color: #e74c3c;
    background-color: #fdf2f2;
}

input.error:focus,
textarea.error:focus {
    box-shadow: 0 0 0 3px rgba(231, 76, 60, 0.1);
}

/* Success state */
input.success,
textarea.success {
    border-color: #27ae60;
    background-color: #f0f9f4;
}

/* Responsive design */
@media (max-width: 768px) {
    body {
        padding: 10px;
    }
    
    .container {
        margin: 10px auto;
        border-radius: 10px;
    }
    
    h1 {
        font-size: 1.8rem;
        padding: 25px 15px;
    }
    
    .contact-form {
        padding: 25px 20px;
    }
    
    .form-group {
        margin-bottom: 20px;
    }
    
    input[type="text"],
    input[type="email"],
    textarea {
        padding: 12px 15px;
        font-size: 16px; /* Prevents zoom on iOS */
    }
    
    .submit-btn {
        padding: 15px 25px;
        font-size: 16px;
    }
}

@media (max-width: 480px) {
    h1 {
        font-size: 1.5rem;
        padding: 20px 15px;
    }
    
    .contact-form {
        padding: 20px 15px;
    }
    
    .form-group {
        margin-bottom: 18px;
    }
    
    input[type="text"],
    input[type="email"],
    textarea {
        padding: 10px 12px;
    }
    
    .submit-btn {
        padding: 14px 20px;
        font-size: 15px;
    }
}

/* Loading animation for submit button */
.submit-btn.loading {
    position: relative;
    color: transparent;
}

.submit-btn.loading::after {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    top: 50%;
    left: 50%;
    margin-left: -10px;
    margin-top: -10px;
    border: 2px solid #ffffff;
    border-radius: 50%;
    border-top-color: transparent;
    animation: spin 1s linear infinite;
}

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