:root {
    --primary-color: #0d6efd;
    --success-color: #198754;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --info-color: #0dcaf0;
}

/* Form container styling */
.form-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem;
}

/* Modern form controls */
.modern-form .form-control,
.modern-form .form-select {
    border: 2px solid #e9ecef;
    border-radius: 12px;
    padding: 0.75rem 1rem;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    background-color: #fff;
}

.modern-form .form-control:hover,
.modern-form .form-select:hover {
    border-color: #86b7fe;
    background-color: #f8f9fa;
}

.modern-form .form-control:focus,
.modern-form .form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.25rem rgba(13, 110, 253, 0.25);
    transform: translateY(-2px);
}

/* Form labels */
.modern-form .form-label {
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: #2c3e50;
    font-size: 0.95rem;
}

/* Form cards */
.form-card {
    border: none;
    border-radius: 20px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.form-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 50px rgba(0, 0, 0, 0.15);
}

.form-card-header {
    background: linear-gradient(135deg, var(--primary-color), #0099ff);
    color: white;
    padding: 1.5rem;
    border-bottom: none;
}

.form-card-header h3 {
    margin: 0;
    font-weight: 600;
}

.form-card-body {
    padding: 2rem;
}

/* Button styling */
.btn-modern {
    border-radius: 50px;
    padding: 0.75rem 2rem;
    font-weight: 600;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.btn-modern::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn-modern:hover::before {
    width: 300px;
    height: 300px;
}

.btn-modern:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

/* Checkbox and radio styling */
.form-check-input-modern {
    width: 1.2em;
    height: 1.2em;
    border-radius: 0.25em;
    border: 2px solid #dee2e6;
    transition: all 0.2s;
}

.form-check-input-modern:checked {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

/* Error styling */
.form-error {
    border-color: var(--danger-color) !important;
    background-color: #fff8f8;
}

.error-message {
    color: var(--danger-color);
    font-size: 0.875rem;
    margin-top: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* Success styling */
.form-success {
    border-color: var(--success-color) !important;
}

/* Loading state */
.btn-loading {
    position: relative;
    color: transparent !important;
}

.btn-loading::after {
    content: '';
    position: absolute;
    width: 1rem;
    height: 1rem;
    top: 50%;
    left: 50%;
    margin-left: -0.5rem;
    margin-top: -0.5rem;
    border: 2px solid white;
    border-radius: 50%;
    border-top-color: transparent;
    animation: spin 0.6s linear infinite;
}

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

/* Responsive adjustments */
@media (max-width: 768px) {
    .form-container {
        padding: 1rem;
    }
    
    .form-card-body {
        padding: 1.5rem;
    }
    
    .btn-modern {
        padding: 0.6rem 1.5rem;
    }
}