:root {
  --bg-deep: #12161d;
  --bg-panel: #191f28;
  --bg-raised: #212836;
  --bg-input: #1b212b;
  --grid-line: rgba(255, 255, 255, 0.055);
  --border: #2a3140;
  --border-light: #384154;
  --text-primary: #eef2f6;
  --text-muted: #8b96a5;
  --text-dim: #5c6577;
  --accent: #ffb454;
  --accent-dim: #7a5a2c;
  --teal: #35c9c1;
  --danger: #ff5468;

  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--bg-deep);
  color: var(--text-primary);
  font-family: var(--font-body);
  -webkit-font-smoothing: antialiased;
}

body {
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
}

button, input, textarea { font-family: inherit; color: inherit; }

/* ---------- Topbar ---------- */
.topbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 16px;
  padding: 10px 16px;
  min-height: 56px;
  flex: none;
  background: var(--bg-panel);
  border-bottom: 1px solid var(--border);
}

.brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: 0.04em;
  font-size: 14px;
  color: var(--text-primary);
  flex: none;
}
.brand-mark { color: var(--accent); font-size: 16px; }

.topbar-nav {
  display: flex;
  gap: 4px;
  margin-left: 4px;
}
.topbar-nav a {
  font-size: 13px;
  color: var(--text-muted);
  text-decoration: none;
  padding: 6px 10px;
  border-radius: 5px;
}
.topbar-nav a:hover, .topbar-nav a.active { color: var(--text-primary); background: var(--bg-raised); }

.who { font-size: 12px; color: var(--text-dim); font-family: var(--font-mono); }

.title-input {
  background: transparent;
  border: none;
  border-bottom: 1px solid transparent;
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 500;
  color: var(--text-primary);
  padding: 6px 4px;
  flex: 1 1 140px;
  min-width: 90px;
  max-width: 320px;
  transition: border-color 0.15s;
}
.title-input:focus { outline: none; border-bottom-color: var(--accent); }
.title-input::placeholder { color: var(--text-dim); }

.topbar-right {
  margin-left: auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-end;
  gap: 8px 12px;
}

.status {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-dim);
}
.status.dirty { color: var(--accent); }
.status.saved { color: var(--teal); }

/* ---------- Buttons ---------- */
.btn {
  font-size: 13px;
  font-weight: 500;
  border-radius: 6px;
  padding: 8px 14px;
  border: 1px solid var(--border-light);
  background: var(--bg-raised);
  cursor: pointer;
  transition: background 0.12s, border-color 0.12s, color 0.12s;
}
.btn:hover { border-color: var(--accent); }
.btn:focus-visible { outline: 2px solid var(--teal); outline-offset: 1px; }

.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #1a1305;
  font-weight: 600;
}
.btn-primary:hover { background: #ffc172; }

.btn-ghost {
  background: transparent;
  color: var(--text-muted);
}
.btn-ghost:hover { color: var(--text-primary); }

.btn-small { padding: 5px 10px; font-size: 12px; }

.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  border-color: var(--border-light);
  color: var(--text-dim);
}
.btn:disabled:hover { border-color: var(--border-light); }

.file-btn { display: inline-block; }

/* ---------- Workspace layout ---------- */
.workspace {
  flex: 1;
  display: grid;
  grid-template-columns: 220px 1fr 280px;
  min-height: 0;
}

.panel {
  background: var(--bg-panel);
  display: flex;
  flex-direction: column;
  min-height: 0;
}
.panel-left { border-right: 1px solid var(--border); }
.panel-right { border-left: 1px solid var(--border); }

.panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px 10px;
  flex: none;
}
.panel-head-secondary { border-top: 1px solid var(--border); margin-top: 4px; }
.panel-head h2 {
  font-family: var(--font-display);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin: 0;
}

.count-badge {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--bg-deep);
  background: var(--accent);
  border-radius: 10px;
  padding: 1px 8px;
}

/* ---------- Mission list ---------- */
.mission-list {
  overflow-y: auto;
  padding: 0 10px 10px;
  flex: 1;
}

.mission-item {
  padding: 10px 10px;
  border-radius: 6px;
  cursor: pointer;
  border: 1px solid transparent;
  margin-bottom: 4px;
}
.mission-item:hover { background: var(--bg-raised); }
.mission-item.active { background: var(--bg-raised); border-color: var(--accent); }

.mission-item-title {
  font-size: 13px;
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.mission-item-meta {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-dim);
  margin-top: 3px;
  display: flex;
  justify-content: space-between;
}
.mission-item-delete {
  background: none;
  border: none;
  color: var(--text-dim);
  cursor: pointer;
  font-size: 11px;
}
.mission-item-delete:hover { color: var(--danger); }

.empty-note {
  color: var(--text-dim);
  font-size: 12px;
  padding: 8px 6px;
  line-height: 1.5;
}

.mission-settings {
  padding: 0 16px 16px;
}
.settings-check {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 12.5px;
  color: var(--text-primary);
  cursor: pointer;
  line-height: 1.4;
}
.settings-check input { accent-color: var(--accent); margin-top: 2px; }

/* ---------- Canvas area ---------- */
.canvas-area {
  display: flex;
  flex-direction: column;
  min-width: 0;
  min-height: 0;
  background:
    linear-gradient(var(--grid-line) 1px, transparent 1px) 0 0/24px 24px,
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px) 0 0/24px 24px,
    var(--bg-deep);
}

.toolbar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 10px 16px;
  flex: none;
  border-bottom: 1px solid var(--border);
  background: rgba(25, 31, 40, 0.6);
}

.toolbar-sep {
  width: 1px;
  height: 22px;
  background: var(--border-light);
  margin: 0 6px;
}

.tool-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-muted);
  border-radius: 6px;
  padding: 7px 12px;
  font-size: 12.5px;
  cursor: pointer;
}
.tool-btn:hover { color: var(--text-primary); border-color: var(--border-light); }
.tool-btn.active {
  color: var(--accent);
  border-color: var(--accent-dim);
  background: rgba(255, 180, 84, 0.08);
}
.tool-icon { font-size: 15px; line-height: 1; }

.canvas-wrap {
  position: relative;
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 0;
  overflow: hidden;
}

#stage {
  max-width: 100%;
  max-height: 100%;
  cursor: crosshair;
  box-shadow: 0 0 0 1px var(--border), 0 20px 60px rgba(0,0,0,0.4);
}

.coord-readout {
  position: absolute;
  left: 14px;
  bottom: 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--teal);
  background: rgba(18, 22, 29, 0.8);
  border: 1px solid var(--border);
  padding: 4px 10px;
  border-radius: 4px;
  pointer-events: none;
  letter-spacing: 0.02em;
}

.canvas-hint {
  position: absolute;
  color: var(--text-dim);
  font-size: 13px;
  pointer-events: none;
}

/* ---------- Challenge list ---------- */
.challenge-list {
  overflow-y: auto;
  max-height: 38vh;
  padding: 0 10px;
}

.challenge-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 8px;
  border-radius: 6px;
  cursor: pointer;
  border: 1px solid transparent;
  margin-bottom: 4px;
}
.challenge-item:hover { background: var(--bg-raised); }
.challenge-item.selected { background: var(--bg-raised); border-color: var(--accent); }

.challenge-order {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-dim);
  width: 16px;
  flex: none;
}
.challenge-icon { font-size: 14px; flex: none; width: 18px; text-align: center; }
.challenge-icon.hold { color: var(--accent); }
.challenge-icon.trace { color: var(--teal); }
.challenge-icon.move { color: #b48bff; }

.challenge-label {
  flex: 1;
  min-width: 0;
  font-size: 12.5px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.challenge-actions {
  display: flex;
  gap: 2px;
  flex: none;
}
.challenge-actions button {
  background: none;
  border: none;
  color: var(--text-dim);
  cursor: pointer;
  font-size: 12px;
  padding: 2px 4px;
}
.challenge-actions button:hover { color: var(--text-primary); }
.challenge-actions button.delete:hover { color: var(--danger); }

/* ---------- Properties panel ---------- */
.properties-panel {
  padding: 6px 16px 16px;
  overflow-y: auto;
  flex: 1;
}

.field {
  margin-bottom: 14px;
}
.field label {
  display: block;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-dim);
  margin-bottom: 6px;
}
.field input[type="text"],
.field input[type="number"],
.field textarea {
  width: 100%;
  background: var(--bg-input);
  border: 1px solid var(--border-light);
  border-radius: 5px;
  padding: 7px 9px;
  font-size: 13px;
  font-family: var(--font-mono);
}
.field textarea {
  font-family: var(--font-body);
  resize: vertical;
  min-height: 56px;
}
.field input:focus, .field textarea:focus {
  outline: none;
  border-color: var(--accent);
}
.field-row { display: flex; gap: 10px; }
.field-row .field { flex: 1; }

.field-hint {
  font-size: 11px;
  color: var(--text-dim);
  margin-top: 4px;
  line-height: 1.4;
}

.type-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 3px 8px;
  border-radius: 4px;
  margin-bottom: 12px;
}
.type-tag.hold { background: rgba(255,180,84,0.12); color: var(--accent); }
.type-tag.trace { background: rgba(53,201,193,0.12); color: var(--teal); }
.type-tag.move { background: rgba(180,139,255,0.12); color: #b48bff; }

/* scrollbars */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-light); border-radius: 4px; }