/* ========================================================================
   Alphabet IDE — Tokyo Night–inspired premium theme
   ======================================================================== */

:root {
    /* Tokyo Night palette */
    --bg-darkest:   #13141c;
    --bg-dark:      #16171f;
    --bg-sidebar:   #1a1b26;
    --bg-panel:     #1e2030;
    --bg-editor:    #1a1b26;
    --bg-hover:     #24283b;
    --bg-active:    #292e42;
    --bg-input:     #1a1b26;
    --border:       #2f3549;
    --border-light: #3b4261;

    /* Text */
    --text-primary:   #c0caf5;
    --text-secondary: #7982a9;
    --text-muted:     #565f89;
    --text-accent:    #7aa2f7;

    /* Accent colors */
    --accent:      #7aa2f7;
    --accent-dim:  #3d59a1;
    --green:       #9ece6a;
    --yellow:      #e0af68;
    --red:         #f7768e;
    --magenta:     #bb9af7;
    --cyan:        #7dcfff;
    --orange:      #ff9e64;

    /* Sizes */
    --titlebar-h:   36px;
    --activity-w:   48px;
    --sidebar-w:    260px;
    --chat-w:       320px;
    --statusbar-h:  24px;
    --tab-h:        36px;
    --panel-tabs-h: 32px;
    --zoom:         1;

    /* Fonts */
    --font-ui:   'Inter', -apple-system, sans-serif;
    --font-code: 'JetBrains Mono', 'Fira Code', monospace;

    /* Transitions */
    --transition: 150ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* Light theme */
[data-theme="light"] {
    --bg-darkest:   #f5f5f7;
    --bg-dark:      #ffffff;
    --bg-sidebar:   #f0f0f3;
    --bg-panel:     #fafafa;
    --bg-editor:    #ffffff;
    --bg-hover:     #e8e8ed;
    --bg-active:    #dddee3;
    --bg-input:     #f0f0f3;
    --border:       #d1d1d6;
    --border-light: #c7c7cc;
    --text-primary: #1d1d1f;
    --text-secondary: #6e6e73;
    --text-muted:   #aeaeb2;
    --text-accent:  #0071e3;
    --accent:       #0071e3;
    --accent-dim:   #cce0ff;
    --green:        #34c759;
    --yellow:       #ff9f0a;
    --red:          #ff3b30;
    --magenta:      #af52de;
    --cyan:         #5ac8fa;
    --orange:       #ff9500;
}

/* ========================================================================
   Reset & Base
   ======================================================================== */

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

html, body {
    width: 100%;
    height: 100%;
    overflow: hidden;
    font-family: var(--font-ui);
    font-size: calc(13px * var(--zoom));
    background: var(--bg-darkest);
    color: var(--text-primary);
    -webkit-font-smoothing: antialiased;
    user-select: none;
}

::selection {
    background: var(--accent-dim);
}

::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}
::-webkit-scrollbar-track {
    background: transparent;
}
::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--border-light);
}

/* ========================================================================
   Title Bar
   ======================================================================== */

.titlebar {
    height: var(--titlebar-h);
    background: var(--bg-dark);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 8px;
    z-index: 100;
    -webkit-app-region: drag;
}

.titlebar-left, .titlebar-right, .titlebar-center {
    display: flex;
    align-items: center;
    gap: 4px;
    -webkit-app-region: no-drag;
}

.logo {
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent);
    margin-right: 4px;
}

.menu-bar {
    display: flex;
    gap: 2px;
}

.menu-item {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-family: var(--font-ui);
    font-size: 12.5px;
    padding: 4px 10px;
    border-radius: 4px;
    cursor: pointer;
    transition: all var(--transition);
}
.menu-item:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.window-title {
    background: var(--bg-panel);
    border: 1px solid var(--border);
    color: var(--text-muted);
    font-family: var(--font-ui);
    font-size: 12px;
    padding: 3px 14px;
    border-radius: 6px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 6px;
    min-width: 240px;
    justify-content: center;
    transition: all var(--transition);
}
.window-title:hover {
    border-color: var(--accent);
    color: var(--text-secondary);
}

.titlebar-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    transition: all var(--transition);
}
.titlebar-btn:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.zoom-level {
    font-size: 11px;
    color: var(--text-muted);
    min-width: 36px;
    text-align: center;
}

/* ========================================================================
   Main Layout
   ======================================================================== */

.main-container {
    display: flex;
    height: calc(100vh - var(--titlebar-h) - var(--statusbar-h));
    overflow: hidden;
}

/* ========================================================================
   Activity Bar
   ======================================================================== */

.activity-bar {
    width: var(--activity-w);
    background: var(--bg-darkest);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 4px 0;
    gap: 2px;
}

.activity-btn {
    width: 40px;
    height: 40px;
    background: none;
    border: none;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 6px;
    cursor: pointer;
    transition: all var(--transition);
    position: relative;
}
.activity-btn:hover {
    color: var(--text-primary);
}
.activity-btn.active {
    color: var(--text-primary);
}
.activity-btn.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 8px;
    bottom: 8px;
    width: 2px;
    background: var(--accent);
    border-radius: 1px;
}

.activity-spacer {
    flex: 1;
}

/* ========================================================================
   Sidebar
   ======================================================================== */

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

.sidebar-panel {
    display: none;
    flex-direction: column;
    height: 100%;
}
.sidebar-panel.active {
    display: flex;
}

.panel-header {
    height: 36px;
    padding: 0 12px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.8px;
    color: var(--text-secondary);
    text-transform: uppercase;
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
}

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

.icon-btn {
    width: 24px;
    height: 24px;
    background: none;
    border: none;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
    cursor: pointer;
    transition: all var(--transition);
}
.icon-btn:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

/* File Tree */
.file-tree {
    flex: 1;
    overflow-y: auto;
    padding: 4px 0;
}

.file-item {
    display: flex;
    align-items: center;
    padding: 4px 12px;
    padding-left: 16px;
    cursor: pointer;
    color: var(--text-secondary);
    font-size: 13px;
    gap: 6px;
    transition: all var(--transition);
    border-left: 2px solid transparent;
}
.file-item:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}
.file-item.active {
    background: var(--bg-active);
    color: var(--text-primary);
    border-left-color: var(--accent);
}

.file-icon {
    width: 16px;
    height: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    flex-shrink: 0;
}
.file-icon.abc { color: var(--magenta); }
.file-icon.js  { color: var(--yellow); }
.file-icon.html { color: var(--orange); }
.file-icon.css  { color: var(--cyan); }
.file-icon.json { color: var(--green); }
.file-icon.other { color: var(--text-muted); }

.file-actions {
    display: none;
    margin-left: auto;
    gap: 2px;
}
.file-item:hover .file-actions {
    display: flex;
}

/* Search */
.search-container {
    padding: 8px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.search-input-wrap {
    display: flex;
    gap: 4px;
}
.search-input-wrap input {
    flex: 1;
    background: var(--bg-input);
    border: 1px solid var(--border);
    color: var(--text-primary);
    font-family: var(--font-ui);
    font-size: 12px;
    padding: 6px 8px;
    border-radius: 4px;
    outline: none;
    transition: border-color var(--transition);
}
.search-input-wrap input:focus {
    border-color: var(--accent);
}

.search-results {
    flex: 1;
    overflow-y: auto;
}
.search-result-item {
    padding: 4px 8px;
    font-size: 12px;
    color: var(--text-secondary);
    cursor: pointer;
    border-radius: 4px;
    display: flex;
    gap: 8px;
    align-items: baseline;
}
.search-result-item:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}
.search-line-num {
    color: var(--text-muted);
    min-width: 24px;
    text-align: right;
    font-size: 11px;
    flex-shrink: 0;
}
.search-line-text {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-family: var(--font-mono);
    font-size: 12px;
}
.search-options {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 4px 8px;
    border-bottom: 1px solid var(--border);
}
.search-option {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 11px;
    color: var(--text-muted);
    cursor: pointer;
}
.search-option select {
    background: var(--bg-panel);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    font-size: 11px;
    padding: 2px 4px;
    border-radius: 3px;
    font-family: var(--font-ui);
}
.search-option input[type="checkbox"] {
    margin: 0;
}
.search-option span {
    font-weight: 500;
}
.search-summary {
    padding: 4px 8px;
    font-size: 11px;
    color: var(--text-muted);
    border-bottom: 1px solid var(--border);
}
.search-file-group {
    margin-bottom: 2px;
}
.search-file-header {
    padding: 4px 8px;
    font-size: 12px;
    color: var(--text-primary);
    cursor: pointer;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 4px;
}
.search-file-header:hover {
    background: var(--bg-hover);
}
.search-file-count {
    color: var(--text-muted);
    font-size: 11px;
    font-weight: 400;
}
.search-file-results {
    padding-left: 16px;
}
.search-more {
    padding: 2px 8px;
    font-size: 11px;
    color: var(--text-muted);
    font-style: italic;
}
.search-truncated {
    padding: 4px 8px;
    font-size: 11px;
    color: var(--text-muted);
    border-top: 1px solid var(--border);
}
#searchRegexpToggle.active {
    color: var(--accent);
    font-weight: 700;
}

/* Run Panel */
.run-container {
    padding: 12px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.run-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 14px;
    background: var(--bg-panel);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    font-family: var(--font-ui);
    font-size: 12.5px;
    border-radius: 6px;
    cursor: pointer;
    transition: all var(--transition);
}
.run-btn:hover {
    background: var(--bg-hover);
    border-color: var(--border-light);
    color: var(--text-primary);
}
.run-btn.primary {
    background: var(--accent);
    border-color: var(--accent);
    color: #fff;
}
.run-btn.primary:hover {
    filter: brightness(1.1);
}

.run-config {
    padding-top: 8px;
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 12px;
    color: var(--text-secondary);
}
.run-config select {
    flex: 1;
    background: var(--bg-input);
    border: 1px solid var(--border);
    color: var(--text-primary);
    font-family: var(--font-ui);
    font-size: 12px;
    padding: 4px 8px;
    border-radius: 4px;
    outline: none;
}

/* ========================================================================
   Find & Replace Bar
   ======================================================================== */

.find-replace-bar {
    position: absolute;
    top: 0;
    right: 0;
    background: var(--bg-panel);
    border: 1px solid var(--border);
    border-top: none;
    border-right: none;
    border-radius: 0 0 0 6px;
    padding: 6px 8px;
    z-index: 50;
    display: none;
    flex-direction: column;
    gap: 4px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.3);
    min-width: 360px;
}
.find-replace-bar.visible {
    display: flex;
}

.find-row {
    display: flex;
    align-items: center;
    gap: 4px;
}

.find-input {
    flex: 1;
    background: var(--bg-input);
    border: 1px solid var(--border);
    color: var(--text-primary);
    font-family: var(--font-code);
    font-size: 12px;
    padding: 4px 8px;
    border-radius: 4px;
    outline: none;
}
.find-input:focus {
    border-color: var(--accent);
}

.find-btn {
    width: 24px;
    height: 24px;
    background: var(--bg-hover);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    border-radius: 4px;
    cursor: pointer;
    font-size: 11px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition);
}
.find-btn:hover {
    background: var(--bg-active);
    color: var(--text-primary);
    border-color: var(--border-light);
}
.find-btn.close {
    background: none;
    border: none;
    width: 20px;
    height: 20px;
}
.find-btn.close:hover {
    color: var(--red);
}

/* ========================================================================
   Breadcrumbs
   ======================================================================== */

.breadcrumbs {
    height: 22px;
    padding: 0 12px;
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 12px;
    color: var(--text-muted);
    background: var(--bg-editor);
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
    overflow: hidden;
}

.bc-segment {
    cursor: pointer;
    padding: 1px 4px;
    border-radius: 3px;
    white-space: nowrap;
}
.bc-segment:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.bc-separator {
    color: var(--text-muted);
    font-size: 10px;
}

/* ========================================================================
   Debug Toolbar
   ======================================================================== */

.debug-toolbar {
    display: flex;
    gap: 4px;
    padding: 8px 0;
    justify-content: center;
}

.debug-btn {
    width: 32px;
    height: 28px;
    background: var(--bg-panel);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    border-radius: 4px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition);
}
.debug-btn:hover:not(:disabled) {
    background: var(--bg-hover);
    border-color: var(--border-light);
    color: var(--text-primary);
}
.debug-btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

/* ========================================================================
   Breakpoint & Debug Line
   ======================================================================== */

.breakpoint-glyph {
    background: var(--red);
    border-radius: 50%;
    width: 10px !important;
    height: 10px !important;
    margin: 3px 0 0 5px !important;
}

.debug-arrow-glyph {
    color: var(--yellow);
    font-size: 14px;
}
.debug-arrow-glyph::before {
    content: '▶';
}

.debug-line-highlight {
    background: rgba(224, 175, 104, 0.08) !important;
    border-left: 2px solid var(--yellow);
}

/* ========================================================================
   Watch & Stack Panels
   ======================================================================== */

.debug-section {
    border-top: 1px solid var(--border);
}

.panel-subheader {
    height: 24px;
    padding: 0 12px;
    display: flex;
    align-items: center;
    font-size: 10px;
    font-weight: 600;
    letter-spacing: 0.8px;
    color: var(--text-muted);
    text-transform: uppercase;
    background: var(--bg-dark);
}

.watch-panel, .stack-panel {
    max-height: 150px;
    overflow-y: auto;
    padding: 4px 0;
}

.watch-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 3px 12px;
    font-size: 12px;
    font-family: var(--font-code);
}
.watch-name {
    color: var(--cyan);
    min-width: 80px;
}
.watch-type {
    color: var(--text-muted);
    font-size: 10px;
    min-width: 40px;
}
.watch-value {
    color: var(--text-primary);
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.watch-scope {
    color: var(--text-muted);
    font-size: 10px;
}

.stack-frame {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 3px 12px;
    font-size: 12px;
    cursor: pointer;
    border-left: 2px solid transparent;
}
.stack-frame:hover {
    background: var(--bg-hover);
}
.stack-frame.active {
    background: var(--bg-active);
    border-left-color: var(--accent);
}
.stack-name {
    color: var(--text-primary);
    font-family: var(--font-code);
}
.stack-loc {
    color: var(--text-muted);
    font-size: 11px;
}

/* ========================================================================
   Git Panel
   ======================================================================== */

.git-panel {
    flex: 1;
    overflow-y: auto;
    padding: 4px 0;
}

.git-branch {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 12px;
    font-size: 12px;
    color: var(--text-primary);
    font-weight: 500;
    border-bottom: 1px solid var(--border);
}

.git-refresh-btn {
    margin-left: auto;
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 16px;
    padding: 2px 6px;
    border-radius: 4px;
}
.git-refresh-btn:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.git-section {
    padding: 4px 12px;
}
.git-section-title {
    font-size: 10px;
    font-weight: 600;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    color: var(--text-muted);
}

.git-file {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 3px 12px;
    font-size: 12px;
    cursor: pointer;
    transition: background var(--transition);
}
.git-file:hover {
    background: var(--bg-hover);
}
.git-file-icon {
    font-size: 10px;
    width: 12px;
    text-align: center;
}
.git-file-name {
    color: var(--text-primary);
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.git-file-status {
    color: var(--text-muted);
    font-size: 10px;
}
.git-file-actions {
    display: none;
    gap: 2px;
}
.git-file:hover .git-file-actions {
    display: flex;
}

.git-stage-btn, .git-diff-btn {
    width: 20px;
    height: 20px;
    background: var(--bg-hover);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    border-radius: 3px;
    cursor: pointer;
    font-size: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
}
.git-stage-btn:hover, .git-diff-btn:hover {
    background: var(--bg-active);
    color: var(--text-primary);
}

.git-actions {
    padding: 8px 12px;
    display: flex;
    gap: 6px;
}

.git-btn {
    flex: 1;
    padding: 6px 10px;
    background: var(--bg-panel);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    font-family: var(--font-ui);
    font-size: 12px;
    border-radius: 4px;
    cursor: pointer;
    transition: all var(--transition);
}
.git-btn:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}
.git-btn.primary {
    background: var(--accent);
    border-color: var(--accent);
    color: #fff;
}

.git-commit {
    padding: 8px 12px;
    display: flex;
    flex-direction: column;
    gap: 6px;
    border-top: 1px solid var(--border);
}

.git-commit-input {
    background: var(--bg-input);
    border: 1px solid var(--border);
    color: var(--text-primary);
    font-family: var(--font-ui);
    font-size: 12px;
    padding: 6px 8px;
    border-radius: 4px;
    outline: none;
}
.git-commit-input:focus {
    border-color: var(--accent);
}

.git-log-entry {
    padding: 3px 12px;
    font-size: 11px;
    font-family: var(--font-code);
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* ========================================================================
   Diff View
   ======================================================================== */

.diff-panel {
    flex: 1;
    overflow: auto;
    font-family: var(--font-code);
    font-size: 12px;
}

.diff-header {
    padding: 6px 12px;
    background: var(--bg-dark);
    color: var(--text-primary);
    font-weight: 500;
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
}

.diff-body {
    padding: 0;
}

.diff-line {
    padding: 1px 12px;
    white-space: pre;
}
.diff-line.diff-add {
    background: rgba(158, 206, 106, 0.1);
    color: var(--green);
}
.diff-line.diff-del {
    background: rgba(247, 118, 142, 0.1);
    color: var(--red);
}
.diff-line.diff-hunk {
    background: rgba(122, 162, 247, 0.1);
    color: var(--accent);
}
.diff-line.diff-meta {
    color: var(--text-muted);
}

/* ========================================================================
   Outline Panel
   ======================================================================== */

.outline-panel {
    flex: 1;
    overflow-y: auto;
    padding: 4px 0;
}

.outline-item {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 3px 12px;
    font-size: 12px;
    cursor: pointer;
    transition: background var(--transition);
}
.outline-item:hover {
    background: var(--bg-hover);
}
.outline-item.child {
    padding-left: 28px;
}

.outline-icon {
    width: 14px;
    text-align: center;
    font-size: 12px;
    color: var(--text-muted);
}
.outline-name {
    color: var(--text-primary);
    font-family: var(--font-code);
}
.outline-detail {
    color: var(--text-muted);
    font-size: 11px;
    margin-left: auto;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    max-width: 100px;
}

.outline-children {
    border-left: 1px solid var(--border);
    margin-left: 20px;
}

/* ========================================================================
   Folder Tree
   ======================================================================== */

.folder-tree {
    flex: 1;
    overflow-y: auto;
    padding: 4px 0;
    border-top: 1px solid var(--border);
}

.tree-folder-header {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 3px 12px;
    font-size: 12px;
    cursor: pointer;
    color: var(--text-secondary);
    transition: background var(--transition);
}
.tree-folder-header:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.tree-toggle {
    width: 14px;
    text-align: center;
    font-size: 10px;
    color: var(--text-muted);
}

.tree-children {
    padding-left: 8px;
}

.tree-icon {
    font-size: 12px;
}
.tree-icon.folder {
    font-size: 13px;
}

.tree-name {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.tree-file {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 3px 12px;
    padding-left: 30px;
    font-size: 12px;
    cursor: pointer;
    color: var(--text-secondary);
    transition: background var(--transition);
}
.tree-file:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

/* ========================================================================
   Settings Modal
   ======================================================================== */

.settings-dialog {
    width: 420px;
}

.settings-grid {
    display: flex;
    flex-direction: column;
    gap: 12px;
    padding: 16px 0;
}

.setting-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}
.setting-item label {
    font-size: 13px;
    color: var(--text-secondary);
    min-width: 100px;
}
.setting-item input[type="number"],
.setting-item select {
    width: 120px;
    background: var(--bg-input);
    border: 1px solid var(--border);
    color: var(--text-primary);
    font-family: var(--font-ui);
    font-size: 12px;
    padding: 4px 8px;
    border-radius: 4px;
    outline: none;
}
.setting-item input[type="checkbox"] {
    width: 16px;
    height: 16px;
    accent-color: var(--accent);
}

/* ========================================================================
   Server Status
   ======================================================================== */

.server-dot {
    display: inline-block;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    margin-right: 4px;
}
.server-dot.connected {
    background: var(--green);
    box-shadow: 0 0 4px var(--green);
}
.server-dot.disconnected {
    background: var(--text-muted);
}

/* ========================================================================
   Split Editor
   ======================================================================== */

.editor-area {
    display: flex;
    flex-direction: column;
    flex: 1;
    min-width: 0;
}
.editor-area.split-horizontal {
    flex-direction: row;
}
.editor-area.split-vertical {
    flex-direction: column;
}

.split-container {
    flex: 1;
    border: 1px solid var(--border);
    display: none;
}
.split-container.visible {
    display: block;
}

/* ========================================================================
   Extensions */
.extensions-list {
    padding: 8px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}
.ext-card {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px;
    background: var(--bg-panel);
    border: 1px solid var(--border);
    border-radius: 8px;
    cursor: pointer;
    transition: all var(--transition);
}
.ext-card:hover {
    border-color: var(--border-light);
    background: var(--bg-hover);
}
.ext-icon { font-size: 20px; }
.ext-info { flex: 1; }
.ext-name { font-size: 12.5px; font-weight: 500; color: var(--text-primary); }
.ext-desc { font-size: 11px; color: var(--text-muted); }
.ext-badge {
    font-size: 10px;
    padding: 2px 6px;
    border-radius: 3px;
    font-weight: 500;
}
.ext-badge.installed {
    background: rgba(158, 206, 106, 0.15);
    color: var(--green);
}

/* ========================================================================
   Editor Area
   ======================================================================== */

.editor-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    background: var(--bg-editor);
}

/* Tab Bar */
.tab-bar {
    height: var(--tab-h);
    background: var(--bg-dark);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: stretch;
    overflow-x: auto;
    flex-shrink: 0;
}
.tab-bar::-webkit-scrollbar { height: 0; }

.tabs-container {
    display: flex;
    align-items: stretch;
}

.tab {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 0 14px;
    font-size: 12.5px;
    color: var(--text-muted);
    border-right: 1px solid var(--border);
    cursor: pointer;
    white-space: nowrap;
    transition: all var(--transition);
    position: relative;
    min-width: 0;
}
.tab:hover {
    color: var(--text-primary);
    background: var(--bg-hover);
}
.tab.active {
    color: var(--text-primary);
    background: var(--bg-editor);
}
.tab.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--accent);
}
.tab.modified .tab-name::after {
    content: ' ●';
    color: var(--text-muted);
}
.tab-close {
    width: 18px;
    height: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
    opacity: 0;
    transition: all var(--transition);
    flex-shrink: 0;
}
.tab:hover .tab-close,
.tab.active .tab-close {
    opacity: 1;
}
.tab-close:hover {
    background: var(--bg-active);
}

.tab-icon {
    width: 14px;
    height: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 11px;
    flex-shrink: 0;
}

/* Editor Container */
.editor-container {
    flex: 1;
    overflow: hidden;
    position: relative;
}

/* Welcome Screen */
.welcome-screen {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
    color: var(--text-muted);
    z-index: 10;
}
.welcome-logo {
    color: var(--accent);
    opacity: 0.6;
    margin-bottom: 8px;
}
.welcome-screen h1 {
    font-size: 28px;
    font-weight: 300;
    color: var(--text-primary);
    letter-spacing: -0.5px;
}
.welcome-screen p {
    font-size: 14px;
    margin-bottom: 16px;
}
.welcome-actions {
    display: flex;
    gap: 10px;
    margin-bottom: 24px;
}
.welcome-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    background: var(--bg-panel);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    font-family: var(--font-ui);
    font-size: 13px;
    border-radius: 8px;
    cursor: pointer;
    transition: all var(--transition);
}
.welcome-btn:hover {
    background: var(--bg-hover);
    border-color: var(--accent);
    color: var(--text-primary);
}

.welcome-shortcuts {
    display: flex;
    flex-direction: column;
    gap: 6px;
    font-size: 12px;
}
.shortcut-row {
    display: flex;
    align-items: center;
    gap: 6px;
    justify-content: center;
}
kbd {
    background: var(--bg-panel);
    border: 1px solid var(--border);
    padding: 1px 6px;
    border-radius: 3px;
    font-family: var(--font-ui);
    font-size: 11px;
    color: var(--text-secondary);
}

/* ========================================================================
   Bottom Panels
   ======================================================================== */

.bottom-panels {
    height: 200px;
    border-top: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    background: var(--bg-dark);
    transition: height var(--transition);
}
.bottom-panels.collapsed {
    height: 32px;
}

.panel-tabs {
    height: var(--panel-tabs-h);
    display: flex;
    align-items: center;
    padding: 0 8px;
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
    gap: 2px;
}

.panel-tab {
    background: none;
    border: none;
    color: var(--text-muted);
    font-family: var(--font-ui);
    font-size: 12px;
    padding: 4px 12px;
    border-radius: 4px;
    cursor: pointer;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 500;
    transition: all var(--transition);
}
.panel-tab:hover {
    color: var(--text-primary);
    background: var(--bg-hover);
}
.panel-tab.active {
    color: var(--text-primary);
    background: var(--bg-active);
}

.panel-tab-spacer {
    flex: 1;
}

.bottom-content {
    flex: 1;
    overflow: hidden;
    position: relative;
}

.bottom-panel {
    display: none;
    position: absolute;
    inset: 0;
}
.bottom-panel.active {
    display: flex;
    flex-direction: column;
}

/* Output */
.output-area {
    flex: 1;
    padding: 8px 12px;
    font-family: var(--font-code);
    font-size: 12px;
    line-height: 1.6;
    color: var(--text-secondary);
    overflow-y: auto;
    white-space: pre-wrap;
    word-break: break-word;
}
.output-area .error { color: var(--red); }
.output-area .success { color: var(--green); }
.output-area .info { color: var(--cyan); }

/* Problems */
.problems-area {
    flex: 1;
    overflow-y: auto;
    padding: 4px;
}
.problem-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 4px 8px;
    font-size: 12px;
    cursor: pointer;
    border-radius: 4px;
    transition: background var(--transition);
}
.problem-item:hover {
    background: var(--bg-hover);
}
.problem-icon.error { color: var(--red); }
.problem-icon.warning { color: var(--yellow); }
.problem-msg { color: var(--text-primary); }
.problem-loc { color: var(--text-muted); margin-left: auto; }

/* Terminal */
.terminal-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    background: var(--bg-darkest);
    overflow: hidden;
    position: relative;
}
.terminal-area .xterm {
    flex: 1;
    height: 100%;
}
.terminal-output {
    flex: 1;
    padding: 8px 12px;
    font-family: var(--font-code);
    font-size: 12px;
    line-height: 1.5;
    color: var(--text-secondary);
    overflow-y: auto;
    white-space: pre-wrap;
}
.terminal-input-line {
    display: flex;
    align-items: center;
    padding: 4px 12px;
    gap: 8px;
    border-top: 1px solid var(--border);
}
.terminal-prompt {
    color: var(--green);
    font-family: var(--font-code);
    font-size: 12px;
    font-weight: 600;
}
.terminal-input {
    flex: 1;
    background: none;
    border: none;
    color: var(--text-primary);
    font-family: var(--font-code);
    font-size: 12px;
    outline: none;
}

/* Preview */
.preview-area {
    flex: 1;
    overflow: hidden;
}
.preview-area iframe {
    width: 100%;
    height: 100%;
    border: none;
    background: #fff;
}

/* Empty State */
.empty-state {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--text-muted);
    font-size: 12px;
}

/* ========================================================================
   Chat Panel
   ======================================================================== */

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

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 12px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.chat-welcome {
    text-align: center;
    padding: 20px 12px;
    color: var(--text-secondary);
    font-size: 13px;
    line-height: 1.5;
}
.chat-avatar {
    font-size: 32px;
    margin-bottom: 8px;
}

.chat-suggestions {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    justify-content: center;
    margin-top: 12px;
}
.suggestion-btn {
    background: var(--bg-panel);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    font-family: var(--font-ui);
    font-size: 11px;
    padding: 4px 10px;
    border-radius: 12px;
    cursor: pointer;
    transition: all var(--transition);
}
.suggestion-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.chat-msg {
    padding: 8px 12px;
    border-radius: 8px;
    font-size: 12.5px;
    line-height: 1.6;
    max-width: 95%;
    animation: msgSlide 200ms ease;
}
@keyframes msgSlide {
    from { opacity: 0; transform: translateY(8px); }
    to   { opacity: 1; transform: translateY(0); }
}
.chat-msg.user {
    background: var(--accent);
    color: #fff;
    align-self: flex-end;
    border-bottom-right-radius: 2px;
}
.chat-msg.assistant {
    background: var(--bg-panel);
    color: var(--text-primary);
    align-self: flex-start;
    border-bottom-left-radius: 2px;
}
.chat-msg code {
    background: rgba(0,0,0,0.2);
    padding: 1px 4px;
    border-radius: 3px;
    font-family: var(--font-code);
    font-size: 11.5px;
}
.chat-msg pre {
    background: var(--bg-darkest);
    padding: 8px;
    border-radius: 4px;
    margin: 6px 0;
    overflow-x: auto;
    font-family: var(--font-code);
    font-size: 11.5px;
}

.chat-input-container {
    padding: 8px;
    border-top: 1px solid var(--border);
    display: flex;
    gap: 6px;
    align-items: flex-end;
}
.chat-input {
    flex: 1;
    background: var(--bg-input);
    border: 1px solid var(--border);
    color: var(--text-primary);
    font-family: var(--font-ui);
    font-size: 12.5px;
    padding: 8px 10px;
    border-radius: 6px;
    resize: none;
    outline: none;
    max-height: 100px;
    line-height: 1.4;
    transition: border-color var(--transition);
}
.chat-input:focus {
    border-color: var(--accent);
}
.chat-send {
    width: 34px;
    height: 34px;
    background: var(--accent);
    border: none;
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 6px;
    cursor: pointer;
    flex-shrink: 0;
    transition: all var(--transition);
}
.chat-send:hover {
    filter: brightness(1.15);
}

/* ========================================================================
   Status Bar
   ======================================================================== */

.statusbar {
    height: var(--statusbar-h);
    background: var(--accent);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 8px;
    font-size: 11.5px;
    color: #fff;
    z-index: 100;
}

.status-left, .status-right {
    display: flex;
    align-items: center;
    gap: 12px;
}

.status-item {
    display: flex;
    align-items: center;
    gap: 4px;
    cursor: pointer;
    padding: 0 4px;
    height: 100%;
    opacity: 0.9;
    transition: opacity var(--transition);
}
.status-item:hover {
    opacity: 1;
}
.status-item.accent {
    background: rgba(255,255,255,0.15);
    padding: 0 8px;
    border-radius: 3px;
    font-weight: 500;
}
.status-item.accent:hover {
    background: rgba(255,255,255,0.25);
}

/* ========================================================================
   Command Palette
   ======================================================================== */

.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    z-index: 1000;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding-top: 80px;
    animation: fadeIn 100ms ease;
}
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.command-palette {
    width: 560px;
    background: var(--bg-panel);
    border: 1px solid var(--border);
    border-radius: 8px;
    box-shadow: 0 16px 48px rgba(0,0,0,0.4);
    overflow: hidden;
    animation: slideDown 150ms ease;
}
@keyframes slideDown {
    from { opacity: 0; transform: translateY(-12px); }
    to   { opacity: 1; transform: translateY(0); }
}

.command-input-wrap {
    padding: 8px;
    border-bottom: 1px solid var(--border);
}
.command-input-wrap input {
    width: 100%;
    background: var(--bg-input);
    border: 1px solid var(--border);
    color: var(--text-primary);
    font-family: var(--font-ui);
    font-size: 14px;
    padding: 10px 14px;
    border-radius: 6px;
    outline: none;
    transition: border-color var(--transition);
}
.command-input-wrap input:focus {
    border-color: var(--accent);
}

.command-list {
    max-height: 320px;
    overflow-y: auto;
    padding: 4px;
}

.command-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 12px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 13px;
    color: var(--text-secondary);
    transition: all var(--transition);
}
.command-item:hover,
.command-item.selected {
    background: var(--bg-hover);
    color: var(--text-primary);
}
.command-item .shortcut {
    margin-left: auto;
    font-size: 11px;
    color: var(--text-muted);
}
.command-item kbd {
    font-size: 10px;
    padding: 0 4px;
}

/* ========================================================================
   Modal Dialog
   ======================================================================== */

.modal-dialog {
    background: var(--bg-panel);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 24px;
    width: 380px;
    box-shadow: 0 16px 48px rgba(0,0,0,0.4);
    animation: slideDown 150ms ease;
}
.modal-dialog h3 {
    font-size: 16px;
    font-weight: 500;
    margin-bottom: 16px;
}
.modal-dialog input {
    width: 100%;
    background: var(--bg-input);
    border: 1px solid var(--border);
    color: var(--text-primary);
    font-family: var(--font-ui);
    font-size: 14px;
    padding: 8px 12px;
    border-radius: 6px;
    outline: none;
    margin-bottom: 16px;
    transition: border-color var(--transition);
}
.modal-dialog input:focus {
    border-color: var(--accent);
}
.modal-actions {
    display: flex;
    gap: 8px;
    justify-content: flex-end;
}
.modal-btn {
    padding: 7px 18px;
    border: 1px solid var(--border);
    background: var(--bg-panel);
    color: var(--text-secondary);
    font-family: var(--font-ui);
    font-size: 12.5px;
    border-radius: 5px;
    cursor: pointer;
    transition: all var(--transition);
}
.modal-btn:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}
.modal-btn.primary {
    background: var(--accent);
    border-color: var(--accent);
    color: #fff;
}
.modal-btn.primary:hover {
    filter: brightness(1.1);
}

/* ========================================================================
   Dropdown Menu
   ======================================================================== */

.dropdown-menu {
    position: fixed;
    background: var(--bg-panel);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 4px;
    min-width: 180px;
    box-shadow: 0 8px 24px rgba(0,0,0,0.3);
    z-index: 500;
    animation: slideDown 100ms ease;
}

.dropdown-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 10px;
    font-size: 12.5px;
    color: var(--text-secondary);
    border-radius: 4px;
    cursor: pointer;
    transition: all var(--transition);
}
.dropdown-item:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}
.dropdown-separator {
    height: 1px;
    background: var(--border);
    margin: 4px 0;
}
.dropdown-item .shortcut {
    margin-left: auto;
    font-size: 11px;
    color: var(--text-muted);
}

/* ========================================================================
   Resize Handle
   ======================================================================== */

.resize-handle {
    position: absolute;
    z-index: 50;
}
.resize-handle.horizontal {
    width: 4px;
    height: 100%;
    cursor: col-resize;
    top: 0;
}
.resize-handle.vertical {
    height: 4px;
    width: 100%;
    cursor: row-resize;
    left: 0;
}
.resize-handle:hover {
    background: var(--accent);
}

/* ========================================================================
   Animations & Utilities
   ======================================================================== */

.running-indicator {
    display: inline-block;
    width: 8px;
    height: 8px;
    background: var(--green);
    border-radius: 50%;
    animation: pulse 1s infinite;
    margin-right: 4px;
}
@keyframes pulse {
    0%, 100% { opacity: 1; }
    50%      { opacity: 0.4; }
}

.spinner {
    display: inline-block;
    width: 14px;
    height: 14px;
    border: 2px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}
@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ========================================================================
   Responsive Design
   ======================================================================== */

.mobile-only {
    display: none;
}

/* Tablets and small laptops */
@media (max-width: 1024px) {
    :root {
        --sidebar-w: 220px;
        --chat-w: 260px;
    }
}

/* Small tablets and large phones */
@media (max-width: 900px) {
    :root {
        --sidebar-w: 200px;
        --chat-w: 0px;
    }
    .chat-panel { 
        position: fixed;
        right: 0;
        top: var(--titlebar-h);
        bottom: var(--statusbar-h);
        z-index: 1000;
        background: var(--bg-sidebar);
        box-shadow: -4px 0 12px rgba(0,0,0,0.3);
    }
    .chat-panel.collapsed {
        display: none;
    }
    .titlebar-center {
        min-width: 150px;
    }
    .window-title {
        min-width: 150px;
        font-size: 11px;
    }
}

/* Mobile Devices */
@media (max-width: 640px) {
    :root {
        --activity-w: 0px;
        --sidebar-w: 0px;
    }

    .mobile-only {
        display: flex;
    }

    .menu-bar, .titlebar-center, .titlebar-right .zoom-level {
        display: none;
    }

    .titlebar-right {
        gap: 2px;
    }

    .main-container {
        position: relative;
    }

    .activity-bar, .sidebar {
        position: fixed;
        left: 0;
        top: var(--titlebar-h);
        bottom: var(--statusbar-h);
        z-index: 1001;
        background: var(--bg-darkest);
        transform: translateX(-100%);
        transition: transform var(--transition);
        width: 48px;
    }

    .sidebar {
        left: 48px;
        width: 240px;
        background: var(--bg-sidebar);
        box-shadow: 4px 0 12px rgba(0,0,0,0.3);
    }

    .main-container.mobile-menu-open .activity-bar {
        transform: translateX(0);
    }
    .main-container.mobile-menu-open .sidebar {
        transform: translateX(0);
        width: calc(100vw - 48px);
    }

    .editor-area {
        width: 100vw;
    }

    .status-right .status-item:not(#statusRun) {
        display: none;
    }

    .modal-dialog {
        width: 95%;
        margin: 10px;
        padding: 15px;
    }

    .welcome-screen h1 {
        font-size: 22px;
    }
    .welcome-actions {
        flex-direction: column;
        width: 100%;
        padding: 0 20px;
    }
    .welcome-btn {
        width: 100%;
        justify-content: center;
    }
    .welcome-shortcuts {
        display: none;
    }

    .find-replace-bar {
        min-width: unset;
        width: 100%;
        border-radius: 0;
        left: 0;
    }
}

/* Extra small devices */
@media (max-width: 400px) {
    .titlebar-btn:not(#mobileMenuBtn):not(#themeToggle) {
        display: none;
    }
}