/* ============================================================
   学生端样式 —— 沿用「数智育才」门户设计系统（育才蓝），
   便于后期整合进 shuzhiyucai.cn。色板/字体/圆角/阴影均与门户一致：
   - 品牌蓝 yucai: 500 #177de8 / 600 #0b63c7 / 700 #074f9f / 800 #0a437f / 900 #0d3969
   - 文字 ink #102033，背景 lab #f5f8fb，强调橙 signal #f4a51c
   - 卡片 tool-surface：8px 圆角 + 1px 淡边 + 柔和阴影
   ============================================================ */
:root {
  --bg: #f5f8fb;            /* lab */
  --panel: #ffffff;
  --yucai-50: #eef7ff;
  --yucai-100: #d8ecff;
  --yucai-200: #b7dcff;
  --yucai-500: #177de8;
  --yucai-600: #0b63c7;
  --yucai-700: #074f9f;     /* 主按钮 */
  --yucai-800: #0a437f;
  --yucai-900: #0d3969;
  --signal: #f4a51c;        /* 上传/强调 */
  --signal-d: #e49412;
  --ink: #102033;
  --muted: #475569;
  --slate: #64748b;
  --border: rgba(16, 32, 51, 0.1);
  --ok: #15803d;
  --off: #94a3b8;
  --danger: #d92d20;
  --shadow-soft: 0 18px 60px rgba(16, 32, 51, 0.12);
  --safe-top: env(safe-area-inset-top, 0px);
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
[hidden] { display: none !important; }
html, body { height: 100%; margin: 0; }
body {
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont,
    "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--ink);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
::selection { background: var(--yucai-200); color: var(--ink); }

/* ---------- 顶栏（门户风：白底 sticky + logo + 标题） ---------- */
.topbar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: calc(9px + var(--safe-top)) 12px 9px;
  background: var(--panel);
  border-bottom: 1px solid #e2e8f0;
  flex-wrap: wrap;
}
.brand { display: flex; align-items: center; gap: 9px; min-width: 0; }
.brand img { height: 32px; width: 32px; border-radius: 7px; object-fit: contain; }
.brand .brand-text { display: flex; flex-direction: column; line-height: 1.1; min-width: 0; }
.brand .brand-title { font-weight: 800; font-size: 15px; color: var(--ink); white-space: nowrap; }
.brand .brand-sub { font-size: 11px; font-weight: 700; color: var(--yucai-600); }
.spacer { flex: 1; }

.device-chip {
  display: flex; align-items: center; gap: 6px;
  padding: 5px 11px; border-radius: 999px;
  background: var(--yucai-50); border: 1px solid var(--yucai-100);
  font-size: 13px; white-space: nowrap;
}
.device-chip .dot { width: 9px; height: 9px; border-radius: 50%; background: var(--off); }
.device-chip[data-state="online"] .dot { background: var(--ok); box-shadow: 0 0 0 3px rgba(21,128,61,.15); }
.device-chip[data-state="offline"] .dot { background: var(--signal); }
.device-chip .dev-id { font-weight: 800; color: var(--yucai-800); }
.device-chip .dev-state { color: var(--slate); }

/* ---------- 按钮（门户范式：rounded-md / font-bold） ---------- */
.btn {
  border: 1px solid #cbd5e1;
  background: #fff; color: var(--ink);
  padding: 9px 14px; border-radius: 6px;
  font-size: 14px; font-weight: 700; cursor: pointer;
  transition: background .12s, filter .12s;
  min-height: 42px;
}
.btn:active { filter: brightness(.96); }
.btn:disabled { opacity: .45; cursor: not-allowed; }
.btn-primary { background: var(--yucai-700); border-color: var(--yucai-700); color: #fff; }
.btn-primary:hover:not(:disabled) { background: var(--yucai-800); }
.btn-upload { background: var(--signal); border-color: var(--signal); color: var(--ink); }
.btn-upload:hover:not(:disabled) { background: var(--signal-d); }
.btn-warn { background: #fff; border-color: #fca5a5; color: var(--danger); }
.btn-warn:hover:not(:disabled) { background: #fef2f2; }
.btn-ghost { background: #fff; border-color: #cbd5e1; color: var(--muted); }
.btn-ghost:hover:not(:disabled) { background: #f1f5f9; }
.btn-sm { padding: 4px 10px; min-height: 32px; font-size: 13px; }
.btn-labeled { display: inline-flex; align-items: center; gap: 6px; padding-left: 12px; padding-right: 14px; }
.btn-labeled .btn-ico { font-size: 16px; line-height: 1; }
.btn-labeled .btn-txt { font-size: 14px; }
.btn-caret { font-size: 16px; line-height: 1; color: var(--slate); }
.btn.block { width: 100%; }
.focus-ring:focus-visible { outline: 3px solid var(--yucai-300, #85c6ff); outline-offset: 2px; }

.file-menu-wrap { position: relative; }
.file-menu-wrap.open #btnFile {
  background: var(--yucai-700);
  border-color: var(--yucai-700);
  color: #fff;
}
.file-menu-wrap.open .btn-caret { color: #fff; transform: rotate(180deg); }
.file-menu {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  z-index: 70;
  min-width: 250px;
  padding: 8px 0;
  background: #fff;
  border: 1px solid #d7dee8;
  border-radius: 8px;
  box-shadow: 0 18px 42px rgba(16, 32, 51, 0.18);
}
.file-menu[hidden] { display: none; }
.file-menu button {
  width: 100%;
  min-height: 42px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 8px 16px;
  border: 0;
  background: transparent;
  color: var(--ink);
  font: inherit;
  font-size: 16px;
  cursor: pointer;
}
.file-menu button:hover,
.file-menu button:focus-visible {
  background: var(--yucai-50);
  outline: none;
}
.file-menu-label { font-weight: 700; }
.file-menu-key { color: var(--muted); font-size: 15px; white-space: nowrap; }
.file-menu-sep {
  height: 1px;
  background: #e2e8f0;
  margin: 6px 0;
}

/* 首屏 boot：app.js 就绪前按 localStorage 预布局，避免刷新闪回「模块」 */
html[data-boot-view="split"] .work-row { display: flex; flex: 1; min-height: 0; }
html[data-boot-view="split"] #blocklyDiv { flex: 1 1 50%; }
html[data-boot-view="split"] #codePanel { display: flex !important; flex: 1 1 50%; }
html[data-boot-view="split"] #splitResizer { display: block !important; }
html[data-boot-view="code"] #blocklyDiv { display: none; }
html[data-boot-view="code"] #codePanel { display: flex !important; flex: 1 1 100%; }
html[data-boot-view="code"] #splitResizer { display: none !important; }

/* ---------- 三态分段控件（模块 / 混合 / 代码） ---------- */
.view-switch {
  display: inline-flex;
  background: var(--yucai-50);
  border: 1px solid var(--yucai-100);
  border-radius: 999px;
  padding: 3px;
  gap: 2px;
}
.view-switch .vs-btn {
  border: 0; background: transparent; color: var(--yucai-700);
  font-size: 13px; font-weight: 700; cursor: pointer;
  padding: 0 14px; min-height: 36px; border-radius: 999px;
  transition: background .12s, color .12s;
}
.view-switch .vs-btn:hover:not(.active) { background: var(--yucai-100); }
.view-switch .vs-btn.active {
  background: var(--yucai-700); color: #fff;
  box-shadow: 0 1px 4px rgba(7, 79, 159, .25);
}
#btnExamples.active,
.examples-fab.active {
  background: var(--yucai-50); border-color: var(--yucai-500); color: var(--yucai-700);
}

/* ---------- 工作区（例程侧栏 + 上：积木/代码；下：串口） ---------- */
.workspace { flex: 1; position: relative; display: flex; flex-direction: row; min-height: 0; }
.workspace-main { flex: 1; display: flex; flex-direction: column; min-width: 0; min-height: 0; }
.work-row { flex: 1; position: relative; display: flex; min-height: 0; }
#blocklyDiv { flex: 1; height: 100%; min-width: 0; }
.code-example-note {
  position: absolute; left: 14px; top: 14px; z-index: 12;
  max-width: min(520px, calc(50% - 32px));
  display: flex; gap: 8px; align-items: center; flex-wrap: wrap;
  padding: 8px 10px;
  border: 1px solid #bfdbfe; border-radius: 8px;
  background: rgba(239, 246, 255, 0.96); color: var(--ink);
  box-shadow: 0 6px 18px rgba(30, 64, 175, 0.12);
  font-size: 12px; line-height: 1.45;
  pointer-events: none;
}
.code-example-note[hidden] { display: none; }
.code-example-note strong { color: var(--yucai-700); font-weight: 800; }
.code-example-note span { color: var(--muted); }

/* 三态布局：data-view 驱动 Blockly / 代码面板 / 分隔条 显隐与分栏 */
.workspace[data-view="blocks"] #blocklyDiv { flex: 1 1 100% !important; }
.workspace[data-view="blocks"] #codePanel,
.workspace[data-view="blocks"] #splitResizer { display: none !important; }

.workspace[data-view="split"] #blocklyDiv { flex: 1 1 50%; }
.workspace[data-view="split"] #codePanel { display: flex; flex: 1 1 50%; }

.workspace[data-view="code"] #blocklyDiv,
.workspace[data-view="code"] #splitResizer { display: none; }
.workspace[data-view="code"] #codePanel { display: flex; flex: 1 1 100% !important; }

/* ---------- 代码面板（Monaco / 降级 textarea，浅色，与整体育才蓝一致） ---------- */
.code-panel {
  flex-direction: column; min-width: 0; height: 100%;
  background: var(--panel); border-left: 1px solid #e2e8f0;
}
.code-panel[hidden] { display: none; }
.code-panel-head {
  display: flex; justify-content: space-between; align-items: center;
  padding: 8px 12px; background: #f1f5f9; font-size: 13px; color: var(--muted);
  border-bottom: 1px solid #e2e8f0; flex: 0 0 auto;
}
.code-dirty-badge {
  font-size: 11px; font-weight: 700; color: var(--ink);
  background: var(--signal); padding: 2px 8px; border-radius: 999px;
}
.code-dirty-badge[hidden] { display: none; }
.code-panel-body { flex: 1; min-height: 0; position: relative; }
/* CodeMirror 6 充满代码面板 */
.code-panel-body .cm-editor { height: 100%; }
/* Monaco 自带滚动；降级 textarea 充满（浅色） */
.code-fallback {
  width: 100%; height: 100%; box-sizing: border-box;
  border: 0; resize: none; outline: none;
  background: #fff; color: var(--ink);
  font-family: "SF Mono", Menlo, Consolas, monospace;
  font-size: 13px; line-height: 1.55; padding: 10px 12px;
  white-space: pre; tab-size: 4;
}

/* ---------- 混合态分隔条（触屏可拖拽） ---------- */
.split-resizer {
  flex: 0 0 6px; cursor: col-resize; background: #e2e8f0;
  position: relative; touch-action: none;
}
.split-resizer::after {
  content: ""; position: absolute; top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 4px; height: 36px; border-radius: 2px; background: var(--slate);
}
.split-resizer:hover { background: var(--yucai-200); }
.split-resizer[hidden] { display: none; }

/* ---------- 例程（入口在 Blockly 工具箱底部，面板贴近工具箱） ---------- */
.examples-fab {
  position: fixed; left: 16px; bottom: 16px; z-index: 40;
  display: inline-flex; align-items: center; gap: 6px;
  padding: 10px 16px; border-radius: 999px;
  border: 1px solid var(--yucai-200); background: var(--panel);
  color: var(--yucai-700); font-size: 14px; font-weight: 800;
  box-shadow: 0 8px 28px rgba(16, 32, 51, 0.14);
  cursor: pointer;
}
.examples-fab[hidden] { display: none; }
.examples-fab:hover { background: var(--yucai-50); border-color: var(--yucai-500); }

.examples-popover {
  position: fixed; left: 148px; top: 176px; z-index: 41;
  width: min(300px, calc(100vw - 168px)); max-height: min(420px, calc(100vh - 196px));
  display: flex; flex-direction: column;
  background: var(--panel); border: 1px solid #e2e8f0; border-radius: 12px;
  box-shadow: var(--shadow-soft); overflow: hidden;
}
.examples-popover[hidden] { display: none; }
.examples-head {
  position: relative; padding: 14px 14px 10px; border-bottom: 1px solid #e2e8f0;
  background: var(--yucai-50);
}
.examples-head h3 { margin: 0; font-size: 16px; font-weight: 800; color: var(--ink); }
.examples-sub { margin: 4px 0 0; font-size: 12px; color: var(--muted); line-height: 1.4; padding-right: 28px; }
.examples-close {
  position: absolute; top: 10px; right: 10px; min-width: 32px; padding: 4px 8px;
}
.examples-body { flex: 1; overflow: auto; padding: 10px 12px 16px; }
.examples-section { margin-bottom: 14px; }
.examples-cat {
  margin: 0 0 8px; font-size: 12px; font-weight: 800; color: var(--yucai-700);
  text-transform: none; letter-spacing: 0;
}
.examples-collection-title {
  font-size: 13px; color: var(--ink);
}
.examples-part {
  margin: 10px 0 6px; font-size: 12px; font-weight: 800; color: var(--yucai-700);
}
.examples-chapter {
  margin: 8px 0 6px; padding-left: 8px; border-left: 3px solid var(--yucai-200);
  font-size: 12px; font-weight: 700; color: var(--muted);
}
.example-card {
  display: flex; flex-direction: column; align-items: flex-start; gap: 4px;
  width: 100%; text-align: left; margin-bottom: 8px; padding: 12px 12px;
  border: 1px solid #e2e8f0; border-radius: 8px; background: #fff; cursor: pointer;
  transition: border-color .12s, box-shadow .12s;
}
.example-card:hover { border-color: var(--yucai-200); box-shadow: 0 4px 14px rgba(16, 32, 51, 0.06); }
.example-card:active { background: var(--yucai-50); }
.example-title { font-size: 14px; font-weight: 800; color: var(--ink); }
.example-desc { font-size: 12px; color: var(--muted); line-height: 1.45; }
.example-meta {
  display: inline-flex; align-items: center; min-height: 20px; padding: 2px 7px;
  border-radius: 999px; background: var(--yucai-50); color: var(--yucai-700);
  font-size: 11px; font-weight: 800;
}

/* 串口区高度拖拽条 */
.console-resizer {
  flex: 0 0 6px; cursor: row-resize; background: #0b1726;
  position: relative; touch-action: none; border-top: 1px solid #1a2d42;
}
.console-resizer::after {
  content: ""; position: absolute; top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 36px; height: 4px; border-radius: 2px; background: #64748b;
}
.console-resizer:hover { background: #132a40; }
.console-resizer:hover::after { background: var(--yucai-500); }
.console-resizer[hidden] { display: none; }

/* 串口输出：工作区下方全宽面板（文本 / 曲线双视图） */
.console {
  flex: 0 0 auto; width: 100%; height: var(--console-h, 260px);
  min-height: 120px; max-height: 70vh;
  background: var(--ink); color: #cfe0f0;
  display: flex; flex-direction: column; border-top: none;
}
.console[hidden] { display: none; }
.console-head {
  display: flex; justify-content: space-between; align-items: center; gap: 8px;
  padding: 6px 12px; background: #0b1726; font-size: 13px; color: #93b4d6;
  flex-wrap: wrap;
}
.console-head-left { display: flex; align-items: center; gap: 10px; }
.console-title { font-weight: 700; color: #cfe0f0; white-space: nowrap; }
.console-tabs {
  display: flex; gap: 2px; padding: 2px; border-radius: 6px; background: rgba(255,255,255,0.06);
}
.console-tab {
  border: none; background: transparent; color: #93b4d6;
  font-size: 12px; font-weight: 700; padding: 4px 10px; border-radius: 4px; cursor: pointer;
}
.console-tab.active { background: var(--yucai-600); color: #fff; }
.console-live {
  flex: 1; min-width: 60px; text-align: center;
  font-family: "SF Mono", Menlo, monospace; font-size: 12px; color: var(--yucai-200);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.console-content { flex: 1; min-height: 0; position: relative; }
.console-body {
  position: absolute; inset: 0; margin: 0; padding: 10px 12px; overflow: auto;
  font-family: "SF Mono", Menlo, Consolas, monospace; font-size: 12.5px; line-height: 1.5;
  white-space: pre-wrap; word-break: break-word;
}
.console-body[hidden] { display: none; }
.console-chart-wrap {
  position: absolute; inset: 0; background: #0a1520;
}
.console-chart-wrap[hidden] { display: none; }
.console-chart-wrap canvas { display: block; width: 100%; height: 100%; }

/* ---------- 弹窗（tool-surface 风格） ---------- */
.modal {
  position: fixed; inset: 0; z-index: 50;
  background: rgba(16, 32, 51, 0.5);
  display: flex; align-items: center; justify-content: center; padding: 16px;
}
.modal[hidden] { display: none; }
.modal-card {
  background: #fff; border-radius: 8px; padding: 22px;
  width: 100%; max-width: 400px; box-shadow: var(--shadow-soft);
  border: 1px solid var(--border);
  max-height: 90vh; overflow: auto;
}
.modal-card h3 { margin: 0 0 6px; font-size: 18px; font-weight: 800; color: var(--ink); }
.modal-card label { display: block; font-size: 13px; font-weight: 700; color: var(--ink); margin: 14px 0 5px; }
.modal-card input,
.modal-card select {
  width: 100%; padding: 11px 12px; border: 1px solid #cbd5e1;
  border-radius: 6px; font-size: 15px; color: var(--ink);
  background: #fff;
}
.modal-card input:focus-visible,
.modal-card select:focus-visible { outline: 3px solid #85c6ff; outline-offset: 1px; border-color: var(--yucai-500); }
.modal-actions { display: flex; gap: 8px; justify-content: flex-end; margin-top: 18px; }
.file-actions { display: flex; gap: 8px; flex-wrap: wrap; }
.file-actions .btn { flex: 1; min-width: 120px; }
.file-meta { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 8px; }
.file-meta input { flex: 1; min-width: 140px; }
.save-as-modal { max-width: 520px; }
.muted { color: var(--muted); font-size: 13px; margin: 4px 0; line-height: 1.6; }
.divider { text-align: center; color: var(--slate); font-size: 12px; margin: 16px 0; position: relative; }
.divider::before, .divider::after {
  content: ""; position: absolute; top: 50%; width: 40%; height: 1px; background: #e2e8f0;
}
.divider::before { left: 0; } .divider::after { right: 0; }
.bind-msg { font-size: 13px; min-height: 18px; margin-top: 8px; font-weight: 600; }
.bind-msg.err { color: var(--danger); }
.bind-msg.ok { color: var(--ok); }

#scanVideo { width: 100%; border-radius: 8px; background: #000; aspect-ratio: 4/3; object-fit: cover; }
.code-preview {
  background: var(--ink); color: #cfe0f0; border-radius: 8px; padding: 12px;
  font-family: "SF Mono", Menlo, monospace; font-size: 12px; max-height: 220px; overflow: auto;
  white-space: pre-wrap; word-break: break-word;
}

/* ---------- Toast ---------- */
.toast {
  position: fixed; left: 50%; bottom: 24px; transform: translateX(-50%);
  background: var(--ink); color: #fff; padding: 11px 18px; border-radius: 8px;
  font-size: 14px; font-weight: 600; z-index: 60; box-shadow: var(--shadow-soft); max-width: 90vw;
}
.toast[hidden] { display: none; }

/* 平板竖屏 / 较窄屏：收起副标题，避免顶栏换行 */
@media (max-width: 920px) {
  .brand .brand-sub { display: none; }
}

/* 窄屏：混合态改为上下叠放（避免左右过挤） */
@media (max-width: 768px) {
  .workspace[data-view="split"] .work-row { flex-direction: column; }
  .workspace[data-view="split"] #blocklyDiv { flex: 1 1 50%; height: auto; }
  .workspace[data-view="split"] #codePanel { flex: 1 1 50%; border-left: 0; border-top: 1px solid #e2e8f0; }
  .code-example-note { max-width: calc(100vw - 40px); }
  .workspace[data-view="split"] #splitResizer {
    flex: 0 0 6px; cursor: row-resize; width: 100%;
  }
  .workspace[data-view="split"] #splitResizer::after { width: 36px; height: 4px; }
}

/* 传输模式切换：复用视图切换的分段样式，配蓝色描边区分「设备连接」语义 */
.transport-switch { margin-left: 2px; border-color: var(--yucai-200); }
.transport-switch .vs-btn.active { background: var(--yucai-700); color: #fff; }
.transport-switch .vs-btn:disabled { opacity: 0.45; cursor: not-allowed; }
a.btn { text-decoration: none; display: inline-flex; align-items: center; }

/* Mixly 式工具条：图标 + 文字 */
.mixly-toolbar {
  display: flex; align-items: center; gap: 2px;
  padding: 0 6px; margin-left: 4px;
  border-left: 1px solid #e2e8f0;
}
.tb-btn {
  display: inline-flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 1px; min-width: 48px; padding: 4px 8px;
  border: none; background: transparent; border-radius: 8px;
  color: var(--yucai-700); cursor: pointer;
  font-size: 11px; font-weight: 700; line-height: 1.1;
}
.tb-btn:hover:not(:disabled) { background: var(--yucai-50); }
.tb-btn:disabled { opacity: 0.35; cursor: not-allowed; }
.tb-btn svg { flex-shrink: 0; }

/* 初始化固件弹窗 */
.init-fw-modal { max-width: 440px; }
.init-fw-step { font-size: 14px; color: var(--muted); line-height: 1.6; margin: 8px 0 14px; min-height: 2.8em; }
.init-fw-progress { height: 12px; background: #eef2f7; border-radius: 999px; overflow: hidden; margin-bottom: 12px; }
.init-fw-progress .progress-bar { height: 100%; width: 0; background: linear-gradient(90deg, var(--signal), var(--yucai-600)); transition: width .2s ease; }
.init-fw-result { background: var(--yucai-50); border: 1px solid var(--yucai-200); border-radius: 10px; padding: 12px 14px; font-size: 15px; color: var(--ink); margin-bottom: 8px; }
.init-fw-result strong { font-size: 22px; color: var(--yucai-700); letter-spacing: 1px; margin: 0 6px; }
.init-id-label { font-size: 12px; color: var(--slate); font-weight: 700; }
.init-id-meta { display: block; font-size: 12px; color: var(--muted); margin-top: 6px; }

@media (max-width: 600px) {
  .brand .brand-title { font-size: 14px; }
  .btn { padding: 8px 10px; font-size: 13px; }
  .view-switch .vs-btn { padding: 0 10px; font-size: 12px; }
  .examples-popover {
    left: 12px;
    top: 156px;
    bottom: auto;
    width: calc(100vw - 24px);
    max-height: calc(100vh - 176px);
  }
  .btn-labeled .btn-txt { font-size: 13px; }
}