/* =========================================================
   弹性盒子可视化设计器 —— 界面样式
   ========================================================= */

:root {
  --bg: #f4f6fb;
  --panel: #ffffff;
  --panel-2: #f8fafc;
  --border: #e3e8f0;
  --border-strong: #cfd8e6;
  --text: #16202e;
  --text-2: #5b6b80;
  --text-3: #8b9bb0;
  --accent: #4f46e5;
  --accent-soft: #eef0ff;
  --accent-2: #0ea5e9;
  --tab-green: #16a34a;
  --tab-green-soft: #e8f7ee;
  --danger: #e11d48;
  --radius: 10px;
  --shadow: 0 1px 2px rgba(16, 24, 40, .05), 0 8px 24px -12px rgba(16, 24, 40, .12);
  --mono: "JetBrains Mono", Consolas, "Courier New", monospace;
  --sans: "PingFang SC", "Microsoft YaHei", "Segoe UI", system-ui, -apple-system, sans-serif;
}

* { box-sizing: border-box; }

html, body { height: 100%; }

body {
  margin: 0;
  font-family: var(--sans);
  font-size: 14px;
  color: var(--text);
  background: var(--bg);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

code {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text-3);
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1px 5px;
}

/* ---------------- 顶部栏 ---------------- */
.topbar {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 20px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
}

.brand { display: flex; align-items: center; gap: 12px; }

.brand-logo {
  width: 38px; height: 38px;
  display: grid; place-items: center;
  font-size: 20px;
  color: #fff;
  border-radius: 11px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 6px 16px -6px rgba(79, 70, 229, .7);
}

.brand-text h1 { margin: 0; font-size: 16px; font-weight: 700; letter-spacing: .3px; }
.brand-text p  { margin: 2px 0 0; font-size: 12px; color: var(--text-2); }

/* ---------------- 按钮 ---------------- */
.btn {
  font-family: inherit;
  font-size: 13px;
  border: 1px solid var(--border-strong);
  background: var(--panel);
  color: var(--text);
  border-radius: 8px;
  padding: 7px 14px;
  cursor: pointer;
  transition: .16s ease;
}
.btn:hover { border-color: var(--accent); color: var(--accent); }

.btn-ghost { background: transparent; }

.btn-mini {
  font-size: 12px;
  padding: 3px 9px;
  border-radius: 6px;
  color: var(--text-2);
  background: var(--panel-2);
}
.btn-mini:hover { color: var(--accent); border-color: var(--accent); }
.btn-mini.active { background: var(--accent); border-color: var(--accent); color: #fff; font-weight: 700; }

/* 子元素批量全选提示 */
.batch-tip {
  margin-top: 8px; padding: 6px 10px;
  font-size: 11.5px; line-height: 1.5;
  color: var(--accent);
  background: var(--accent-soft);
  border: 1px solid var(--border-strong);
  border-radius: 7px;
}

/* ---------------- 顶栏选项组（像素模式 / CSS 类型） ---------------- */
.topbar-actions { display: flex; align-items: center; gap: 14px; }

.opt { display: flex; align-items: center; gap: 7px; }
.opt-label { font-size: 12px; color: var(--text-2); white-space: nowrap; }

.opt-switch {
  display: flex;
  gap: 3px;
  padding: 3px;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 9px;
}
.opt-btn {
  font-family: inherit;
  font-size: 12px;
  font-weight: 500;
  min-width: 40px;
  padding: 4px 9px;
  border: 1px solid transparent;
  border-radius: 6px;
  background: transparent;
  color: var(--text-2);
  cursor: pointer;
  transition: .16s ease;
}
.opt-btn:hover { color: var(--accent); }
.opt-btn.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  font-weight: 700;
  box-shadow: 0 3px 9px -4px rgba(79, 70, 229, .85);
}

/* ---------------- 三栏布局 ---------------- */
.layout {
  flex: 1 1 auto;
  min-height: 0;
  display: grid;
  grid-template-columns: 350px minmax(320px, 1fr) 420px;
  gap: 14px;
  padding: 14px;
}

.col {
  min-height: 0;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.col-scroll { overflow-y: auto; overflow-x: hidden; padding: 4px 14px 24px; }

.col-left  { scrollbar-width: thin; }
.col-left::-webkit-scrollbar,
.code-box::-webkit-scrollbar,
.col-scroll::-webkit-scrollbar { width: 8px; height: 8px; }
.col-left::-webkit-scrollbar-thumb,
.code-box::-webkit-scrollbar-thumb,
.col-scroll::-webkit-scrollbar-thumb { background: #d3dbe8; border-radius: 8px; }
.col-left::-webkit-scrollbar-thumb:hover,
.col-scroll::-webkit-scrollbar-thumb:hover { background: #b9c5d8; }

/* ---------------- 分组 ---------------- */
.group { padding: 14px 0 6px; border-bottom: 1px dashed var(--border); }
.group:last-child { border-bottom: none; }

.group-title {
  display: flex; align-items: center; gap: 8px;
  margin: 0 0 12px;
  font-size: 13px; font-weight: 700;
  letter-spacing: .3px;
}
.group-title .dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
.group-title code { margin-left: auto; }

/* ---------------- 布局模式切换 ---------------- */
.mode-switch { display: flex; gap: 6px; }
.mode-btn {
  flex: 1 1 0;
  font-family: inherit;
  font-size: 12.5px;
  font-weight: 500;
  padding: 9px 6px;
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  background: var(--panel-2);
  color: var(--text-2);
  cursor: pointer;
  transition: .14s ease;
}
.mode-btn:hover { border-color: var(--tab-green); color: var(--tab-green); }
.mode-btn.active {
  background: var(--tab-green);
  border-color: var(--tab-green);
  color: #fff;
  font-weight: 700;
  box-shadow: 0 4px 12px -5px rgba(22, 163, 74, .85);
}

/* ---------------- 容器 / 子元素属性选项卡 ---------------- */
.prop-tabs { display: flex; gap: 6px; margin-bottom: 14px; }
.prop-tab {
  flex: 1 1 0;
  min-width: 0;
  display: flex; align-items: center; justify-content: center; gap: 6px;
  font-family: inherit;
  font-size: 12.5px;
  font-weight: 500;
  white-space: nowrap;
  padding: 9px 8px;
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  background: var(--panel-2);
  color: var(--text-2);
  cursor: pointer;
  transition: .14s ease;
}
.prop-tab:hover { border-color: var(--tab-green); color: var(--tab-green); }
.prop-tab.active {
  background: var(--tab-green);
  border-color: var(--tab-green);
  color: #fff;
  font-weight: 700;
  box-shadow: 0 4px 12px -5px rgba(22, 163, 74, .85);
}
.prop-tab code {
  min-width: 0;
  max-width: 45%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 10px;
}
.prop-tab.active code { background: rgba(255, 255, 255, .18); color: #eef0ff; border-color: transparent; }

/* ---------------- 类名重命名 ---------------- */
.name-row { display: flex; gap: 8px; margin-top: 10px; }
.name-cell { flex: 1 1 0; min-width: 0; }
.name-cap { display: block; font-size: 11.5px; color: var(--text-2); margin-bottom: 4px; }
.name-input {
  display: flex; align-items: center;
  border: 1px solid var(--border-strong);
  border-radius: 7px;
  background: var(--panel-2);
  transition: .14s ease;
}
.name-input:focus-within { border-color: var(--accent); background: #fff; }
.name-input i {
  flex: 0 0 auto;
  padding-left: 9px;
  font-family: var(--mono);
  font-style: normal;
  font-size: 13px;
  color: var(--text-3);
}
.name-input input {
  flex: 1 1 auto;
  min-width: 0;
  font-family: var(--mono);
  font-size: 12.5px;
  padding: 6px 9px 6px 1px;
  border: 0;
  background: transparent;
  color: var(--text);
}
.name-input input:focus { outline: none; }

/* ---------------- 字段 ---------------- */
.field { margin-bottom: 15px; }

.field-head {
  display: flex; align-items: center; gap: 8px;
  margin-bottom: 7px;
  min-height: 22px;
}
.field-label { font-size: 13px; color: var(--text); font-weight: 500; }
.field-head code { font-size: 10px; }
.field-value {
  margin-left: auto;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--accent);
  background: var(--accent-soft);
  border-radius: 5px;
  padding: 2px 7px;
  white-space: nowrap;
}
.field-hint { font-size: 11px; color: var(--text-3); margin: 5px 0 0; line-height: 1.5; }
.mini-actions { margin-left: auto; display: flex; gap: 6px; }

/* 分段选择器 */
.seg {
  display: flex; flex-wrap: wrap; gap: 5px;
}
.seg button {
  flex: 1 1 auto;
  font-family: inherit;
  font-size: 12px;
  line-height: 1;
  padding: 7px 8px;
  min-width: 52px;
  border: 1px solid var(--border-strong);
  background: var(--panel-2);
  color: var(--text-2);
  border-radius: 7px;
  cursor: pointer;
  transition: .14s ease;
}
.seg button:hover { border-color: var(--accent); color: var(--accent); }
.seg button.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  font-weight: 600;
  box-shadow: 0 4px 10px -4px rgba(79, 70, 229, .8);
}

/* 滑块 */
input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 20px;
  background: transparent;
  cursor: pointer;
  margin: 0;
}
input[type="range"]::-webkit-slider-runnable-track {
  height: 5px; border-radius: 5px;
  background: linear-gradient(90deg, var(--accent) var(--fill, 0%), #e6ebf3 var(--fill, 0%));
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 16px; height: 16px; margin-top: -5.5px;
  border-radius: 50%;
  background: #fff;
  border: 2px solid var(--accent);
  box-shadow: 0 1px 4px rgba(16, 24, 40, .25);
}
input[type="range"]::-moz-range-track { height: 5px; border-radius: 5px; background: #e6ebf3; }
input[type="range"]::-moz-range-progress { height: 5px; border-radius: 5px; background: var(--accent); }
input[type="range"]::-moz-range-thumb {
  width: 14px; height: 14px; border-radius: 50%;
  background: #fff; border: 2px solid var(--accent);
}

/* 文本输入 */
.input-text {
  width: 100%;
  font-family: inherit;
  font-size: 13px;
  padding: 7px 10px;
  border: 1px solid var(--border-strong);
  border-radius: 7px;
  background: var(--panel-2);
  color: var(--text);
}
.input-text:focus { outline: none; border-color: var(--accent); background: #fff; }

/* 步进器 */
.stepper { display: flex; align-items: stretch; gap: 6px; }
.stepper button {
  width: 30px; flex: 0 0 30px;
  font-size: 15px; line-height: 1;
  border: 1px solid var(--border-strong);
  background: var(--panel-2);
  border-radius: 7px;
  color: var(--text-2);
  cursor: pointer;
}
.stepper button:hover { border-color: var(--accent); color: var(--accent); }
.stepper input {
  flex: 1 1 auto; min-width: 0;
  font-family: var(--mono); font-size: 13px; text-align: center;
  border: 1px solid var(--border-strong);
  border-radius: 7px;
  background: var(--panel-2);
  padding: 6px 4px;
  color: var(--text);
}
.stepper input:focus { outline: none; border-color: var(--accent); background: #fff; }

/* 自动 / 数值 切换 */
.auto-row { display: flex; align-items: center; gap: 8px; }
.toggle {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 12px; color: var(--text-2);
  border: 1px solid var(--border-strong);
  background: var(--panel-2);
  border-radius: 7px;
  padding: 5px 9px;
  cursor: pointer;
  user-select: none;
  white-space: nowrap;
}
.toggle i {
  width: 26px; height: 15px; border-radius: 9px;
  background: #d7dfec; position: relative; transition: .16s;
}
.toggle i::after {
  content: ""; position: absolute; top: 2px; left: 2px;
  width: 11px; height: 11px; border-radius: 50%;
  background: #fff; transition: .16s;
  box-shadow: 0 1px 2px rgba(0, 0, 0, .2);
}
.toggle.on { color: var(--accent); border-color: var(--accent); background: var(--accent-soft); }
.toggle.on i { background: var(--accent); }
.toggle.on i::after { left: 13px; }
.auto-row .range-box { flex: 1 1 auto; min-width: 0; }
.auto-row .range-box.disabled { opacity: .38; pointer-events: none; }

/* 子元素选择 chips */
.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chip {
  font-family: var(--mono);
  font-size: 12px;
  min-width: 34px;
  padding: 6px 9px;
  text-align: center;
  border: 1px solid var(--border-strong);
  border-radius: 7px;
  background: var(--panel-2);
  color: var(--text-2);
  cursor: pointer;
  transition: .14s;
}
.chip:hover { border-color: var(--accent); color: var(--accent); }
.chip.active { background: var(--accent); border-color: var(--accent); color: #fff; font-weight: 700; }

/* 预设（位于预览区上方） */
.preset-bar { flex: 0 0 auto; margin-bottom: 12px; }
.preset-bar-head { display: flex; align-items: baseline; gap: 10px; }
.preset-bar-head .group-title { margin-bottom: 8px; border-bottom: none; }
.preset-hint { font-size: 11px; color: var(--text-3); margin-bottom: 8px; }

.preset-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(116px, 1fr)); gap: 8px; }
.preset {
  font-family: inherit; font-size: 12px;
  display: flex; flex-direction: column; align-items: flex-start; gap: 5px;
  padding: 9px 10px;
  border: 1px solid var(--border-strong);
  border-radius: 9px;
  background: var(--panel-2);
  color: var(--text);
  cursor: pointer;
  transition: .14s;
}
.preset:hover { border-color: var(--accent); background: var(--accent-soft); }
.preset.active { border-color: var(--accent); background: var(--accent-soft); box-shadow: inset 0 0 0 1px var(--accent); }
.preset .preset-name { font-weight: 600; }
.preset .preset-vis { display: flex; gap: 2px; width: 100%; height: 20px; padding: 2px; border: 1px dashed var(--border-strong); border-radius: 4px; }
.preset .preset-vis.grid { display: grid; }
.preset .preset-vis i { display: block; min-width: 4px; min-height: 4px; background: #a5b4fc; border-radius: 2px; }

/* ---------------- 预览区 ---------------- */
.col-center { padding: 12px 14px; }

.preview-head {
  display: flex; align-items: center; justify-content: space-between;
  gap: 12px; margin-bottom: 10px;
}
.axis {
  display: flex; align-items: center; gap: 6px;
  font-size: 11px; color: var(--text-3);
  font-family: var(--mono);
}
.axis-main { color: var(--accent); }
.axis-cross { color: var(--accent-2); }
.axis-arrow { font-size: 10px; }

.preview-wrap {
  flex: 1 1 auto;
  min-height: 0;
  overflow: auto;
  display: flex;
  padding: 14px;
  border-radius: var(--radius);
  background:
    linear-gradient(45deg, #eef1f7 25%, transparent 25%, transparent 75%, #eef1f7 75%) 0 0 / 18px 18px,
    linear-gradient(45deg, #eef1f7 25%, #f7f9fc 25%, #f7f9fc 75%, #eef1f7 75%) 9px 9px / 18px 18px;
  border: 1px solid var(--border);
}

/* 被设计的目标容器（display 由 JS 内联决定） */
.flex-container,
.grid-container {
  border: 2px dashed var(--accent);
  border-radius: 8px;
  background: rgba(255, 255, 255, .72);
  backdrop-filter: blur(2px);
  transition: width .18s ease, height .18s ease;
}

/* 被设计的子元素（展示样式不会出现在生成的代码里） */
.item {
  display: grid;
  place-items: center;
  min-width: 56px;
  min-height: 56px;
  padding: 14px 18px;
  font-size: 13px;
  font-weight: 600;
  color: #3730a3;
  background: linear-gradient(180deg, #eef2ff, #e0e7ff);
  border: 1px solid #c7d2fe;
  border-radius: 8px;
  cursor: pointer;
  user-select: none;
  transition: .14s ease;
}
.item:hover { border-color: var(--accent); }
.grid-container .item { min-width: 0; min-height: 0; }
.item.selected {
  color: #fff;
  background: linear-gradient(180deg, #6366f1, #4f46e5);
  border-color: #4338ca;
  box-shadow: 0 0 0 3px rgba(79, 70, 229, .28);
}

.preview-tip {
  flex: 0 0 auto;
  margin: 10px 0 0;
  font-size: 11px;
  line-height: 1.6;
  color: var(--text-3);
}

/* ---------------- 代码面板 ---------------- */
.col-right { background: #101725; border-color: #101725; }

.code-tabs {
  flex: 0 0 auto;
  display: flex; align-items: center; gap: 4px;
  padding: 8px 10px;
  border-bottom: 1px solid #1e2a3f;
}
.tab {
  font-family: inherit; font-size: 12px;
  padding: 6px 13px;
  border: 1px solid transparent;
  border-radius: 7px;
  background: transparent;
  color: #7f8ea8;
  cursor: pointer;
}
.tab:hover { color: #cbd5e1; }
.tab.active { background: #1c2740; color: #fff; border-color: #2b3b5c; font-weight: 600; }
.tab-copy { margin-left: auto; background: #1c2740; border-color: #2b3b5c; color: #cbd5e1; }
.tab-copy:hover { color: #fff; border-color: var(--accent); }

.code-box {
  flex: 1 1 auto;
  min-height: 0;
  overflow: auto;
  margin: 0;
  padding: 14px 16px;
  background: #101725;
}
.code-box code {
  font-family: var(--mono);
  font-size: 12.5px;
  line-height: 1.75;
  color: #d5deee;
  background: none; border: none; padding: 0;
  white-space: pre;
  display: block;
}
.tok-selector { color: #7dd3fc; }
.tok-prop      { color: #c4b5fd; }
.tok-value     { color: #86efac; }
.tok-comment   { color: #64748b; font-style: italic; }
.tok-tag       { color: #fca5a5; }
.tok-attr      { color: #fcd34d; }
.tok-str       { color: #86efac; }
.tok-punct     { color: #94a3b8; }

.legend {
  flex: 0 0 auto;
  display: flex; flex-wrap: wrap; gap: 14px;
  padding: 8px 16px 10px;
  border-top: 1px solid #1e2a3f;
  font-size: 11px;
  color: #7f8ea8;
}
.legend span { display: inline-flex; align-items: center; gap: 5px; }
.sw { width: 9px; height: 9px; border-radius: 2px; display: inline-block; }
.sw-selector { background: #7dd3fc; }
.sw-prop { background: #c4b5fd; }
.sw-value { background: #86efac; }
.sw-comment { background: #64748b; }

/* ---------------- Toast ---------------- */
.toast {
  position: fixed;
  left: 50%; bottom: 28px;
  transform: translate(-50%, 20px);
  padding: 9px 18px;
  border-radius: 999px;
  background: #16202e;
  color: #fff;
  font-size: 13px;
  opacity: 0;
  pointer-events: none;
  transition: .22s ease;
  box-shadow: 0 10px 30px -10px rgba(0, 0, 0, .5);
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }

/* ---------------- 响应式 ---------------- */
@media (max-width: 1280px) {
  .layout { grid-template-columns: 320px minmax(280px, 1fr) 340px; }
}

@media (max-width: 1080px) {
  body { overflow: auto; height: auto; }
  .layout {
    display: flex;
    flex-direction: column;
    padding: 12px;
  }
  .col { overflow: visible; }
  .col-scroll { overflow: visible; }
  .col-center { min-height: 460px; }
  .col-right { min-height: 320px; }
  .code-box { max-height: 420px; }
}