/* Base styles with CSS custom properties */
:root {
    --primary-color: #007bff;
    --primary-hover: #0056b3;
    --danger-color: #dc3545;
    --success-color: #28a745;
    --text-primary: #2c3e50;
    --text-secondary: #64748b;
    --bg-light: #f8fafc;
    --border-color: #e1e8ef;
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.07);
    --shadow-lg: 0 10px 40px rgba(0,0,0,0.08);
    --transition-base: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.contact-form-section {
    padding: 60px 0;
    background-color: var(--bg-light);
    will-change: transform;
}

.contact-form {
    background: #fff;
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    transform: translateZ(0);
    transition: var(--transition-base);
    max-width: 900px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.contact-form:hover {
    box-shadow: 0 15px 50px rgba(0,0,0,0.12);
}

.contact-form .form-section {
    padding: 30px 35px;
}

.contact-form .form-group {
    margin-bottom: 1.5rem;
    position: relative;
}

/* Enhanced accessibility for labels */
.contact-form label {
    font-weight: 500;
    margin-bottom: 10px;
    color: var(--text-primary);
    font-size: 0.95rem;
    transition: color 0.3s ease;
    display: block;
    cursor: pointer;
}

.contact-form label.required::after {
    content: ' *';
    color: var(--danger-color);
    font-weight: 400;
}

/* Improved form controls */
.contact-form .form-control {
    padding: 12px 16px;
    border: 1.5px solid var(--border-color);
    border-radius: 8px;
    height: auto;
    font-size: 0.95rem;
    transition: var(--transition-base);
    background-color: var(--bg-light);
    width: 100%;
    outline: none;
}

.contact-form .form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0,123,255,0.1);
    background-color: #fff;
}

.contact-form .form-control:hover {
    border-color: #b8c2cc;
    background-color: #fff;
}

/* Enhanced textarea */
.contact-form textarea.form-control {
    min-height: 120px;
    resize: vertical;
    line-height: 1.6;
}

/* Enhanced submit button */
.contact-form .submit-btn {
    background-color: var(--primary-color);
    color: #fff;
    padding: 14px 28px;
    border-radius: 8px;
    border: none;
    font-weight: 500;
    font-size: 1rem;
    transition: var(--transition-base);
    box-shadow: var(--shadow-md);
    width: auto;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.contact-form .submit-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255,255,255,0.1);
    transform: translateX(-100%);
    transition: transform 0.3s ease;
}

.contact-form .submit-btn:hover {
    background-color: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: 0 6px 8px rgba(0,123,255,0.15);
}

.contact-form .submit-btn:hover::before {
    transform: translateX(0);
}

.contact-form .submit-btn:disabled {
    background-color: #cbd5e1;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.contact-form .submit-btn:disabled::before {
    display: none;
}

/* Form feedback */
.contact-form .form-text {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-top: 4px;
}

.contact-form .alert {
    border: none;
    border-radius: 12px;
    padding: 16px 20px;
    margin-top: 20px;
    display: flex;
    align-items: center;
    gap: 12px;
    animation: slideIn 0.3s ease-out;
    font-weight: 500;
}

.contact-form .alert-success {
    background-color: #d1fae5;
    color: #065f46;
}

.contact-form .alert-danger {
    background-color: #fee2e2;
    color: #991b1b;
}

.contact-form .alert i {
    font-size: 1.25rem;
    flex-shrink: 0;
}

/* Animations */
@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Form validation */
.contact-form .form-control.is-invalid {
    border-color: var(--danger-color);
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='none' stroke='%23dc3545' viewBox='0 0 12 12'%3e%3ccircle cx='6' cy='6' r='4.5'/%3e%3cpath stroke-linejoin='round' d='M5.8 3.6h.4L6 6.5z'/%3e%3ccircle cx='6' cy='8.2' r='.6' fill='%23dc3545' stroke='none'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right calc(0.375em + 0.1875rem) center;
    background-size: calc(0.75em + 0.375rem) calc(0.75em + 0.375rem);
    padding-right: calc(1.5em + 0.75rem);
}

.contact-form .invalid-feedback {
    display: none;
    color: var(--danger-color);
    font-size: 0.875rem;
    margin-top: 0.5rem;
    font-weight: 500;
}

.contact-form .form-control.is-invalid + .invalid-feedback {
    display: block;
    animation: fadeIn 0.3s ease-in-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-5px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Mobile responsiveness */
@media (max-width: 768px) {
    .contact-form .form-section {
        padding: 20px;
    }
    
    .contact-form .submit-btn {
        width: 100%;
        justify-content: center;
    }
    
    .contact-form .form-group {
        margin-bottom: 1.25rem;
    }
}