/* IBM Plex Mono · 自托管子集 · SIL Open Font License 1.1
   只保留 latin / latin-ext：中文由系统字体回退，不需要 CJK 字库
   来源：Google Fonts（经 fonts.font.im 镜像取得），版权归 IBM 所有 */

@font-face {
  font-family: "IBM Plex Mono";
  font-style: normal;
  font-weight: 300;
  font-display: swap;
  src: url("fonts/plex-mono-300-latin-ext.woff2") format("woff2");
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C4, U+2113, U+2C60-2C7F, U+A720-A7FF;
}

@font-face {
  font-family: "IBM Plex Mono";
  font-style: normal;
  font-weight: 300;
  font-display: swap;
  src: url("fonts/plex-mono-300-latin.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

@font-face {
  font-family: "IBM Plex Mono";
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("fonts/plex-mono-400-latin-ext.woff2") format("woff2");
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C4, U+2113, U+2C60-2C7F, U+A720-A7FF;
}

@font-face {
  font-family: "IBM Plex Mono";
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("fonts/plex-mono-400-latin.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

@font-face {
  font-family: "IBM Plex Mono";
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url("fonts/plex-mono-500-latin-ext.woff2") format("woff2");
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C4, U+2113, U+2C60-2C7F, U+A720-A7FF;
}

@font-face {
  font-family: "IBM Plex Mono";
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url("fonts/plex-mono-500-latin.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

@font-face {
  font-family: "IBM Plex Mono";
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url("fonts/plex-mono-600-latin-ext.woff2") format("woff2");
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C4, U+2113, U+2C60-2C7F, U+A720-A7FF;
}

@font-face {
  font-family: "IBM Plex Mono";
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url("fonts/plex-mono-600-latin.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

/* ---------- 主题变量 ----------
   两套配色只换"操作区"的界面色，画布与导出结果完全不受影响。
   默认：暗房（近黑底 + 荧光绿）
   data-theme="paper"：纸本（白底 + 克莱因蓝 #002FA7）
*/
:root {
  --bg: #0b0b0e;
  --panel: #0d0d11;
  --panel-2: #111116;
  --panel-3: #15151b;
  --line: #23232a;
  --line-2: #1d1d24;
  --line-3: #33333d;
  --track: #34343e;

  --text: #f2f1ec;
  --text-2: #b9bdc6;
  --text-3: #75798a;
  --text-4: #5f6370;

  --accent: #d9ff3d;
  --accent-tint: #191b10;
  --accent-dim: #a8ad6a;
  --accent-active: #ffffff;

  /* 强调色块上的文字：暗房是绿底黑字，纸本是蓝底白字 */
  --chip-on-bg: #14141a;
  --chip-on-text: #d9ff3d;
  --on-accent: #121116;
  --check-line: #4c4c58;
  /* 字标后半截的色：暗房直接用荧光绿 */
  --brand-accent: #d9ff3d;

  --solid-bg: #121116;
  --solid-text: #f4f3ef;
  --solid-hover-bg: #d9ff3d;
  --solid-hover-text: #121116;
  --toast-bg: #121116;
  --toast-text: #d9ff3d;

  /* 看片台（印张区）——暗房下是暖灰看片台 */
  --stage: #e9e8e3;
  --stage-bar: #efeee9;
  --stage-bar-line: #d3d1c9;
  --stage-fg: #14141a;
  --stage-fg-2: #5e5d56;
  --stage-dot: rgba(20, 20, 26, 0.1);
  --stage-chip-line: #c3c1b8;
  --stage-chip-fg: #3d3c36;
  --stage-hover: #14141a;
  --stage-ghost-line: #bfbcb2;
  --stage-ghost-fg: #4a4943;
  --stage-empty-t: #c6c3b9;
  --stage-empty-s: #85837b;
  --stage-tag: #82807a;
  --stage-tag-bg: rgba(233, 232, 227, 0.7);

  --warn: #ff6a4d;
  --warn-line: #52342c;
}

html[data-theme="paper"] {
  --bg: #f7f8fb;
  --panel: #ffffff;
  --panel-2: #f6f8fd;
  --panel-3: #f6f8fd;
  /* 分隔线也带一点蓝，整块界面才是"一色印刷"，不会灰蓝打架 */
  --line: #dde2f0;
  --line-2: #edf0f8;
  --line-3: #ccd4e6;
  --track: #dfe4f0;

  /* 纸本是一色印刷：所有字都走克莱因蓝，靠明度分层，不再掺灰 */
  --text: #002fa7;
  --text-2: #2a4ba6;
  --text-3: #4a63ab;
  --text-4: #5b74b5;

  --accent: #002fa7;
  --accent-tint: rgba(0, 47, 167, 0.06);
  --accent-dim: #4a63ab;
  --accent-active: #001f70;

  --chip-on-bg: #002fa7;
  --chip-on-text: #ffffff;
  --on-accent: #ffffff;
  --check-line: #a8b6d6;
  /* 一色印刷里字标只有一种墨，后半截用同一种墨的浅网点（45% 覆盖）拉开层次 */
  --brand-accent: rgba(0, 47, 167, 0.45);

  --solid-bg: #002fa7;
  --solid-text: #ffffff;
  --solid-hover-bg: #001f70;
  --solid-hover-text: #ffffff;
  --toast-bg: #001f70;
  --toast-text: #ffffff;

  /* 纸本的看片台就是白纸 */
  --stage: #ffffff;
  --stage-bar: #ffffff;
  --stage-bar-line: #e3e7f3;
  --stage-fg: #002fa7;
  --stage-fg-2: #4a63ab;
  --stage-dot: rgba(0, 47, 167, 0.09);
  --stage-chip-line: #c2cdea;
  --stage-chip-fg: #002fa7;
  --stage-hover: #001f70;
  --stage-ghost-line: #c2cdea;
  --stage-ghost-fg: #002fa7;
  --stage-empty-t: #d5ddf0;
  --stage-empty-s: #5b74b5;
  --stage-tag: #5b74b5;
  --stage-tag-bg: rgba(255, 255, 255, 0.75);

  --warn: #c0392b;
  --warn-line: #e6c4bd;
}

/* 纸本的笔画整体加一点点粗：300→400，小标题 400→500，字标 500→600 */
html[data-theme="paper"] body { font-weight: 400; }
html[data-theme="paper"] .sec-h { font-weight: 500; }
html[data-theme="paper"] .brand-mark { font-weight: 600; }

* { box-sizing: border-box; }

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

body {
  background: var(--bg);
  color: var(--text);
  font-family: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, "PingFang SC", "Microsoft YaHei", monospace;
  font-weight: 300;
  -webkit-font-smoothing: antialiased;
  overflow: hidden;
  transition: background-color 0.2s ease, color 0.2s ease;
}

button, input, select { font: inherit; color: inherit; }

.app {
  height: 100vh;
  display: grid;
  grid-template-columns: 292px minmax(0, 1fr) 312px;
}

.panel {
  background: var(--panel);
  display: flex;
  flex-direction: column;
  min-height: 0;
  transition: background-color 0.2s ease;
}

.left { border-right: 1px solid var(--line); }
.right { border-left: 1px solid var(--line); }

.brand {
  padding: 22px 22px 16px;
  border-bottom: 1px solid var(--line);
}

.brand-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 10px;
}

.brand-mark {
  font-size: 26px;
  font-weight: 500;
  letter-spacing: -0.06em;
  line-height: 1;
}

.brand-mark span { color: var(--brand-accent); }

.brand-sub {
  margin-top: 8px;
  font-size: 9px;
  letter-spacing: 0.22em;
  color: var(--text-3);
}

.brand-cn {
  margin-top: 10px;
  font-size: 11px;
  color: var(--text-2);
  letter-spacing: 0.04em;
}

/* 界面配色切换：两颗小方块，选中那颗填强调色 */
.theme-sw {
  display: flex;
  gap: 4px;
  flex: 0 0 auto;
  margin-top: 3px;
}

.tbtn {
  width: 22px;
  height: 22px;
  padding: 0;
  display: grid;
  place-items: center;
  background: transparent;
  border: 1px solid var(--line-3);
  border-radius: 2px;
  cursor: pointer;
  transition: border-color 0.14s ease;
}

.tbtn:hover { border-color: var(--accent); }

.tbtn i {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  border: 1px solid rgba(0, 0, 0, 0.25);
  background: var(--dot, #0d0d11);
}

.tbtn[data-t="dark"] { --dot: #0d0d11; }
.tbtn[data-t="paper"] { --dot: #ffffff; }
.tbtn[data-t="paper"] i { border-color: rgba(0, 0, 0, 0.3); }

.tbtn.on { border-color: var(--accent); box-shadow: inset 0 0 0 2px var(--panel), 0 0 0 1px var(--accent); }

.scroll {
  flex: 1 1 auto;
  min-height: 0;
  overflow-y: auto;
  overflow-x: hidden;
}

.scroll::-webkit-scrollbar { width: 6px; }
.scroll::-webkit-scrollbar-thumb { background: var(--line-3); border-radius: 3px; }
.scroll::-webkit-scrollbar-track { background: transparent; }

.sec {
  padding: 16px 22px 18px;
  border-bottom: 1px solid var(--line-2);
}

.panel-head {
  padding: 16px 22px 18px;
  border-bottom: 1px solid var(--line-2);
}

.sec-h {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 12px;
  font-size: 9px;
  font-weight: 400;
  letter-spacing: 0.2em;
  color: var(--text-3);
  text-transform: uppercase;
}

.sec-h span { color: var(--accent); }

.drop {
  position: relative;
  display: grid;
  place-items: center;
  height: 108px;
  border: 1px dashed var(--line-3);
  background: var(--panel-2);
  cursor: pointer;
  transition: border-color 0.16s ease, background 0.16s ease;
}

.drop:hover, .drop.drag {
  border-color: var(--accent);
  background: var(--accent-tint);
}

.drop input {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
}

.drop-inner { text-align: center; transform: translateY(1px); }

.drop-t {
  font-size: 34px;
  line-height: 1;
  letter-spacing: -0.06em;
}

.drop-s {
  margin-top: 8px;
  font-size: 9px;
  letter-spacing: 0.1em;
  color: var(--text-3);
}

.ghost {
  width: 100%;
  margin-top: 8px;
  padding: 8px;
  background: transparent;
  border: 1px solid var(--line-3);
  color: var(--text-2);
  font-size: 10px;
  letter-spacing: 0.08em;
  cursor: pointer;
  transition: border-color 0.16s ease, color 0.16s ease;
}

.ghost:hover { border-color: var(--accent); color: var(--accent); }

.ghost.sm { width: auto; margin: 0; padding: 0 10px; white-space: nowrap; }

.hint {
  margin-top: 10px;
  font-size: 10px;
  line-height: 1.6;
  color: var(--text-3);
}

.presets {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
}

.preset {
  padding: 9px 10px;
  text-align: left;
  background: var(--panel-2);
  border: 1px solid var(--line);
  cursor: pointer;
  transition: border-color 0.14s ease, background 0.14s ease;
}

.preset:hover { border-color: var(--text-3); }

.preset.on {
  border-color: var(--accent);
  background: var(--accent-tint);
}

.preset small {
  display: block;
  margin-top: 3px;
  font-size: 9px;
  color: var(--text-3);
}

.preset.on small { color: var(--accent-dim); }

.swatch-row {
  display: grid;
  grid-template-columns: 54px 26px 1fr;
  align-items: center;
  gap: 10px;
  padding: 5px 0;
  font-size: 10px;
  letter-spacing: 0.06em;
  color: var(--text-3);
  cursor: pointer;
}

.swatch-row i {
  font-style: normal;
  font-size: 10px;
  color: var(--text-2);
  letter-spacing: 0.02em;
}

input[type="color"] {
  width: 24px;
  height: 24px;
  padding: 0;
  border: 1px solid var(--line-3);
  border-radius: 2px;
  background: none;
  cursor: pointer;
}

input[type="color"]::-webkit-color-swatch-wrapper { padding: 2px; }
input[type="color"]::-webkit-color-swatch { border: none; border-radius: 1px; }

.check {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 12px;
  font-size: 10px;
  line-height: 1.5;
  color: var(--text-2);
  cursor: pointer;
}

/* 复选框自绘：原生那个灰框在纯白/纯蓝的界面里会脱色 */
.check input[type="checkbox"] {
  -webkit-appearance: none;
  appearance: none;
  flex: 0 0 auto;
  width: 12px;
  height: 12px;
  margin: 0;
  position: relative;
  border: 1px solid var(--check-line);
  border-radius: 1px;
  background: transparent;
  cursor: pointer;
  transition: background-color 0.14s ease, border-color 0.14s ease;
}

.check input[type="checkbox"]:hover { border-color: var(--accent); }

.check input[type="checkbox"]:checked {
  background: var(--accent);
  border-color: var(--accent);
}

.check input[type="checkbox"]:checked::after {
  content: '';
  position: absolute;
  left: 1px;
  right: 1px;
  top: 1px;
  bottom: 1px;
  background: var(--on-accent);
  clip-path: polygon(14% 46%, 6% 55%, 39% 86%, 96% 24%, 88% 15%, 38% 69%);
}

.stage {
  display: flex;
  flex-direction: column;
  min-width: 0;
  background: var(--stage);
  transition: background-color 0.2s ease;
}

.stage-top {
  flex: 0 0 auto;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 0 14px;
  background: var(--stage-bar);
  border-bottom: 1px solid var(--stage-bar-line);
  color: var(--stage-fg);
}

.file-name {
  font-size: 10px;
  letter-spacing: 0.1em;
  color: var(--stage-fg-2);
  text-transform: uppercase;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.stage-actions {
  display: flex;
  align-items: center;
  gap: 6px;
  flex: 0 0 auto;
}

.chip {
  padding: 6px 9px;
  background: transparent;
  border: 1px solid var(--stage-chip-line);
  border-radius: 2px;
  color: var(--stage-chip-fg);
  font-size: 10px;
  letter-spacing: 0.03em;
  cursor: pointer;
  transition: border-color 0.14s ease, color 0.14s ease, background 0.14s ease;
}

.chip:hover { border-color: var(--stage-hover); color: var(--stage-hover); }

.stage-actions .chip.on {
  border-color: var(--chip-on-bg);
  background: var(--chip-on-bg);
  color: var(--chip-on-text);
}

.sel {
  width: 100%;
  padding: 8px;
  background: var(--panel-3);
  color: var(--text);
  border: 1px solid var(--line-3);
  border-radius: 2px;
  font-size: 10px;
  letter-spacing: 0.02em;
  cursor: pointer;
}

.sel:focus { outline: 1px solid var(--accent); }

.num {
  width: 100%;
  padding: 7px 8px;
  background: var(--panel-3);
  color: var(--text);
  border: 1px solid var(--line-3);
  border-radius: 2px;
  font-size: 11px;
}

.num:focus { outline: 1px solid var(--accent); }

.out-spec {
  margin-top: 12px;
  padding: 10px;
  background: var(--panel-2);
  border: 1px solid var(--line);
  font-size: 9.5px;
  line-height: 1.8;
  letter-spacing: 0.04em;
  color: var(--text-2);
}

.out-spec b { color: var(--accent); font-weight: 400; }

.out-spec .warnline { color: var(--warn); }

.out-spec.warn { border-color: var(--warn-line); }

/* 选区列表：一行一个框，点行选中、点 × 删除 */
.rg-list {
  display: flex;
  flex-direction: column;
  gap: 3px;
  margin-top: 6px;
}

.rg-empty {
  padding: 9px 10px;
  font-size: 9.5px;
  letter-spacing: 0.04em;
  color: var(--text-3);
  border: 1px dashed var(--line);
}

.rg-item {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 6px 7px;
  background: var(--panel-2);
  border: 1px solid var(--line);
  font-size: 9.5px;
  letter-spacing: 0.04em;
  color: var(--text-2);
  cursor: pointer;
  transition: border-color 0.12s ease, background 0.12s ease;
}

.rg-item:hover { border-color: var(--text-3); }

.rg-item.on {
  border-color: var(--accent);
  background: var(--accent-tint);
  color: var(--text);
}

.rg-n {
  font-style: normal;
  width: 15px;
  flex: 0 0 auto;
  font-size: 9px;
  color: var(--accent);
  opacity: 0.8;
}

.rg-m { flex: 1 1 auto; }
.rg-s { flex: 0 0 auto; font-size: 9px; color: var(--text-3); }
.rg-item.on .rg-s { color: var(--text-2); }

.rg-x {
  flex: 0 0 auto;
  width: 16px;
  height: 16px;
  padding: 0;
  border: none;
  background: none;
  color: var(--text-3);
  font-size: 13px;
  line-height: 1;
  cursor: pointer;
}

.rg-x:hover { color: var(--warn); }

.panel-acts {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 10px;
}

.panel .chip {
  flex: 1 1 auto;
  border-color: var(--line-3);
  color: var(--text-2);
  padding: 7px 8px;
  white-space: nowrap;
}

.panel .chip:hover { border-color: var(--text-3); color: var(--text); }

.panel .chip.on {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-tint);
}

.panel .chip:disabled {
  opacity: 0.35;
  cursor: default;
  border-color: var(--line);
  color: var(--text-3);
}

.solid {
  padding: 7px 12px;
  background: var(--solid-bg);
  color: var(--solid-text);
  border: 1px solid var(--solid-bg);
  border-radius: 2px;
  font-size: 10px;
  letter-spacing: 0.04em;
  cursor: pointer;
  transition: background-color 0.14s ease, color 0.14s ease, border-color 0.14s ease;
}

.solid:hover {
  background: var(--solid-hover-bg);
  color: var(--solid-hover-text);
  border-color: var(--solid-hover-bg);
}

/* 看片台恒为浅色印张区，纸本下才整体转白 */
.canvas-wrap {
  position: relative;
  flex: 1 1 auto;
  min-height: 0;
  background-color: var(--stage);
  background-image: radial-gradient(circle, var(--stage-dot) 0.8px, transparent 0.9px);
  background-size: 14px 14px;
  overflow: hidden;
  touch-action: none;
}

canvas#view { display: block; width: 100%; height: 100%; cursor: ew-resize; }

.canvas-wrap.region-mode canvas#view { cursor: crosshair; }

.tag {
  position: absolute;
  top: 10px;
  font-size: 9px;
  letter-spacing: 0.16em;
  color: var(--stage-tag);
  pointer-events: none;
  background: var(--stage-tag-bg);
  padding: 2px 5px;
  display: none;
}

.canvas-wrap.hasimg .tag { display: block; }

.tag-l { left: 12px; }
.tag-r { right: 12px; }

.empty {
  position: absolute;
  inset: 0;
  display: grid;
  place-content: center;
  justify-items: center;
  gap: 16px;
  text-align: center;
  background: var(--stage);
  cursor: pointer;
}

.empty.hide { display: none; }

.empty-t {
  font-size: 72px;
  line-height: 0.9;
  letter-spacing: -0.07em;
  color: var(--stage-empty-t);
}

.empty-s {
  max-width: 320px;
  font-size: 10px;
  line-height: 1.7;
  color: var(--stage-empty-s);
}

.empty .ghost {
  width: auto;
  padding: 8px 18px;
  border-color: var(--stage-ghost-line);
  color: var(--stage-ghost-fg);
}

.empty .ghost:hover { border-color: var(--stage-hover); color: var(--stage-hover); }

.stage-bot {
  flex: 0 0 auto;
  height: 30px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 14px;
  background: var(--stage-bar);
  border-top: 1px solid var(--stage-bar-line);
  font-size: 9px;
  letter-spacing: 0.1em;
  color: var(--stage-fg-2);
}

.mono-dim { color: var(--stage-fg-2); }

.row { padding: 9px 0; border-bottom: 1px dashed var(--line-2); }
.row:last-child { border-bottom: 0; padding-bottom: 2px; }

.row-h {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 7px;
  font-size: 10px;
  letter-spacing: 0.04em;
  color: var(--text-2);
}

.row-h i {
  font-style: normal;
  font-size: 10px;
  color: var(--text-3);
  letter-spacing: 0;
}

input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 12px;
  background: transparent;
  cursor: pointer;
}

input[type="range"]::-webkit-slider-runnable-track {
  height: 2px;
  background: var(--track);
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 9px;
  height: 14px;
  margin-top: -6px;
  background: var(--accent);
  border-radius: 1px;
}

input[type="range"]:active::-webkit-slider-thumb { background: var(--accent-active); }

select#algo {
  width: 100%;
  padding: 9px 8px;
  background: var(--panel-3);
  color: var(--text);
  border: 1px solid var(--line-3);
  border-radius: 2px;
  font-size: 11px;
  letter-spacing: 0.02em;
  cursor: pointer;
}

select#algo:focus { outline: 1px solid var(--accent); }

.seed-row { display: flex; align-items: center; gap: 10px; }
.seed-row input { flex: 1 1 auto; }

.panel-foot {
  flex: 0 0 auto;
  display: flex;
  justify-content: space-between;
  padding: 12px 22px;
  border-top: 1px solid var(--line-2);
  font-size: 9px;
  letter-spacing: 0.1em;
  color: var(--text-4);
}

.panel-foot .mono-dim { color: var(--text-4); }

.toast {
  position: fixed;
  left: 50%;
  bottom: 46px;
  transform: translate(-50%, 12px);
  padding: 9px 16px;
  background: var(--toast-bg);
  color: var(--toast-text);
  border: 1px solid var(--line-3);
  font-size: 10px;
  letter-spacing: 0.08em;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.toast.show { opacity: 1; transform: translate(-50%, 0); }

@media (max-width: 980px) {
  body { overflow: auto; }
  .app {
    height: auto;
    min-height: 100vh;
    grid-template-columns: 1fr;
    grid-template-rows: auto auto auto;
  }
  .left { border-right: 0; border-bottom: 1px solid var(--line); }
  .right { border-left: 0; border-top: 1px solid var(--line); }
  .canvas-wrap { height: 58vh; }
  .scroll { overflow: visible; }
}