/**
 * MDx Code — Workspace UI (S96)
 * Three-panel layout, file tree, diff viewer, timeline, keyboard shortcuts.
 */

/* ===== Design tokens (match MDx Code dark theme) ===== */
:root {
    --ws-bg-primary: #0d0d1a;
    --ws-bg-card: #1a1a2e;
    --ws-bg-panel: #111113;
    --ws-bg-hover: #1a1a1e;
    --ws-accent: #4285F4;
    --ws-text-primary: #e0e0e0;
    --ws-text-secondary: #888;
    --ws-text-dim: #52525b;
    --ws-success: #34d399;
    --ws-warning: #fbbf24;
    --ws-error: #ef4444;
    --ws-border: #1a1a1e;
    --ws-sidebar-w: 260px;
    --ws-right-panel-w: 380px;
    --ws-transition: .2s ease;
}

/* ===== Three-panel layout ===== */
.workspace-layout {
    display: flex;
    flex: 1;
    overflow: hidden;
    min-height: 0;
}

.workspace-sidebar {
    width: var(--ws-sidebar-w);
    min-width: 0;
    background: var(--ws-bg-panel);
    border-right: 1px solid var(--ws-border);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transition: width var(--ws-transition), min-width var(--ws-transition);
}
.workspace-sidebar.collapsed {
    width: 0;
    min-width: 0;
    border-right: none;
    overflow: hidden;
}

.workspace-center {
    flex: 1;
    min-width: 320px;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.workspace-right-panel {
    width: var(--ws-right-panel-w);
    min-width: 0;
    background: var(--ws-bg-panel);
    border-left: 1px solid var(--ws-border);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transition: width var(--ws-transition), min-width var(--ws-transition);
}
.workspace-right-panel.collapsed {
    width: 0;
    min-width: 0;
    border-left: none;
    overflow: hidden;
}

/* ===== Panel headers ===== */
.ws-panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 12px;
    border-bottom: 1px solid var(--ws-border);
    font-size: .72rem;
    font-weight: 600;
    color: var(--ws-text-secondary);
    text-transform: uppercase;
    letter-spacing: .05em;
    flex-shrink: 0;
}
.ws-panel-header button {
    background: none;
    border: none;
    color: var(--ws-text-dim);
    cursor: pointer;
    font-size: .7rem;
    padding: 2px 6px;
    border-radius: 3px;
}
.ws-panel-header button:hover {
    background: var(--ws-bg-hover);
    color: var(--ws-text-primary);
}

/* ===== File tree ===== */
.file-tree {
    flex: 1;
    overflow-y: auto;
    padding: 4px 0;
}
.file-tree-search {
    padding: 6px 10px;
    border-bottom: 1px solid var(--ws-border);
}
.file-tree-search input {
    width: 100%;
    background: var(--ws-bg-primary);
    border: 1px solid var(--ws-border);
    border-radius: 4px;
    padding: 5px 8px;
    color: var(--ws-text-primary);
    font-size: .72rem;
    font-family: 'JetBrains Mono', monospace;
    outline: none;
}
.file-tree-search input:focus {
    border-color: var(--ws-accent);
}

.ft-node {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 3px 8px 3px 0;
    cursor: pointer;
    font-size: .72rem;
    font-family: 'JetBrains Mono', monospace;
    color: var(--ws-text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    user-select: none;
}
.ft-node:hover {
    background: var(--ws-bg-hover);
}
.ft-node-icon {
    width: 16px;
    text-align: center;
    flex-shrink: 0;
    color: var(--ws-text-dim);
    font-size: .65rem;
}
.ft-node-icon.dir { color: var(--ws-accent); }
.ft-node-name { flex: 1; overflow: hidden; text-overflow: ellipsis; }
.ft-node-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--ws-warning);
    flex-shrink: 0;
    margin-left: auto;
}
.ft-children {
    padding-left: 14px;
}

/* ===== Timeline ===== */
.timeline-container {
    flex: 1;
    overflow-y: auto;
    padding: 8px 12px;
}
.tl-event {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    padding: 6px 0;
    font-size: .72rem;
    border-bottom: 1px solid rgba(255,255,255,.03);
}
.tl-event:last-child { border-bottom: none; }
.tl-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    margin-top: 3px;
    flex-shrink: 0;
}
.tl-dot.file_read { background: var(--ws-accent); }
.tl-dot.file_write { background: var(--ws-success); }
.tl-dot.file_list { background: var(--ws-text-dim); }
.tl-dot.shell_exec { background: #818cf8; }
.tl-dot.code_search { background: #c084fc; }
.tl-dot.approval { background: var(--ws-success); }
.tl-dot.rejection { background: var(--ws-error); }
.tl-dot.system { background: var(--ws-text-dim); }
.tl-dot.pending {
    background: var(--ws-warning);
    animation: pulse-dot 1.5s ease-in-out infinite;
}
@keyframes pulse-dot {
    0%, 100% { opacity: 1; }
    50% { opacity: .4; }
}
.tl-body { flex: 1; min-width: 0; }
.tl-desc {
    color: var(--ws-text-primary);
    word-break: break-word;
}
.tl-time {
    color: var(--ws-text-dim);
    font-size: .65rem;
    margin-top: 2px;
}
.tl-actions {
    display: flex;
    gap: 4px;
    margin-top: 4px;
}
.tl-btn-approve, .tl-btn-reject {
    padding: 2px 8px;
    border-radius: 3px;
    border: none;
    font-size: .65rem;
    cursor: pointer;
}
.tl-btn-approve { background: var(--ws-success); color: #000; }
.tl-btn-reject { background: transparent; color: var(--ws-error); border: 1px solid var(--ws-error); }

/* ===== Diff viewer ===== */
.diff-viewer {
    flex: 1;
    overflow-y: auto;
    padding: 0;
}
.diff-empty {
    padding: 24px;
    text-align: center;
    color: var(--ws-text-dim);
    font-size: .78rem;
}
.diff-block {
    margin: 0;
    border-bottom: 1px solid var(--ws-border);
}
.diff-file-header {
    padding: 8px 12px;
    background: rgba(66,133,244,.08);
    font-family: 'JetBrains Mono', monospace;
    font-size: .72rem;
    color: var(--ws-accent);
    font-weight: 600;
    position: sticky;
    top: 0;
    z-index: 1;
}
.diff-content {
    padding: 0;
    font-family: 'JetBrains Mono', monospace;
    font-size: .68rem;
    line-height: 1.7;
    white-space: pre-wrap;
    word-break: break-word;
}
.diff-line {
    padding: 0 12px;
    min-height: 1.7em;
}
.diff-line.add {
    background: rgba(52,211,153,.08);
    color: var(--ws-success);
}
.diff-line.del {
    background: rgba(239,68,68,.08);
    color: var(--ws-error);
}
.diff-line.hunk {
    background: rgba(129,140,248,.06);
    color: #818cf8;
    font-style: italic;
}
.diff-line-number {
    display: inline-block;
    width: 40px;
    text-align: right;
    padding-right: 8px;
    color: var(--ws-text-dim);
    user-select: none;
}
.diff-actions {
    display: flex;
    gap: 8px;
    padding: 10px 12px;
    border-top: 1px solid var(--ws-border);
    background: var(--ws-bg-panel);
}
.diff-btn-approve {
    padding: 6px 16px;
    background: var(--ws-success);
    color: #0a0a0b;
    border: none;
    border-radius: 5px;
    font-size: .72rem;
    font-weight: 600;
    cursor: pointer;
}
.diff-btn-approve:hover { filter: brightness(1.1); }
.diff-btn-approve:disabled { opacity: .5; cursor: not-allowed; }
.diff-btn-reject {
    padding: 6px 16px;
    background: transparent;
    color: var(--ws-error);
    border: 1px solid var(--ws-error);
    border-radius: 5px;
    font-size: .72rem;
    cursor: pointer;
}
.diff-btn-reject:hover { background: rgba(239,68,68,.1); }
.diff-btn-reject:disabled { opacity: .5; cursor: not-allowed; }

/* ===== Resource bar ===== */
.resource-bar {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 4px 12px;
    font-size: .65rem;
    font-family: 'JetBrains Mono', monospace;
    color: var(--ws-text-dim);
    border-top: 1px solid var(--ws-border);
    background: var(--ws-bg-panel);
    flex-shrink: 0;
}

/* ===== Keyboard shortcut hints ===== */
.shortcut-hints {
    position: fixed;
    bottom: 16px;
    right: 16px;
    background: rgba(17,17,19,.92);
    border: 1px solid var(--ws-border);
    border-radius: 8px;
    padding: 10px 14px;
    font-size: .68rem;
    font-family: 'JetBrains Mono', monospace;
    color: var(--ws-text-secondary);
    z-index: 100;
    max-width: 260px;
    backdrop-filter: blur(8px);
}
.shortcut-hints.hidden { display: none; }
.shortcut-hints-close {
    position: absolute;
    top: 4px;
    right: 6px;
    background: none;
    border: none;
    color: var(--ws-text-dim);
    cursor: pointer;
    font-size: .72rem;
}
.shortcut-row {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    padding: 2px 0;
}
.shortcut-key {
    color: var(--ws-accent);
    white-space: nowrap;
}

/* ===== Template picker ===== */
.template-picker {
    margin-top: 12px;
}
.template-picker select {
    width: 100%;
}

/* ===== Responsive ===== */
@media (max-width: 1200px) {
    .workspace-sidebar {
        width: 0;
        min-width: 0;
        border-right: none;
        overflow: hidden;
    }
    .workspace-sidebar.open {
        width: var(--ws-sidebar-w);
        border-right: 1px solid var(--ws-border);
    }
}
@media (max-width: 768px) {
    .workspace-sidebar,
    .workspace-right-panel {
        width: 0;
        min-width: 0;
        border: none;
        overflow: hidden;
    }
    .workspace-sidebar.open {
        position: absolute;
        left: 0;
        top: 0;
        bottom: 0;
        width: 260px;
        z-index: 50;
        border-right: 1px solid var(--ws-border);
    }
    .workspace-right-panel.open {
        position: absolute;
        right: 0;
        top: 0;
        bottom: 0;
        width: 100%;
        z-index: 50;
    }
    .shortcut-hints { display: none; }
}