/* MixOS 工作台 — 固定三栏：左文件 | 中代码 | 右上板/右下输出；分隔条可拖 */
:root {
  --wb-accent: #0d6b62;
  --wb-accent-soft: #e6f5f3;
  --wb-border: #c8d4dc;
  --wb-panel-bg: #f4f7f9;
  --wb-left-w: 220px;
  --wb-right-w: 438px;
  --wb-board-h: 226px; /* 与主板场景等高，默认完整露出主控与四外设 */
  --wb-toolbar-h: 44px;
  --wb-split: 6px;
}

html, body {
  height: 100%;
  margin: 0;
  overflow: hidden;
}

body.workbench-body {
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: #eef2f5;
  color: #1f2328;
}

.wb-app {
  display: grid;
  height: 100vh;
  grid-template-rows: 44px 1fr;
  grid-template-columns: var(--wb-left-w) var(--wb-split) minmax(200px, 1fr) var(--wb-split) var(--wb-right-w);
  grid-template-areas:
    "top top top top top"
    "left splitL center splitR right";
}

/* —— 顶栏 —— */
.wb-top {
  grid-area: top;
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 0 0.85rem;
  background: linear-gradient(90deg, #05504a, var(--wb-accent));
  color: #fff;
}
.wb-top h1 { margin: 0; font-size: 0.95rem; font-weight: 600; }
.wb-top .wb-lesson-title { font-size: 0.85rem; opacity: 0.92; }
.wb-top a { color: #fff; text-decoration: none; font-size: 0.82rem; opacity: 0.9; }
.wb-top a:hover { opacity: 1; text-decoration: underline; }
.wb-top-spacer { flex: 1; }

/* —— 可拖拽分隔条 —— */
.wb-split {
  position: relative;
  z-index: 5;
  background: #d5dde3;
  transition: background 0.12s ease;
}
.wb-split::after {
  content: "";
  position: absolute;
  inset: 0;
  margin: auto;
  opacity: 0.55;
  pointer-events: none;
}
.wb-split-v {
  grid-row: 2;
  cursor: col-resize;
  touch-action: none;
}
#wb-split-left { grid-area: splitL; }
#wb-split-right { grid-area: splitR; }
.wb-split-v::after {
  width: 2px;
  height: 28px;
  border-radius: 1px;
  background: repeating-linear-gradient(
    to bottom,
    #6a7a86 0 3px,
    transparent 3px 6px
  );
}
.wb-split-h {
  cursor: row-resize;
  touch-action: none;
  min-height: var(--wb-split);
}
.wb-split-h::after {
  width: 28px;
  height: 2px;
  border-radius: 1px;
  background: repeating-linear-gradient(
    to right,
    #8a9aa6 0 3px,
    transparent 3px 6px
  );
}
.wb-split:hover,
.wb-split.is-dragging {
  background: #9ec9c3;
}
.wb-split:focus-visible {
  outline: 2px solid var(--wb-accent);
  outline-offset: -2px;
}
body.wb-resizing-col { cursor: col-resize !important; user-select: none; }
body.wb-resizing-row { cursor: row-resize !important; user-select: none; }
body.wb-resizing-col iframe,
body.wb-resizing-row iframe {
  pointer-events: none;
}

/* —— 左侧课表（树：课 → 源文件） —— */
.wb-left {
  grid-area: left;
  overflow: auto;
  background: #fff;
  border-right: 0;
  padding: 0.55rem 0.45rem;
  min-width: 0;
}
.wb-left h2 {
  margin: 0.25rem 0.35rem 0.45rem;
  font-size: 0.72rem;
  color: #666;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.wb-tree {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.wb-tree-lesson-btn {
  display: flex;
  align-items: center;
  gap: 0.28rem;
  width: 100%;
  appearance: none;
  border: 0;
  background: transparent;
  border-radius: 6px;
  padding: 0.32rem 0.35rem;
  text-align: left;
  cursor: pointer;
  color: #333;
  font-size: 0.76rem;
  line-height: 1.25;
}
.wb-tree-lesson-btn:hover { background: var(--wb-accent-soft); }
.wb-tree-lesson.is-current > .wb-tree-lesson-btn {
  background: var(--wb-accent-soft);
  color: var(--wb-accent);
  font-weight: 600;
}

.wb-tree-caret {
  flex: 0 0 0.7rem;
  width: 0.7rem;
  height: 0.7rem;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: rotate(-45deg);
  opacity: 0.55;
  margin: 0 0.1rem 0.1rem 0.15rem;
  transition: transform 0.12s ease;
}
.wb-tree-lesson.is-open > .wb-tree-lesson-btn .wb-tree-caret {
  transform: rotate(45deg);
  margin-top: 0;
  margin-bottom: 0.2rem;
}

.wb-tree-lesson-label {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.wb-tree-files {
  display: none;
  list-style: none;
  margin: 0 0 0.25rem;
  padding: 0 0 0 1.05rem;
}
.wb-tree-lesson.is-open > .wb-tree-files {
  display: block;
}

.wb-tree-files li { margin: 0; }
.wb-tree-file {
  display: block;
  width: 100%;
  appearance: none;
  border: 0;
  background: transparent;
  border-radius: 5px;
  padding: 0.22rem 0.4rem;
  text-align: left;
  cursor: pointer;
  color: #444;
  font-size: 0.74rem;
  font-family: ui-monospace, Consolas, "Cascadia Mono", monospace;
  line-height: 1.3;
}
.wb-tree-file:hover { background: #eef3f6; color: #111; }
.wb-tree-file.is-active {
  background: var(--wb-accent-soft);
  color: var(--wb-accent);
  font-weight: 600;
}
.wb-tree-file.is-lib {
  color: #666;
}
.wb-tree-file.is-include {
  color: #5a6a7a;
  font-style: italic;
}
.wb-tree-empty {
  padding: 0.2rem 0.4rem;
  font-size: 0.72rem;
  color: #999;
}

.wb-tree-folder {
  margin: 0.15rem 0 0;
}
.wb-tree-folder-btn {
  display: flex;
  align-items: center;
  gap: 0.28rem;
  width: 100%;
  appearance: none;
  border: 0;
  background: transparent;
  border-radius: 5px;
  padding: 0.22rem 0.3rem;
  text-align: left;
  cursor: pointer;
  color: #555;
  font-size: 0.72rem;
  line-height: 1.3;
}
.wb-tree-folder-btn:hover { background: #eef3f6; }
.wb-tree-folder-btn .wb-tree-caret {
  flex: 0 0 0.55rem;
  width: 0.55rem;
  height: 0.55rem;
  margin: 0 0.05rem 0.08rem 0.1rem;
}
.wb-tree-folder.is-open > .wb-tree-folder-btn .wb-tree-caret {
  transform: rotate(45deg);
  margin-top: 0;
  margin-bottom: 0.15rem;
}
.wb-tree-folder-label {
  font-family: ui-monospace, Consolas, "Cascadia Mono", monospace;
  font-weight: 600;
  color: #3a5a6e;
}
.wb-tree-folder-count {
  margin-left: auto;
  font-size: 0.65rem;
  color: #99a;
  padding-right: 0.2rem;
}
.wb-tree-folder-files {
  display: none;
  list-style: none;
  margin: 0;
  padding: 0 0 0 0.85rem;
}
.wb-tree-folder.is-open > .wb-tree-folder-files {
  display: block;
}

/* —— 中间：控制条 + 代码 —— */
.wb-center {
  grid-area: center;
  display: grid;
  grid-template-rows: var(--wb-toolbar-h) 1fr;
  min-width: 0;
  min-height: 0;
  background: #fff;
  border-right: 0;
}

.wb-center-toolbar {
  display: flex;
  align-items: center;
  flex-wrap: nowrap;
  gap: 0.45rem 0.65rem;
  padding: 0 0.55rem;
  background: #f7f9fb;
  border-bottom: 1px solid var(--wb-border);
  min-height: var(--wb-toolbar-h);
  height: var(--wb-toolbar-h);
  overflow-x: auto;
  overflow-y: hidden;
  white-space: nowrap;
}

.wb-tool-group {
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
  gap: 0.3rem;
}

.wb-tool-status {
  margin-left: auto;
  flex-shrink: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 0.74rem;
  color: #666;
}

.wb-tool {
  appearance: none;
  border: 1px solid var(--wb-border);
  background: #fff;
  border-radius: 6px;
  padding: 0.28rem 0.65rem;
  font-size: 0.78rem;
  cursor: pointer;
  color: #222;
  line-height: 1.2;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
}
.wb-tool:hover { border-color: var(--wb-accent); }
.wb-tool:disabled { opacity: 0.45; cursor: not-allowed; }
.wb-tool-select {
  min-width: 7.5rem;
  max-width: 11rem;
  padding-right: 1.4rem;
  background-image: linear-gradient(45deg, transparent 50%, #fff 50%),
    linear-gradient(135deg, #fff 50%, transparent 50%);
  background-position: calc(100% - 14px) 55%, calc(100% - 9px) 55%;
  background-size: 5px 5px, 5px 5px;
  background-repeat: no-repeat;
  background-color: #0d9488;
  border-color: #0f766e;
  color: #fff;
  cursor: pointer;
}
.wb-tool-select:disabled {
  opacity: 0.55;
}
.wb-tool-select option {
  color: #222;
  background: #fff;
}
.wb-tool-serial-primary {
  background: #0d9488;
  border-color: #0f766e;
  color: #fff;
}
.wb-tool-serial-primary:hover:not(:disabled) {
  background: #0f766e;
}
.wb-tool-primary {
  background: #0969da;
  border-color: #0969da;
  color: #fff;
}
.wb-tool-run {
  background: var(--wb-accent);
  border-color: var(--wb-accent);
  color: #fff;
}
.wb-tool-stop,
.wb-tool-run.is-running {
  background: #cf222e;
  border-color: #cf222e;
  color: #fff;
}
.wb-tool-link[hidden] { display: none !important; }

.wb-mode-toggle {
  min-width: 5.2rem;
  font-weight: 600;
  background: var(--wb-accent-soft);
  color: var(--wb-accent);
  border-color: var(--wb-border);
}
.wb-mode-toggle.is-upload {
  background: #ecfdf5;
  color: #0f766e;
  border-color: #99f6e4;
}
.wb-mode-toggle:hover:not(:disabled) {
  filter: brightness(0.97);
}

.wb-code-pane {
  min-height: 0;
  overflow: hidden;
  background: #fff;
  padding: 0;
  display: flex;
  flex-direction: column;
}

.wb-lab-code-only .lab-toolbar { display: none !important; }
.wb-lab-code-only .lab-log { display: none !important; }

.wb-lab-code-only {
  display: flex;
  flex-direction: column;
  min-height: 100%;
  height: 100%;
  background: #fff;
}

.wb-lab-code-only .lab-sources-host,
.wb-lab-code-only .lab-sources-single {
  max-height: none;
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 0;
  margin: 0;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: #fff;
  overflow: auto;
}

/* 路径左侧树已提示，中间不再单独占一行 */
.wb-lab-code-only .lab-active-path {
  display: none !important;
}

.wb-lab-code-only .lab-code {
  max-height: none;
  flex: 1;
  min-height: 0;
  margin: 0;
  padding: 0.75rem 1rem;
  border: 0;
  border-radius: 0;
  background: #fff;
  color: #1f2328;
  font-size: 0.84rem;
  line-height: 1.55;
  overflow: auto;
}

.wb-lab-code-only textarea.lab-code-editor {
  width: 100%;
  height: 100%;
  min-height: 0;
  resize: none;
  border: 0;
  border-radius: 0;
  box-shadow: none;
  background: #fff;
  color: #1f2328;
}

.wb-lab-code-only textarea.lab-code-editor:focus {
  border: 0;
  box-shadow: none;
  outline: none;
}

.wb-lab-code-only textarea.lab-code-editor.is-readonly {
  background: #f6f8fa;
  color: #57606a;
}

.wb-hint {
  font-size: 0.8rem;
  color: #666;
  margin: 0.5rem 0;
}

.wb-pane-label {
  flex-shrink: 0;
  padding: 0.25rem 0.55rem;
  font-size: 0.7rem;
  color: #8b949e;
  background: #161b22;
  border-bottom: 1px solid #30363d;
}

/* —— 右侧：上板 / 下编译·串口·OS —— */
.wb-right {
  grid-area: right;
  display: grid;
  grid-template-rows: var(--wb-board-h) var(--wb-split) minmax(120px, 1fr);
  min-width: 0;
  min-height: 0;
  background: #1a1a1a;
}

.wb-board-slot {
  display: flex;
  flex-direction: column;
  min-height: 0;
  border-bottom: 0;
  background: #12131a;
}
.wb-board-frame-wrap {
  position: relative;
  flex: 1;
  min-height: 0;
  display: flex;
  align-items: stretch;
  justify-content: center;
  overflow: hidden;
}
.wb-board-frame {
  width: 100%;
  height: 100%;
  border: 0;
  background: #12131a;
  overflow: auto;
}
.wb-board-frame[hidden] { display: none !important; }
.wb-board-placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #888;
  font-size: 0.8rem;
  background: #111;
}
.wb-board-placeholder[hidden] { display: none !important; }

.wb-output-slot {
  display: flex;
  flex-direction: column;
  min-height: 0;
  background: #0d1117;
}

.wb-output-tabs {
  flex-shrink: 0;
  display: flex;
  gap: 0;
  background: #161b22;
  border-bottom: 1px solid #30363d;
}

.wb-output-tab {
  appearance: none;
  border: 0;
  background: transparent;
  color: #8b949e;
  padding: 0.35rem 0.55rem;
  font-size: 0.72rem;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  white-space: nowrap;
}
.wb-output-tab:hover { color: #c9d1d9; }
.wb-output-tab.is-active {
  color: #7ee787;
  border-bottom-color: #3fb950;
  font-weight: 600;
}

.wb-output-panels {
  flex: 1;
  min-height: 0;
  position: relative;
  display: flex;
  flex-direction: column;
}

.wb-output-panel {
  flex: 1;
  min-height: 0;
  display: flex;
  flex-direction: column;
}
.wb-output-panel[hidden] { display: none !important; }

.wb-serial,
.wb-compile-log {
  flex: 1;
  margin: 0;
  padding: 0.45rem 0.6rem;
  overflow: auto;
  font-family: Consolas, "Courier New", monospace;
  font-size: 0.74rem;
  line-height: 1.4;
  color: #c9d1d9;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  word-break: normal;
  background: transparent;
}

.wb-download-progress {
  flex-shrink: 0;
  padding: 0.45rem 0.6rem 0.35rem;
  border-bottom: 1px solid #30363d;
  background: #161b22;
}
.wb-download-progress[hidden] { display: none !important; }
.wb-download-progress-label {
  font-size: 0.72rem;
  color: #7ee787;
  margin-bottom: 0.3rem;
}
.wb-download-progress-track {
  height: 8px;
  border-radius: 4px;
  background: #21262d;
  overflow: hidden;
}
.wb-download-progress-bar {
  height: 100%;
  width: 0%;
  border-radius: 4px;
  background: linear-gradient(90deg, #0d6b62, #3fb950);
  transition: width 0.12s ease-out;
}
.wb-download-progress.is-indeterminate .wb-download-progress-bar {
  width: 35% !important;
  animation: wb-progress-indeterminate 1.1s ease-in-out infinite;
}
@keyframes wb-progress-indeterminate {
  0% { transform: translateX(-120%); }
  100% { transform: translateX(320%); }
}
.wb-download-progress-meta {
  margin-top: 0.28rem;
  font-size: 0.68rem;
  color: #8b949e;
  font-family: Consolas, "Courier New", monospace;
}

/* —— OS 监视器（嵌在板卡下方 Tab） —— */
.wb-monitor-embedded {
  flex: 1;
  min-height: 0;
  display: flex;
  flex-direction: column;
  background: #0d1117;
  color: #c9d1d9;
  border-top: 0;
}
.wb-monitor-embedded .wb-monitor-head {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.2rem 0.35rem;
  background: #161b22;
  border-bottom: 1px solid #30363d;
}
.wb-monitor-embedded .wb-monitor-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.15rem;
  flex: 1;
}
.wb-monitor-embedded .wb-monitor-tabs button {
  appearance: none;
  border: 1px solid transparent;
  background: transparent;
  border-radius: 5px;
  padding: 0.18rem 0.4rem;
  font-size: 0.7rem;
  cursor: pointer;
  color: #8b949e;
}
.wb-monitor-embedded .wb-monitor-tabs button:hover { color: #c9d1d9; }
.wb-monitor-embedded .wb-monitor-tabs button.is-active {
  background: #21262d;
  border-color: #30363d;
  color: #7ee787;
  font-weight: 600;
}
.wb-monitor-embedded .wb-monitor-tabs button.is-locked {
  opacity: 0.4;
  cursor: not-allowed;
}
.wb-monitor-embedded .wb-monitor-body {
  flex: 1;
  overflow: auto;
  padding: 0.45rem 0.55rem;
  font-size: 0.74rem;
  color: #c9d1d9;
}
.wb-monitor-pane[hidden] { display: none !important; }

.wb-kv-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.72rem;
  color: #c9d1d9;
}
.wb-kv-table th, .wb-kv-table td {
  border: 1px solid #30363d;
  padding: 0.25rem 0.4rem;
  text-align: left;
}
.wb-kv-table th { background: #161b22; color: #8b949e; }
.wb-mem-bar {
  height: 8px;
  background: #21262d;
  border-radius: 4px;
  overflow: hidden;
  margin: 0.3rem 0;
}
.wb-mem-bar span {
  display: block;
  height: 100%;
  background: var(--wb-accent);
}
.wb-locked-note { color: #8b949e; font-style: italic; }

/* 窄屏也保持「左文件 | 中代码 | 右板/输出」三栏，不改布局结构 */
@media (max-width: 1100px) {
  :root {
    --wb-left-w: 160px;
    --wb-right-w: 438px;
    --wb-board-h: 226px;
  }
}

@media (max-width: 720px) {
  :root {
    --wb-left-w: 132px;
    --wb-right-w: 426px;
    --wb-board-h: 226px;
  }
}