:root {
  --bg: #161616;
  --panel: #1e1e1e;
  --ink: #e6e6e6;
  --ink-dim: #8a8a8a;
  --line: #3a3a3a;
  --accent: #5cc489;
  --font: "Courier New", Courier, monospace;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

a { color: var(--ink); text-decoration: none; }
a:hover { color: var(--accent); }

button, input {
  font: inherit;
  letter-spacing: inherit;
  text-transform: inherit;
  color: var(--ink);
  background: var(--bg);
  border: 1px solid var(--ink);
  border-radius: 3px;
  padding: 6px 10px;
}
button { cursor: pointer; }
button:hover:not(:disabled) { border-color: var(--accent); color: var(--accent); }
button:disabled { opacity: 0.35; cursor: default; }
input { text-align: center; }
input::placeholder { color: var(--ink-dim); }

/* Landing */
body.landing { display: flex; align-items: center; justify-content: center; }
.landing-content { width: min(560px, 92vw); text-align: center; }
.landing-content h1 { font-size: 1.6rem; letter-spacing: 0.2em; margin-bottom: 0.5rem; }
.subtitle { color: var(--ink-dim); font-size: 0.8rem; line-height: 1.6; margin-bottom: 2rem; }
.entry-link {
  display: inline-block;
  border: 1px solid var(--ink);
  border-radius: 3px;
  padding: 12px 24px;
  margin-bottom: 1.5rem;
}
.entry-link:hover { border-color: var(--accent); }
.join-row { display: flex; gap: 8px; justify-content: center; margin-bottom: 2rem; }
.join-row input { width: 7ch; }
.footnote { font-size: 0.7rem; color: var(--ink-dim); line-height: 1.8; }
.footnote a { text-decoration: underline; }

/* Canvas page */
body.canvas-page {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  touch-action: none;
  overscroll-behavior: none;
}
#toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  align-items: center;
  padding: 8px 12px;
  border-bottom: 1px solid var(--line);
  background: var(--panel);
  font-size: 0.75rem;
}
#toolbar .group { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; }
#toolbar .home { letter-spacing: 0.2em; margin-right: 8px; }
#toolbar .code { font-size: 1rem; letter-spacing: 0.3em; padding: 0 6px; border: 1px solid var(--line); border-radius: 3px; }
#toolbar .badge { color: var(--ink-dim); }
#toolbar .roster { display: inline-flex; gap: 8px; flex-wrap: wrap; }
#toolbar .peer { display: inline-flex; align-items: center; gap: 4px; color: var(--ink-dim); font-size: 0.65rem; }
#toolbar .peer.me { color: var(--ink); }
#toolbar .peer i { display: inline-block; width: 8px; height: 8px; border-radius: 50%; }
#sketch-holder canvas { cursor: crosshair; }
#toolbar button { font-size: 0.7rem; padding: 4px 8px; }
#toolbar .speed label { color: var(--ink-dim); }
#toolbar .speed input[type="range"] { width: 140px; accent-color: var(--accent); padding: 0; border: none; background: transparent; }
#toolbar .speed input[type="range"]:disabled { opacity: 0.35; }

#workspace { flex: 1; min-height: 0; display: flex; }
#sketch-holder { flex: 1; min-width: 0; min-height: 0; position: relative; overflow: hidden; }
#sketch-holder canvas { display: block; }

/* Sidebar: shape palette + document settings */
#sidebar {
  width: 190px;
  flex: 0 0 190px;
  border-right: 1px solid var(--line);
  background: var(--panel);
  overflow-y: auto;
  font-size: 0.7rem;
  user-select: none;
}
#sidebar.disabled { opacity: 0.5; }
.side-section { padding: 12px; border-bottom: 1px solid var(--line); }
.side-title { letter-spacing: 0.2em; margin-bottom: 4px; }
.side-hint { color: var(--ink-dim); font-size: 0.6rem; margin-bottom: 10px; }
.palette { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.palette-item {
  display: flex; flex-direction: column; align-items: center; gap: 4px;
  padding: 8px 4px; border: 1px solid var(--line); border-radius: 3px; cursor: grab;
  color: var(--ink-dim); touch-action: none;
}
.palette-item:hover { border-color: var(--accent); color: var(--accent); }
.palette-item svg { width: 36px; height: 36px; fill: none; stroke: currentColor; stroke-width: 2; }
.palette-item span { font-size: 0.55rem; }
.palette-ghost {
  position: fixed; z-index: 50; pointer-events: none; transform: translate(-50%, -50%);
  background: var(--panel); border-color: var(--accent); color: var(--accent); opacity: 0.9; width: 70px;
}
#settings label { display: flex; flex-direction: column; gap: 3px; margin: 8px 0; color: var(--ink-dim); }
#settings label.row { flex-direction: row; align-items: center; justify-content: space-between; }
#settings input[type="text"], #settings input[type="number"] { width: 100%; text-align: left; padding: 4px 6px; font-size: 0.7rem; }
#settings input[type="checkbox"] { accent-color: var(--accent); }
.side-error, .tip-error { color: #D96B6B; font-size: 0.6rem; min-height: 1em; margin-top: 4px; text-transform: uppercase; }

/* Tooltip dialog for entities and arrows */
.tooltip {
  position: absolute; z-index: 20; width: 240px; max-height: calc(100% - 16px); overflow-y: auto;
  background: var(--panel); border: 1px solid var(--ink); border-radius: 3px; padding: 10px;
  font-size: 0.65rem; box-shadow: 0 4px 24px rgba(0, 0, 0, 0.5);
}
.tooltip.hidden { display: none; }
.tip-head { display: flex; align-items: center; justify-content: space-between; gap: 8px; margin-bottom: 6px; }
.tip-title { letter-spacing: 0.15em; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.tip-delete { font-size: 0.55rem; padding: 2px 6px; border-color: #D96B6B; color: #D96B6B; }
.tip-delete:hover:not(:disabled) { border-color: #ff8f8f; color: #ff8f8f; }
.tip-group { border-top: 1px solid var(--line); padding-top: 6px; margin-top: 6px; }
.tip-group-name { color: var(--ink-dim); letter-spacing: 0.15em; font-size: 0.55rem; margin-bottom: 4px; }
.tip-field { display: flex; align-items: center; justify-content: space-between; gap: 8px; margin: 4px 0; color: var(--ink-dim); }
.tip-field > span { flex: 0 0 auto; }
.tip-field input, .tip-field select { width: 110px; padding: 3px 5px; font-size: 0.65rem; text-align: left; }
.tip-field input[type="color"] { width: 40px; height: 22px; padding: 0; }
.tip-field.tip-radio, .tip-field.tip-expression { flex-direction: column; align-items: stretch; }
.tip-field .radios { display: flex; flex-direction: column; gap: 4px; }
.tip-field .radios label { display: flex; align-items: center; gap: 6px; color: var(--ink); text-transform: uppercase; }
.tip-field .radios input { accent-color: var(--accent); width: auto; }
.tip-field.tip-expression input { width: 100%; margin: 3px 0; font-family: var(--font); text-transform: none; }
.tip-field.tip-expression select { width: 100%; }

#status-bar {
  padding: 6px 12px;
  border-top: 1px solid var(--line);
  background: var(--panel);
  color: var(--ink-dim);
  font-size: 0.7rem;
  min-height: 1.8em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Drag-and-drop of JSON files onto the page */
body.dropping #sketch-holder::after {
  content: "DROP A PALETTE OR CONFIG JSON";
  position: absolute;
  inset: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px dashed var(--accent);
  color: var(--accent);
  pointer-events: none;
}