/**
 * Components - vetmed-wissensbilanz Dashboard
 *
 * Wiederverwendbare UI-Komponenten.
 */

/* ========================================
   BUTTONS
   ======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    font-family: inherit;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    line-height: 1;
    text-decoration: none;
    border: 1px solid transparent;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: all var(--transition-base);
    white-space: nowrap;
}

.btn:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

.btn--primary {
    background: var(--color-primary);
    color: white;
}

.btn--primary:hover {
    background: var(--color-primary-hover);
}

.btn--secondary {
    background: var(--color-bg);
    color: var(--color-text);
    border-color: var(--color-border);
}

.btn--secondary:hover {
    background: var(--color-bg-secondary);
}

.btn--ghost {
    background: transparent;
    color: var(--color-text-muted);
}

.btn--ghost:hover {
    background: var(--color-bg-secondary);
    color: var(--color-text);
}

.btn--sm {
    padding: var(--space-1) var(--space-3);
    font-size: var(--font-size-xs);
}

.btn--lg {
    padding: var(--space-3) var(--space-6);
    font-size: var(--font-size-base);
}

.btn--icon {
    padding: var(--space-2);
    width: 36px;
    height: 36px;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* ========================================
   FORM ELEMENTS
   ======================================== */
.form-group {
    margin-bottom: var(--space-4);
}

.form-label {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-text);
    margin-bottom: var(--space-2);
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: var(--space-2) var(--space-3);
    font-family: inherit;
    font-size: var(--font-size-sm);
    line-height: var(--line-height-base);
    color: var(--color-text);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-sm);
    transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.form-input:hover,
.form-select:hover,
.form-textarea:hover {
    border-color: var(--color-text-light);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-light);
}

.form-textarea {
    min-height: 100px;
    resize: vertical;
}

.form-select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%236c757d' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right var(--space-3) center;
    padding-right: var(--space-8);
}

/* ========================================
   CHECKBOX & RADIO (Universitäts-Auswahl)
   ======================================== */
.checkbox,
.radio {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    cursor: pointer;
    font-size: var(--font-size-sm);
}

.checkbox__input,
.radio__input {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.checkbox__box,
.radio__box {
    width: 18px;
    height: 18px;
    border: 2px solid var(--color-border);
    border-radius: var(--border-radius-sm);
    background: var(--color-bg);
    transition: all var(--transition-base);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.radio__box {
    border-radius: 50%;
}

.checkbox__input:checked + .checkbox__box {
    background: var(--color-primary);
    border-color: var(--color-primary);
}

.checkbox__input:checked + .checkbox__box::after {
    content: "";
    width: 5px;
    height: 9px;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg) translateY(-1px);
}

.radio__input:checked + .radio__box {
    border-color: var(--color-primary);
}

.radio__input:checked + .radio__box::after {
    content: "";
    width: 10px;
    height: 10px;
    background: var(--color-primary);
    border-radius: 50%;
}

.checkbox__input:focus-visible + .checkbox__box,
.radio__input:focus-visible + .radio__box {
    box-shadow: 0 0 0 3px var(--color-primary-light);
}

.checkbox__label,
.radio__label {
    color: var(--color-text);
}

/* Universität-Typ-spezifische Farben */
.checkbox--uni-voll .checkbox__input:checked + .checkbox__box {
    background: var(--color-uni-voll);
    border-color: var(--color-uni-voll);
}

.checkbox--uni-tech .checkbox__input:checked + .checkbox__box {
    background: var(--color-uni-tech);
    border-color: var(--color-uni-tech);
}

.checkbox--uni-med .checkbox__input:checked + .checkbox__box {
    background: var(--color-uni-med);
    border-color: var(--color-uni-med);
}

.checkbox--uni-kunst .checkbox__input:checked + .checkbox__box {
    background: var(--color-uni-kunst);
    border-color: var(--color-uni-kunst);
}

.checkbox--uni-weiterb .checkbox__input:checked + .checkbox__box {
    background: var(--color-uni-weiterb);
    border-color: var(--color-uni-weiterb);
}

/* ========================================
   RANGE SLIDER (Zeitraum)
   ======================================== */
.range-slider {
    width: 100%;
}

.range-slider__track {
    position: relative;
    height: 6px;
    background: var(--color-bg-tertiary);
    border-radius: var(--border-radius-full);
    margin: var(--space-4) 0;
}

.range-slider__range {
    position: absolute;
    height: 100%;
    background: var(--color-primary);
    border-radius: var(--border-radius-full);
}

.range-slider__thumb {
    position: absolute;
    width: 18px;
    height: 18px;
    background: var(--color-bg);
    border: 2px solid var(--color-primary);
    border-radius: 50%;
    cursor: grab;
    transform: translateX(-50%) translateY(-6px);
    transition: box-shadow var(--transition-base);
}

.range-slider__thumb:hover {
    box-shadow: 0 0 0 4px var(--color-primary-light);
}

.range-slider__thumb:active {
    cursor: grabbing;
}

.range-slider__labels {
    display: flex;
    justify-content: space-between;
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
}

.range-slider__value {
    text-align: center;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text);
    margin-top: var(--space-2);
}

/* ========================================
   BADGES & CHIPS
   ======================================== */
.badge {
    display: inline-flex;
    align-items: center;
    padding: var(--space-1) var(--space-2);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
    border-radius: var(--border-radius-full);
    white-space: nowrap;
}

.badge--primary {
    background: var(--color-primary-light);
    color: var(--color-primary);
}

.badge--success {
    background: #d4edda;
    color: var(--color-success);
}

.badge--warning {
    background: #fff3cd;
    color: #856404;
}

.badge--danger {
    background: #f8d7da;
    color: var(--color-danger);
}

.badge--muted {
    background: var(--color-bg-tertiary);
    color: var(--color-text-muted);
}

/* Chip (removable badge) */
.chip {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    padding: var(--space-1) var(--space-2);
    padding-right: var(--space-1);
    font-size: var(--font-size-xs);
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-full);
}

.chip__remove {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 16px;
    height: 16px;
    background: none;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    color: var(--color-text-muted);
    transition: all var(--transition-base);
}

.chip__remove:hover {
    background: var(--color-bg-tertiary);
    color: var(--color-text);
}

/* ========================================
   LOADING STATES
   ======================================== */
.skeleton {
    background: linear-gradient(
        90deg,
        var(--color-bg-tertiary) 25%,
        var(--color-bg-secondary) 50%,
        var(--color-bg-tertiary) 75%
    );
    background-size: 200% 100%;
    animation: skeleton-pulse 1.5s ease-in-out infinite;
    border-radius: var(--border-radius-sm);
}

@keyframes skeleton-pulse {
    0% {
        background-position: 200% 0;
    }
    100% {
        background-position: -200% 0;
    }
}

.skeleton--text {
    height: 1em;
    margin-bottom: var(--space-2);
}

.skeleton--title {
    height: 1.5em;
    width: 60%;
    margin-bottom: var(--space-4);
}

.skeleton--chart {
    height: 300px;
}

.spinner {
    width: 24px;
    height: 24px;
    border: 3px solid var(--color-bg-tertiary);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* ========================================
   TOOLTIPS
   ======================================== */
.tooltip {
    position: relative;
}

.tooltip__content {
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(-8px);
    padding: var(--space-2) var(--space-3);
    font-size: var(--font-size-xs);
    color: white;
    background: var(--color-text);
    border-radius: var(--border-radius-sm);
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
    z-index: var(--z-tooltip);
}

.tooltip__content::after {
    content: "";
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 6px solid transparent;
    border-top-color: var(--color-text);
}

.tooltip:hover .tooltip__content {
    opacity: 1;
    visibility: visible;
}

/* ========================================
   ALERTS / MESSAGES
   ======================================== */
.alert {
    display: flex;
    gap: var(--space-3);
    padding: var(--space-4);
    border-radius: var(--border-radius);
    font-size: var(--font-size-sm);
}

.alert--info {
    background: #e7f3ff;
    border-left: 4px solid var(--color-info);
    color: #0c5460;
}

.alert--success {
    background: #d4edda;
    border-left: 4px solid var(--color-success);
    color: #155724;
}

.alert--warning {
    background: #fff3cd;
    border-left: 4px solid var(--color-warning);
    color: #856404;
}

.alert--danger {
    background: #f8d7da;
    border-left: 4px solid var(--color-danger);
    color: #721c24;
}

.alert__icon {
    flex-shrink: 0;
    width: 20px;
    height: 20px;
}

.alert__content {
    flex: 1;
}

.alert__title {
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--space-1);
}

/* ========================================
   DROPDOWN
   ======================================== */
.dropdown {
    position: relative;
    display: inline-block;
}

.dropdown__menu {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 200px;
    margin-top: var(--space-1);
    padding: var(--space-2) 0;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: all var(--transition-base);
    z-index: var(--z-dropdown);
}

.dropdown.is-open .dropdown__menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown__item {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    width: 100%;
    padding: var(--space-2) var(--space-4);
    font-size: var(--font-size-sm);
    color: var(--color-text);
    background: none;
    border: none;
    text-align: left;
    cursor: pointer;
    transition: background var(--transition-fast);
}

.dropdown__item:hover {
    background: var(--color-bg-secondary);
}

.dropdown__divider {
    height: 1px;
    margin: var(--space-2) 0;
    background: var(--color-border-light);
}

/* ========================================
   EMPTY STATES
   ======================================== */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-12);
    text-align: center;
}

.empty-state__icon {
    width: 64px;
    height: 64px;
    margin-bottom: var(--space-4);
    color: var(--color-text-light);
}

.empty-state__title {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--space-2);
}

.empty-state__description {
    color: var(--color-text-muted);
    max-width: 300px;
}

.empty-state--error .empty-state__icon {
    color: var(--color-danger);
}

.empty-state--error .empty-state__title {
    color: var(--color-danger);
}

/* ========================================
   SUCCESS STATE (für Share Button etc.)
   ======================================== */
.btn--success {
    background: var(--color-success);
    color: white;
    border-color: var(--color-success);
}

.btn--success:hover {
    background: #218838;
}

/* ========================================
   ACCORDION (für Uni-Filter)
   ======================================== */
.accordion-item {
    border-bottom: 1px solid var(--color-border-light);
}

.accordion-item:last-child {
    border-bottom: none;
}

.accordion-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-2) 0;
    gap: var(--space-2);
}

.accordion-header .checkbox {
    flex: 1;
}

.accordion-toggle {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-1) var(--space-2);
    background: transparent;
    border: none;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    color: var(--color-text-muted);
    font-size: var(--font-size-xs);
    transition: all var(--transition-base);
}

.accordion-toggle:hover {
    background: var(--color-bg-secondary);
    color: var(--color-text);
}

.accordion-count {
    min-width: 30px;
    text-align: right;
}

.accordion-icon {
    transition: transform var(--transition-base);
}

.accordion-item--expanded .accordion-icon {
    transform: rotate(180deg);
}

.accordion-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.25s ease-out;
    padding-left: var(--space-4);
}

.accordion-content .checkbox {
    padding: var(--space-1) 0;
}

/* ========================================
   DATA TABLE
   ======================================== */
.table-container {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.table-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-3);
}

.table-info {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

.table-actions {
    display: flex;
    gap: var(--space-2);
    align-items: center;
}

.table-wrapper {
    overflow-x: auto;
    border: 1px solid var(--color-border-light);
    border-radius: var(--border-radius);
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: var(--font-size-sm);
}

.data-table th,
.data-table td {
    padding: var(--space-2) var(--space-3);
    text-align: left;
    border-bottom: 1px solid var(--color-border-light);
}

.data-table th {
    background: var(--color-bg-secondary);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text);
    white-space: nowrap;
}

.data-table th.sortable {
    cursor: pointer;
    user-select: none;
}

.data-table th.sortable:hover {
    background: var(--color-bg-tertiary);
}

.data-table th .sort-icon::after {
    content: "↕";
    margin-left: var(--space-1);
    opacity: 0.3;
    font-size: var(--font-size-xs);
}

.data-table th.sort-asc .sort-icon::after {
    content: "↑";
    opacity: 1;
}

.data-table th.sort-desc .sort-icon::after {
    content: "↓";
    opacity: 1;
}

.data-table tbody tr:hover {
    background: var(--color-bg-secondary);
}

.data-table tbody tr:last-child td {
    border-bottom: none;
}

/* Uni-Badge in Tabelle */
.uni-badge {
    display: inline-flex;
    align-items: center;
    padding: var(--space-1) var(--space-2);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
    color: var(--uni-color, var(--color-text));
    background: color-mix(in srgb, var(--uni-color, var(--color-text)) 10%, transparent);
    border-radius: var(--border-radius-sm);
}

/* Null-Value Styling */
.value-no-data,
.value-not-applicable {
    color: var(--color-text-muted);
    font-style: italic;
}

.value-invalid {
    color: var(--color-danger);
    font-weight: var(--font-weight-semibold);
}

/* Sparkline-Zelle */
.sparkline-cell {
    padding: var(--space-1) var(--space-2) !important;
    width: 140px;
    min-width: 140px;
}

.sparkline {
    display: block;
}

/* Pagination */
.table-pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--space-1);
    padding-top: var(--space-3);
}

.pagination-ellipsis {
    padding: 0 var(--space-2);
    color: var(--color-text-muted);
}