:root {
    /* Modernes Hell-Design für Sidebar */
    --sidebar-bg: var(--bg-primary);                    /* Reines Weiß */
    --sidebar-bg-soft: var(--bg-secondary);             /* Leichtes Grau */
    --sidebar-text: var(--text-primary);                /* Dunkelgrau */
    --sidebar-text-muted: var(--text-tertiary);         /* Gedämpfter Text */
    --sidebar-hover-bg: var(--state-hover);             /* Subtiler Hover */
    --sidebar-active-bg: var(--color-primary-bg);       /* Türkis Tint */
    --sidebar-border: var(--color-primary);             /* Türkis */
    --sidebar-line: var(--border-primary);              /* Helles Grau */
    --sidebar-focus: var(--color-primary);              /* Türkis Focus */
    --sidebar-shadow: var(--shadow-sm);                 /* Subtiler Schatten */
}

[data-theme="dark"] {
    /* Modernes Dunkel-Design für Sidebar */
    --sidebar-bg: var(--bg-primary);                    /* Sehr dunkel #0f172a */
    --sidebar-bg-soft: var(--bg-secondary);             /* Dunkelgrau */
    --sidebar-text: var(--text-primary);                /* Sehr hell */
    --sidebar-text-muted: var(--text-tertiary);         /* Gedämpfter Text */
    --sidebar-hover-bg: var(--state-hover);             /* Dunkel Hover */
    --sidebar-active-bg: var(--state-focus);            /* Türkis Tint */
    --sidebar-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.5);
}

.sidebar-nav {
    list-style: none;
    padding: 0;
    margin: 0;
    color: var(--sidebar-text);
}

.sidebar-item {
    margin-bottom: 2px;
}

.sidebar-link,
.sidebar-button,
.tree-toggle {
    display: flex;
    align-items: center;
    gap: .75rem;
    padding: .65rem 1rem;
    border-radius: .5rem;
    color: var(--sidebar-text);
    text-decoration: none;
    background: transparent;
    border: 0;
    width: 100%;
    text-align: left;
    transition: all .2s cubic-bezier(0.4, 0, 0.2, 1);
    font-weight: 450;
}

.sidebar-link:hover,
.sidebar-button:hover,
.tree-toggle:hover {
    background: var(--sidebar-hover-bg);
    color: var(--sidebar-text);
    text-decoration: none;
}

.sidebar-link:focus,
.sidebar-button:focus,
.tree-toggle:focus {
    outline: 2px solid var(--sidebar-focus);
    outline-offset: 2px;
}

.sidebar-link.active,
.sidebar-button.active {
    background: var(--sidebar-active-bg);
    color: var(--sidebar-text);
    font-weight: 600;
    box-shadow: inset 3px 0 0 var(--color-primary);
}

.sidebar-icon {
    width: 1.25rem;
    height: 1.25rem;
    text-align: center;
    opacity: .7;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all .2s ease;
    color: var(--sidebar-text-muted);
}

.sidebar-item.sidebar-group {
    position: relative;
}

.sidebar-item.sidebar-group::before {
    display: none;
}

.sidebar-item.sidebar-group.open > .tree-toggle {
    background: transparent;
    color: var(--sidebar-text);
}

.sidebar-sublist {
    list-style: none;
    margin: 0 0 .5rem 0;
    padding: 0 0 0 1.5rem;
    border-left: none;
}

.sidebar-sublist .sidebar-link,
.sidebar-sublist .sidebar-button,
.sidebar-sublist .tree-toggle {
    padding-left: 1rem;
    font-size: .88rem;
}

.sidebar-sublist .sidebar-link:hover,
.sidebar-sublist .sidebar-button:hover,
.sidebar-sublist .tree-toggle:hover {
    background: var(--sidebar-hover-bg);
    color: var(--sidebar-text);
}

.caret {
    width: 1.25rem;
    height: 1.25rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: transform .2s cubic-bezier(0.4, 0, 0.2, 1);
    opacity: .6;
    color: var(--sidebar-text-muted);
    border-radius: .35rem;
}

.caret i {
    font-size: .75rem;
}

.caret:hover {
    opacity: 1;
    background: var(--sidebar-hover-bg);
}

.caret.rotate {
    transform: rotate(90deg);
    opacity: 1;
}

@media (prefers-reduced-motion: reduce) {
    .sidebar-link,
    .sidebar-button,
    .tree-toggle,
    .caret {
        transition: none;
    }
}

/* Distinguish leaf links vs collapsible groups */
.leaf-link,
.leaf-button {
    position: relative;
    padding-left: 1rem;
}

.leaf-link::before,
.leaf-button::before {
    display: none;
}

.leaf-link--icon {
    padding-left: .85rem;
}

.leaf-link--icon::before {
    display: none;
}

.leaf-button--icon {
    padding-left: .85rem;
    border-style: dashed;
}

.leaf-button--icon::before {
    display: none;
}


.sidebar-sublist .leaf-link,
.sidebar-sublist .leaf-button {
    padding-left: 1rem;
}

.leaf-button {
    border: 1px dashed var(--border-secondary);
    background: var(--bg-secondary);
}

.sidebar-group-toggle {
    background: var(--sidebar-bg-soft);
    border: 1px solid var(--border-primary);
    color: var(--sidebar-text);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: .08em;
    font-size: .8rem;
    padding: .7rem 1rem;
    gap: .75rem;
}

.sidebar-group-toggle .caret {
    width: 1.25rem;
    height: 1.25rem;
    border-radius: .35rem;
    background: transparent;
    color: var(--sidebar-text-muted);
}

.sidebar-group-toggle .caret:hover {
    background: var(--sidebar-hover-bg);
}

.sidebar-group-toggle .caret.rotate {
    background: transparent;
    color: var(--sidebar-text);
}

.sidebar-group-label {
    flex: 1;
    letter-spacing: .06em;
}

.sidebar-item.sidebar-group.open > .sidebar-group-toggle {
    background: var(--sidebar-active-bg);
    border-color: var(--color-primary);
    box-shadow: inset 3px 0 0 var(--color-primary);
}

.shell.collapsed aside.app-sidebar .leaf-link,
.shell.collapsed aside.app-sidebar .leaf-button {
    padding-left: 1rem;
}

.shell.collapsed aside.app-sidebar .leaf-link::before,
.shell.collapsed aside.app-sidebar .leaf-button::before {
    display: none;
}



.sidebar-nav {
    font-size: .92rem;
}

.sidebar-item {
    margin-bottom: .45rem;
}

.sidebar-nav > .sidebar-item {
    margin-bottom: .35rem;
}

.sidebar-item.sidebar-group + .sidebar-item.sidebar-group {
    margin-top: .75rem;
}

.sidebar-link,
.sidebar-button,
.tree-toggle {
    font-size: .9rem;
    color: rgba(207, 219, 232, .95);
}

.leaf-link,
.leaf-button {
    font-size: .88rem;
    color: var(--sidebar-text);
    font-weight: 400;
}

.leaf-link:hover,
.leaf-link:focus,
.leaf-button:hover,
.leaf-button:focus {
    color: var(--sidebar-text);
    font-weight: 450;
}

.leaf-link.active,
.leaf-button.active,
.sidebar-link.active,
.sidebar-button.active {
    color: var(--sidebar-text);
    background: var(--sidebar-active-bg);
    font-weight: 600;
    box-shadow: inset 3px 0 0 var(--color-primary);
}

.sidebar-item[role="separator"] hr {
    border: 0;
    border-top: 1px solid var(--sidebar-line);
    margin: 1rem 0;
}

.sidebar-sublist {
    margin: 0 0 .5rem 0;
    padding-left: 1.5rem;
    border-left: none;
}

.sidebar-filter {
    margin: .5rem 1rem .75rem;
    padding: .65rem .85rem;
    background: var(--sidebar-bg-soft);
    border-radius: .65rem;
    border: 1px solid var(--border-primary);
}

.sidebar-filter-row {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 130px;
    gap: .5rem;
    align-items: center;
}

.sidebar-filter-input,
.sidebar-filter-select {
    background: var(--bg-primary);
    border-color: var(--border-secondary);
    color: var(--sidebar-text);
    border-radius: .5rem;
    padding: .5rem .75rem;
    transition: all .2s ease;
}

.sidebar-filter-input::placeholder {
    color: var(--sidebar-text-muted);
}

.sidebar-filter-select {
    appearance: none;
}

.sidebar-filter-select:focus,
.sidebar-filter-input:focus {
    border-color: var(--sidebar-focus);
    outline: none;
    box-shadow: var(--shadow-focus);
}

.sidebar-group-toggle {
    font-size: .9rem;
}

.sidebar-group-toggle .sidebar-icon,
.leaf-link .sidebar-icon,
.leaf-button .sidebar-icon {
    color: var(--sidebar-text-muted);
}

.sidebar-link:hover .sidebar-icon,
.sidebar-button:hover .sidebar-icon,
.tree-toggle:hover .sidebar-icon,
.leaf-link:hover .sidebar-icon,
.leaf-button:hover .sidebar-icon {
    opacity: 1;
}

.sidebar-link.active .sidebar-icon,
.sidebar-button.active .sidebar-icon,
.leaf-link.active .sidebar-icon,
.leaf-button.active .sidebar-icon {
    color: var(--color-primary);
    opacity: 1;
}

.sidebar-group-toggle .sidebar-icon-fallback,
.leaf-link .sidebar-icon-fallback,
.leaf-button .sidebar-icon-fallback {
    color: var(--sidebar-text-muted);
}

.sidebar-group-toggle .sidebar-group-label {
    font-weight: 600;
    text-transform: uppercase;
    font-size: .82rem;
    letter-spacing: .08em;
}

.sidebar-nav .sidebar-item .sidebar-link:focus-visible,
.sidebar-nav .sidebar-item .sidebar-button:focus-visible,
.sidebar-nav .sidebar-item .tree-toggle:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
    box-shadow: var(--shadow-focus);
}

.shell.collapsed aside.app-sidebar .sidebar-filter {
    display: none;
}