/* ================================================================
   STAHLBLAU - SHARED COMPONENT PATTERNS
   Reusable UI building blocks shared across pages.
   Class naming: syn-{block}-{element}, syn-{block}--{variant}
   ================================================================ */

/* ----------------------------------------------------------------
   SYN-PANEL
   Container for a logical group of content. Two variants:
     --open   Borderless/typographic - for detail/settings forms
     --data   Navy header - for row-based data lists (matches nav)
   No overflow:hidden so TypeAhead dropdowns render freely.
   ---------------------------------------------------------------- */
.syn-panel {
    background: var(--surface-color);
    border: 1.5px solid var(--border-color);
    border-radius: var(--radius-base);
}

.syn-panel-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.625rem 1.125rem;
    border-bottom: 1px solid var(--border-color);
    background: var(--surface-muted);
    border-radius: calc(var(--radius-base) - 1.5px) calc(var(--radius-base) - 1.5px) 0 0;
}

.syn-panel-icon {
    color: var(--text-muted);
    font-size: 0.9rem;
    display: flex;
    align-items: center;
}

.syn-panel-title {
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.07em;
    color: var(--label-color);
    flex: 1;
}

.syn-panel-badge {
    font-size: 0.7rem;
    color: var(--text-muted);
    background: var(--light-bg);
    border: 1px solid var(--border-color);
    border-radius: 999px;
    padding: 0.1rem 0.625rem;
    font-weight: 600;
}

.syn-panel-body {
    padding: 1.25rem;
}

.syn-panel-body--flush {
    padding: 0;
}

.syn-panel-footer {
    padding: 0.875rem 1.25rem;
    border-top: 1px solid var(--border-color);
    background: var(--surface-muted);
    border-radius: 0 0 calc(var(--radius-base) - 1.5px) calc(var(--radius-base) - 1.5px);
}

.syn-panel-text {
    margin: 0 0 1rem;
    font-size: 0.875rem;
    line-height: 1.5;
}

/* Variant: Open - soft card with a typographic heading that leads directly into
   the form (no header separator, no muted header band). Used for detail/settings
   sections where the content is inputs rather than row-based data. */
.syn-panel--open .syn-panel-header {
    background: transparent;
    border-bottom: none;
    padding: 1rem 1.25rem 0.5rem;
    border-radius: calc(var(--radius-base) - 1.5px) calc(var(--radius-base) - 1.5px) 0 0;
}

.syn-panel--open .syn-panel-icon {
    color: var(--primary-color);
    font-size: 1rem;
}

.syn-panel--open .syn-panel-title {
    font-family: 'Outfit', 'DM Sans', sans-serif;
    font-size: 0.95rem;
    font-weight: 700;
    text-transform: none;
    letter-spacing: 0;
    color: var(--heading-color);
}

/* Variant: Data - navy header, ties list identity to the navbar */
.syn-panel--data .syn-panel-header {
    background: var(--nav-bg);
    border-bottom: none;
    border-radius: calc(var(--radius-base) - 1.5px) calc(var(--radius-base) - 1.5px) 0 0;
}

.syn-panel--data .syn-panel-title {
    color: var(--nav-text);
    text-transform: uppercase;
    letter-spacing: 0.07em;
}

.syn-panel--data .syn-panel-icon {
    color: var(--nav-text);
}

.syn-panel--data .syn-panel-badge {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.15);
    color: var(--nav-text);
}

/* ----------------------------------------------------------------
   SYN-ROW
   Collapsible data row, used inside syn-panel--data.
   Index circle flips to primary blue when expanded.
   3px left accent animates in on expand.
   ---------------------------------------------------------------- */
.syn-row {
    border-bottom: 1px solid var(--border-hover);
    background: var(--surface-color);
    position: relative;
    transition: background-color 0.12s ease;
}

.syn-row:last-of-type {
    border-bottom: none;
}

.syn-row::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--primary-color);
    opacity: 0;
    transition: opacity 0.14s ease;
}

.syn-row--expanded::before {
    opacity: 1;
}

.syn-row-header {
    display: flex;
    align-items: center;
    padding: 0.875rem 1.125rem;
    cursor: pointer;
    gap: 0.75rem;
    transition: background-color 0.12s ease;
}

.syn-row-header:hover {
    background: rgba(var(--primary-color-rgb), 0.03);
}

.syn-row--expanded .syn-row-header {
    background: rgba(var(--primary-color-rgb), 0.04);
    border-bottom: 1px solid var(--border-color);
}

.syn-row-index {
    width: 1.625rem;
    height: 1.625rem;
    border-radius: 50%;
    background: var(--light-bg);
    border: 1.5px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.68rem;
    font-weight: 700;
    color: var(--text-muted);
    flex-shrink: 0;
    transition: background-color 0.14s ease, border-color 0.14s ease, color 0.14s ease;
}

.syn-row--expanded .syn-row-index {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: var(--white-color);
}

.syn-row-name {
    flex: 1;
    min-width: 0;
}

.syn-row-primary {
    display: block;
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--heading-color);
    line-height: 1.2;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.syn-row-secondary {
    display: block;
    font-size: 0.7rem;
    color: var(--text-muted);
    margin-top: 0.1rem;
}

.syn-row-amount {
    font-weight: 700;
    font-size: 0.875rem;
    font-variant-numeric: tabular-nums;
    color: var(--text-color);
    white-space: nowrap;
    flex-shrink: 0;
}

.syn-row-comment {
    color: var(--text-muted);
    font-size: 0.85rem;
    flex-shrink: 0;
    display: flex;
    align-items: center;
}

.syn-row-expand {
    color: var(--text-muted);
    font-size: 1rem;
    flex-shrink: 0;
}

.syn-row-actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-shrink: 0;
}

.syn-row-body {
    padding: 1.25rem;
    background: var(--surface-muted);
    border-top: 1px solid var(--border-color);
}

.syn-row-add {
    padding: 0.75rem 1.125rem;
    border-top: 1px dashed var(--border-color);
    background: var(--surface-muted);
    border-radius: 0 0 calc(var(--radius-base) - 1.5px) calc(var(--radius-base) - 1.5px);
}

/* Tertiary additive button - plain text + icon, no border or fill.
   Used inside syn-row-add zones. Quiet so it doesn't compete with syn-action-btn. */
.syn-row-add-btn {
    background: none;
    border: none;
    padding: 0;
    color: var(--primary-color);
    font-size: 0.875rem;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    cursor: pointer;
    transition: color 0.14s ease;
}

.syn-row-add-btn:hover {
    color: var(--primary-hover);
}

.syn-row-add-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
    pointer-events: none;
}

/* ----------------------------------------------------------------
   SYN-BTN
   Stahlblau-native button variants. Always pair with .btn for base
   behavior (sizing, cursor, display). Migration: use these on
   redesigned pages; Bootstrap semantic btn-* variants remain for older
   pages until their turn comes.
   ---------------------------------------------------------------- */

/* Neutral - soft muted surface, no semantic color. Opt-in only;
   there is no fallback that applies this automatically. */
.syn-btn-neutral {
    background-color: var(--surface-muted);
    border-color: var(--border-color);
    color: var(--text-color);
}

.syn-btn-neutral:hover {
    background-color: var(--light-bg);
    border-color: var(--border-hover);
    color: var(--text-color);
}

/* Primary - enter workflows, open screens, create flows, add items.
   Softer than confirm — signals intent without implying finality. */
.syn-btn-primary {
    background-color: var(--primary-light);
    border-color: rgba(var(--primary-color-rgb), 0.35);
    color: var(--primary-color);
    font-weight: 600;
}

.syn-btn-primary:hover {
    background-color: rgba(var(--primary-color-rgb), 0.12);
    border-color: var(--primary-color);
    color: var(--primary-hover);
    box-shadow: 0 1px 3px rgba(var(--primary-color-rgb), 0.18);
}

/* Confirm / Success - commit, save, send, complete on light surfaces.
   Solid fill signals finality; use sparingly. */
.syn-btn-confirm,
.syn-btn-success {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: var(--white-color);
    font-weight: 600;
}

.syn-btn-confirm:hover,
.syn-btn-success:hover {
    background-color: var(--primary-hover);
    border-color: var(--primary-hover);
    color: var(--white-color);
    box-shadow: 0 1px 3px rgba(var(--primary-color-rgb), 0.25);
}

.syn-btn-primary:disabled,
.syn-btn-primary.disabled,
.syn-btn-confirm:disabled,
.syn-btn-confirm.disabled,
.syn-btn-success:disabled,
.syn-btn-success.disabled,
.syn-btn-warning:disabled,
.syn-btn-warning.disabled,
.syn-btn-outline-primary:disabled,
.syn-btn-outline-primary.disabled,
.syn-btn-outline-success:disabled,
.syn-btn-outline-success.disabled,
.syn-btn-outline-danger:disabled,
.syn-btn-outline-danger.disabled {
    opacity: 0.5;
    pointer-events: none;
}

.syn-btn-warning {
    background-color: var(--warning-color);
    border-color: var(--warning-color);
    color: var(--heading-color);
    font-weight: 600;
}

.syn-btn-warning:hover {
    background-color: var(--warning-hover);
    border-color: var(--warning-hover);
    color: var(--heading-color);
    box-shadow: 0 1px 3px rgba(var(--warning-color-rgb), 0.25);
}

.syn-btn-info {
    background-color: var(--info-color);
    border-color: var(--info-color);
    color: var(--white-color);
    font-weight: 600;
}

.syn-btn-info:hover {
    background-color: var(--info-hover);
    border-color: var(--info-hover);
    color: var(--white-color);
    box-shadow: 0 1px 3px rgba(var(--info-color-rgb), 0.25);
}

.syn-btn-outline-primary {
    background-color: transparent;
    border-color: rgba(var(--primary-color-rgb), 0.35);
    color: var(--primary-color);
}

.syn-btn-outline-primary:hover {
    background-color: rgba(var(--primary-color-rgb), 0.06);
    border-color: var(--primary-color);
    color: var(--primary-hover);
}

.syn-btn-outline-success {
    background-color: transparent;
    border-color: rgba(var(--success-color-rgb), 0.35);
    color: var(--success-color);
}

.syn-btn-outline-success:hover {
    background-color: rgba(var(--success-color-rgb), 0.06);
    border-color: var(--success-color);
    color: var(--success-hover);
}

.syn-btn-outline-warning {
    background-color: transparent;
    border-color: rgba(var(--warning-color-rgb), 0.35);
    color: var(--warning-color);
}

.syn-btn-outline-warning:hover {
    background-color: rgba(var(--warning-color-rgb), 0.06);
    border-color: var(--warning-color);
    color: var(--warning-hover);
}

.syn-btn-outline-info {
    background-color: transparent;
    border-color: rgba(var(--info-color-rgb), 0.35);
    color: var(--info-color);
}

.syn-btn-outline-info:hover {
    background-color: rgba(var(--info-color-rgb), 0.06);
    border-color: var(--info-color);
    color: var(--info-hover);
}

.syn-btn-outline-danger {
    background-color: transparent;
    border-color: rgba(var(--danger-color-rgb), 0.35);
    color: var(--danger-color);
}

.syn-btn-outline-danger:hover {
    background-color: rgba(var(--danger-color-rgb), 0.06);
    border-color: var(--danger-color);
    color: var(--danger-hover);
}

.syn-btn-link {
    background: transparent;
    border-color: transparent;
    color: var(--primary-color);
    padding-left: 0;
    padding-right: 0;
}

.syn-btn-link:hover {
    color: var(--primary-hover);
    text-decoration: underline;
}

.syn-btn-group {
    display: inline-flex;
    vertical-align: middle;
}

.syn-btn-group > .btn:not(:first-child) {
    margin-left: -1.5px;
    border-top-left-radius: 0;
    border-bottom-left-radius: 0;
}

.syn-btn-group > .btn:not(:last-child) {
    border-top-right-radius: 0;
    border-bottom-right-radius: 0;
}

.syn-btn-group--sm > .btn {
    padding: 0.25rem 0.5rem;
    font-size: 0.8125rem;
    line-height: 1.5;
}

/* Cancel - dismiss, close, go back. Recedes intentionally so it never
   competes with the primary action. Lighter border than btn-outline-secondary;
   fills subtly on hover rather than going solid. */
.syn-btn-cancel {
    background-color: transparent;
    border-color: var(--border-color);
    color: var(--text-muted);
}

.syn-btn-cancel:hover {
    background-color: var(--surface-muted);
    border-color: var(--border-hover);
    color: var(--text-color);
}

.syn-btn-cancel:disabled,
.syn-btn-cancel.disabled {
    opacity: 0.5;
    pointer-events: none;
}

/* Danger - destructive confirmations (delete, remove). Solid red;
   the weight signals irreversibility. */
.syn-btn-danger {
    background-color: var(--danger-color);
    border-color: var(--danger-color);
    color: var(--white-color);
}

.syn-btn-danger:hover {
    background-color: var(--danger-hover);
    border-color: var(--danger-hover);
    color: var(--white-color);
    box-shadow: 0 1px 3px rgba(var(--danger-color-rgb), 0.3);
}

.syn-btn-danger:disabled,
.syn-btn-danger.disabled {
    opacity: 0.5;
    pointer-events: none;
}

/* ----------------------------------------------------------------
   SYN-ACTION-BAR
   Sticky dark footer for form submission. Matches nav-bg so it
   feels like the navbar anchoring the bottom of the page.
   ---------------------------------------------------------------- */
.syn-action-bar {
    position: sticky;
    bottom: 1rem;
    background: var(--nav-bg);
    border-radius: var(--radius-base);
    padding: 0.875rem 1.25rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: 0 4px 24px rgba(var(--nav-shadow-rgb), 0.4);
    margin-top: 1rem;
    z-index: 10;
}

.syn-action-bar-summary {
    color: var(--nav-text);
    font-size: 0.875rem;
}

.syn-action-bar-actions {
    display: flex;
    align-items: center;
    gap: 0.625rem;
}

/* Primary on-dark button for the action bar.
   --primary-light bg against navy, navy text. Transparent border at rest prevents
   a 1px layout shift when the primary-color stroke appears on hover. */
.syn-action-btn {
    background: var(--primary-light);
    color: var(--nav-bg);
    border: 1px solid transparent;
    font-weight: 600;
    transition: background-color 0.14s ease, border-color 0.14s ease;
}

.syn-action-btn:hover,
.syn-action-btn:focus {
    background: color-mix(in srgb, var(--primary-light) 86%, var(--primary-color));
    color: var(--nav-bg);
    border-color: var(--primary-color);
}

.syn-action-btn:active {
    background: color-mix(in srgb, var(--primary-light) 72%, var(--primary-color));
    color: var(--nav-bg);
    border-color: var(--primary-color);
}

.syn-action-btn:disabled,
.syn-action-btn.disabled {
    opacity: 0.5;
    pointer-events: none;
}

/* ----------------------------------------------------------------
   SYN-TABLE-ACTION
   Icon-only action buttons inside table rows.
   --danger variant for destructive actions.
   ---------------------------------------------------------------- */
.syn-table-action {
    background: transparent;
    color: var(--text-muted);
    border: 1px solid transparent;
    padding: 0.2rem 0.4rem;
    line-height: 1;
    transition: background-color 0.12s ease, color 0.12s ease, border-color 0.12s ease;
}

.syn-table-action:hover,
.syn-table-action:focus {
    background: var(--surface-muted);
    color: var(--text-color);
    border-color: var(--border-color);
}

.syn-table-action--danger {
    color: var(--danger-color, #c0392b);
}

.syn-table-action--danger:hover,
.syn-table-action--danger:focus {
    background: rgba(var(--danger-color-rgb, 192, 57, 43), 0.08);
    color: var(--danger-color, #c0392b);
    border-color: rgba(var(--danger-color-rgb, 192, 57, 43), 0.25);
}

.syn-table-action:disabled {
    opacity: 0.35;
    pointer-events: none;
}

/* ----------------------------------------------------------------
   SYN-EMPTY
   Empty state for zero-data contexts. Three variants per ui-conventions:
     default    - icon + title + description (± CTA): panels, full sections
     --compact  - title only, minimal padding: log sublists, inline tables
   ---------------------------------------------------------------- */
.syn-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 3rem 1.5rem;
    text-align: center;
}

.syn-empty--compact {
    padding: 0.75rem 1rem;
    align-items: flex-start;
    text-align: left;
}

.syn-empty-icon {
    width: 52px;
    height: 52px;
    border-radius: 50%;
    background: var(--surface-muted);
    border: 1.5px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
    color: var(--text-muted);
    font-size: 1.25rem;
    flex-shrink: 0;
}

.syn-empty-title {
    font-family: 'Outfit', sans-serif;
    font-weight: 600;
    font-size: 0.9375rem;
    color: var(--heading-color);
    margin: 0 0 0.375rem;
}

.syn-empty--compact .syn-empty-title {
    font-size: 0.8125rem;
    color: var(--text-muted);
    font-family: inherit;
    font-weight: 500;
    margin: 0;
}

.syn-empty-description {
    font-size: 0.875rem;
    color: var(--text-muted);
    max-width: 300px;
    margin: 0;
    line-height: 1.55;
}

.syn-empty-cta {
    margin-top: 1.25rem;
}

/* ----------------------------------------------------------------
   SYN-LABEL / SYN-INPUT / SYN-SELECT
   Stahlblau-native form element classes. Use on redesigned pages;
   old pages keep form-control (globally overridden in site.css)
   until their turn comes.
   ---------------------------------------------------------------- */

.syn-label {
    display: inline-block;
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--label-color);
    margin-bottom: 0.375rem;
}

.syn-input,
.syn-select {
    display: block;
    width: 100%;
    padding: 0.5rem 0.75rem;
    font-size: 0.875rem;
    line-height: 1.5;
    color: var(--text-color);
    background-color: var(--surface-color);
    border: 1.5px solid var(--border-color);
    border-radius: var(--radius-base);
    transition: border-color 0.14s ease, box-shadow 0.14s ease;
    appearance: none;
}

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

.syn-input[readonly] {
    background-color: var(--light-bg);
    color: var(--text-muted);
    border-color: var(--border-color);
    cursor: default;
}

.syn-input:disabled,
.syn-select:disabled {
    background-color: var(--light-bg);
    color: var(--text-muted);
    border-color: var(--border-color);
    cursor: not-allowed;
    opacity: 1;
}

/* Validation - Blazor appends "invalid" / "valid modified" to the element */
.syn-input.invalid,
.syn-select.invalid {
    border-color: var(--danger-color) !important;
}

.syn-input.invalid:focus,
.syn-select.invalid:focus {
    border-color: var(--danger-color) !important;
    box-shadow: 0 0 0 3px rgba(var(--danger-color-rgb), 0.18);
}

.syn-input.valid.modified,
.syn-select.valid.modified {
    border-color: var(--success-color) !important;
}

.syn-input.valid.modified:focus,
.syn-select.valid.modified:focus {
    box-shadow: 0 0 0 3px rgba(var(--success-color-rgb), 0.18);
}

/* Custom chevron arrow for selects */
.syn-select {
    padding-right: 2.25rem;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3e%3cpath fill='none' stroke='%23475569' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M2 5l6 6 6-6'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    background-size: 16px 12px;
}

/* Size variant - for prominent hero inputs (e.g. order number) */
.syn-input--lg {
    padding: 0.625rem 0.875rem;
    font-size: 1rem;
}

.syn-plaintext {
    display: block;
    width: 100%;
    min-height: calc(1.5em + 1rem + 3px);
    padding: 0.5rem 0;
    font-size: 0.875rem;
    line-height: 1.5;
    color: var(--text-color);
}

/* input-group integration - Bootstrap's input-group targets .form-control
   specifically; replicate the flex behaviour for syn-input/syn-select */
.input-group > .syn-input,
.input-group > .syn-select {
    position: relative;
    flex: 1 1 auto;
    width: 1%;
    min-width: 0;
    margin-bottom: 0;
}

.input-group > .syn-input:not(:last-child),
.input-group > .syn-select:not(:last-child) {
    border-top-right-radius: 0;
    border-bottom-right-radius: 0;
    border-right: none;
}

.input-group > .syn-input:not(:last-child):focus,
.input-group > .syn-select:not(:last-child):focus {
    border-right: 1.5px solid var(--primary-color);
}

/* Carry invalid state through to the appended suffix element */
.input-group > .syn-input.invalid:not(:last-child),
.input-group > .syn-select.invalid:not(:last-child) {
    border-right: 1.5px solid var(--danger-color) !important;
}

.input-group > .syn-input.invalid + .input-group-text,
.input-group > .syn-select.invalid + .input-group-text {
    border-color: var(--danger-color) !important;
}

.input-group > .syn-input:not(:first-child),
.input-group > .syn-select:not(:first-child) {
    border-top-left-radius: 0;
    border-bottom-left-radius: 0;
}

@media (max-width: 576px) {
    .syn-action-bar {
        flex-direction: column;
        gap: 0.75rem;
        align-items: stretch;
        text-align: center;
    }

    .syn-action-bar-actions {
        justify-content: center;
    }
}

/* ─── syn-tag ───────────────────────────────────────────────────────────── */

.syn-tag {
    display: inline-flex;
    align-items: center;
    padding: 0.1rem 0.4rem;
    border-radius: 999px;
    background-color: oklch(from var(--tag-color, var(--secondary-color)) 94% 0.04 h);
    color:            oklch(from var(--tag-color, var(--secondary-color)) 32% 0.15 h);
    border: 1px solid oklch(from var(--tag-color, var(--secondary-color)) 78% 0.08 h);
    font-size: 0.7rem;
    font-weight: 500;
    line-height: 1.5;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 100%;
}

/* ─── syn-badge ─────────────────────────────────────────────────────────── */

.syn-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.15rem 0.5rem;
    border-radius: 5px;
    background: var(--surface-color);
    font-size: 0.74rem;
    font-weight: 600;
    line-height: 1.4;
    border: 1.5px solid transparent;
}

.syn-badge--info {
    border-color: rgba(var(--primary-color-rgb), 0.3);
    color: var(--primary-color);
}

.syn-badge--warn {
    border-color: rgba(var(--warning-color-rgb), 0.35);
    color: var(--warning-color);
}

.syn-badge--success {
    border-color: rgba(var(--success-color-rgb), 0.35);
    color: var(--success-color);
}

.syn-badge--danger {
    border-color: rgba(var(--danger-color-rgb), 0.35);
    color: var(--danger-color);
}

.syn-badge--muted {
    border-color: var(--border-color);
    color: var(--text-muted);
    background: var(--light-bg);
}

/* ─── syn-row-price ──────────────────────────────────────────────────────── */

.syn-row-price {
    font-size: 0.82rem;
    font-variant-numeric: tabular-nums;
    color: var(--text-muted);
    white-space: nowrap;
}

/* ─── syn-list ──────────────────────────────────────────────────────────── */

.syn-list {
    display: flex;
    flex-direction: column;
    background: var(--surface-color);
    border: 1.5px solid var(--border-color);
    border-radius: var(--radius-base);
    box-shadow: 0 8px 24px rgba(var(--nav-shadow-rgb), 0.12);
    overflow: hidden;
}

.syn-list-item {
    display: block;
    width: 100%;
    padding: 0.625rem 0.875rem;
    color: var(--text-color);
    text-align: left;
    background: var(--surface-color);
    border: 0;
    border-bottom: 1px solid var(--border-color);
    cursor: pointer;
}

.syn-list-item:last-child {
    border-bottom: 0;
}

.syn-list-item:hover {
    background: var(--surface-muted);
    color: var(--heading-color);
}

/* ─── syn-tabs ──────────────────────────────────────────────────────────── */

.syn-tabs {
    display: flex;
    align-items: center;
    gap: 0.375rem;
    border-bottom: 1.5px solid var(--border-color);
    overflow-x: auto;
}

.syn-tab {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.625rem 0.875rem;
    margin-bottom: -1.5px;
    border: 1.5px solid transparent;
    border-radius: var(--radius-sm) var(--radius-sm) 0 0;
    background: transparent;
    color: var(--text-muted);
    font-size: 0.9rem;
    font-weight: 500;
    white-space: nowrap;
    cursor: pointer;
}

.syn-tab:hover {
    color: var(--primary-color);
    background: rgba(var(--primary-color-rgb), 0.04);
}

.syn-tab.active {
    color: var(--primary-color);
    background: var(--surface-color);
    border-color: var(--border-color) var(--border-color) var(--surface-color);
    font-weight: 600;
}

.syn-tab-content {
    margin-top: 1rem;
}

/* ─── syn-section-rule ───────────────────────────────────────────────────── */

.syn-section-rule {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin: 0.25rem 0 0.75rem;
}

.syn-section-rule::before,
.syn-section-rule::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--border-color);
}

.syn-section-rule-label {
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.07em;
    color: var(--label-color);
    white-space: nowrap;
}

/* ─── syn-check ──────────────────────────────────────────────────────────── */

.syn-check,
.modal-content-body label.syn-check {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
    user-select: none;
    color: var(--text-color);
}

.syn-check:has(.syn-check-help),
.modal-content-body label.syn-check:has(.syn-check-help) {
    align-items: flex-start;
}

.syn-check input[type="checkbox"] {
    appearance: none;
    -webkit-appearance: none;
    width: 18px !important;
    height: 18px !important;
    min-width: 18px;
    min-height: 0 !important;
    border: 1.5px solid var(--border-color) !important;
    border-radius: 4px !important;
    background: var(--surface-color) !important;
    background-image: none !important;
    cursor: pointer;
    margin: 0 !important;
    flex-shrink: 0;
    transition: border-color 0.14s ease, background-color 0.14s ease;
}

.syn-check:has(.syn-check-help) input[type="checkbox"] {
    margin-top: 2px !important;
}

.syn-check input[type="checkbox"]:checked {
    background-color: var(--primary-color) !important;
    border-color: var(--primary-color) !important;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 12'%3E%3Cpath fill='none' stroke='white' stroke-width='2' stroke-linecap='round' stroke-linejoin='round' d='M2 6l3 3 5-5'/%3E%3C/svg%3E") !important;
    background-repeat: no-repeat !important;
    background-position: center !important;
    background-size: 11px 11px !important;
}

.syn-check input[type="checkbox"]:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.syn-check-label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-color);
    line-height: 1.4;
}

.syn-check:not(:has(.syn-check-help)) .syn-check-label {
    display: inline-flex;
    align-items: center;
    min-height: 18px;
    line-height: 1.25;
}

.syn-check-help {
    display: block;
    font-size: 0.78rem;
    color: var(--text-muted);
    margin-top: 0.15rem;
}

/* ─── syn-radio ──────────────────────────────────────────────────────────── */

.syn-radio,
.modal-content-body label.syn-radio {
    display: inline-flex;
    align-items: flex-start;
    gap: 0.625rem;
    cursor: pointer;
    user-select: none;
    color: var(--text-color);
}

.syn-radio input[type="radio"] {
    appearance: none;
    -webkit-appearance: none;
    width: 18px !important;
    height: 18px !important;
    min-width: 18px;
    min-height: 0 !important;
    border: 1.5px solid var(--border-color) !important;
    border-radius: 50% !important;
    background: var(--surface-color) !important;
    background-image: none !important;
    cursor: pointer;
    margin-top: 2px;
    flex-shrink: 0;
    transition: border-color 0.14s ease, box-shadow 0.14s ease;
}

.syn-radio input[type="radio"]:checked {
    border-color: var(--primary-color) !important;
    box-shadow: inset 0 0 0 4px var(--surface-color);
    background-color: var(--primary-color) !important;
}

.syn-radio input[type="radio"]:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.syn-radio-label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-color);
    line-height: 1.4;
}

/* ─── syn-help-text ──────────────────────────────────────────────────────── */

.syn-help-text {
    display: block;
    font-size: 0.78rem;
    color: var(--text-muted);
    margin-top: 0.3rem;
    line-height: 1.45;
}

/* ─── syn-alert ──────────────────────────────────────────────────────────── */

.syn-alert {
    display: flex;
    align-items: flex-start;
    gap: 0.625rem;
    padding: 0.625rem 0.875rem;
    border: 1.5px solid transparent;
    border-radius: var(--radius-base);
    font-size: 0.875rem;
    color: var(--text-color);
    line-height: 1.5;
}

.syn-alert-icon {
    flex-shrink: 0;
    font-size: 1.1rem;
    margin-top: 0.05rem;
}

.syn-alert--danger {
    background: var(--danger-bg-light);
    border-color: rgba(var(--danger-color-rgb), 0.25);
}

.syn-alert--danger .syn-alert-icon {
    color: var(--danger-color);
}

.syn-alert--info {
    background: rgba(var(--primary-color-rgb), 0.06);
    border-color: rgba(var(--primary-color-rgb), 0.2);
}

.syn-alert--info .syn-alert-icon {
    color: var(--primary-color);
}

.syn-alert--success {
    background: var(--success-bg-light);
    border-color: rgba(var(--success-color-rgb), 0.25);
}

.syn-alert--success .syn-alert-icon {
    color: var(--success-color);
}

.syn-alert--warning {
    background: var(--warning-bg-light);
    border-color: rgba(var(--warning-color-rgb), 0.25);
}

.syn-alert--warning .syn-alert-icon {
    color: var(--warning-color);
}

/* ─── syn-progress / syn-spinner ────────────────────────────────────────── */

.syn-progress {
    height: 6px;
    overflow: hidden;
    background-color: var(--surface-muted);
    border-radius: 999px;
}

.syn-progress-bar {
    height: 100%;
    background-color: var(--primary-color);
    border-radius: inherit;
    transition: width 0.18s ease;
}

.syn-spinner {
    display: inline-block;
    width: 2rem;
    height: 2rem;
    border: 0.25em solid var(--primary-color);
    border-right-color: transparent;
    border-radius: 50%;
    animation: syn-spin 0.75s linear infinite;
}

.syn-spinner--sm {
    width: 1rem;
    height: 1rem;
    border-width: 0.2em;
}

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

/* ─── syn-dropdown ──────────────────────────────────────────────────────── */

.syn-dropdown {
    position: relative;
}

.syn-dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    z-index: 1000;
    display: none;
    min-width: 12rem;
    padding: 0.375rem;
    margin: 0.25rem 0 0;
    color: var(--text-color);
    text-align: left;
    list-style: none;
    background-color: var(--surface-color);
    border: 1.5px solid var(--border-color);
    border-radius: var(--radius-base);
    box-shadow: 0 8px 24px rgba(var(--nav-shadow-rgb), 0.14);
}

.syn-dropdown-menu.show {
    display: block;
}

.syn-dropdown-menu--right {
    right: 0;
    left: auto;
}

.syn-dropdown-item {
    display: flex;
    align-items: center;
    width: 100%;
    gap: 0.375rem;
    padding: 0.45rem 0.625rem;
    clear: both;
    font-weight: 500;
    color: var(--text-color);
    text-align: inherit;
    white-space: nowrap;
    background-color: transparent;
    border: 0;
    border-radius: var(--radius-xs);
    cursor: pointer;
}

.syn-dropdown-item:hover {
    color: var(--heading-color);
    background-color: var(--surface-muted);
}

.syn-dropdown-header {
    display: block;
    padding: 0.375rem 0.625rem 0.25rem;
    margin: 0;
    font-size: 0.7rem;
    font-weight: 700;
    color: var(--label-color);
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

/* ─── syn-filter-bar ─────────────────────────────────────────────────────── */

.syn-filter-bar {
    display: inline-flex;
    gap: 0.125rem;
    background: var(--surface-muted);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-base);
    padding: 0.1875rem;
}

.syn-filter-btn {
    border: none;
    background: transparent;
    color: var(--text-muted);
    border-radius: calc(var(--radius-base) - 2px);
    padding: 0.25rem 0.75rem;
    font-size: 0.8125rem;
    font-family: inherit;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.15s, color 0.15s;
    white-space: nowrap;
    line-height: 1.5;
}

.syn-filter-btn:hover {
    background: var(--surface-color);
    color: var(--text-color);
}

.syn-filter-btn--active {
    background: var(--primary-color);
    color: var(--white-color);
    box-shadow: 0 1px 3px rgba(var(--nav-shadow-rgb), 0.15);
}

.syn-filter-btn--danger.syn-filter-btn--active {
    background: var(--danger-color);
}

/* Neuigkeiten — page */
.changelog-release {
    border-bottom: 1px solid var(--border-color);
    background: var(--surface-color);
    border-left: 3px solid var(--primary-color);
}
.changelog-release:last-child {
    border-bottom: none;
}
.changelog-release-header {
    display: flex;
    align-items: center;
    padding: 0.875rem 1.125rem;
    gap: 0.75rem;
}
.changelog-release-name {
    flex: 1;
    min-width: 0;
}
.changelog-release-title {
    display: block;
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--heading-color);
    line-height: 1.2;
}
.changelog-release-summary {
    display: block;
    font-size: 0.7rem;
    color: var(--text-muted);
    margin-top: 0.1rem;
}
.changelog-release-date {
    font-size: 0.75rem;
    font-variant-numeric: tabular-nums;
    color: var(--text-muted);
    white-space: nowrap;
    flex-shrink: 0;
}
.changelog-release-body {
    padding: 0.75rem 1.125rem 1rem;
    background: var(--surface-muted);
    border-top: 1px solid var(--border-color);
}
.changelog-release-details {
    margin: 0;
    padding: 0;
    list-style: none;
}
.changelog-release-details li {
    padding: 0.45rem 0;
    border-bottom: 1px solid var(--border-color);
}
.changelog-release-details li:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

/* Neuigkeiten — modal */
.changelog-modal-item-top {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: 0.5rem;
}
.changelog-modal-date {
    font-size: 0.7rem;
    font-variant-numeric: tabular-nums;
    color: var(--text-muted);
    flex-shrink: 0;
}
.changelog-modal-features {
    margin: 0;
    padding: 0;
    list-style: none;
}
.changelog-modal-features li {
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--border-color);
}
.changelog-modal-features li:last-child {
    border-bottom: none;
    padding-bottom: 0;
}
.changelog-modal-summary {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin: 0;
}

/* Shared detail item — used in both page and modal */
.changelog-detail-subject {
    display: block;
    font-weight: 600;
    font-size: 0.82rem;
    color: var(--heading-color);
    line-height: 1.3;
}
.changelog-detail-desc {
    display: block;
    font-size: 0.77rem;
    color: var(--text-muted);
    margin-top: 0.15rem;
    line-height: 1.5;
}

.nav-news-badge {
    position: absolute;
    top: 2px;
    right: -2px;
    min-width: 16px;
    height: 16px;
    padding: 0 4px;
    border-radius: 8px;
    background: var(--danger-color, #dc3545);
    color: #fff;
    font-size: 0.65rem;
    line-height: 16px;
    text-align: center;
    font-weight: 600;
}