/* =============================================
   Brainfuck++ 2D IDE — VS Code 暗色主题
   ============================================= */

:root {
  --bg-primary: #1e1e1e;
  --bg-secondary: #252526;
  --bg-tertiary: #2d2d30;
  --bg-editor: #1a1a2e;
  --bg-input: #3c3c3c;
  --bg-hover: #2a2d2e;
  --bg-active: #37373d;
  --bg-sidebar: #252526;
  --bg-activity: #333333;
  --bg-activity-active: #1e1e1e;
  --bg-tab: #2d2d30;
  --bg-tab-active: #1a1a2e;
  --bg-button-run: #c72e2e;
  --bg-button-run-hover: #d93838;
  --bg-button-debug: #a87800;
  --bg-button-debug-hover: #c08e00;
  --bg-button-stop: #a1263a;
  --bg-button-stop-hover: #c42b47;
  --bg-button-clear: #5555aa;
  --bg-button-clear-hover: #6a6ac0;
  --bg-button-step: #007b5e;
  --bg-button-step-hover: #009873;
  --border-color: #3e3e42;
  --border-light: #47474a;
  --text-primary: #cccccc;
  --text-secondary: #999999;
  --text-muted: #6e6e6e;
  --text-white: #ffffff;
  --accent: #4fc1ff;
  --accent2: #6a9955;
  --accent3: #ce9178;
  --scrollbar-bg: #1e1e1e;
  --scrollbar-thumb: #424242;
  --scrollbar-thumb-hover: #555555;
  --syn-move: #4ec9b0;
  --syn-arithmetic: #dcdcaa;
  --syn-loop: #c586c0;
  --syn-comment: #6a9955;
  --syn-error: #f44747;
  --syn-highlight-line: rgba(79, 193, 255, 0.12);
  --quick-input-bg: #252526;
  --quick-input-border: #007acc;
  --statusbar-bg: #007acc;
  --statusbar-fg: #ffffff;
  --canvas-bg: #0a0a1a;
  --canvas-border: #c72e2e;
  --canvas-cursor: #ff3d3d;
  --canvas-grid: #2a2a2a;
  --saver-width: 48px;
  --sidebar-width: 220px;
  --titlebar-h: 30px;
  --toolbar-h: 36px;
  --tabs-h: 32px;
  --statusbar-h: 24px;
}

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

html, body {
  height: 100%; overflow: hidden;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  font-size: 13px; color: var(--text-primary);
  background: var(--bg-primary);
  user-select: none;
}

.app-container {
  display: flex; height: 100vh; width: 100vw;
  background: var(--bg-primary);
}

/* ========== 活动栏 ========== */
.activity-bar {
  width: var(--saver-width); background: var(--bg-activity);
  display: flex; flex-direction: column; align-items: center;
  padding-top: 6px; flex-shrink: 0;
  border-right: 1px solid var(--border-color);
}

.activity-icon {
  width: 48px; height: 48px; display: flex; align-items: center; justify-content: center;
  color: #858585; cursor: pointer; position: relative; transition: color 0.1s;
}

.activity-icon:hover { color: #cccccc; }

.activity-icon.active { color: #ffffff; }

.activity-icon.active::before {
  content: ''; position: absolute; left: 0; top: 8px; bottom: 8px;
  width: 2px; background: #ffffff; border-radius: 0 1px 1px 0;
}

.activity-spacer { flex: 1; }

/* ========== 侧边栏 ========== */
.sidebar {
  width: var(--sidebar-width); background: var(--bg-sidebar);
  display: flex; flex-direction: column; flex-shrink: 0;
  border-right: 1px solid var(--border-color);
  overflow: hidden; transition: width 0.15s;
}

.sidebar.collapsed { width: 0; border-right: none; }

.sidebar-header {
  padding: 10px 14px; font-size: 11px; text-transform: uppercase;
  letter-spacing: 1px; color: var(--text-secondary); flex-shrink: 0;
}

.sidebar-panel { flex: 1; overflow-y: auto; display: none; flex-direction: column; }
.sidebar-panel.active { display: flex; }

.sidebar-file-actions {
  display: flex; gap: 4px; padding: 4px 8px 10px; flex-shrink: 0;
}

.sidebar-action-btn {
  flex: 1; display: flex; align-items: center; justify-content: center; gap: 4px;
  padding: 5px 4px; font-size: 10px; color: var(--text-secondary);
  background: var(--bg-input); border: 1px solid var(--border-color); border-radius: 3px;
  cursor: pointer; transition: 0.1s;
}

.sidebar-action-btn:hover { background: var(--bg-hover); color: var(--text-white); }

.sidebar-section-title {
  padding: 6px 14px; font-size: 10px; text-transform: uppercase;
  letter-spacing: 1px; color: var(--text-secondary); flex-shrink: 0;
  border-top: 1px solid var(--border-color);
}

.examples-list { flex: 1; overflow-y: auto; padding: 0 8px; }

.example-item {
  padding: 4px 10px; cursor: pointer; color: var(--text-secondary);
  font-size: 12px; border-radius: 3px; transition: 0.1s; margin-bottom: 1px;
}

.example-item:hover { color: var(--text-primary); background: var(--bg-hover); }
.example-item.active { color: var(--accent); background: var(--bg-active); }

/* 搜索面板 */
.search-input-wrap {
  display: flex; align-items: center; gap: 6px;
  padding: 8px 10px; margin: 6px 8px;
  background: var(--bg-input); border: 1px solid var(--border-color); border-radius: 4px;
}

.search-input-wrap input {
  flex: 1; background: transparent; border: none; outline: none;
  color: var(--text-primary); font-size: 12px; font-family: inherit;
}

.search-input-wrap input::placeholder { color: var(--text-muted); }

.search-count { padding: 4px 14px; font-size: 11px; color: var(--text-muted); }

/* 帮助面板 */
.help-section { padding: 6px 14px; }
.help-title { font-size: 11px; font-weight: bold; color: var(--accent); padding: 6px 0 4px; }
.help-item { display: flex; align-items: center; gap: 8px; padding: 2px 0; font-size: 11px; color: var(--text-secondary); }
.help-item kbd {
  background: var(--bg-input); border: 1px solid var(--border-light);
  border-radius: 3px; padding: 1px 5px; font-size: 10px; font-family: 'Consolas', monospace;
  min-width: 60px; text-align: center; color: var(--text-primary);
}
.help-item code {
  background: var(--bg-editor); padding: 1px 6px; border-radius: 2px;
  font-size: 13px; font-weight: bold; min-width: 22px; text-align: center;
}
.help-item span { flex: 1; }

/* ========== 主区域 ========== */
.main-area {
  flex: 1; display: flex; flex-direction: column; overflow: hidden;
  min-width: 0;
}

/* ========== 标题栏 ========== */
.titlebar {
  display: flex; align-items: center; justify-content: space-between;
  height: var(--titlebar-h); background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  padding: 0 14px; flex-shrink: 0;
}

.titlebar-left { display: flex; align-items: center; gap: 8px; }

.titlebar-logo-icon { color: var(--accent); flex-shrink: 0; }

.titlebar-logo {
  font-size: 13px; color: var(--accent); font-weight: 600; letter-spacing: 0.3px;
}

.titlebar-logo b { color: var(--accent3); }

.titlebar-sub { color: var(--text-muted); font-weight: 400; font-size: 11px; }

.titlebar-right { font-size: 11px; color: var(--text-muted); }

/* ========== 工具栏 ========== */
.toolbar {
  display: flex; align-items: center; gap: 3px; flex-wrap: wrap;
  height: var(--toolbar-h); background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  padding: 0 8px; flex-shrink: 0;
}

.toolbar-separator { width: 1px; height: 18px; background: var(--border-light); margin: 0 4px; }

.tool-btn {
  display: flex; align-items: center; gap: 4px;
  padding: 3px 8px; border: none; border-radius: 3px;
  background: transparent; color: var(--text-primary);
  font-size: 12px; font-family: inherit; cursor: pointer;
  white-space: nowrap; transition: all 0.12s;
}

.tool-btn:hover { background: var(--bg-hover); }
.tool-btn:disabled { opacity: 0.35; cursor: not-allowed; transform: none !important; }
.tool-btn svg { flex-shrink: 0; }

.tool-btn.btn-run { background: var(--bg-button-run); color: #fff; }
.tool-btn.btn-run:hover:enabled { background: var(--bg-button-run-hover); transform: translateY(-1px); }

.tool-btn.btn-debug { background: var(--bg-button-debug); color: #fff; }
.tool-btn.btn-debug:hover:enabled { background: var(--bg-button-debug-hover); transform: translateY(-1px); }

.tool-btn.btn-stop { background: var(--bg-button-stop); color: #fff; }
.tool-btn.btn-stop:hover:enabled { background: var(--bg-button-stop-hover); transform: translateY(-1px); }

.tool-btn.btn-step { background: var(--bg-button-step); color: #fff; }
.tool-btn.btn-step:hover:enabled { background: var(--bg-button-step-hover); transform: translateY(-1px); }

.tool-btn.btn-clear { background: var(--bg-button-clear); color: #fff; }
.tool-btn.btn-clear:hover:enabled { background: var(--bg-button-clear-hover); transform: translateY(-1px); }

.speed-control { display: flex; align-items: center; gap: 4px; color: var(--text-secondary); font-size: 11px; }

.speed-control select {
  background: var(--bg-input); color: var(--text-primary);
  border: 1px solid var(--border-color); border-radius: 3px;
  padding: 2px 6px; font-size: 11px; cursor: pointer; outline: none;
}

.step-counter { color: var(--text-muted); font-size: 11px; margin-left: auto; }

/* ========== 文件标签栏 ========== */
.file-tabs {
  display: flex; height: var(--tabs-h); background: var(--bg-tab);
  border-bottom: 1px solid var(--border-color); flex-shrink: 0; overflow-x: auto;
}

.file-tab {
  display: flex; align-items: center; gap: 6px;
  padding: 0 14px; height: 100%; font-size: 12px; color: var(--text-secondary);
  border-right: 1px solid var(--border-color); cursor: pointer;
  white-space: nowrap; min-width: 80px; transition: 0.1s;
}

.file-tab.active { color: var(--text-white); background: var(--bg-tab-active); }

.file-tab:hover { background: var(--bg-hover); }
.file-tab.active:hover { background: var(--bg-tab-active); }

.file-tab-close {
  width: 16px; height: 16px; display: flex; align-items: center; justify-content: center;
  border-radius: 3px; opacity: 0; transition: 0.1s; color: var(--text-muted);
}

.file-tab:hover .file-tab-close { opacity: 1; }
.file-tab-close:hover { background: var(--bg-active); color: var(--text-white); }

/* ========== 工作区（编辑器 + 画布） ========== */
.workspace {
  flex: 1; display: flex; overflow: hidden; min-height: 0;
}

/* 编辑器面板 */
.editor-panel {
  flex: 1; display: flex; flex-direction: column; overflow: hidden; min-width: 300px;
  border-right: 1px solid var(--border-color);
}

.editor-container { flex: 1; display: flex; overflow: hidden; }

.line-numbers {
  width: 48px; background: var(--bg-editor);
  border-right: 1px solid var(--border-color);
  padding: 6px 0; overflow: hidden; flex-shrink: 0; text-align: right;
}

.line-number {
  height: 20px; line-height: 20px; padding-right: 8px;
  font-size: 11px; color: var(--text-muted);
  font-family: 'Consolas', 'Cascadia Code', monospace; cursor: pointer; position: relative;
}

.line-number.breakpoint::before {
  content: ''; position: absolute; left: 6px; top: 5px;
  width: 8px; height: 8px; background: #e51400; border-radius: 50%;
}

.line-number.highlight {
  background: var(--syn-highlight-line); color: var(--accent);
}

.code-area { flex: 1; position: relative; overflow: auto; }

.code-textarea {
  position: absolute; top: 0; left: 0; width: 100%; min-height: 100%;
  padding: 6px 14px; font-family: 'Consolas', 'Cascadia Code', monospace;
  font-size: 14px; line-height: 20px; color: transparent;
  caret-color: var(--accent); background: transparent;
  border: none; outline: none; resize: none; overflow: auto;
  white-space: pre; tab-size: 2; z-index: 2; letter-spacing: 0;
}

.code-highlight {
  position: absolute; top: 0; left: 0; width: 100%; min-height: 100%;
  padding: 6px 14px; font-family: 'Consolas', 'Cascadia Code', monospace;
  font-size: 14px; line-height: 20px;
  white-space: pre; tab-size: 2;
  pointer-events: none; z-index: 1; overflow: hidden;
  color: var(--text-primary);
}

.code-highlight .syn-move { color: var(--syn-move); }
.code-highlight .syn-arithmetic { color: var(--syn-arithmetic); }
.code-highlight .syn-loop { color: var(--syn-loop); }
.code-highlight .syn-comment { color: var(--syn-comment); font-style: italic; }

/* 画布面板 */
.canvas-panel {
  width: 420px; flex-shrink: 0; display: flex; flex-direction: column;
  align-items: center; background: var(--bg-primary); padding: 10px 12px 0 12px;
  overflow: hidden; height: 100%;
}

.canvas-section-header {
  display: flex; align-items: center; justify-content: space-between;
  width: 100%; padding: 0 0 6px 0;
  font-size: 10px; text-transform: uppercase;
  letter-spacing: 1.2px; color: var(--accent); flex-shrink: 0;
}

.canvas-wrapper {
  width: 400px; height: 400px; display: flex; align-items: center; justify-content: center;
  border: 2px solid var(--canvas-border); border-radius: 4px;
  background: var(--canvas-bg); overflow: hidden; flex-shrink: 0; position: relative;
}

#pixel-canvas {
  background: var(--canvas-bg);
  transition: transform 0.12s ease-out; image-rendering: pixelated;
}

/* 画布工具栏：↑↓ | +- | <> | [] */
.canvas-toolbar {
  display: flex; align-items: center; gap: 3px; flex-wrap: wrap;
  justify-content: center; margin-top: 8px; flex-shrink: 0;
}

.canvas-toolbar button {
  display: flex; align-items: center; justify-content: center; gap: 2px;
  border: none; padding: 8px 10px; border-radius: 3px;
  font-size: 13px; cursor: pointer; transition: all 0.12s;
  color: var(--bg-primary); min-width: 36px; height: 34px;
}

.ct-sep { width: 8px; flex-shrink: 0; }

.canvas-toolbar .ct-btn-dir { background: #4fc1ff; }
.canvas-toolbar .ct-btn-dir:hover { background: #6ad4ff; transform: translateY(-1px); }

.canvas-toolbar .ct-btn-val { background: #dcdcaa; color: #1a1a2e; }
.canvas-toolbar .ct-btn-val:hover { background: #e8e8c0; transform: translateY(-1px); }

.canvas-toolbar .ct-btn-loop { background: #c586c0; color: #1a1a2e; }
.canvas-toolbar .ct-btn-loop:hover { background: #d69ed2; transform: translateY(-1px); }

/* 元数据按钮 */
.meta-buttons {
  display: flex; gap: 8px; margin-top: 6px; justify-content: center; flex-shrink: 0;
}

.meta-buttons button {
  display: flex; align-items: center; gap: 4px;
  background: var(--bg-input); color: var(--text-secondary);
  border: 1px solid var(--border-color); padding: 6px 12px; border-radius: 4px;
  font-size: 10px; cursor: pointer; transition: 0.12s; font-family: inherit;
}

.meta-buttons button:hover { background: var(--bg-hover); color: var(--text-white); }
.meta-buttons button svg { flex-shrink: 0; }

.canvas-info {
  margin-top: 4px; font-size: 10px; color: var(--text-muted);
  text-align: center; line-height: 1.5; flex-shrink: 0;
}

.canvas-info b { color: var(--accent); }

/* ========== 状态栏 ========== */
.statusbar {
  display: flex; align-items: center; justify-content: space-between;
  height: var(--statusbar-h); padding: 0 8px; margin-top: auto;
  background: var(--statusbar-bg); color: var(--statusbar-fg);
  font-size: 11px; flex-shrink: 0; width: 100%; align-self: stretch;
}

.statusbar-left, .statusbar-right { display: flex; align-items: center; gap: 10px; }
.status-item { display: flex; align-items: center; gap: 5px; }

.status-dot { width: 7px; height: 7px; border-radius: 50%; }
.status-dot.running { background: #00ff88; animation: pulse 0.8s infinite; }
.status-dot.paused { background: #dcdcaa; }
.status-dot.stopped { background: #99c9ff; }
.status-dot.error { background: #f44747; }

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

/* ========== 命令面板 ========== */
.quick-input-overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,0.5);
  display: flex; align-items: flex-start; justify-content: center;
  padding-top: 15vh; z-index: 100; opacity: 0; pointer-events: none;
  transition: opacity 0.15s;
}

.quick-input-overlay.show { opacity: 1; pointer-events: all; }

.quick-input-box {
  width: 520px; max-height: 360px; background: var(--quick-input-bg);
  border: 1px solid var(--quick-input-border); border-radius: 6px;
  display: flex; flex-direction: column; overflow: hidden;
  box-shadow: 0 8px 32px rgba(0,0,0,0.6);
}

.quick-input-header {
  display: flex; align-items: center; gap: 8px; padding: 6px 10px;
  border-bottom: 1px solid var(--border-color); flex-shrink: 0;
}

.quick-input-header input {
  flex: 1; background: transparent; border: none; outline: none;
  color: var(--text-primary); font-size: 13px; font-family: inherit;
}

.quick-input-header input::placeholder { color: var(--text-muted); }

.quick-input-list { flex: 1; overflow-y: auto; max-height: 300px; }

.quick-input-item {
  display: flex; align-items: center; gap: 10px;
  padding: 6px 12px; font-size: 12px; cursor: pointer; transition: 0.08s;
  color: var(--text-secondary);
}

.quick-input-item:hover, .quick-input-item.selected { background: var(--bg-active); color: var(--text-white); }

.quick-input-item .cmd-name { flex: 1; }
.quick-input-item .cmd-key {
  font-size: 10px; color: var(--text-muted); font-family: 'Consolas', monospace;
}

/* ========== 滚动条 ========== */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--scrollbar-thumb); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--scrollbar-thumb-hover); }
::-webkit-scrollbar-corner { background: transparent; }

/* ========== Toast ========== */
.toast {
  position: fixed; bottom: 36px; right: 16px;
  padding: 6px 14px; background: var(--bg-input);
  border: 1px solid var(--border-color); border-radius: 4px;
  color: var(--text-primary); font-size: 12px; z-index: 200;
  opacity: 0; transform: translateY(8px);
  transition: all 0.2s; pointer-events: none;
  font-family: inherit;
}

.toast.show { opacity: 1; transform: translateY(0); }

/* ========== 响应式 ========== */
@media (max-width: 900px) {
  .workspace { flex-direction: column; }
  .canvas-panel { width: 100%; flex-shrink: 1; }
  .sidebar { width: 0; overflow: hidden; }
}