/**
 * Custom Checkbox Design
 * Moderne, ansprechende Checkboxen mit besserer visueller Abgrenzung
 */

/* ===================================
   CHECKBOX GROUPS - CONTAINER
   =================================== */

.checkbox-group {
    background: var(--color-gray-50);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-4);
    margin-top: var(--spacing-3);
}

.checkbox-group-bordered {
    background: white;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-5);
    margin-top: var(--spacing-3);
    box-shadow: var(--shadow-sm);
}

.checkbox-group-title {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-gray-700);
    margin-bottom: var(--spacing-3);
    display: block;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* ===================================
   CUSTOM CHECKBOX WRAPPER
   =================================== */

.checkbox-wrapper {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    padding: var(--spacing-3);
    margin-bottom: var(--spacing-2);
    border-radius: var(--radius-md);
    transition: background-color var(--transition-fast);
    cursor: pointer;
    position: relative;
}

.checkbox-wrapper:hover {
    background-color: rgba(30, 64, 175, 0.03);
}

.checkbox-wrapper:last-child {
    margin-bottom: 0;
}

/* ===================================
   CUSTOM CHECKBOX INPUT
   =================================== */

.checkbox-wrapper input[type="checkbox"] {
    /* Hide default checkbox */
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    
    /* Custom checkbox size and position */
    width: 20px;
    height: 20px;
    min-width: 20px;
    margin: 0;
    cursor: pointer;
    position: relative;
    
    /* Custom checkbox design */
    background-color: white;
    border: 2px solid var(--color-gray-300);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.checkbox-wrapper input[type="checkbox"]:hover {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(30, 64, 175, 0.1);
}

.checkbox-wrapper input[type="checkbox"]:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(30, 64, 175, 0.15);
}

/* Checked state */
.checkbox-wrapper input[type="checkbox"]:checked {
    background-color: var(--color-primary);
    border-color: var(--color-primary);
}

/* Checkmark */
.checkbox-wrapper input[type="checkbox"]:checked::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) rotate(45deg);
    width: 5px;
    height: 10px;
    border: solid white;
    border-width: 0 2px 2px 0;
}

/* Disabled state */
.checkbox-wrapper input[type="checkbox"]:disabled {
    background-color: var(--color-gray-100);
    border-color: var(--color-gray-200);
    cursor: not-allowed;
    opacity: 0.6;
}

.checkbox-wrapper input[type="checkbox"]:disabled:checked {
    background-color: var(--color-gray-400);
    border-color: var(--color-gray-400);
}

/* ===================================
   CHECKBOX LABEL
   =================================== */

.checkbox-wrapper label {
    font-size: var(--font-size-sm);
    color: var(--color-gray-700);
    cursor: pointer;
    user-select: none;
    flex: 1;
    line-height: 1.5;
    margin: 0;
    font-weight: 400;
}

.checkbox-wrapper input[type="checkbox"]:checked + label {
    color: var(--color-gray-900);
    font-weight: 500;
}

.checkbox-wrapper input[type="checkbox"]:disabled + label {
    color: var(--color-gray-400);
    cursor: not-allowed;
}

.checkbox-wrapper label a {
    color: var(--color-primary);
    text-decoration: none;
}

.checkbox-wrapper label a:hover {
    text-decoration: underline;
}

/* ===================================
   CHECKBOX VARIATIONS
   =================================== */

/* Card Style - für wichtige Optionen */
.checkbox-wrapper.checkbox-card {
    background: white;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-4);
    margin-bottom: var(--spacing-3);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-fast);
}

.checkbox-wrapper.checkbox-card:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-md);
    background-color: white;
}

.checkbox-wrapper.checkbox-card input[type="checkbox"]:checked {
    background-color: var(--color-primary);
}

.checkbox-wrapper.checkbox-card:has(input[type="checkbox"]:checked) {
    border-color: var(--color-primary);
    background-color: rgba(30, 64, 175, 0.02);
}

/* Compact Style - für dichte Listen */
.checkbox-wrapper.checkbox-compact {
    padding: var(--spacing-2);
    margin-bottom: var(--spacing-1);
}

.checkbox-wrapper.checkbox-compact input[type="checkbox"] {
    width: 16px;
    height: 16px;
    min-width: 16px;
}

.checkbox-wrapper.checkbox-compact label {
    font-size: var(--font-size-xs);
}

/* ===================================
   GRID LAYOUTS
   =================================== */

.checkbox-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: var(--spacing-3);
}

.checkbox-grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-3);
}

.checkbox-grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-3);
}

.checkbox-grid-4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-3);
}

/* ===================================
   RESPONSIVE GRID
   =================================== */

@media (max-width: 1024px) {
    .checkbox-grid-4 {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    .checkbox-grid,
    .checkbox-grid-2,
    .checkbox-grid-3,
    .checkbox-grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .checkbox-wrapper {
        padding: var(--spacing-2);
    }
}

@media (max-width: 480px) {
    .checkbox-grid,
    .checkbox-grid-2,
    .checkbox-grid-3,
    .checkbox-grid-4 {
        grid-template-columns: 1fr;
    }
}

/* ===================================
   SECTION DIVIDERS
   =================================== */

.checkbox-section {
    margin-bottom: var(--spacing-6);
    padding-bottom: var(--spacing-6);
    border-bottom: 1px solid var(--color-border);
}

.checkbox-section:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.checkbox-section-title {
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--color-gray-800);
    margin-bottom: var(--spacing-4);
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
}

.checkbox-section-subtitle {
    font-size: var(--font-size-sm);
    color: var(--color-gray-600);
    margin-top: var(--spacing-1);
    margin-bottom: var(--spacing-3);
    font-weight: 400;
}

/* ===================================
   SPECIAL: BKF SECTION STYLING
   =================================== */

#bkf-section {
    background: linear-gradient(to right, rgba(30, 64, 175, 0.03), rgba(30, 64, 175, 0.01));
    border: 2px solid var(--color-primary);
    border-left-width: 4px;
    border-radius: var(--radius-lg);
    padding: var(--spacing-5);
    margin-top: var(--spacing-4);
    animation: slideDown 0.3s ease-out;
}

#bkf-section .form-group label:first-of-type {
    color: var(--color-primary);
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
}

#bkf-section .form-group label:first-of-type::before {
    content: '🚛';
    font-size: var(--font-size-lg);
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ===================================
   CONDITIONAL FIELDS ENHANCEMENT
   =================================== */

.conditional-field {
    background: var(--color-gray-50);
    border: 1px solid var(--color-border);
    border-left: 3px solid var(--color-primary);
    border-radius: var(--radius-md);
    padding: var(--spacing-4);
    margin-top: var(--spacing-4);
    animation: fadeIn 0.3s ease-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

/* ===================================
   RADIO BUTTONS (Bonus)
   =================================== */

.radio-wrapper {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    padding: var(--spacing-3);
    margin-bottom: var(--spacing-2);
    border-radius: var(--radius-md);
    transition: background-color var(--transition-fast);
    cursor: pointer;
}

.radio-wrapper:hover {
    background-color: rgba(30, 64, 175, 0.03);
}

.radio-wrapper input[type="radio"] {
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    
    width: 20px;
    height: 20px;
    min-width: 20px;
    margin: 0;
    cursor: pointer;
    position: relative;
    
    background-color: white;
    border: 2px solid var(--color-gray-300);
    border-radius: 50%;
    transition: all var(--transition-fast);
}

.radio-wrapper input[type="radio"]:hover {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(30, 64, 175, 0.1);
}

.radio-wrapper input[type="radio"]:checked {
    border-color: var(--color-primary);
}

.radio-wrapper input[type="radio"]:checked::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 10px;
    height: 10px;
    background-color: var(--color-primary);
    border-radius: 50%;
}

.radio-wrapper label {
    font-size: var(--font-size-sm);
    color: var(--color-gray-700);
    cursor: pointer;
    user-select: none;
    margin: 0;
}

.radio-wrapper input[type="radio"]:checked + label {
    color: var(--color-gray-900);
    font-weight: 500;
}

/* ===================================
   ACCESSIBILITY
   =================================== */

.checkbox-wrapper:focus-within,
.radio-wrapper:focus-within {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
    .checkbox-wrapper input[type="checkbox"],
    .radio-wrapper input[type="radio"] {
        border-width: 3px;
    }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    .checkbox-wrapper,
    .checkbox-wrapper input[type="checkbox"],
    .radio-wrapper,
    .radio-wrapper input[type="radio"],
    .conditional-field,
    #bkf-section {
        transition: none;
        animation: none;
    }
}

/* ===================================
   BACKWARDS COMPATIBILITY
   =================================== */

/* Alias für alte .checkbox-item Klasse */
.checkbox-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    padding: var(--spacing-3);
    margin-bottom: var(--spacing-2);
    border-radius: var(--radius-md);
    transition: background-color var(--transition-fast);
    cursor: pointer;
}

.checkbox-item:hover {
    background-color: rgba(30, 64, 175, 0.03);
}

.checkbox-item input[type="checkbox"] {
    /* Hide default checkbox */
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    
    /* Custom checkbox size and position */
    width: 20px;
    height: 20px;
    min-width: 20px;
    margin: 0;
    cursor: pointer;
    position: relative;
    
    /* Custom checkbox design */
    background-color: white;
    border: 2px solid var(--color-gray-300);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.checkbox-item input[type="checkbox"]:hover {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(30, 64, 175, 0.1);
}

.checkbox-item input[type="checkbox"]:checked {
    background-color: var(--color-primary);
    border-color: var(--color-primary);
}

.checkbox-item input[type="checkbox"]:checked::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) rotate(45deg);
    width: 5px;
    height: 10px;
    border: solid white;
    border-width: 0 2px 2px 0;
}

.checkbox-item label {
    font-size: var(--font-size-sm);
    color: var(--color-gray-700);
    cursor: pointer;
    user-select: none;
    margin: 0;
}