* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 20px;
}

/* ── Top Nav Bar ── */
.top-nav {
    width: 100%;
    max-width: 900px;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 10px;
    margin-bottom: 20px;
    min-height: 40px;
}

.nav-btn {
    background: rgba(255,255,255,0.2);
    color: white;
    border: 1px solid rgba(255,255,255,0.3);
    padding: 8px 18px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    white-space: nowrap;
}

.nav-btn:hover {
    background: rgba(255,255,255,0.35);
}

.nav-user {
    color: rgba(255,255,255,0.85);
    font-size: 0.85rem;
    font-weight: 500;
}

.container {
    background: white;
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    padding: 40px;
    max-width: 600px;
    width: 100%;
    text-align: center;
}

.logo {
    font-size: 2.5rem;
    font-weight: 700;
    color: #333;
    margin-bottom: 10px;
}

.subtitle {
    color: #666;
    margin-bottom: 30px;
    font-size: 1.1rem;
}

.mode-buttons {
    display: flex;
    gap: 12px;
    justify-content: center;
    margin-bottom: 30px;
}

.btn {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    padding: 15px 30px;
    border-radius: 25px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    margin: 5px;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(102, 126, 234, 0.3);
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.btn-live {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
}

.btn-live:hover {
    box-shadow: 0 10px 20px rgba(245, 87, 108, 0.3);
}

.btn-sm {
    padding: 8px 18px;
    font-size: 0.85rem;
    margin: 3px;
    border-radius: 20px;
}

.upload-area {
    border: 3px dashed #ddd;
    border-radius: 15px;
    padding: 60px 20px;
    margin: 0 0 30px 0;
    transition: all 0.3s ease;
    cursor: pointer;
    position: relative;
    pointer-events: auto;
}

.upload-area:hover {
    border-color: #667eea;
    background-color: #f8f9ff;
}

.upload-area.dragover {
    border-color: #667eea;
    background-color: #f0f4ff;
    transform: scale(1.02);
}

.upload-icon {
    font-size: 3rem;
    color: #667eea;
    margin-bottom: 20px;
}

.upload-text {
    font-size: 1.2rem;
    color: #333;
    margin-bottom: 10px;
}

.upload-hint {
    color: #666;
    font-size: 0.9rem;
}

.file-input {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    cursor: pointer;
    z-index: 0;
    pointer-events: none;
}

.loading {
    display: none;
    margin: 30px 0;
}

.progress-bar-container {
    width: 100%;
    max-width: 420px;
    margin: 0 auto 18px;
    background: #e9ecf5;
    border-radius: 10px;
    height: 18px;
    overflow: hidden;
    position: relative;
}

.progress-bar-fill {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, #667eea, #764ba2);
    border-radius: 10px;
    transition: width 0.4s ease;
}

.progress-bar-label {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.7rem;
    font-weight: 600;
    color: #fff;
    mix-blend-mode: difference;
}

.progress-time {
    font-size: 0.85rem;
    color: #888;
    margin-bottom: 14px;
}

.progress-stage {
    font-size: 0.95rem;
    color: #444;
    font-weight: 500;
    margin-bottom: 6px;
}

.progress-steps {
    max-width: 420px;
    margin: 0 auto;
    text-align: left;
}

.progress-step {
    margin: 6px 0;
    padding: 8px 12px;
    border-radius: 8px;
    font-size: 0.88rem;
    display: flex;
    align-items: center;
    gap: 8px;
    background: #f1f3f9;
    color: #999;
    transition: all 0.3s ease;
}

.progress-step.active {
    background: #f0edff;
    color: #444;
    border-left: 3px solid #667eea;
    font-weight: 500;
}

.progress-step.done {
    background: #edf9ee;
    color: #38a169;
    border-left: 3px solid #38a169;
}

.progress-step-icon {
    font-size: 1rem;
    flex-shrink: 0;
    width: 20px;
    text-align: center;
}

.result {
    display: none;
    margin: 30px 0 0;
    padding: 20px;
    background: #f8f9ff;
    border-radius: 15px;
    border-left: 4px solid #667eea;
}

.success-icon {
    font-size: 2rem;
    color: #28a745;
    margin-bottom: 15px;
}

.error {
    background: #fff5f5;
    border-left-color: #e53e3e;
    color: #c53030;
}

.error-icon {
    color: #e53e3e;
}

.file-info {
    background: white;
    padding: 15px;
    border-radius: 10px;
    margin: 15px 0;
    text-align: left;
}

.file-info p {
    margin: 5px 0;
    color: #333;
}

.file-info strong {
    color: #667eea;
}

.file-selected {
    background: #e8f5e8;
    border: 1px solid #28a745;
    border-radius: 8px;
    padding: 10px;
    margin-top: 15px;
    color: #155724;
}

.action-buttons {
    display: flex;
    justify-content: center;
    gap: 15px;
    flex-wrap: wrap;
}

/* ── Modal ── */
.modal-overlay {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 2000;
    background: rgba(0,0,0,0.5);
    align-items: center;
    justify-content: center;
}

.modal-overlay.active {
    display: flex;
}

.modal {
    background: white;
    border-radius: 16px;
    padding: 36px;
    width: 100%;
    max-width: 420px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.2);
}

.modal h2 {
    margin-bottom: 24px;
    color: #333;
    text-align: center;
}

.modal-field {
    margin-bottom: 16px;
}

.modal-field label {
    display: block;
    font-weight: 600;
    color: #555;
    margin-bottom: 6px;
    font-size: 0.9rem;
}

.modal-field input, .modal-field select {
    width: 100%;
    padding: 10px 14px;
    border: 2px solid #e2e8f0;
    border-radius: 10px;
    font-size: 0.95rem;
    transition: border-color 0.2s;
}

.modal-field input:focus, .modal-field select:focus {
    outline: none;
    border-color: #667eea;
}

.modal-error {
    color: #e53e3e;
    font-size: 0.85rem;
    margin-bottom: 12px;
    display: none;
}

.modal-actions {
    display: flex;
    gap: 10px;
    margin-top: 20px;
}

.modal-actions .btn {
    flex: 1;
    margin: 0;
    padding: 12px;
}

.modal-link {
    display: block;
    text-align: center;
    margin-top: 16px;
    color: #667eea;
    cursor: pointer;
    font-size: 0.9rem;
}

.modal-link:hover {
    text-decoration: underline;
}

/* ── Project Dashboard ── */
.dashboard {
    display: none;
    background: white;
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
    padding: 36px;
    max-width: 700px;
    width: 100%;
}

.dashboard.active {
    display: block;
}

.dashboard-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
}

.dashboard-header h2 {
    color: #333;
    font-size: 1.5rem;
}

.project-list {
    list-style: none;
}

.project-card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    background: #f8f9ff;
    border-radius: 12px;
    margin-bottom: 12px;
    border-left: 4px solid #667eea;
    transition: transform 0.15s;
}

.project-card:hover {
    transform: translateX(4px);
}

.project-card-info {
    flex: 1;
    min-width: 0;
}

.project-card-title {
    font-weight: 600;
    color: #333;
    font-size: 1.05rem;
    margin-bottom: 4px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.project-card-date {
    color: #888;
    font-size: 0.8rem;
}

.project-card-actions {
    display: flex;
    gap: 6px;
    flex-shrink: 0;
    margin-left: 12px;
}

.project-empty {
    text-align: center;
    color: #999;
    padding: 40px 20px;
    font-size: 1rem;
}

/* ── Share Modal ── */
.share-link-row {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 12px;
    background: #f8f9ff;
    border-radius: 8px;
    margin-bottom: 8px;
    font-size: 0.82rem;
}

.share-link-url {
    flex: 1;
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    color: #555;
    font-family: monospace;
}

.share-link-badge {
    padding: 3px 8px;
    border-radius: 10px;
    font-size: 0.72rem;
    font-weight: 600;
    text-transform: uppercase;
    flex-shrink: 0;
}

.share-link-badge.readonly {
    background: #e0f2fe;
    color: #0369a1;
}

.share-link-badge.contributor {
    background: #dcfce7;
    color: #15803d;
}

/* ── Live Mode ── */
#liveModeContainer {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 1000;
    flex-direction: column;
    background: #1e1e2e;
}

#liveModeContainer.active {
    display: flex;
}

.live-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 20px;
    background: #12121f;
    border-bottom: 1px solid #333;
    flex-shrink: 0;
    gap: 16px;
}

.live-header-title {
    font-size: 1rem;
    font-weight: 700;
    color: #f5f5f5;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    min-width: 0;
}

.live-status {
    font-size: 0.82rem;
    padding: 4px 12px;
    border-radius: 12px;
    font-weight: 600;
    transition: background 0.2s, color 0.2s;
    flex-shrink: 0;
}

.live-status.ready    { background: #1a3a2a; color: #4ade80; }
.live-status.compiling{ background: #2a2a1a; color: #facc15; }
.live-status.error    { background: #3a1a1a; color: #f87171; }
.live-status.saved    { background: #1a2a3a; color: #60a5fa; }

.live-header-actions {
    display: flex;
    gap: 8px;
    align-items: center;
    flex-shrink: 0;
}

.btn-exit {
    background: transparent;
    color: #aaa;
    border: 1px solid #444;
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    white-space: nowrap;
}

.btn-exit:hover {
    background: #333;
    color: #fff;
    border-color: #666;
}

.btn-render-now {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    white-space: nowrap;
}

.btn-render-now:hover {
    opacity: 0.85;
}

.btn-save {
    background: #28a745;
    color: white;
    border: none;
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    white-space: nowrap;
}

.btn-save:hover { opacity: 0.85; }

.live-body {
    display: flex;
    flex: 1;
    overflow: hidden;
}

.live-editor-panel {
    display: flex;
    flex-direction: column;
    min-width: 100px;
    flex: 0 0 50%;
    position: relative;
}

.live-divider {
    width: 6px;
    cursor: col-resize;
    background: #2a2a3a;
    border-left: 1px solid #333;
    border-right: 1px solid #333;
    flex-shrink: 0;
    transition: background 0.15s;
}

.live-divider:hover,
.live-divider.dragging {
    background: #667eea;
}

.live-panel-label {
    padding: 6px 14px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: #666;
    background: #16162a;
    border-bottom: 1px solid #2a2a3a;
    flex-shrink: 0;
}

/* ── PDF Toolbar (Overleaf-style) ── */
.pdf-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 4px 8px;
    background: #16162a;
    border-bottom: 1px solid #2a2a3a;
    flex-shrink: 0;
    gap: 8px;
    min-height: 34px;
}

.pdf-toolbar-group {
    display: flex;
    align-items: center;
    gap: 2px;
}

.pdf-toolbar-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    color: #aab;
    border: none;
    padding: 5px 7px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.78rem;
    font-weight: 500;
    transition: background 0.15s, color 0.15s;
    line-height: 1;
}

.pdf-toolbar-btn:hover {
    background: #2a2a4a;
    color: #dde;
}

.pdf-toolbar-btn:active {
    background: #3a3a5a;
}

.pdf-toolbar-btn-recompile {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    padding: 5px 14px;
    border-radius: 4px;
    font-weight: 600;
    font-size: 0.78rem;
}

.pdf-toolbar-btn-recompile:hover {
    opacity: 0.85;
    color: #fff;
}

.pdf-toolbar-separator {
    width: 1px;
    height: 18px;
    background: #333;
    margin: 0 4px;
}

.pdf-toolbar-page-info,
.pdf-toolbar-zoom-info {
    color: #888;
    font-size: 0.72rem;
    font-variant-numeric: tabular-nums;
    min-width: 42px;
    text-align: center;
    user-select: none;
}

.pdf-toolbar-zoom-info {
    min-width: 38px;
}

.pdf-dark-mode #pdfViewerContainer canvas {
    filter: invert(1) hue-rotate(180deg);
}

.pdf-dark-mode #pdfViewerContainer {
    background: #333;
}

.pdf-dark-mode .pdf-toolbar-btn#pdfDarkModeBtn {
    color: #facc15;
}

#liveEditor {
    display: none; /* hidden; CodeMirror takes over */
}

/* ── CodeMirror dark theme (Catppuccin-inspired) ── */
.cm-editor-wrap {
    flex: 1;
    overflow: hidden;
    position: relative;
}

.cm-editor-wrap .CodeMirror {
    height: 100%;
    background: #1e1e2e;
    color: #cdd6f4;
    font-family: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', 'Consolas', monospace;
    font-size: 14px;
    line-height: 1.6;
}

.cm-editor-wrap .CodeMirror-gutters {
    background: #181828;
    border-right: 1px solid #2a2a3a;
}

.cm-editor-wrap .CodeMirror-linenumber {
    color: #555;
}

.cm-editor-wrap .CodeMirror-cursor {
    border-left-color: #cdd6f4;
}

.cm-editor-wrap .CodeMirror-selected,
.cm-editor-wrap .CodeMirror-focused .CodeMirror-selected {
    background: #334;
}

.cm-editor-wrap .CodeMirror-activeline-background {
    background: #232336;
}

.cm-editor-wrap .CodeMirror-matchingbracket {
    color: #f5c518 !important;
    text-decoration: underline;
}

/* LaTeX syntax highlighting */
.cm-editor-wrap .cm-keyword   { color: #cba6f7; }
.cm-editor-wrap .cm-tag        { color: #cba6f7; }
.cm-editor-wrap .cm-bracket    { color: #f9e2af; }
.cm-editor-wrap .cm-atom       { color: #fab387; }
.cm-editor-wrap .cm-number     { color: #fab387; }
.cm-editor-wrap .cm-builtin    { color: #89b4fa; }
.cm-editor-wrap .cm-string     { color: #a6e3a1; }
.cm-editor-wrap .cm-comment    { color: #6c7086; font-style: italic; }
.cm-editor-wrap .cm-variable   { color: #cdd6f4; }
.cm-editor-wrap .cm-variable-2 { color: #89dceb; }
.cm-editor-wrap .cm-def        { color: #f38ba8; }
.cm-editor-wrap .cm-error      { color: #f38ba8; }

/* ScrollBar styling inside CodeMirror */
.cm-editor-wrap .CodeMirror-vscrollbar,
.cm-editor-wrap .CodeMirror-hscrollbar {
    outline: none;
}

.live-pdf-panel {
    flex: 1 1 0%;
    display: flex;
    flex-direction: column;
    min-width: 100px;
    background: #252535;
    position: relative;
}

#pdfViewerContainer {
    flex: 1;
    overflow: auto;
    background: #525659;
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    cursor: grab;
}

#pdfViewerContainer:active {
    cursor: grabbing;
}

.pdf-page-wrapper {
    position: relative;
    margin: 8px auto;
    box-shadow: 0 2px 8px rgba(0,0,0,0.3);
    line-height: 0;
    /* Match typical PDF page; avoids gray #525659 from #pdfViewerContainer showing through gaps */
    background: #fff;
    overflow: hidden;
}

.pdf-page-wrapper canvas {
    display: block;
    vertical-align: top;
    background: #fff;
}

.synctex-highlight {
    position: absolute;
    left: 0;
    right: 0;
    height: 20px;
    background: rgba(255, 230, 0, 0.35);
    pointer-events: none;
    transition: opacity 0.8s ease;
    border-left: 3px solid #f5c518;
}

.live-pdf-placeholder {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: #555;
    gap: 12px;
    font-size: 1rem;
}

.live-pdf-placeholder span:first-child {
    font-size: 3rem;
}

.pdf-loading-overlay {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: rgba(37, 37, 53, 0.92);
    z-index: 10;
    gap: 16px;
}

.pdf-loading-spinner {
    width: 36px;
    height: 36px;
    border: 3px solid rgba(102, 126, 234, 0.2);
    border-top-color: #667eea;
    border-radius: 50%;
    animation: pdf-spin 0.8s linear infinite;
}

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

.pdf-loading-text {
    color: #aaa;
    font-size: 0.85rem;
}

.pdf-render-progress {
    position: absolute;
    top: 0; left: 0; right: 0;
    z-index: 10;
    padding: 12px 16px;
    background: rgba(37, 37, 53, 0.95);
    border-bottom: 1px solid rgba(102, 126, 234, 0.3);
}

.pdf-render-progress-bar {
    height: 4px;
    background: rgba(102, 126, 234, 0.15);
    border-radius: 2px;
    overflow: hidden;
    margin-bottom: 8px;
}

.pdf-render-progress-fill {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, #667eea, #764ba2);
    border-radius: 2px;
    transition: width 0.3s ease;
}

.pdf-render-progress-label {
    display: flex;
    justify-content: space-between;
    color: #aaa;
    font-size: 0.75rem;
}

.live-error-panel {
    flex: 1;
    overflow: auto;
    padding: 20px;
    color: #f87171;
    font-family: monospace;
    font-size: 0.8rem;
    line-height: 1.5;
    white-space: pre-wrap;
    background: #1a0a0a;
}

/* ── File Tree Panel ── */
.live-file-tree {
    width: 220px;
    min-width: 140px;
    max-width: 400px;
    background: #16162a;
    display: flex;
    flex-direction: column;
    border-right: 1px solid #2a2a3a;
    flex-shrink: 0;
}

.file-tree-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 12px;
    border-bottom: 1px solid #2a2a3a;
    gap: 4px;
}

.file-tree-title {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: #666;
    flex: 1;
}

.file-tree-actions {
    display: flex;
    gap: 2px;
}

.file-tree-action {
    background: transparent;
    border: 1px solid #333;
    color: #888;
    width: 26px;
    height: 26px;
    border-radius: 6px;
    font-size: 0.85rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.15s;
    padding: 0;
}

.file-tree-action:hover {
    background: #2a2a3a;
    color: #ccc;
    border-color: #555;
}

.file-tree-list {
    list-style: none;
    overflow-y: auto;
    flex: 1;
    padding: 4px 0;
}

.file-tree-item {
    display: flex;
    align-items: center;
    padding: 6px 12px;
    cursor: pointer;
    color: #aaa;
    font-size: 0.82rem;
    font-family: 'JetBrains Mono', 'Fira Code', monospace;
    transition: background 0.1s;
    gap: 6px;
    position: relative;
}

.file-tree-item:hover {
    background: #1e1e35;
    color: #ccc;
}

.file-tree-item.active {
    background: #252545;
    color: #f5f5f5;
    border-left: 2px solid #667eea;
    padding-left: 10px;
}

.file-tree-item.main-file .file-tree-icon::after {
    content: '';
    position: absolute;
    width: 4px;
    height: 4px;
    background: #4ade80;
    border-radius: 50%;
    top: 2px;
    right: -2px;
}

.file-tree-folder {
    user-select: none;
}

.file-tree-folder-header {
    display: flex;
    align-items: center;
    padding: 6px 12px;
    cursor: pointer;
    color: #ccc;
    font-size: 0.82rem;
    font-family: 'JetBrains Mono', 'Fira Code', monospace;
    gap: 6px;
    transition: background 0.1s;
}

.file-tree-folder-header:hover {
    background: #1e1e35;
}

.file-tree-folder-arrow {
    font-size: 0.6rem;
    transition: transform 0.15s;
    width: 10px;
    text-align: center;
    flex-shrink: 0;
    color: #888;
}

.file-tree-folder.collapsed .file-tree-folder-arrow {
    transform: rotate(-90deg);
}

.file-tree-folder.collapsed .file-tree-folder-children {
    display: none;
}

.file-tree-folder-name {
    font-weight: 600;
    color: #bbb;
}

.file-tree-folder-children {
    list-style: none;
    padding: 0;
    margin: 0;
}

.file-tree-icon {
    font-size: 0.9rem;
    flex-shrink: 0;
    position: relative;
}

.file-tree-name {
    flex: 1;
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.file-tree-item-actions {
    display: none;
    gap: 2px;
}

.file-tree-item:hover .file-tree-item-actions {
    display: flex;
}

.file-tree-item-btn {
    background: transparent;
    border: none;
    color: #666;
    cursor: pointer;
    font-size: 0.75rem;
    padding: 2px 4px;
    border-radius: 3px;
}

.file-tree-item-btn:hover {
    background: #333;
    color: #f87171;
}

.file-tree-rename-input {
    background: #1e1e2e;
    border: 1px solid #667eea;
    color: #cdd6f4;
    font-family: 'JetBrains Mono', 'Fira Code', monospace;
    font-size: 0.82rem;
    padding: 2px 4px;
    border-radius: 3px;
    outline: none;
    flex: 1;
    min-width: 0;
}

.file-tree-new-input {
    margin: 4px 8px;
    background: #1e1e2e;
    border: 1px solid #667eea;
    color: #cdd6f4;
    font-family: 'JetBrains Mono', 'Fira Code', monospace;
    font-size: 0.82rem;
    padding: 6px 8px;
    border-radius: 4px;
    outline: none;
    width: calc(100% - 16px);
}

/* context menu */
.file-context-menu {
    position: fixed;
    z-index: 3000;
    background: #1e1e2e;
    border: 1px solid #333;
    border-radius: 8px;
    padding: 4px 0;
    min-width: 160px;
    box-shadow: 0 8px 24px rgba(0,0,0,0.4);
    display: none;
}

.file-context-menu.active {
    display: block;
}

.file-context-item {
    padding: 8px 16px;
    color: #ccc;
    font-size: 0.82rem;
    cursor: pointer;
    transition: background 0.1s;
}

.file-context-item:hover {
    background: #252545;
}

.file-context-item.danger {
    color: #f87171;
}

.file-context-item.danger:hover {
    background: #3a1a1a;
}

/* ── Editable Title ── */
.live-header-title.editable {
    cursor: pointer;
}

.live-header-title.editable:hover {
    text-decoration: underline;
    text-decoration-style: dashed;
    text-underline-offset: 4px;
    text-decoration-color: #555;
}

.live-header-title-input {
    font-size: 1rem;
    font-weight: 700;
    color: #f5f5f5;
    background: transparent;
    border: none;
    border-bottom: 2px solid #667eea;
    outline: none;
    font-family: inherit;
    padding: 0 0 2px 0;
    min-width: 100px;
    max-width: 400px;
}

/* ── Tree Divider ── */
.live-tree-divider {
    width: 4px;
    cursor: col-resize;
    background: #2a2a3a;
    flex-shrink: 0;
    transition: background 0.15s;
}

.live-tree-divider:hover,
.live-tree-divider.dragging {
    background: #667eea;
}