/* ============================================================
   styles.css — 糖果玩具风

   方向不是「米色 + 陶土红」那种文艺暖，而是拼豆本身的塑料糖果感：
      · 奶油底 + 巧克力色墨线（不用纯黑）
      · 草莓红 / 芒果黄 / 薄荷青三个高饱和色当主角
      · 一律 2px 描边 + 贴纸式硬阴影（不用柔和投影），按钮按下去会「压扁」
      · 珠子条（.rail）作为唯一的花哨元素：一排真的豆子，兼做分隔线和加载指示
   ============================================================ */

:root {
  /* 底与面 */
  --cream: #FFF3E0;
  --card: #FFFCF7;
  --board: #F2E6D6;
  --sunken: #FBEBD6;
  /* 墨色：暖棕，避开纯黑 */
  --ink: #3D2B1F;
  /* 二级、三级墨色都压到 4.5:1 以上：终审指出原来的 --ink-3 只有 2.4:1，
     却在承载 10~11px 的免责声明、备注和用量脚注 */
  --ink-2: #664B3A;
  --ink-3: #7F6250;
  /* 描边 */
  --line: #F0D9BC;
  --line-deep: #E3C49F;
  /* 糖果色 */
  --berry: #FF6B6B;
  --berry-deep: #E5503F;
  --mango: #FFC93C;
  --mango-deep: #E0A413;
  --mint: #4ECDC4;
  --mint-deep: #2FA79E;
  --sky: #7FC4E8;

  --font-ui: "MiSans", "HarmonyOS Sans SC", "PingFang SC", "Microsoft YaHei", "Segoe UI", system-ui, sans-serif;
  --font-mono: ui-monospace, "Cascadia Mono", "SF Mono", Consolas, "Courier New", monospace;

  --r: 14px;        /* 卡片圆角 */
  --r-sm: 10px;     /* 控件圆角 */
  --sticker: 0 3px 0 var(--line-deep);   /* 贴纸阴影：硬边不虚 */

  /* —— 贴纸材质 ——
     模切白边 + 一圈淡墨线 + 一点厚度 + 外投影，四层叠出"这张贴纸能撕下来"的错觉。
     所有面板、按钮、色块共用这一套，只有图纸本身不平（它是你要照抄的那张纸）。 */
  --die-cut:
    0 0 0 3px #FFFFFF,
    0 0 0 4.5px rgba(61, 43, 31, 0.16),
    0 5px 0 -1px rgba(61, 43, 31, 0.10),
    0 12px 20px -12px rgba(61, 43, 31, 0.5);
  --die-thin:
    0 0 0 2px #FFFFFF,
    0 0 0 3px rgba(61, 43, 31, 0.14),
    0 3px 0 -0.5px rgba(61, 43, 31, 0.10);
}

* { box-sizing: border-box; }

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

/* 浏览器自己的表面也要上色：选中、光标、滚动条 */
::selection { background: var(--mango); color: var(--ink); }
html { scrollbar-color: var(--line-deep) transparent; scrollbar-width: thin; }
input, textarea, select { caret-color: var(--berry); }

.viewport::-webkit-scrollbar, .mats::-webkit-scrollbar { width: 11px; height: 11px; }
.viewport::-webkit-scrollbar-track, .mats::-webkit-scrollbar-track { background: transparent; }
.viewport::-webkit-scrollbar-thumb, .mats::-webkit-scrollbar-thumb {
  background: var(--line-deep);
  border: 3px solid var(--sunken);
  border-radius: 10px;
}
.viewport::-webkit-scrollbar-thumb:hover, .mats::-webkit-scrollbar-thumb:hover { background: var(--berry); }

body {
  font-family: var(--font-ui);
  color: var(--ink);
  background-color: var(--cream);
  /* 淡淡的圆点底，像拼豆板 */
  background-image: radial-gradient(rgba(227, 196, 159, 0.55) 1.4px, transparent 1.5px);
  background-size: 22px 22px;
  -webkit-font-smoothing: antialiased;
  display: flex;
  flex-direction: column;
}

/* ---------------- 顶栏 ---------------- */
.topbar {
  flex: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 12px 20px;
  background: var(--card);
  border-bottom: 2px solid var(--line-deep);
}

.brand h1 {
  margin: 0;
  font-size: 22px;
  font-weight: 800;
  letter-spacing: 0.02em;
  display: flex;
  align-items: center;
  gap: 10px;
  /* 标题本身也做成一张贴纸：显示字面会随用户机器上的中文字体变，
     那就让「待遇」承担识别——模切标签 + 一点手歪 + 印刷描边 */
  align-self: flex-start;
  background: var(--mango);
  color: var(--ink);
  padding: 5px 16px 6px 8px;
  border-radius: 999px;
  box-shadow: 0 0 0 2.5px #fff, 0 0 0 4px rgba(61, 43, 31, 0.18), 0 3px 0 2px var(--mango-deep);
  transform: rotate(-1.1deg);
  text-shadow: 0 1px 0 rgba(255, 255, 255, 0.5);
}

/* 标题旁的两颗豆子，点明这是个拼豆工具 */
.brand h1::before {
  content: "";
  width: 20px; height: 20px;
  border-radius: 50%;
  background: var(--berry);
  box-shadow:
    inset 0 0 0 4px var(--card),
    inset 0 0 0 6px #00000022,
    0 2px 0 var(--berry-deep),
    16px 0 0 -1px var(--mango),
    16px 2px 0 -1px var(--mango-deep);
  margin-right: 6px;
}

.brand p {
  margin: 4px 0 0;
  font-size: 12.5px;
  color: var(--ink-2);
}

.readout { display: flex; align-items: flex-end; gap: 10px; }

.readout .ro {
  display: flex;
  flex-direction: column;
  align-items: center;
  line-height: 1.15;
  min-width: 74px;
  padding: 5px 10px;
  background: var(--sunken);
  border: 2px solid var(--line);
  border-radius: var(--r-sm);
}

.readout .ro b {
  font-family: var(--font-mono);
  font-size: 17px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.readout .ro span { font-size: 10.5px; color: var(--ink-2); margin-top: 1px; }

/* ---------------- 珠子条（签名元素） ---------------- */
.rail {
  display: flex;
  align-items: center;
  gap: 6px;
  overflow: hidden;
}

/* 珠子条只在有图纸时出现，并挂上「用色」标签——
   不然一排彩点会显得游离，看不出是干什么的 */
.topinfo { display: flex; align-items: center; gap: 14px; min-width: 0; }

.rail-wrap {
  display: none;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
  overflow: hidden;
}

.rail-wrap.is-on { display: flex; }

/* 顶栏的小豆入口：常驻，任何宽度都点得到 */
.topbar-dou {
  flex: none;
  font-weight: 800;
  background: var(--mango);
  box-shadow: var(--die-thin);
}
.topbar-dou:hover { background: #FFD968; }

.rail-label {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--ink-3);
}

.rail .bead {
  width: 16px; height: 16px;
  border-radius: 50%;
  flex: none;
  background: var(--line);
  box-shadow: inset 0 0 0 4px var(--card), inset 0 0 0 5.5px rgba(0,0,0,0.16), 0 2px 0 rgba(0,0,0,0.10);
}

.rail.is-live .bead { animation: bead-pop 460ms cubic-bezier(.25, 1, .5, 1) backwards; }
@keyframes bead-pop {
  0%   { transform: translateY(5px) scale(0.78); opacity: 0; }
  100% { transform: none; opacity: 1; }
}

/* ---------------- 三栏布局 ---------------- */
.layout {
  flex: 1;
  min-height: 0;
  display: grid;
  grid-template-columns: 300px minmax(0, 1fr) 296px;
  gap: 20px;
  padding: 18px;
}

/* 页面载入：贴纸一张张贴上来（编排一次，不是零散的 hover 小动作） */
@keyframes stick-on {
  0%   { opacity: 0; transform: translateY(14px) scale(0.985) rotate(0deg); }
  100% { opacity: 1; }
}

body.is-booting .layout > * { animation: stick-on 520ms cubic-bezier(.22,.9,.3,1) backwards; }
body.is-booting .layout > *:nth-child(1) { animation-delay: 40ms; }
body.is-booting .layout > *:nth-child(2) { animation-delay: 130ms; }
body.is-booting .layout > *:nth-child(3) { animation-delay: 220ms; }

.panel {
  background: var(--card);
  border: none;
  border-radius: var(--r);
  box-shadow: var(--die-cut);
  /* 手贴的贴纸不会端端正正；这点歪是这件作品的表情 */
  transform: rotate(var(--tilt, 0deg));
  display: flex;
  flex-direction: column;
  min-height: 0;
  overflow-y: auto;
  overflow-x: hidden;
}

.panel-left { --tilt: -0.35deg; }
.panel-right { --tilt: 0.4deg; }

.panel::-webkit-scrollbar { width: 10px; }
.panel::-webkit-scrollbar-thumb {
  background: var(--line);
  border: 3px solid var(--card);
  border-radius: 10px;
}

.block { padding: 15px 16px 17px; border-bottom: 2px dashed var(--line); }
.block:last-child { border-bottom: none; }
.block-grow { flex: 1; display: flex; flex-direction: column; min-height: 0; }

.block-title {
  margin: 0 0 12px;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.02em;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

/* 每个小标题前面一颗豆子，颜色循环——既是装饰也帮忙分段 */
.block-title::before {
  content: "";
  width: 12px; height: 12px;
  border-radius: 50%;
  background: var(--mango);
  box-shadow: inset 0 0 0 3px var(--card), inset 0 0 0 4.5px rgba(0,0,0,0.18);
  margin-right: -4px;
  flex: none;
}

.block-title span, .block-title em {
  font-style: normal;
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 11px;
  color: var(--ink-2);
  margin-left: auto;
}

.panel-left .block:nth-child(1) .block-title::before { background: var(--berry); }
.panel-left .block:nth-child(2) .block-title::before { background: var(--mint); }
.panel-left .block:nth-child(3) .block-title::before { background: var(--mango); }
.panel-left .block:nth-child(4) .block-title::before { background: var(--sky); }

.hint { margin: 8px 0 0; font-size: 11.5px; line-height: 1.6; color: var(--ink-2); }
.hint code {
  font-family: var(--font-mono);
  font-size: 11px;
  background: var(--sunken);
  border-radius: 5px;
  padding: 1px 5px;
}
.dim { color: var(--ink-3); }

.fineprint {
  margin: 0;
  padding: 13px 16px 16px;
  font-size: 11px;
  line-height: 1.65;
  color: var(--ink-3);
  border-top: 2px dashed var(--line);
}

/* ---------------- 控件 ---------------- */
.field { margin-bottom: 13px; }
.field:last-child { margin-bottom: 0; }

.field > label { display: block; font-size: 12px; font-weight: 600; color: var(--ink-2); margin-bottom: 6px; }
.field > label b { font-family: var(--font-mono); color: var(--ink); font-weight: 700; }

input[type="number"], select, textarea {
  width: 100%;
  font-family: var(--font-ui);
  font-size: 13px;
  color: var(--ink);
  background: var(--card);
  border: 2px solid var(--line);
  border-radius: var(--r-sm);
  padding: 8px 9px;
  outline: none;
  transition: border-color 120ms ease, box-shadow 120ms ease;
}

input[type="number"] { font-family: var(--font-mono); font-variant-numeric: tabular-nums; font-size: 14px; font-weight: 600; }
textarea { resize: vertical; line-height: 1.5; font-family: var(--font-mono); font-size: 12px; }

input[type="number"]:focus, select:focus, textarea:focus, button:focus-visible,
summary:focus-visible, .drop:focus-visible {
  outline: none;
  border-color: var(--mango-deep);
  box-shadow: 0 0 0 3px rgba(255, 201, 60, 0.5);
}

.row2 { display: grid; grid-template-columns: 1fr 1fr; gap: 9px; margin-bottom: 13px; }
.row2 .field { margin-bottom: 0; }

input[type="range"] { -webkit-appearance: none; appearance: none; width: 100%; height: 22px; background: transparent; cursor: pointer; }
input[type="range"]::-webkit-slider-runnable-track { height: 6px; background: var(--sunken); border: 2px solid var(--line); border-radius: 6px; }
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 18px; height: 18px;
  margin-top: -8px;
  border-radius: 50%;
  background: var(--mango);
  border: 2px solid var(--ink);
  box-shadow: 0 2px 0 var(--mango-deep);
}
input[type="range"]::-moz-range-track { height: 6px; background: var(--sunken); border: 2px solid var(--line); border-radius: 6px; }
input[type="range"]::-moz-range-thumb { width: 16px; height: 16px; border: 2px solid var(--ink); border-radius: 50%; background: var(--mango); }

/* 分段选择：像一排可以按下去的豆子 */
.seg {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: 1fr;
  gap: 4px;
  padding: 4px;
  background: var(--sunken);
  border: 2px solid var(--line);
  border-radius: var(--r-sm);
}

.seg-btn {
  font-family: var(--font-ui);
  font-size: 12px;
  font-weight: 600;
  color: var(--ink-2);
  background: transparent;
  border: none;
  border-radius: 7px;
  padding: 7px 4px;
  cursor: pointer;
  transition: background 120ms ease, color 120ms ease, transform 80ms ease;
}

.seg-btn:hover { background: var(--card); color: var(--ink); }
.seg-btn.is-on {
  /* 选中态统一用芒果黄：尺寸芯片、滑块、分段控件一个语义一个颜色，
     之前这里用薄荷青，在一片暖色里显得突兀，也和芯片的选中态对不上 */
  background: var(--mango);
  color: #6B4A00;
  box-shadow: 0 2px 0 var(--mango-deep);
}
.seg-btn:active { transform: translateY(2px); box-shadow: none; }
.seg-tool .seg-btn { padding: 6px 14px; }

/* 开关 */
.switch {
  display: flex;
  align-items: center;
  gap: 9px;
  font-size: 12.5px;
  color: var(--ink);
  margin-bottom: 10px;
  cursor: pointer;
  user-select: none;
}
.switch:last-child { margin-bottom: 0; }
.switch input { width: 17px; height: 17px; accent-color: var(--mint-deep); cursor: pointer; flex: none; }
.switch-inline { margin-bottom: 0; font-size: 12px; color: var(--ink-2); }

/* 按钮：贴纸式，按下去会压扁 */
.btn {
  font-family: var(--font-ui);
  font-size: 13px;
  font-weight: 600;
  color: var(--ink);
  background: var(--card);
  border: none;
  border-radius: var(--r-sm);
  box-shadow: var(--die-thin);
  padding: 9px 13px;
  cursor: pointer;
  transition: transform 80ms ease, box-shadow 80ms ease, background 120ms ease;
}

.btn:hover { background: #FFFDFA; transform: translateY(-1px); }
.btn:active { transform: translateY(1px); box-shadow: 0 0 0 2px #fff; }
.btn:disabled { opacity: 0.45; cursor: default; box-shadow: none; transform: none; }

.btn-primary {
  background: var(--berry);
  /* 白字在草莓红上只有 2.78:1，达不到正文要求；巧克力墨色是 4.84:1，
     也正是 PRODUCT.md 里记下的那条承诺 */
  color: var(--ink);
  box-shadow:
    0 0 0 3px #FFFFFF,
    0 0 0 4.5px rgba(61, 43, 31, 0.16),
    0 4px 0 0 var(--berry-deep);
}
.btn-primary:hover { background: #FF7C7C; }
.btn-primary:active { box-shadow: 0 0 0 3px #FFFFFF; }

.btn-quiet { background: transparent; border-color: transparent; box-shadow: none; color: var(--ink-2); }
.btn-quiet:hover { background: var(--sunken); border-color: transparent; }
.btn-sm { padding: 5px 10px; font-size: 12px; }

.stack { display: flex; flex-direction: column; gap: 9px; }
.row-btns { display: flex; gap: 8px; margin-top: 9px; flex-wrap: wrap; }

.icon-btn {
  width: 30px; height: 30px;
  display: grid; place-items: center;
  font-size: 16px; line-height: 1;
  color: var(--ink);
  background: var(--card);
  border: 2px solid var(--line);
  border-radius: 9px;
  box-shadow: 0 2px 0 var(--line-deep);
  cursor: pointer;
}
.icon-btn:hover { background: #FFFDFA; }
.icon-btn:active { transform: translateY(2px); box-shadow: none; }

/* 尺寸预设：糖果色小方块 */
.chips { display: flex; flex-wrap: wrap; gap: 7px; margin-bottom: 13px; }

.chip {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  color: var(--ink);
  background: var(--card);
  border: none;
  border-radius: var(--r-sm);
  padding: 7px 10px;
  box-shadow: var(--die-thin);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 1px;
  transition: transform 80ms ease, box-shadow 80ms ease, background 120ms ease;
}
.chip em { font-style: normal; font-family: var(--font-ui); font-size: 10px; color: var(--ink-3); font-weight: 500; }
.chip:hover { background: #FFFDFA; transform: translateY(-1px); }
.chip.is-on {
  background: var(--mango);
  box-shadow: 0 0 0 2px #fff, 0 0 0 3px rgba(61,43,31,0.16), 0 3px 0 0 var(--mango-deep);
}
.chip.is-on em { color: #7A5A0E; }

/* 折叠区 */
.fold { border-top: 2px dashed var(--line); padding-top: 12px; margin-top: 14px; }
.fold summary { font-size: 12.5px; font-weight: 600; color: var(--ink-2); cursor: pointer; list-style: none; display: flex; align-items: center; gap: 7px; }
.fold summary::-webkit-details-marker { display: none; }
.fold summary::before { content: "＋"; font-size: 13px; color: var(--berry); font-weight: 700; }
.fold[open] summary::before { content: "－"; }
.fold textarea { margin-top: 10px; }

/* ---------------- 插图的入口（重点） ---------------- */
.drop {
  position: relative;
  display: block;
  border: 2.5px dashed var(--line-deep);
  border-radius: var(--r);
  background: var(--sunken);
  padding: 18px 14px 17px;
  cursor: pointer;
  text-align: center;
  /* 左栏里最大的那张贴纸：模切白边 + 手歪 + 右下角翘起来 */
  --tilt: -0.7deg;
  transform: rotate(var(--tilt));
  box-shadow: var(--die-cut);
  transition: background 140ms ease, border-color 140ms ease, transform 140ms ease, box-shadow 140ms ease;
}

.drop:hover, .drop.is-over {
  border-color: var(--berry);
  background: #FFE9DC;
  transform: rotate(var(--tilt)) translateY(-3px) scale(1.006);
}

.drop.is-over { transform: scale(1.01); border-style: solid; }

/* 翘起的纸角：让「可以撕下来」这件事一眼可见 */
.drop::after {
  content: "";
  position: absolute;
  right: 0; bottom: 0;
  width: 30px; height: 30px;
  background: linear-gradient(135deg, transparent 49%, #fff 50%);
  border-bottom-right-radius: var(--r);
  filter: drop-shadow(-2px -2px 2px rgba(61, 43, 31, 0.18));
  pointer-events: none;
}

/* 用豆子拼出来的「＋」图标 */
.drop-icon {
  width: 56px; height: 56px;
  margin: 2px auto 10px;
  position: relative;
}
.drop-icon i {
  position: absolute;
  width: 16px; height: 16px;
  border-radius: 50%;
  background: var(--berry);
  box-shadow: inset 0 0 0 4px var(--sunken), inset 0 0 0 5.5px rgba(0,0,0,0.15), 0 2px 0 var(--berry-deep);
}
.drop-icon i:nth-child(1) { left: 20px; top: 0; }
.drop-icon i:nth-child(2) { left: 0; top: 20px; background: var(--mango); box-shadow: inset 0 0 0 4px var(--sunken), inset 0 0 0 5.5px rgba(0,0,0,0.15), 0 2px 0 var(--mango-deep); }
.drop-icon i:nth-child(3) { left: 20px; top: 20px; background: var(--mint); box-shadow: inset 0 0 0 4px var(--sunken), inset 0 0 0 5.5px rgba(0,0,0,0.15), 0 2px 0 var(--mint-deep); }
.drop-icon i:nth-child(4) { left: 40px; top: 20px; background: var(--sky); box-shadow: inset 0 0 0 4px var(--sunken), inset 0 0 0 5.5px rgba(0,0,0,0.15), 0 2px 0 #5FA8CC; }
.drop-icon i:nth-child(5) { left: 20px; top: 40px; background: var(--mango); box-shadow: inset 0 0 0 4px var(--sunken), inset 0 0 0 5.5px rgba(0,0,0,0.15), 0 2px 0 var(--mango-deep); }

.drop-inner { display: flex; flex-direction: column; gap: 5px; align-items: center; }
.drop-inner strong { font-size: 15px; font-weight: 800; }
.drop-inner span { font-size: 11.5px; color: var(--ink-2); line-height: 1.55; }

.drop-keys { display: flex; gap: 6px; justify-content: center; margin-top: 8px; flex-wrap: wrap; }

.drop-keys .key-group {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 11px;
  font-weight: 600;
  color: var(--ink-2);
}

.kbd {
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 600;
  color: var(--ink);
  background: var(--card);
  border: 2px solid var(--line);
  border-bottom-width: 3px;
  border-radius: 6px;
  padding: 2px 6px;
}

.drop-thumb { margin-bottom: 10px; background: var(--board); border: 2px solid var(--line); border-radius: var(--r-sm); padding: 8px; }
.drop-thumb img { max-width: 100%; max-height: 130px; display: block; margin: 0 auto; image-rendering: pixelated; }

/* 悬停时出现的「换一张」——传完图之后，入口依然看得见 */
.drop-swap {
  position: absolute;
  right: 10px; top: 10px;
  font-size: 11.5px;
  font-weight: 700;
  color: var(--ink);
  background: var(--mango);
  border: 2px solid var(--mango-deep);
  border-radius: 999px;
  padding: 3px 10px;
  opacity: 0;
  transition: opacity 140ms ease;
  pointer-events: none;
}
.drop:hover .drop-swap, .drop:focus-within .drop-swap { opacity: 1; }
/* 传过图之后「换一张」常驻：导入界面被缩略图取代，这个角标是唯一的路标 */
.drop.has-image .drop-swap { opacity: 1; }

.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

.drop-actions { display: flex; align-items: center; gap: 9px; margin-top: 10px; }
.drop-status { font-size: 11px; color: var(--ink-2); min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-weight: 600; }

/* ---------------- 取景 ---------------- */
.crop { margin-top: 13px; border-top: 2px dashed var(--line); padding-top: 12px; }
.crop-head { display: flex; align-items: center; justify-content: space-between; gap: 8px; margin-bottom: 8px; font-size: 12px; font-weight: 600; color: var(--ink-2); }
.crop-stage {
  position: relative;
  background: var(--board);
  border: 2px solid var(--line);
  border-radius: var(--r-sm);
  overflow: hidden;
  touch-action: none;
  cursor: crosshair;
  line-height: 0;
}
.crop-stage canvas { display: block; width: 100%; height: auto; }
.crop-rect {
  position: absolute;
  /* 白细线 + 深色遮罩：让「选中的区域」亮起来，而不是靠一圈高饱和边框去喊 */
  border: 2px solid rgba(255, 255, 255, 0.95);
  border-radius: 4px;
  box-shadow: 0 0 0 1.5px rgba(61, 43, 31, 0.4), 0 0 0 9999px rgba(61, 43, 31, 0.52);
  cursor: move;
}
.crop-rect::after {
  content: "";
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.4) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.4) 1px, transparent 1px);
  background-size: 33.33% 33.33%;
  background-position: -1px -1px;
  pointer-events: none;
}

/* ---------------- 示例 ---------------- */
.samples { margin-top: 13px; }
.samples-label { display: block; font-size: 11px; color: var(--ink-3); margin-bottom: 8px; font-weight: 600; }
.samples-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 7px; }

.sample-btn {
  font-size: 21px;
  line-height: 1;
  padding: 9px 0;
  background: var(--card);
  border: none;
  border-radius: var(--r-sm);
  box-shadow: var(--die-thin);
  cursor: pointer;
  transition: transform 90ms ease, box-shadow 90ms ease;
}
.sample-btn:hover { transform: translateY(-3px) rotate(-2deg); box-shadow: 0 0 0 2px #fff, 0 0 0 3px var(--mango), 0 5px 0 -1px var(--mango-deep); }
.sample-btn:active { transform: translateY(0) rotate(0); box-shadow: var(--die-thin); }

/* ---------------- 图纸台 ---------------- */
.stage {
  background: var(--card);
  border: none;
  border-radius: var(--r);
  /* 图纸台是唯一「平」的东西：一张摊开的纸，没有模切白边，只有纸边缘的阴影 */
  box-shadow: 0 1px 0 var(--line-deep), 0 14px 22px -16px rgba(61, 43, 31, 0.55);
  display: flex;
  flex-direction: column;
  position: relative;      /* 总览小图定位用 */
  min-height: 0;
  min-width: 0;
}

/* ---------------- 整幅总览（放大了才出现） ---------------- */
.mini {
  position: absolute;
  right: 14px;
  bottom: 14px;
  padding: 6px;
  background: var(--card);
  border: 2px solid var(--line);
  border-radius: 12px;
  box-shadow: 0 2px 0 var(--line-deep), 0 10px 18px -12px rgba(61, 43, 31, 0.8);
  cursor: pointer;
  z-index: 4;
  line-height: 0;
}
.mini:hover { border-color: var(--berry); }
.mini canvas { display: block; border-radius: 7px; }

.stage-bar {
  flex: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 12px;
  border-bottom: 2px dashed var(--line);
  flex-wrap: wrap;
}

.tools, .zoom { display: flex; align-items: center; gap: 9px; }

.zoom-val {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  color: var(--ink-2);
  min-width: 44px;
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.stage-note {
  font-family: var(--font-ui);
  font-size: 11.5px;
  font-weight: 700;
  color: #7A5A0E;
  background: #FFF1C9;
  border: 2px solid var(--mango);
  border-radius: 999px;
  padding: 4px 12px;
  margin-right: 4px;
  cursor: pointer;
}
.stage-note:hover { background: var(--mango); color: var(--ink); }

.viewport {
  position: relative;
  flex: 1;
  min-height: 0;
  overflow: auto;
  background:
    radial-gradient(rgba(227, 196, 159, 0.5) 1.4px, transparent 1.5px) 0 0 / 22px 22px,
    var(--sunken);
  padding: 18px;
  display: flex;
  align-items: flex-start;
  /* 不用 flex 居中：图纸比可视区大时，居中会让左边那半永远滚不到 */
  justify-content: flex-start;
}

#chart {
  display: block;
  background: var(--card);
  border-radius: 8px;
  box-shadow: 0 3px 0 var(--line-deep), 0 14px 26px -18px rgba(61, 43, 31, 0.7);
  max-width: none;
}

/* 3D 预览：拖图纸是在转模型，不能让浏览器把它当成滚动手势 */
#chart.is-3d { touch-action: none; cursor: grab; }
#chart.is-3d:active { cursor: grabbing; }

/* 图纸的「纸」：撑出滚动范围，本身承担纸面外观；canvas 粘在可视区左上角 */
.paper {
  position: relative;
  flex: none;          /* 别被 flex 压窄：图纸的尺寸就是它的尺寸 */
  margin: 0 auto;      /* 比容器小时居中；比容器大时自动归零，从左上开始滚 */
  line-height: 0;
  background: var(--card);
  border-radius: 8px;
  box-shadow: 0 3px 0 var(--line-deep), 0 14px 26px -18px rgba(61, 43, 31, 0.7);
}
/* 窗口模式：只画看得见的一块，纸的外观交给 .paper，
   canvas 自己不能再带边框阴影——不然会在可视区四周画出一圈框 */
.paper .chart-window {
  position: sticky;
  top: 0;
  left: 0;
  background: transparent;
  border-radius: 0;
  box-shadow: none;
}

.viewport[data-tool="paint"] #chart { cursor: crosshair; }
.viewport[data-tool="erase"] #chart { cursor: cell; }

.empty { position: relative; max-width: 340px; margin: 0 auto; padding: 26px 0; text-align: center; color: var(--ink-2); }

.empty-grid {
  width: 104px; height: 104px;
  margin: 0 auto 16px;
  background-image: radial-gradient(circle at center, #D9BC97 2.2px, transparent 2.4px);
  background-size: 13px 13px;
  background-color: var(--card);
  border: 2px solid var(--line);
  border-radius: 10px;
  box-shadow: 0 3px 0 var(--line-deep);
}

.empty h3 { margin: 0 0 6px; font-size: 16px; font-weight: 800; color: var(--ink); }
.empty p { margin: 0; font-size: 12.5px; line-height: 1.65; }

/* 手机上拖拽和 Ctrl+K 都用不了，空态里得有一个真按钮 */
.empty-pick { display: none; margin: 14px auto 0; }
@media (max-width: 880px) { .empty-pick { display: block; } }

/* 手机上把「选图」放在图纸页的工具条里：
   插图和看结果在同一页，不用切到参数页再切回来。桌面版左栏就有上传卡，不重复。 */
.stage-upload { display: none; }

/* 手机上「图片/取景」那一块可以整块收起来，把地方留给图纸 */
.stage-img-toggle { display: none; }
@media (max-width: 880px) {
  .stage-img-toggle { display: inline-block; }
  /* 「换图」是手机上的主操作：给到拇指尺寸，用主色，别缩在角落 */
  .stage-img-toggle {
    font-size: 18px;
    font-weight: 800;
    letter-spacing: .04em;
    padding: 16px 28px;
    min-height: 56px;
    background: var(--berry);
    color: var(--ink);
    box-shadow: 0 0 0 3px #fff, 0 0 0 4.5px rgba(61,43,31,.16), 0 4px 0 0 var(--berry-deep);
  }
  .stage-img-toggle:active { transform: translateY(2px); box-shadow: 0 0 0 3px #fff; }
  /* 手机上手指点不准单格，看/上色/擦除、撤销、只看选中色都不放出来——
     腾出的位置留给「换图」。要改单格请在电脑上用。 */
  .seg-tool, #undoBtn, .switch-inline { display: none; }
  body.is-img-collapsed .stage-upload { display: none !important; }
}

.loading {
  position: absolute;
  top: 16px; left: 50%;
  transform: translateX(-50%);
  font-size: 12.5px;
  font-weight: 700;
  color: var(--ink);
  background: var(--card);
  border: 2px solid var(--line);
  border-radius: 999px;
  box-shadow: 0 3px 0 var(--line-deep);
  padding: 7px 16px;
}

.tip {
  position: absolute;
  pointer-events: none;
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 600;
  line-height: 1.5;
  color: #fff;
  background: rgba(61, 43, 31, 0.94);
  border-radius: 8px;
  padding: 6px 9px;
  white-space: nowrap;
  z-index: 5;
}

/* ---------------- 材料清单 ---------------- */
.mats { list-style: none; margin: 0; padding: 0; overflow-y: auto; flex: 1; min-height: 0; }

.mat {
  display: grid;
  grid-template-columns: 40px 1fr auto;
  align-items: center;
  gap: 11px;
  padding: 10px 8px 10px 6px;
  border-bottom: 2px dashed var(--line);
  border-radius: 8px;
  cursor: pointer;
  transition: background 110ms ease;
}
.mat:hover { background: var(--sunken); }
.mat.is-on { background: #FFF1C9; }

.mat-sw {
  /* 直径由用量决定（用得越多越大）——尺寸本身就是信息，不是固定图标 */
  width: 30px; height: 30px;
  justify-self: center;
  border-radius: 50%;
  box-shadow: inset 0 0 0 4px var(--card), inset 0 0 0 6px rgba(0,0,0,0.18), 0 2px 0 rgba(0,0,0,0.12);
}

.mat-name { min-width: 0; }
.mat-name b { display: block; font-family: var(--font-mono); font-size: 12.5px; font-weight: 700; letter-spacing: 0.01em; }
.mat-name span { display: block; font-size: 11.5px; color: var(--ink-2); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; margin-top: 1px; }

/* 主信息是「要买几颗」，备货量退成浅一号的脚注——两个数一样重会看花眼 */
.mat-count { text-align: right; line-height: 1.25; }
.mat-count b { display: block; font-family: var(--font-mono); font-size: 16px; font-weight: 700; font-variant-numeric: tabular-nums; }
.mat-count span { display: block; font-size: 10px; color: var(--ink-3); font-family: var(--font-mono); font-weight: 500; margin-top: 1px; }

.mat.is-empty { opacity: 0.45; }
.mat.is-empty .mat-count span { color: var(--ink-3); }

/* ---------------- 窄屏 ---------------- */

/* ---------------- 小豆 ---------------- */
.dou-fab {
  position: fixed;
  right: 20px; bottom: 20px;
  z-index: 40;
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-ui);
  font-size: 14px;
  font-weight: 800;
  color: var(--ink);
  background: var(--mango);
  border: none;
  border-radius: 999px;
  padding: 11px 18px 11px 12px;
  cursor: pointer;
  box-shadow: 0 0 0 3px #fff, 0 0 0 4.5px rgba(61,43,31,.18), 0 4px 0 2px var(--mango-deep), 0 14px 20px -12px rgba(61,43,31,.6);
  transform: rotate(-1.5deg);
  transition: transform 120ms ease, box-shadow 120ms ease;
}
.dou-fab:hover { transform: rotate(-1.5deg) translateY(-2px); }
.dou-fab:active { transform: rotate(-1.5deg) translateY(2px); box-shadow: 0 0 0 3px #fff, 0 0 0 4.5px rgba(61,43,31,.18); }
.dou-fab-bead {
  width: 18px; height: 18px; border-radius: 50%;
  background: var(--berry);
  box-shadow: inset 0 0 0 4px var(--mango), inset 0 0 0 5.5px rgba(0,0,0,.2);
}

/* 呼吸光环：让按钮在满屏贴纸里也抓得住眼睛 */
.dou-fab::after {
  content: "";
  position: absolute;
  inset: -6px;
  border-radius: 999px;
  border: 2px solid var(--berry);
  opacity: 0;
  animation: dou-ring 2.6s ease-out infinite;
  pointer-events: none;
}
@keyframes dou-ring {
  0%   { transform: scale(.92); opacity: .55; }
  70%  { transform: scale(1.12); opacity: 0; }
  100% { transform: scale(1.12); opacity: 0; }
}

/* 引导气泡：第一次打开就摊开，告诉用户能问什么，点一条直接开问 */
.dou-nudge {
  position: fixed;
  right: 20px; bottom: 84px;
  z-index: 42;
  width: min(320px, calc(100vw - 40px));
  display: none;
  flex-direction: column;
  gap: 6px;
  background: var(--card);
  border-radius: var(--r);
  box-shadow: var(--die-cut);
  padding: 14px 14px 12px;
  transform: rotate(-.8deg);
}
.dou-nudge.is-on { display: flex; }
.dou-nudge b { font-size: 14px; font-weight: 800; padding-right: 22px; }
.dou-nudge > span { font-size: 11.5px; color: var(--ink-2); line-height: 1.6; }
.dou-nudge-ask { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 4px; }
.dou-nudge-x {
  position: absolute; right: 8px; top: 8px;
  font-size: 16px; line-height: 1; color: var(--ink-3);
  background: transparent; border: none; cursor: pointer; padding: 2px 4px;
}
.dou-nudge-x:hover { color: var(--berry); }

.dou-panel {
  position: fixed;
  right: 20px; bottom: 84px;
  z-index: 41;
  width: min(400px, calc(100vw - 32px));
  max-height: min(620px, calc(100vh - 120px));
  display: none;
  flex-direction: column;
  background: var(--card);
  border-radius: var(--r);
  box-shadow: var(--die-cut);
  transform: rotate(.35deg);
  overflow: hidden;
}
.dou-panel.is-open { display: flex; }

.dou-head {
  display: flex; align-items: flex-start; justify-content: space-between; gap: 10px;
  padding: 14px 14px 10px;
  background: var(--sunken);
  border-bottom: 2px dashed var(--line);
}
.dou-head h2 { margin: 0; font-size: 17px; font-weight: 800; }
.dou-head p { margin: 3px 0 0; font-size: 11.5px; color: var(--ink-2); }
.dou-close {
  font-size: 20px; line-height: 1; color: var(--ink-2);
  background: transparent; border: none; cursor: pointer; padding: 0 4px;
}
.dou-close:hover { color: var(--berry); }

.dou-badge {
  align-self: flex-start;
  margin: 10px 14px 0;
  font-family: var(--font-ui);
  font-size: 11px; font-weight: 700;
  border: none; border-radius: 999px;
  padding: 4px 12px;
  cursor: pointer;
}
.dou-badge.is-off { background: var(--sunken); color: var(--ink-2); box-shadow: 0 0 0 2px var(--line); }
.dou-badge.is-on { background: var(--mint); color: #10403C; box-shadow: 0 2px 0 var(--mint-deep); }
.dou-badge:hover { filter: brightness(1.04); }

.dou-note { margin: 8px 14px 0; font-size: 11px; line-height: 1.6; color: var(--ink-3); }

.dou-chips { display: flex; flex-wrap: wrap; gap: 6px; padding: 10px 14px 0; }
.dou-chip {
  font-family: var(--font-ui); font-size: 11.5px; font-weight: 600;
  color: var(--ink); background: var(--card);
  border: none; border-radius: 999px; padding: 5px 11px;
  box-shadow: var(--die-thin); cursor: pointer;
}
.dou-chip:hover { background: #FFF6E4; }

.dou-log { flex: 1; min-height: 120px; overflow-y: auto; padding: 12px 14px; display: flex; flex-direction: column; gap: 9px; }
.dou-log::-webkit-scrollbar { width: 11px; }
.dou-log::-webkit-scrollbar-thumb { background: var(--line-deep); border: 3px solid var(--card); border-radius: 10px; }

.dou-msg { font-size: 12.5px; line-height: 1.7; border-radius: 12px; padding: 9px 12px; max-width: 92%; }
.dou-me { align-self: flex-end; background: var(--mango); color: var(--ink); box-shadow: 0 2px 0 var(--mango-deep); }
.dou-dou { align-self: flex-start; background: var(--sunken); color: var(--ink); }
.dou-dou.is-online { background: #EAF9F6; box-shadow: 0 0 0 2px var(--mint); }
.dou-dou.is-warn { background: #FFF1C9; box-shadow: 0 0 0 2px var(--mango); }
.dou-dou.is-thinking { color: var(--ink-3); }

.dou-links { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 8px; }
.dou-link {
  font-family: var(--font-ui); font-size: 11px; font-weight: 600;
  color: var(--ink); text-decoration: none;
  background: var(--card); border: none; border-radius: 999px;
  padding: 4px 10px; box-shadow: var(--die-thin); cursor: pointer;
}
.dou-link:hover { background: #FFF6E4; }

.dou-input-row { display: flex; gap: 8px; padding: 10px 14px 14px; border-top: 2px dashed var(--line); }
.dou-input-row textarea { flex: 1; resize: none; min-height: 42px; max-height: 96px; }

@media (max-width: 880px) {
  /* 从底部页签进来的聊天：整个摊开，占满页签以上 */
  .dou-panel.is-mobile-full {
    right: 0; left: 0; bottom: var(--mtabs-h);
    width: auto;
    max-height: calc(100dvh - 118px);
    height: calc(100dvh - 118px);
    border-radius: 14px 14px 0 0;
    transform: none;
  }
}

@media (max-width: 1240px) {
  .layout {
    grid-template-columns: 300px minmax(0, 1fr);
    grid-template-rows: minmax(240px, 1fr) auto;
  }
  .panel-right { grid-column: 1 / -1; max-height: 380px; }
  .panel-right .mats { max-height: 220px; }
  /* 窄屏不把签名元素藏掉，改成换行让位：珠子条缩到品牌下面一行 */
  .topbar { flex-wrap: wrap; }
  .topinfo { width: 100%; justify-content: space-between; }
  .rail-wrap { flex: 1; min-width: 0; }
  .rail .bead { width: 13px; height: 13px; box-shadow: inset 0 0 0 3px var(--card), inset 0 0 0 4.5px rgba(0,0,0,0.16), 0 1.5px 0 rgba(0,0,0,0.10); }
}

@media (max-width: 880px) {
  /* ============ 手机端：四个页签，各自占满，整页不再滚动 ============
     之前是一页长滚动（图纸 → 2600px 参数 → 清单 → 导出），手机上来回翻很难受。
     现在图纸/参数/清单/小豆各占一屏，底部切换。 */
  :root { --mtabs-h: 58px; }
  body { height: 100dvh; overflow: hidden; }

  .topbar { flex-direction: row; align-items: center; gap: 8px; padding: 8px 10px; }
  .brand h1 { font-size: 17px; padding: 3px 10px 4px 6px; box-shadow: 0 0 0 2px #fff, 0 0 0 3px rgba(61,43,31,.18), 0 2px 0 1px var(--mango-deep); }
  .brand p { display: none; }
  .rail-wrap { display: none !important; }          /* 顶栏腾地方给数据 */
  .readout { margin-left: auto; gap: 6px; }
  .readout .ro { min-width: 0; padding: 3px 7px; }
  .readout .ro b { font-size: 14px; }
  .readout .ro span { font-size: 9px; }
  .readout .ro:nth-child(4) { display: none; }      /* 色差手机上不占位 */

  .layout {
    display: block;
    padding: 8px;
    height: calc(100dvh - 118px);
  }

  .panel-left, .stage, .panel-right { display: none; }
  body[data-pane="stage"] .stage { display: flex; height: 100%; }
  body[data-pane="params"] .panel-left { display: flex; height: 100%; overflow-y: auto; }
  body[data-pane="list"] .panel-right { display: flex; height: 100%; overflow: hidden; }

  .panel { min-height: 0; max-height: none; }
  .panel-left, .panel-right { max-height: none; }
  .panel-right .mats { flex: 1; max-height: none; }
  .viewport { padding: 10px; }
  .stage-bar { padding: 8px; gap: 8px; }
  .stage-note { font-size: 10.5px; padding: 3px 8px; }
  .samples-row { grid-template-columns: repeat(4, 1fr); }

  /* 图纸页最上面就是上传/取景，下面才是图纸——插图和生成结果同一屏 */
  .stage-upload {
    display: block;
    flex: none;
    max-height: 46%;
    overflow-y: auto;
    border-bottom: 2px dashed var(--line);
  }
  .stage-upload .block { border-bottom: none; padding: 10px 12px 12px; }
  .stage-upload .drop-icon { display: none; }      /* 手机上不占这 56px */
  .stage-upload .drop { padding: 12px; }
  /* 示例保留（不加载图片也能一键试），只是排成一行更省高度 */
  .stage-upload .samples { margin-top: 8px; }
  .stage-upload .samples-label { display: none; }
  .stage-upload .sample-btn { padding: 5px 0; font-size: 18px; }

  /* 底部页签 */
  .mtabs {
    position: fixed;
    left: 0; right: 0; bottom: 0;
    z-index: 45;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    height: var(--mtabs-h);
    background: var(--card);
    border-top: 2px solid var(--line);
    box-shadow: 0 -6px 18px -12px rgba(61,43,31,.6);
    padding-bottom: env(safe-area-inset-bottom);
  }
  .mtab {
    position: relative;
    font-family: var(--font-ui);
    font-size: 12.5px;
    font-weight: 700;
    color: var(--ink-2);
    background: transparent;
    border: none;
    cursor: pointer;
  }
  .mtab::before {
    content: "";
    position: absolute;
    top: 8px; left: 50%;
    transform: translateX(-50%);
    width: 18px; height: 18px;
    border-radius: 50%;
    background: var(--line);
    box-shadow: inset 0 0 0 4px var(--card), inset 0 0 0 5.5px rgba(0,0,0,.18);
  }
  .mtab span, .mtab { padding-top: 20px; }
  .mtab.is-on { color: var(--ink); }
  .mtab.is-on::before { background: var(--berry); box-shadow: inset 0 0 0 4px var(--card), inset 0 0 0 5.5px rgba(0,0,0,.18), 0 0 0 2px var(--mango); }

  /* 手机上有页签就够了，浮动按钮收起来 */
  /* 用 !important 压掉 .dou-nudge.is-on（那条优先级更高，
     之前没压住，气泡直接盖住了画布下半部分） */
  .dou-fab { display: none !important; }
  .dou-nudge, .dou-nudge.is-on { display: none !important; }

  /* 手机上别铺满：图片块一挤，图纸就没地方了 */
  .stage-upload { max-height: 34%; }
  /* 手机上缩放按钮要够大（拇指 44px 才按得准），顺便把图纸让出来 */
  .stage-bar { padding: 6px 8px; }
  .stage-bar .icon-btn { width: 40px; height: 40px; font-size: 20px; }
  .stage-bar .btn-sm { padding: 9px 12px; font-size: 13px; }
  .seg-tool .seg-btn { padding: 9px 12px; }
  .zoom { gap: 6px; }
  .zoom-val { min-width: 74px; font-size: 11.5px; }
  /* touch-action:none 才真正拦得住浏览器的整页缩放；
     图纸的平移和缩放由脚本接管（下面 app.js 里）。 */
  .viewport { touch-action: none; }
  #chart { transform-origin: center center; }
  .stage-upload .drop-keys { display: none; }       /* Ctrl+K 在手机上没意义 */
  .stage-upload .hint { font-size: 10.5px; line-height: 1.5; margin-top: 6px; }
  .crop-stage { max-width: 190px; margin: 0 auto; } /* 取景预览缩到拇指够得着 */
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}