*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; height: 100%; overflow: hidden; }

.app {
  --bg: var(--d-bg, #ffffff);
  --ink: var(--d-ink, #1f2328);
  --muted: var(--d-muted, #59636e);
  --border: var(--d-border, #d1d9e0);
  --accent: var(--d-accent, #0969da);
  --on-accent: var(--d-on-accent, #ffffff);
  --on-danger: var(--d-on-danger, #ffffff);
  --hover: var(--d-hover, rgba(128, 128, 128, 0.12));
  --active: var(--d-active, rgba(128, 128, 128, 0.2));
  --accent-soft: var(--d-accent-soft, rgba(9, 105, 218, 0.12));
  --shadow: var(--d-shadow, 0 1px 2px rgba(0, 0, 0, 0.06));
  --pop-shadow: var(--d-pop-shadow, 0 8px 28px rgba(0, 0, 0, 0.16));
  --font: var(--d-font, "Segoe UI", system-ui, -apple-system, sans-serif);
  --mono: var(--d-mono, ui-monospace, "Cascadia Code", Consolas, monospace);

  height: 100%;
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
  background: var(--bg);
  color: var(--ink);
  font: 13px/1.4 var(--font);
  -webkit-font-smoothing: antialiased;
  transition: opacity 120ms ease-out;
}
/* Hidden until the host's theme arrives, so a dark app doesn't flash white on open. */
.app.booting { opacity: 0; }

button { font: inherit; color: inherit; }
button:focus-visible, input:focus-visible, textarea:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }
svg.icon { width: 16px; height: 16px; display: block; fill: none; stroke: currentColor; stroke-width: 1.5; stroke-linecap: round; stroke-linejoin: round; }
kbd {
  font: 500 11px/1 var(--mono);
  border: 1px solid var(--border);
  border-bottom-width: 2px;
  border-radius: 4px;
  padding: 1px 4px;
  color: var(--ink);
  background: var(--bg);
}

/* ---------- top bar ---------- */
.bar {
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 0 8px;
  border-bottom: 1px solid var(--border);
  min-width: 0;
}
.bar-group { display: flex; align-items: center; gap: 4px; min-width: 0; }
.bar-doc { flex: 1 1 auto; }
.bar-actions { flex: none; }
.doc-button {
  display: flex; align-items: center; gap: 6px;
  max-width: 240px; min-width: 0;
  height: 28px; padding: 0 8px;
  border: 0; border-radius: 6px; background: transparent;
  font-weight: 600; cursor: pointer;
}
.doc-button:hover, .doc-button[aria-expanded="true"] { background: var(--hover); }
.doc-name { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.chev {
  flex: none; width: 6px; height: 6px; margin-top: -3px;
  border-right: 1.5px solid currentColor; border-bottom: 1.5px solid currentColor;
  transform: rotate(45deg); opacity: 0.55;
}
.doc-rename {
  width: 220px; height: 28px; padding: 0 8px;
  font: 600 13px var(--font); color: var(--ink);
  background: var(--bg); border: 1px solid var(--accent); border-radius: 6px; outline: none;
}
/* A long status gives up its room before the drawing name does. */
.status { flex-shrink: 1000; color: var(--muted); font-size: 12px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.status.is-error { color: var(--d-danger, #cf222e); }
.sep { width: 1px; height: 18px; background: var(--border); margin: 0 4px; flex: none; }

.btn {
  height: 28px; padding: 0 10px;
  border: 1px solid var(--border); border-radius: 6px;
  background: var(--bg); font-weight: 500; font-size: 12.5px;
  white-space: nowrap; cursor: pointer;
}
.btn:hover, .btn[aria-expanded="true"] { background: var(--hover); }
.btn-primary { background: var(--accent); color: var(--on-accent); border-color: transparent; }
.btn-primary:hover, .btn-primary[aria-expanded="true"] { background: var(--accent); filter: brightness(1.08); }
.btn:disabled { opacity: 0.5; cursor: default; }
.btn-danger { background: var(--d-danger, #cf222e); color: var(--on-danger); border-color: transparent; }
.btn-danger:hover { background: var(--d-danger, #cf222e); filter: brightness(1.08); }

.icon-btn {
  width: 28px; height: 28px; padding: 0;
  display: grid; place-items: center;
  border: 0; border-radius: 6px; background: transparent;
  cursor: pointer; flex: none;
}
.icon-btn:hover:not(:disabled) { background: var(--hover); }
.icon-btn:disabled { opacity: 0.35; cursor: default; }
.icon-btn[aria-pressed="true"] { background: var(--accent-soft); color: var(--accent); }

/* ---------- stage ---------- */
.stage {
  position: relative;
  overflow: hidden;
  outline: none;
  touch-action: none;
  user-select: none;
  -webkit-user-select: none;
  background-color: var(--bg);
  background-image: radial-gradient(circle at 1px 1px, var(--d-dot, rgba(128, 128, 128, 0.35)) 1px, transparent 1.4px);
}
.svg { position: absolute; inset: 0; width: 100%; height: 100%; display: block; font-family: var(--font); outline: none; }
.svg:focus-visible:not(.pointer-used) { outline: 2px solid var(--accent); outline-offset: -2px; }
.sr-only {
  position: absolute; width: 1px; height: 1px; margin: -1px; padding: 0; border: 0;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap;
}
.layer { position: absolute; inset: 0; pointer-events: none; overflow: hidden; }
.label-editor {
  position: absolute;
  pointer-events: auto;
  margin: 0; padding: 0; border: 0; outline: none; resize: none; overflow: hidden;
  background: transparent;
  white-space: pre-wrap; overflow-wrap: anywhere;
  caret-color: var(--accent);
}
.label-editor.no-wrap { white-space: pre; overflow-wrap: normal; }

.floating {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.tools {
  position: absolute; left: 8px; top: 8px;
  display: flex; flex-direction: column; gap: 1px;
  padding: 3px;
  background: var(--bg); border: 1px solid var(--border); border-radius: 8px; box-shadow: var(--shadow);
  max-height: calc(100% - 56px); overflow-y: auto; scrollbar-width: none;
}
.tool { position: relative; width: 30px; height: 30px; }
.tool .key {
  position: absolute; right: 2px; bottom: 1px;
  font: 600 8px/1 var(--mono); color: var(--muted); opacity: 0.8;
  pointer-events: none;
}
.tool[aria-pressed="true"] .key { color: var(--accent); }
.tools .rule { height: 1px; margin: 3px 5px; background: var(--border); flex: none; }

.stylebar {
  position: absolute; top: 8px; left: 56px; right: 8px;
  display: flex; justify-content: center;
  pointer-events: none;
}
.stylebar[hidden] { display: none; }
.stylebar-inner {
  pointer-events: auto;
  display: flex; flex-wrap: wrap; align-items: center; justify-content: center; gap: 2px;
  padding: 3px; max-width: 100%;
  background: var(--bg); border: 1px solid var(--border); border-radius: 8px; box-shadow: var(--shadow);
}
.style-group { display: flex; align-items: center; gap: 1px; }
.style-group + .style-group { border-left: 1px solid var(--border); padding-left: 3px; margin-left: 1px; }
.swatch { width: 26px; height: 26px; }
.swatch .dot { width: 14px; height: 14px; border-radius: 50%; border: 1.5px solid; }
.swatch[aria-pressed="true"] { background: transparent; box-shadow: inset 0 0 0 1.5px var(--accent); color: inherit; }
.size-btn { width: 26px; height: 26px; font: 600 11px/1 var(--font); }

.zoom {
  position: absolute; right: 8px; bottom: 8px;
  display: flex; align-items: center; gap: 1px; padding: 2px;
  background: var(--bg); border: 1px solid var(--border); border-radius: 8px; box-shadow: var(--shadow);
}
.zoom-level {
  min-width: 48px; height: 28px; padding: 0 4px;
  border: 0; border-radius: 6px; background: transparent;
  font: 500 12px var(--font); font-variant-numeric: tabular-nums; cursor: pointer;
}
.zoom-level:hover { background: var(--hover); }
.help-button {
  position: absolute; left: 8px; bottom: 8px;
  background: var(--bg); border: 1px solid var(--border); border-radius: 8px; box-shadow: var(--shadow);
  width: 32px; height: 32px;
}

.empty {
  position: absolute; left: 50%; top: 50%; transform: translate(-50%, -50%);
  width: min(340px, calc(100% - 120px));
  text-align: center; color: var(--muted);
  pointer-events: none;
}
.empty[hidden] { display: none; }
.empty p { margin: 0 0 6px; }
.empty .empty-title { color: var(--ink); font-size: 15px; font-weight: 600; margin-bottom: 10px; }
.empty b { color: var(--accent); }

/* ---------- popovers ---------- */
.popover {
  position: fixed; z-index: 30;
  min-width: 200px; max-width: min(340px, calc(100vw - 16px));
  max-height: calc(100vh - 56px); overflow-y: auto;
  padding: 4px;
  background: var(--bg); color: var(--ink);
  border: 1px solid var(--border); border-radius: 8px; box-shadow: var(--pop-shadow);
}
.menu-label { padding: 6px 8px 4px; color: var(--muted); font-size: 11px; font-weight: 600; }
.menu-item {
  width: 100%; display: flex; align-items: center; gap: 8px;
  min-height: 30px; padding: 4px 8px;
  border: 0; border-radius: 5px; background: transparent;
  text-align: left; cursor: pointer;
}
.menu-item:hover, .menu-item:focus-visible { background: var(--hover); outline: none; }
.menu-item .grow { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.menu-item > .icon { color: var(--muted); }
.menu-item.danger > .icon { color: inherit; }
.menu-item .meta { color: var(--muted); font-size: 11.5px; white-space: nowrap; }
.menu-item.is-current { font-weight: 600; }
.menu-item.is-current::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--accent); flex: none; }
.menu-item.danger { color: var(--d-danger, #cf222e); }
.menu-item[aria-checked="true"] { font-weight: 600; }
.menu-item .tick { display: flex; width: 16px; flex: none; color: var(--accent); }
.menu-rule { height: 1px; margin: 4px 0; background: var(--border); }
.menu-note { padding: 6px 8px; color: var(--muted); font-size: 12px; }
.menu-actions { display: flex; justify-content: flex-end; gap: 6px; padding: 4px 4px 2px; }

.ask { width: 340px; padding: 10px; }
.ask-title { font-weight: 600; margin: 0 0 2px; }
.ask-sub { color: var(--muted); font-size: 12px; margin: 0 0 8px; }
.ask textarea {
  width: 100%; min-height: 76px; max-height: 220px; resize: vertical;
  padding: 7px 8px; border: 1px solid var(--border); border-radius: 6px;
  background: var(--bg); color: var(--ink); font: 13px/1.45 var(--font);
}
.ask textarea:focus { outline: none; border-color: var(--accent); }
.ask-foot { display: flex; align-items: center; justify-content: space-between; gap: 8px; margin-top: 8px; }
.ask-hint { color: var(--muted); font-size: 11.5px; }
.chips { display: flex; flex-wrap: wrap; gap: 4px; margin-top: 8px; }
.chip {
  height: 24px; padding: 0 8px; border: 1px solid var(--border); border-radius: 12px;
  background: transparent; font-size: 12px; color: var(--muted); cursor: pointer;
}
.chip:hover { color: var(--ink); background: var(--hover); }

.help { width: 320px; padding: 8px 10px 10px; }
.help h2 { font-size: 13px; margin: 2px 0 8px; }
.help dl { display: grid; grid-template-columns: auto 1fr; gap: 5px 12px; margin: 0; font-size: 12px; }
.help dt { white-space: nowrap; }
.help dd { margin: 0; color: var(--muted); }

/* ---------- toasts ---------- */
.toasts {
  position: fixed; left: 50%; bottom: 52px; transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center; gap: 6px;
  z-index: 40; pointer-events: none;
}
.toast {
  pointer-events: auto;
  display: flex; align-items: center; gap: 10px;
  max-width: min(420px, calc(100vw - 24px));
  padding: 7px 8px 7px 12px;
  background: var(--ink); color: var(--bg);
  border-radius: 8px; box-shadow: var(--pop-shadow);
  font-size: 12.5px;
  animation: toast-in 140ms ease-out;
}
.toast.is-error { background: var(--d-danger, #cf222e); color: var(--on-danger); }
.toast button {
  border: 0; background: transparent; color: inherit; font-weight: 600; text-decoration: underline;
  cursor: pointer; padding: 2px 4px;
}
@keyframes toast-in { from { opacity: 0; transform: translateY(4px); } }

@media (max-width: 520px) {
  .status { display: none; }
  .doc-button { max-width: 150px; }
}
@media (prefers-reduced-motion: reduce) {
  .toast { animation: none; }
}