:root {
  --bg: #f6f1ec;
  --panel: #fffdfb;
  --panel-2: #f3ece5;
  --ink: #2b2420;
  --muted: #7b6f66;
  --line: #e4d9cf;
  --accent: #c2410c;
  --accent-ink: #ffffff;
  --accent-soft: #fde4d4;
  --stage: #ebe3db;
  --shadow: 0 1px 2px rgb(60 40 20 / .08), 0 6px 20px rgb(60 40 20 / .08);
  --radius: 10px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #1c1916; --panel: #24201c; --panel-2: #2d2823; --ink: #f1ebe5; --muted: #a99d92;
    --line: #3b342e; --accent: #fb923c; --accent-ink: #1c1916; --accent-soft: #4a2c1a; --stage: #141210;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #1c1916; --panel: #24201c; --panel-2: #2d2823; --ink: #f1ebe5; --muted: #a99d92;
  --line: #3b342e; --accent: #fb923c; --accent-ink: #1c1916; --accent-soft: #4a2c1a; --stage: #141210;
  color-scheme: dark;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html, body { height: 100%; margin: 0; }
body {
  display: grid; grid-template-rows: auto auto 1fr; overflow: hidden;
  background: var(--bg); color: var(--ink);
  font: 14px/1.4 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
button, input, select { font: inherit; color: inherit; }
kbd {
  font: 11px ui-monospace, SFMono-Regular, Menlo, monospace; padding: 1px 5px; border-radius: 4px;
  border: 1px solid var(--line); background: var(--panel-2); color: var(--muted);
}
.muted { color: var(--muted); } .small { font-size: 12px; }
.row { display: flex; align-items: center; flex-wrap: wrap; } .gap { gap: 6px; } .end { justify-content: flex-end; }

/* top bar */
.topbar {
  display: flex; align-items: center; gap: 10px; padding: 8px 12px;
  background: var(--panel); border-bottom: 1px solid var(--line);
}
.brand { display: flex; align-items: center; gap: 8px; font-weight: 700; font-size: 17px; letter-spacing: .2px; white-space: nowrap; }
.brand img { image-rendering: pixelated; }
.doc-name {
  min-width: 0; flex: 1 1 160px; max-width: 320px; border: 1px solid transparent; background: transparent;
  border-radius: 6px; padding: 4px 8px; color: var(--muted);
}
.doc-name:hover, .doc-name:focus { border-color: var(--line); background: var(--panel-2); color: var(--ink); outline: none; }
.menu { display: flex; align-items: center; gap: 4px; margin-left: auto; }
.sep { width: 1px; height: 22px; background: var(--line); margin: 0 4px; }

.btn, .icon-btn, .zoom-label {
  border: 1px solid var(--line); background: var(--panel); border-radius: 8px; cursor: pointer;
  padding: 6px 12px; line-height: 1.2; white-space: nowrap;
}
.btn:hover, .icon-btn:hover, .zoom-label:hover { background: var(--panel-2); }
.btn.sm { padding: 4px 9px; font-size: 13px; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); font-weight: 600; }
.btn.primary:hover { filter: brightness(1.06); background: var(--accent); }
.btn.toggle[aria-pressed="true"] { background: var(--accent-soft); border-color: var(--accent); font-weight: 600; }
.icon-btn { width: 34px; height: 34px; padding: 0; font-size: 17px; display: inline-grid; place-items: center; }
.zoom-label { min-width: 62px; font-variant-numeric: tabular-nums; }
.lang-select {
  height: 34px; padding: 0 6px; border: 1px solid var(--line); border-radius: 8px;
  background: var(--panel); cursor: pointer; font-size: 13px; font-weight: 600;
}
.only-mobile { display: none; }
.donate {
  display: inline-flex; align-items: center; gap: 2px; text-decoration: none; margin-left: 4px;
  background: #ff5e5b; border-color: #ff5e5b; color: #fff; font-weight: 600;
}
.donate:hover { background: #ff5e5b; filter: brightness(1.07); }
.help a { color: var(--accent); }

.dropdown { position: relative; }
.dropdown-menu {
  display: none; position: absolute; top: calc(100% + 4px); left: 0; z-index: 30; min-width: 230px;
  background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); padding: 6px;
}
.dropdown.open .dropdown-menu { display: block; }
.dropdown-menu button {
  display: flex; justify-content: space-between; gap: 12px; width: 100%; text-align: left;
  border: 0; background: none; padding: 7px 10px; border-radius: 6px; cursor: pointer;
}
.dropdown-menu button:hover { background: var(--panel-2); }
.dropdown-menu hr { border: 0; border-top: 1px solid var(--line); margin: 5px 0; }

/* toolbar */
.toolbar {
  display: flex; flex-wrap: wrap; align-items: center; gap: 8px 16px; padding: 6px 12px;
  background: var(--panel); border-bottom: 1px solid var(--line);
}
.tool-group { display: flex; align-items: center; gap: 4px; flex-wrap: wrap; }
#tools button {
  display: grid; justify-items: center; gap: 1px; width: 52px; padding: 4px 0 3px; cursor: pointer;
  border: 1px solid transparent; border-radius: 8px; background: none;
}
#tools button span { font-size: 18px; line-height: 1; }
#tools button small { font-size: 10.5px; color: var(--muted); }
#tools button:hover { background: var(--panel-2); }
#tools button.active { background: var(--accent-soft); border-color: var(--accent); }
#tools button.active small { color: var(--ink); }
.current { display: flex; align-items: center; gap: 8px; padding: 2px 10px 2px 4px; border: 1px solid var(--line); border-radius: 8px; min-width: 150px; }
.current div { display: grid; line-height: 1.15; } .current small { color: var(--muted); font-size: 11px; max-width: 150px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.color-chip { width: 34px; height: 34px; border-radius: 8px; border: 1px solid var(--line); overflow: hidden; cursor: pointer; display: block; }
.color-chip input { width: 150%; height: 150%; margin: -25%; border: 0; padding: 0; cursor: pointer; }
.rot-label { min-width: 34px; text-align: center; font-variant-numeric: tabular-nums; color: var(--muted); }
.seg { display: inline-flex; border: 1px solid var(--line); border-radius: 8px; overflow: hidden; }
.seg button { border: 0; background: none; padding: 6px 9px; cursor: pointer; font-size: 12.5px; }
.seg button + button { border-left: 1px solid var(--line); }
.seg button.active { background: var(--accent-soft); font-weight: 600; }
.sel-actions { padding-left: 8px; border-left: 1px solid var(--line); }
.counter { gap: 4px; padding: 2px 4px; border: 1px solid var(--line); border-radius: 8px; }
.counter .icon-btn { width: 30px; height: 30px; font-size: 15px; }
.counter .btn.primary { height: 30px; padding: 0 12px; font-variant-numeric: tabular-nums; }
.counter-val { display: grid; justify-items: center; line-height: 1.05; min-width: 44px; }
.counter-val small { font-size: 10.5px; color: var(--muted); }
.counter-val b { font-size: 17px; font-variant-numeric: tabular-nums; }
button:disabled { opacity: .45; cursor: default; }

/* layout */
.workspace { display: grid; grid-template-columns: 260px 1fr 300px; min-height: 0; }
.panel { background: var(--panel); overflow: auto; min-height: 0; }
.panel.left { border-right: 1px solid var(--line); }
.panel.right { border-left: 1px solid var(--line); }
.panel-head { position: sticky; top: 0; z-index: 2; background: var(--panel); padding: 10px; border-bottom: 1px solid var(--line); }
.panel-head input { width: 100%; padding: 7px 10px; border: 1px solid var(--line); border-radius: 8px; background: var(--panel-2); }

.library { padding: 4px 10px 16px; }
.library h3 { font-size: 11.5px; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); margin: 14px 2px 6px; font-weight: 600; }
.sym-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 5px; }
.sym {
  aspect-ratio: 1; display: grid; grid-template-rows: 1fr auto; justify-items: center; align-items: center;
  border: 1px solid var(--line); border-radius: 8px; background: var(--panel); cursor: pointer; padding: 4px 2px 3px; min-width: 0;
}
.sym svg { width: 70%; height: 100%; max-height: 36px; color: var(--ink); }
.sym small { font-size: 10px; color: var(--muted); max-width: 100%; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; padding: 0 2px; }
.sym:hover { background: var(--panel-2); }
.sym.active { border-color: var(--accent); background: var(--accent-soft); box-shadow: inset 0 0 0 1px var(--accent); }

.stage { position: relative; min-width: 0; min-height: 0; background: var(--stage); overflow: hidden; }
#chart { position: absolute; inset: 0 0 26px 0; width: 100%; height: calc(100% - 26px); touch-action: none; outline: none; display: block; }
.statusbar {
  position: absolute; left: 0; right: 0; bottom: 0; height: 26px; display: flex; justify-content: space-between; gap: 12px;
  padding: 4px 12px; font-size: 12px; color: var(--muted); background: var(--panel); border-top: 1px solid var(--line);
  white-space: nowrap; overflow: hidden;
}
.hint {
  position: absolute; top: 12px; left: 50%; transform: translateX(-50%); z-index: 3;
  background: var(--ink); color: var(--bg); padding: 6px 12px; border-radius: 99px; font-size: 13px; box-shadow: var(--shadow);
}

details { border-bottom: 1px solid var(--line); }
summary { cursor: pointer; padding: 11px 14px; font-weight: 600; list-style: none; user-select: none; }
summary::-webkit-details-marker { display: none; }
summary::after { content: "▸"; float: right; color: var(--muted); transition: transform .15s; }
details[open] summary::after { transform: rotate(90deg); }
details > :not(summary) { margin: 0 14px 12px; }

.swatches { display: grid; grid-template-columns: repeat(8, 1fr); gap: 5px; margin-bottom: 10px !important; }
.swatch { aspect-ratio: 1; border-radius: 6px; border: 1px solid rgb(0 0 0 / .15); cursor: pointer; padding: 0; }
.swatch.active { outline: 2px solid var(--accent); outline-offset: 1px; }

.form { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.form > div:not(.info) { display: contents; }
.form label { display: grid; gap: 3px; font-size: 12px; color: var(--muted); }
.form label.wide, .form .info, .form > .btn, .form .row { grid-column: 1 / -1; }
.form label.check { display: flex; align-items: center; gap: 6px; color: var(--ink); font-size: 13px; grid-column: 1 / -1; }
.form input[type=number], .form input[type=text], .form select {
  width: 100%; padding: 5px 8px; border: 1px solid var(--line); border-radius: 6px; background: var(--panel-2); color: var(--ink);
}
.form input[type=color] { width: 100%; height: 30px; border: 1px solid var(--line); border-radius: 6px; padding: 2px; background: var(--panel-2); }
.form input[type=range] { width: 100%; accent-color: var(--accent); }
.form .btn { justify-self: start; }
.info { font-size: 12px; color: var(--muted); }
#repeatBox { margin-top: 12px; padding-top: 10px; border-top: 1px dashed var(--line); }

.legend { display: grid; gap: 4px; }
.legend .item { display: grid; grid-template-columns: 30px 1fr; align-items: center; gap: 8px; }
.legend svg { width: 28px; height: 28px; }
.legend b { font-weight: 600; } .legend span { color: var(--muted); font-size: 12px; }
.legend .empty { color: var(--muted); font-size: 12px; }
.written {
  white-space: pre-wrap; font: 12px/1.5 ui-monospace, SFMono-Regular, Menlo, monospace; background: var(--panel-2);
  border: 1px solid var(--line); border-radius: 8px; padding: 10px; max-height: 320px; overflow: auto;
}

.toast {
  position: fixed; left: 50%; bottom: 40px; transform: translate(-50%, 20px); opacity: 0; pointer-events: none; z-index: 50;
  background: var(--ink); color: var(--bg); padding: 9px 16px; border-radius: 8px; transition: .2s; box-shadow: var(--shadow); max-width: calc(100vw - 32px);
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }

dialog { border: 1px solid var(--line); border-radius: 14px; padding: 0; background: var(--panel); color: var(--ink); box-shadow: var(--shadow); width: min(560px, calc(100vw - 32px)); }
dialog::backdrop { background: rgb(20 15 10 / .45); }
.dialog { padding: 20px 22px; display: grid; gap: 12px; }
.dialog h2 { margin: 0; font-size: 19px; }
.dialog label { display: grid; gap: 4px; font-size: 13px; color: var(--muted); }
.dialog input[type=number], .dialog input:not([type]) { padding: 7px 9px; border: 1px solid var(--line); border-radius: 8px; background: var(--panel-2); }
.modes { border: 0; padding: 0; margin: 0; display: grid; gap: 6px; }
.modes label { display: flex; gap: 10px; align-items: flex-start; border: 1px solid var(--line); border-radius: 10px; padding: 9px 11px; cursor: pointer; color: var(--ink); }
.modes label:has(input:checked) { border-color: var(--accent); background: var(--accent-soft); }
.modes span { display: grid; } .modes small { color: var(--muted); }
.grid2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(130px, 1fr)); gap: 10px; }
.grid2[hidden] { display: none; }
.dialog label.check-row { display: flex; align-items: center; gap: 8px; color: var(--ink); }
.help p { margin: 0; color: var(--ink); }
.cols2 { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.keys { margin: 0; padding: 0; list-style: none; display: grid; gap: 5px; font-size: 13px; }

.backdrop { display: none; }

/* narrow screens: side panels become drawers */
@media (max-width: 980px) {
  .workspace { grid-template-columns: 1fr; }
  .only-mobile { display: inline-grid; }
  .panel.left, .panel.right {
    position: fixed; top: 0; bottom: 0; z-index: 40; width: min(320px, 86vw); box-shadow: var(--shadow);
    transition: transform .22s ease;
  }
  .panel.left { left: 0; transform: translateX(-102%); }
  .panel.right { right: 0; transform: translateX(102%); }
  .panel.open { transform: none; }
  .backdrop.show { display: block; position: fixed; inset: 0; z-index: 35; background: rgb(20 15 10 / .35); }
  .doc-name { display: none; }
  .brand span { display: none; }
}
@media (max-width: 640px) {
  .topbar { padding: 6px 8px; gap: 6px; }
  .menu .sep, .menu [data-act=help] { display: none; }
  .menu [data-act=zoomin], .menu [data-act=zoomout], .brand { display: none; }
  .donate { padding: 6px 10px; } .donate .label { display: none; }
  .toolbar { padding: 4px 8px; gap: 6px; overflow-x: auto; flex-wrap: nowrap; }
  .tool-group { flex-wrap: nowrap; }
  #tools button { width: 44px; }
  .current { min-width: 0; } .current div { display: none; }
  .cols2 { grid-template-columns: 1fr; }
}