:root {
    --alignment-surface: #ffffff;
    --alignment-surface-muted: #f8f9fa;
    --alignment-surface-subtle: #e9ecef;
    --alignment-border: #e9ecef;
    --alignment-border-muted: #939395;
    --alignment-text-primary: #495057;
    --alignment-text-strong: #2c3e50;
    --alignment-focus-ring: #e57124;
    --alignment-focus-ring-strong: #0066ff;
    --alignment-interactive-accent: #764ba2;

    --token-source-label: #004794;
    --token-source-emphasis: #0000f5;
    --token-target-label: #680a6f;
    --token-target-emphasis: #860a8f;

    --token-state-hover-bg: #ebebeb;
    --token-state-selected-bg: #ebebeb;
    --token-state-aligned-text: #4d4d4d;
    --token-state-aligned-outline: #939395;
    --token-state-highlight-bg: #ebebeb;
    --token-state-activated-bg: #ebebeb;

    --menu-surface: #ffffff;
    --menu-border: #2c3e50;
    --menu-text: #495057;
    --menu-hover-bg: #e9ecef;
    --menu-focus-ring: #764ba2;
    --menu-selected-bg: #e8f4f8;
    --menu-selected-text: #2c3e50;

    --indicator-neutral-border: #6b7280;
    --indicator-minor-border: #ca8a04;
    --indicator-major-border: #c2410c;
    --indicator-critical-border: #8b0000;
    --indicator-text: #000000;
    --error-text: #721c24;

    --clean: #1f6f43;
    --dirty: #8a5a00;
    --saving: #0053a0;
}

@media (prefers-color-scheme: dark) {
    :root {
        --alignment-surface: #070a0c;
        --alignment-surface-muted: #222b38;
        --alignment-surface-subtle: #242f3d;
        --alignment-border: #374151;
        --alignment-border-muted: #9ca3af;
        --alignment-text-primary: #d1d5db;
        --alignment-text-strong: #f3f4f6;
        --alignment-focus-ring: #f6ad55;
        --alignment-focus-ring-strong: #60a5fa;
        --alignment-interactive-accent: #b794f6;

        --token-source-label: #6cabf9;
        --token-source-emphasis: #8ab8ff;
        --token-target-label: #f0a0d0;
        --token-target-emphasis: #f6b7e8;

        --token-state-hover-bg: #2e3541;
        --token-state-selected-bg: #2e3541;
        --token-state-aligned-text: #bcc5d6;
        --token-state-aligned-outline: #9ca3af;
        --token-state-highlight-bg: #2e3541;
        --token-state-activated-bg: #2e3541;

        --menu-surface: #111827;
        --menu-border: #60a5fa;
        --menu-text: #e5e7eb;
        --menu-hover-bg: #1f2937;
        --menu-focus-ring: #b794f6;
        --menu-selected-bg: #1e3a4c;
        --menu-selected-text: #dbeafe;

        --indicator-neutral-border: #6b7280;
        --indicator-minor-border: #ca8a04;
        --indicator-major-border: #c2410c;
        --indicator-critical-border: #8b0000;
        --indicator-text: #000000;
        --error-text: #fecaca;

        --clean: #65e29d;
        --dirty: #eaba61;
        --saving: #74aaec;
    }
}

[data-theme='light'] {
    --alignment-surface: #ffffff;
    --alignment-surface-muted: #f8f9fa;
    --alignment-surface-subtle: #e9ecef;
    --alignment-border: #e9ecef;
    --alignment-border-muted: #939395;
    --alignment-text-primary: #495057;
    --alignment-text-strong: #2c3e50;
    --alignment-focus-ring: #e57124;
    --alignment-focus-ring-strong: #0066ff;
    --alignment-interactive-accent: #764ba2;
    --token-source-label: #004794;
    --token-source-emphasis: #0000f5;
    --token-target-label: #680a6f;
    --token-target-emphasis: #860a8f;
    --token-state-hover-bg: #ebebeb;
    --token-state-selected-bg: #ebebeb;
    --token-state-aligned-text: #4d4d4d;
    --token-state-aligned-outline: #939395;
    --token-state-highlight-bg: #ebebeb;
    --token-state-activated-bg: #ebebeb;
    --menu-surface: #ffffff;
    --menu-border: #2c3e50;
    --menu-text: #495057;
    --menu-hover-bg: #e9ecef;
    --menu-focus-ring: #764ba2;
    --menu-selected-bg: #e8f4f8;
    --menu-selected-text: #2c3e50;
    --indicator-neutral-border: #6b7280;
    --indicator-minor-border: #ca8a04;
    --indicator-major-border: #c2410c;
    --indicator-critical-border: #8b0000;
    --indicator-text: #000000;
    --error-text: #721c24;
    --clean: #1f6f43;
    --dirty: #8a5a00;
    --saving: #0053a0;
}

[data-theme='dark'] {
    --alignment-surface: #070a0c;
    --alignment-surface-muted: #222b38;
    --alignment-surface-subtle: #242f3d;
    --alignment-border: #374151;
    --alignment-border-muted: #9ca3af;
    --alignment-text-primary: #d1d5db;
    --alignment-text-strong: #f3f4f6;
    --alignment-focus-ring: #f6ad55;
    --alignment-focus-ring-strong: #60a5fa;
    --alignment-interactive-accent: #b794f6;
    --token-source-label: #6cabf9;
    --token-source-emphasis: #8ab8ff;
    --token-target-label: #f0a0d0;
    --token-target-emphasis: #f6b7e8;
    --token-state-hover-bg: #2e3541;
    --token-state-selected-bg: #2e3541;
    --token-state-aligned-text: #bcc5d6;
    --token-state-aligned-outline: #9ca3af;
    --token-state-highlight-bg: #2e3541;
    --token-state-activated-bg: #2e3541;
    --menu-surface: #111827;
    --menu-border: #60a5fa;
    --menu-text: #e5e7eb;
    --menu-hover-bg: #1f2937;
    --menu-focus-ring: #b794f6;
    --menu-selected-bg: #1e3a4c;
    --menu-selected-text: #dbeafe;
    --indicator-neutral-border: #6b7280;
    --indicator-minor-border: #ca8a04;
    --indicator-major-border: #c2410c;
    --indicator-critical-border: #8b0000;
    --indicator-text: #000000;
    --error-text: #fecaca;
    --clean: #65e29d;
    --dirty: #eaba61;
    --saving: #74aaec;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

table {
    border-collapse: collapse;
    width: 100%;
    margin-top: 1rem;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    border-radius: 8px;
    overflow: hidden;
}

tr.odd {
    background: var(--alignment-surface-muted);
}

tr.even {
    background: var(--alignment-surface-subtle);
}

table thead th {
    padding: 1rem 0 0.2rem 0;
}

table td,
table tbody th {
    padding: 1rem;
    border: 1px solid var(--alignment-border);
    text-align: center;
}

kbd {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 1.6em;
    padding: 0.1rem 0.45rem;
    border: 1px solid var(--alignment-border-muted);
    border-bottom-width: 2px;
    border-radius: 6px;
    background: linear-gradient(180deg, var(--alignment-surface), var(--alignment-surface-subtle));
    color: var(--alignment-text-strong);
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, Liberation Mono, monospace;
    font-size: 0.85em;
    font-weight: 600;
    line-height: 1.2;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.7), 0 1px 1px rgba(0, 0, 0, 0.08);
    vertical-align: baseline;
    white-space: nowrap;
}

.upload-settings-section {
    background: var(--alignment-surface);
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.07);
    padding: 1.2rem;
    margin-bottom: 1rem;
}

.upload-settings-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
}

.settings-container {
    display: flex;
    justify-content: center;
    gap: 1rem;
}

.segmentation-edit-control-wrap {
    position: relative;
    display: inline-flex;
}

.btn-tooltip {
    position: absolute;
    top: calc(100% + 0.4rem);
    left: 50%;
    transform: translateX(-50%);
    min-width: 15rem;
    max-width: 20rem;
    padding: 0.45rem 0.6rem;
    border-radius: 6px;
    background: var(--menu-surface);
    color: var(--menu-text);
    border: 1px solid var(--menu-border);
    font-size: 0.82rem;
    z-index: 80;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.settings-btn[aria-pressed='true'] {
    outline: 2px solid var(--alignment-focus-ring-strong);
    outline-offset: 1px;
}

.settings-btn[aria-disabled='true'] {
    opacity: 0.6;
    cursor: not-allowed;
}

.settings-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: transform 0.15s ease, box-shadow 0.15s ease;
    box-shadow: 0 2px 8px rgba(44, 62, 80, 0.25);
}

.settings-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(44, 62, 80, 0.35);
}

.settings-btn:focus {
    outline: 3px solid var(--alignment-focus-ring-strong);
    outline-offset: 2px;
}

.alignment-workspace {
    background: var(--alignment-surface);
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.07);
    padding: 2rem;
}

.read-only-note {
    margin-bottom: 1rem;
    color: var(--alignment-text-primary);
}

.stats-container {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.25rem;
    align-items: center;
    margin-bottom: 1rem;
    padding: 1.2rem;
    background: var(--alignment-surface-muted);
    border-radius: 8px;
}

.alignment-save-panel {
    position: fixed;
    right: 1.25rem;
    bottom: 1.25rem;
    z-index: 40;
    padding: 0.9rem 1rem;
    border: 1px solid var(--alignment-border);
    border-radius: 10px;
    background: var(--alignment-surface);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
    width: min(28rem, calc(100vw - 2.5rem));
}

.save-panel-status-wrap {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.save-panel-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.save-panel-sub-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

/* Mode label: icon + text inline */
#save-panel-mode-label {
    display: inline-flex;
    align-items: center;
    gap: 0.4em;
}

.save-panel-mode-icon {
    display: inline-flex;
    align-items: center;
    flex-shrink: 0;
}

.save-panel-mode-icon svg {
    width: 1.1em;
    height: 1.1em;
}

/* Back-to-study tab: sits above the inline-end corner of the save panel */
.back-to-study-btn {
    position: absolute;
    top: 16px;
    right: -10px;
    transform: translateY(-100%);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2rem;
    height: 2rem;
    padding: 0;
    background: var(--alignment-surface);
    border: 1px solid var(--alignment-border);
    border-radius: 6px;
    color: var(--text-secondary);
    text-decoration: none;
    cursor: pointer;
    box-shadow: 0 -2px 6px rgba(0, 0, 0, 0.06);
    transition: color 0.15s ease, background-color 0.15s ease;
}

.back-to-study-btn svg {
    width: 1.1rem;
    height: 1.1rem;
    flex-shrink: 0;
}

.back-to-study-btn:hover {
    color: var(--text-primary);
    background-color: var(--alignment-surface-muted);
}

.back-to-study-btn:focus-visible {
    outline: 2px solid var(--alignment-focus-ring);
    outline-offset: -2px;
    color: var(--text-primary);
}

.alignment-save-panel.segmentation-mode {
    display: grid;
    grid-template-columns: 1fr;
    grid-template-rows: auto auto auto auto;
    align-items: start;
}

.alignment-save-panel.segmentation-mode .save-panel-status-wrap {
    grid-row: 1;
}

.alignment-save-panel.segmentation-mode #save-panel-messages {
    grid-row: 2;
}

.alignment-save-panel.segmentation-mode .save-panel-actions {
    grid-row: 3;
    justify-content: flex-start;
}

.alignment-save-panel.segmentation-mode .save-panel-sub-actions {
    grid-row: 4;
}

.segmentation-context-menu {
    min-width: 16rem;
}

.segment.segmentation-selected {
    outline: 2px dashed var(--alignment-focus-ring-strong);
    outline-offset: 2px;
}

.token.segmentation-selected,
.token.segmentation-selected:focus {
    background: var(--token-state-selected-bg);
    outline: 2px solid var(--alignment-focus-ring-strong);
    color: var(--alignment-text-strong);
}

.segment.segmentation-empty .tokens-container {
    min-height: 2.2rem;
    border: 1px dashed var(--alignment-border-muted);
}

/* Elements not eligible for selection in segmentation mode */
.non-selectable {
    cursor: not-allowed !important;
    filter: grayscale(1) brightness(0.8) blur(1px);
}

.token.non-selectable:hover {
    background: transparent !important;
    outline: none !important;
}

.pair-done-toggle.non-selectable,
.pair-done-checkbox.non-selectable,
.segment.target.non-selectable {
    cursor: not-allowed !important;
}

.token.selectable[data-type='target'] {
    background: #fbecec;
}

.token.selectable[data-type='target']:hover,
.token.selectable[data-type='target']:focus {
    background: #f8dede;
}

[data-theme='dark'] .token.selectable[data-type='target'] {
    background: #301010;
}

[data-theme='dark'] .token.selectable[data-type='target']:hover,
[data-theme='dark'] .token.selectable[data-type='target']:focus {
    background: #401a1a;
}

/* Full styling for segmentation context menu (mirrors #token-context-menu) */
#segmentation-context-menu {
    background: var(--menu-surface);
    border: 1px solid var(--menu-border);
    color: var(--menu-text);
    border-radius: 6px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    min-width: 220px;
    padding: 0.5rem;
    font-size: 0.8rem;
    margin: 0;
    position: absolute;
    z-index: 2000;
}

#segmentation-context-menu::backdrop {
    background: transparent;
}

/* In segmentation mode, suppress interactivity on individual source tokens —
   the entire source segment element is the clickable/focusable unit instead */
.segments-container[data-mode="segmentation"] .segment.source .token {
    pointer-events: none;
    cursor: default;
}

.segments-container[data-mode="segmentation"] .segment.source .token:hover,
.segments-container[data-mode="segmentation"] .segment.source .token:focus,
.segments-container[data-mode="segmentation"] .segment.source .token:focus-visible {
    background: transparent;
    outline: none;
    border-color: transparent;
}

/* Source segments themselves become interactive in segmentation mode */
.segments-container[data-mode="segmentation"] .segment.source {
    cursor: pointer;
}

.segments-container[data-mode="segmentation"] .segment.source:hover {
    outline: 1px solid var(--alignment-focus-ring);
    outline-offset: 2px;
}

.segments-container[data-mode="segmentation"] .segment.source:focus,
.segments-container[data-mode="segmentation"] .segment.source:focus-visible {
    outline: 2px solid var(--alignment-focus-ring-strong);
    outline-offset: 2px;
}

.segmentation-instructions-content {
    width: 100%;
    min-height: auto;
    align-self: stretch;
}

.segmentation-instructions-body {
    width: clamp(70ch, 50%, 75ch);
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.segmentation-instructions-body > * {
    margin: 0;
}

.segmentation-instructions-body h3 {
    margin-bottom: 0.5rem;
}

.segmentation-instructions-body ul {
    margin: 0;
    padding-inline-start: 1.25rem;
}

.segmentation-instructions-actions {
    display: flex;
    justify-content: flex-end;
    margin-top: 1.5rem;
    padding-top: 0.5rem;
}

.save-status {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
}

.save-status-icon {
    flex-shrink: 0;
    width: 1rem;
    height: 1rem;
}

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

.save-status.saving .save-status-icon {
    animation: save-status-spin 1s linear infinite;
}

.save-status.clean {
    color: var(--clean);
}

.save-status.dirty {
    color: var(--dirty);
}

.save-status.saving {
    color: var(--saving);
}

.save-status.error {
    color: var(--error-text);
}

@media (max-width: 720px) {
    .alignment-save-panel {
        right: 0.75rem;
        bottom: 0.75rem;
        width: calc(100vw - 1.5rem);
        flex-direction: column;
        align-items: stretch;
    }

    .save-panel-actions {
        justify-content: stretch;
    }

    .save-panel-actions .btn {
        flex: 1 1 auto;
    }
}

.pair-done-bar {
    display: inline-flex;
    flex-direction: row;
    align-items: center;
    gap: 0.75rem;
    margin-top: 0.35rem;
}

.pair-done-toggle {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    margin: 0;
}

.pair-done-checkbox {
    appearance: auto;
}

.disband-all-btn {
    background-color: transparent;
    border-width: 1px;
    border-color: var(--border-color);
    color: var(--secondary-color);
    padding: 0.35em 0.5em;
    font-size: 0.5em;
    font-weight: 400;
}

.stat {
    text-align: center;
}

.stat-label {
    display: block;
    font-size: 0.9rem;
    color: var(--alignment-text-primary);
    margin-bottom: 0.25rem;
}

.stat-value {
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--alignment-text-primary);
}

.segments-container {
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
}

.segment-pair {
    border: 1px solid var(--alignment-border);
    border-radius: 8px;
    padding: 0.5rem 0.8rem;
    background: var(--alignment-surface-muted);
    position: relative;
    margin-left: 0.1rem;
}

.segment-pair:hover {
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.segment-pair:focus {
    outline: 2px solid var(--alignment-text-primary);
    outline-offset: 2px;
}

.segment-pair.horizontal {
    display: grid;
    grid-template-columns: 1fr 1fr;
    row-gap: 1.5rem;
    column-gap: 1rem;
    align-items: start;
}

.segment-pair.horizontal .pair-done-bar {
    grid-column: 1 / -1;
}

.segment-pair.vertical {
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
}

.segment {
    background: var(--alignment-surface);
    border-radius: 6px;
    border: 1px solid transparent;
    position: relative;
}

.segment.source {
    padding: 0.1rem 0.6rem 0.1rem 0.6rem;
    border-left: 4px solid var(--token-source-emphasis);
}

.segment.target {
    padding: 0.1rem 0.6rem 0.3rem 0.6rem;
    border-left: 4px solid var(--token-target-emphasis);
}

.segment-label {
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.5px;
    position: absolute;
    background: var(--alignment-surface);
    padding: 0.2rem 0.4rem;
    border: 1px solid var(--alignment-border);
    border-radius: 4px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.segment-pair.vertical .segment-label {
    left: -2.4rem;
    top: 50%;
    transform: translateY(-50%);
    max-width: 55px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    cursor: help;
}

.segment-label-tooltip {
    position: absolute;
    z-index: 2100;
    display: none;
    padding: 0.45rem 0.6rem;
    border-radius: 6px;
    background: var(--menu-surface);
    color: var(--menu-text);
    border: 1px solid var(--menu-border);
    font-size: 0.82rem;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
    pointer-events: none;
    white-space: nowrap;
}

.segment-label-tooltip.visible {
    display: block;
}

.segment-pair.horizontal .segment-label {
    top: -1.2rem;
    left: 0.5rem;
}

.segment.source .segment-label {
    color: var(--token-source-label);
}

.segment.target .segment-label {
    color: var(--token-target-label);
}

.tokens-container {
    display: flex;
    flex-wrap: wrap;
    gap: 0.3rem;
    align-items: center;
    direction: ltr;
    min-height: 2.5rem;
    padding: 0.5rem;
    border-radius: 4px;
    transition: background-color 0.2s ease;
}

.tokens-container[dir="rtl"] {
    direction: rtl;
}

.tokens-container:empty {
    border: 1px dashed var(--alignment-border-muted);
    background: var(--alignment-surface-subtle);
}

.segment-pair.vertical .segment.source .tokens-container {
    padding-bottom: 0;
}

.segment-pair.vertical .segment.target .tokens-container {
    padding-top: 0;
}

.token {
    display: inline-block;
    padding: 0.1rem;
    margin: 0 0.1rem;
    background: transparent;
    border: 1px solid transparent;
    border-radius: 4px;
    cursor: pointer;
    font-weight: 500;
    user-select: none;
    position: relative;
    font-size: 1.1rem;
}

.segment.source .token {
    color: var(--token-source-emphasis);
}

.segment.target .token {
    color: var(--token-target-emphasis);
}

.token:focus,
.token:hover {
    background: var(--token-state-hover-bg);
}

.segments-container[data-can-edit='false'] .token,
.token.disabled {
    cursor: not-allowed !important;
}

.token.selected {
    background: var(--token-state-selected-bg);
}

.segment.source .token.selected {
    border-color: var(--token-source-emphasis);
}

.segment.target .token.selected {
    border-color: var(--token-target-emphasis);
}

.segment.source .token.aligned,
.segment.target .token.aligned {
    background: transparent;
    color: var(--token-state-aligned-text);
    border: 1px dotted transparent;
    outline: 1px dotted var(--token-state-aligned-outline);
}

.segment.source .token.highlighted {
    color: var(--token-source-emphasis);
    background: var(--token-state-highlight-bg);
}

.segment.target .token.highlighted {
    color: var(--token-target-emphasis);
    background: var(--token-state-highlight-bg);
}

.segment.source .token.activated {
    color: var(--token-source-emphasis);
    background: var(--token-state-activated-bg);
    border: 1px solid var(--token-source-emphasis);
    outline: none;
}
.segment.source .token.aligned.selected:focus {
    border: 1px solid var(--token-source-emphasis);
}

.segment.target .token.activated {
    color: var(--token-target-emphasis);
    background: var(--token-state-activated-bg);
    border: 1px solid var(--token-target-emphasis);
    outline: none;
}
.segment.target .token.aligned.selected:focus {
    border: 1px solid var(--token-target-emphasis);
}

.segment.source .token.aligned.activated,
.segment.source .token.aligned.activated:focus {
    border: 1px solid var(--token-source-emphasis);
}
.segment.target .token.aligned.activated,
.segment.target .token.aligned.activated:focus {
    border: 1px solid var(--token-target-emphasis);
}

.token:focus,
.token.aligned:focus,
.token.activated:focus,
.segment.source .token.aligned:focus,
.segment.source .token.activated:focus,
.segment.target .token.aligned:focus,
.segment.target .token.activated:focus {
    outline: 1px dashed var(--alignment-focus-ring);
    outline-offset: 2px;
}

.segment.source .token.aligned.highlighted:focus,
.segment.target .token.aligned.highlighted:focus,
.segment.source .token.aligned:focus,
.segment.target .token.aligned:focus {
    border: 1px dotted var(--token-state-aligned-outline);
}

#token-context-menu {
    background: var(--menu-surface);
    border: 1px solid var(--menu-border);
    color: var(--menu-text);
    border-radius: 6px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    min-width: 220px;
    padding: 0.5rem;
    font-size: 0.8rem;
    margin: 0;
    position: absolute;
    z-index: 2000;
}

#token-context-menu::backdrop {
    background: transparent;
}

.token-context-menu-item {
    display: block;
    width: 100%;
    padding: 0.5rem;
    border: none;
    background: transparent;
    text-align: left;
    color: var(--menu-text);
    cursor: pointer;
    transition: background-color 0.15s ease;
    font-family: inherit;
    font-size: inherit;
    border-radius: 4px;
}

.token-context-menu-item:hover {
    background: var(--menu-hover-bg);
    color: var(--menu-text);
    outline: none;
}

.token-context-menu-item:focus,
.annot-category-item:focus {
    background-color: transparent;
    border-color: transparent;
    color: var(--menu-text);
    outline: 2px solid var(--menu-focus-ring);
    outline-offset: -2px;
}

.menu-separator {
    margin: 0.5rem 0;
    border: none;
    border-top: 1px solid var(--alignment-border);
}

.annot-categories {
    max-height: 360px;
    overflow-y: auto;
}

.annot-category-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    width: 100%;
    padding: 0.2rem 0.5rem;
    border: none;
    background: transparent;
    text-align: left;
    color: var(--menu-text);
    cursor: pointer;
    transition: background-color 0.15s ease;
    font-family: inherit;
    font-size: 0.7rem;
    border-radius: 4px;
    min-height: 1.5rem;
}

.annot-category-item:hover {
    background: var(--menu-hover-bg);
    outline: none;
}

.annot-category-item:focus {
    outline: 2px solid var(--menu-focus-ring);
    outline-offset: -2px;
}

.annot-category-item.selected {
    background: var(--menu-selected-bg);
    color: var(--menu-selected-text);
    font-weight: 500;
}

.annot-category-icon {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
    padding: 2px;
    border: 1px solid transparent;
    border-radius: 3px;
    color: #000000;
}

.annot-category-icon svg {
    width: 100%;
    height: 100%;
    display: block;
    fill: currentColor;
}

.annot-category-icon.neutral,
.token-annot-indicator.neutral {
    border: 1px solid var(--indicator-neutral-border);
}

.annot-category-icon.minor,
.token-annot-indicator.minor {
    border: 1px solid var(--indicator-minor-border);
}

.annot-category-icon.major,
.token-annot-indicator.major {
    border: 1px solid var(--indicator-major-border);
}

.annot-category-icon.critical,
.token-annot-indicator.critical {
    border: 1px solid var(--indicator-critical-border);
}

.annot-category-text {
    flex: 1;
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--menu-text);
}

.annot-category-hotkey {
    background: var(--menu-hover-bg);
    color: var(--menu-text);
    padding: 0.2rem 0.4rem;
    border-radius: 3px;
    font-size: 0.5rem;
    font-weight: 500;
    min-width: 1.2rem;
    text-align: center;
}

.token-annot-indicator {
    position: absolute;
    top: -7px;
    right: -7px;
    width: 14px;
    height: 14px;
    border-radius: 2px;
    border: 1px solid transparent;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 10px;
    z-index: 10;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
    color: var(--indicator-text);
}

.token-annot-indicator svg {
    width: 10px;
    height: 10px;
    display: block;
    fill: currentColor;
}

.layout-toggle {
    display: flex;
    gap: 0.5rem;
    background: var(--alignment-surface-muted);
    padding: 0.25rem;
    border-radius: 8px;
    border: 1px solid var(--alignment-border);
    margin: 0 0 2rem 0;
}

.layout-toggle legend {
    padding: 0 0 0.5rem 0;
    margin: 0;
    font-weight: 600;
    color: var(--alignment-text-strong);
}

.layout-toggle label {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    cursor: pointer;
    font-weight: 500;
    color: var(--alignment-text-strong);
    padding: 0.75rem 1.5rem;
    border-radius: 6px;
    transition: all 0.1s ease;
    flex: 1;
    text-align: center;
    background: transparent;
    border: 1px solid transparent;
}

.layout-toggle input[type='radio'] {
    position: absolute;
    opacity: 0;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
}

.layout-toggle label:has(input:checked) {
    background: var(--alignment-text-strong);
    color: var(--alignment-surface);
    border-color: var(--alignment-text-strong);
}

#error-message {
    color: var(--error-text);
    font-weight: 500;
    line-height: 1.6;
}

/* ============================================================
   Super Segmentation Mode
   ============================================================ */

/* Warning outline on the workspace when super seg mode is active */
.alignment-workspace.super-segmentation-mode {
    outline: 3px solid var(--warning-color);
    outline-offset: 3px;
    border-radius: 2px;
}

/* Source tokens are not interactive in super-seg mode (same as seg mode) */
.segments-container[data-mode="super-segmentation"] .segment.source .token {
    pointer-events: none;
    cursor: default;
}

.segments-container[data-mode="super-segmentation"] .segment.source .token:hover,
.segments-container[data-mode="super-segmentation"] .segment.source .token:focus,
.segments-container[data-mode="super-segmentation"] .segment.source .token:focus-visible {
    background: transparent;
    outline: none;
    border-color: transparent;
}

/* ── moved-token animation ──────────────────────────────────── */
@keyframes token-moved-highlight {
    0% {
        box-shadow: 0 0 0 3px var(--text-color), 0 0 18px 8px var(--text-color);
        opacity: 1;
    }
    50% {
        box-shadow: 0 0 0 2px var(--text-color), 0 0 8px 4px var(--text-color);
    }
    100% {
        box-shadow: 0 0 0 1px var(--text-color), 0 0 3px 1px var(--text-color);
    }
}

.token.moved {
    animation: token-moved-highlight 4s ease-out forwards;
    position: relative;
    z-index: 1;
}

/* Allow the glow to remain visible even when the token is non-selectable */
.token.moved.non-selectable {
    filter: none !important;
}

/* ── super-seg context menu ─────────────────────────────────── */
#super-seg-context-menu {
    background: var(--menu-surface);
    border: 1px solid var(--menu-border);
    color: var(--menu-text);
    border-radius: 6px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    min-width: 200px;
    padding: 0.75rem;
    font-size: 0.8rem;
    margin: 0;
    position: absolute;
    z-index: 2000;
}

#super-seg-context-menu::backdrop {
    background: transparent;
}

.super-seg-menu-label {
    margin: 0 0 0.5rem 0;
    font-weight: 600;
    color: var(--menu-text);
    font-size: 0.8rem;
}

.super-seg-menu-controls {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    margin-bottom: 0.5rem;
}

.super-seg-select {
    flex: 1;
    min-width: 0;
    padding: 0.2rem 0.4rem;
    border: 1px solid var(--alignment-border-muted);
    border-radius: 4px;
    background: var(--alignment-surface);
    color: var(--alignment-text-primary);
    font-size: 0.8rem;
}

.super-seg-select:focus {
    outline: 2px solid var(--menu-focus-ring);
    outline-offset: 1px;
}

/* ── save-panel messages ────────────────────────────────────── */
.save-panel-messages {
    padding: 0.3rem 0.2rem;
    color: var(--dirty);
    font-size: 0.8rem;
    font-style: italic;
}

/* superSegModeBtn: shown only in segmentation mode, hidden otherwise via JS */
#superSegModeBtn[aria-pressed='true'] {
    background: var(--alignment-interactive-accent);
    color: #fff;
}

#superSegModeBtn[aria-disabled='true'] {
    opacity: 0.5;
    cursor: not-allowed;
}

@media (max-width: 768px) {
    .settings-container {
        flex-direction: column;
        align-items: stretch;
    }

    .stats-container {
        grid-template-columns: 1fr;
    }

    .segment-pair {
        margin-left: 1rem;
    }

    .segment-pair.horizontal {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
}