:root {
  --bg: #0e1116;
  --panel: #141a21;
  --panel2: #1b222c;
  --panel3: #222b36;
  --border: #242e3a;
  --text: #e8edf3;
  --muted: #8a97a5;
  --accent: #00b3a4;
  --accent-ink: #05231f;
  --danger: #b33a3a;
}

* { box-sizing: border-box; }

html, body { height: 100%; }

body {
  margin: 0;
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  display: flex;
  flex-direction: column;
}

button { font-family: inherit; }

.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  padding: 10px 16px;
  background: linear-gradient(180deg, #171e27, #12161d);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 20;
}

.brand { display: flex; align-items: center; gap: 12px; }

.brand .logo { width: 40px; height: 40px; flex: none; }

.brand h1 { font-size: 17px; margin: 0; letter-spacing: 0.3px; }

.brand p { margin: 0; font-size: 11.5px; color: var(--muted); }

.toolbar { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }

.toolbar label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--muted);
  white-space: nowrap;
}

.toolbar input[type="text"],
.toolbar select,
.inspector-body select {
  background: var(--panel2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 6px 8px;
  font-size: 13px;
  max-width: 220px;
}

.toolbar input[type="text"] { width: 150px; }

.toolbar button,
.modal button,
.inspector button {
  background: var(--panel2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 7px 12px;
  font-size: 12.5px;
  cursor: pointer;
  transition: background 0.12s ease, border-color 0.12s ease;
}

.toolbar button:hover,
.modal button:hover,
.inspector button:hover { background: var(--panel3); }

.toolbar button.primary,
.modal button.primary {
  background: var(--accent);
  color: var(--accent-ink);
  border-color: var(--accent);
  font-weight: 600;
}

.toolbar button.toggle.active {
  background: var(--accent);
  color: var(--accent-ink);
  border-color: var(--accent);
  font-weight: 600;
}

.seg {
  display: inline-flex;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}

.seg button {
  border: none;
  border-radius: 0;
  padding: 7px 10px;
  background: var(--panel2);
}

.seg button.active {
  background: var(--accent);
  color: var(--accent-ink);
  font-weight: 600;
}

.app-main {
  flex: 1;
  display: grid;
  grid-template-columns: 250px 1fr 260px;
  min-height: 0;
}

.palette,
.inspector {
  background: var(--panel);
  overflow-y: auto;
  padding: 14px;
}

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

.palette h2,
.inspector h2 {
  font-size: 14px;
  margin: 0 0 4px;
  letter-spacing: 0.3px;
}

.palette-hint { font-size: 11.5px; color: var(--muted); margin: 0 0 16px; }

.category { margin-bottom: 18px; }

.category h3 {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin: 0 0 8px;
  color: var(--muted);
}

.category h3 .glyph { width: 16px; height: 16px; flex: none; }

.chips { display: flex; flex-direction: column; gap: 6px; }

.chip {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  text-align: left;
  background: var(--panel2);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 8px;
  padding: 8px 10px;
  font-size: 12.5px;
  cursor: grab;
}

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

.chip-name { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.chip-unit { color: var(--muted); font-size: 11px; flex: none; }

.chip-count {
  background: var(--accent);
  color: var(--accent-ink);
  font-weight: 700;
  font-size: 11px;
  border-radius: 10px;
  padding: 1px 7px;
  display: none;
  flex: none;
}

.chip-count.show { display: inline-block; }

.chip.used { background: var(--panel3); border-color: #35414f; }

.chip.used::before {
  content: "✓";
  color: var(--accent);
  font-weight: 700;
  font-size: 12px;
  flex: none;
}

.chip.used .chip-count { background: var(--panel3); color: var(--accent); }

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

.canvas-wrap {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  overflow: auto;
  padding: 24px 20px 40px;
  background:
    radial-gradient(1200px 600px at 50% -10%, rgba(0, 179, 164, 0.08), transparent 60%),
    var(--bg);
}

.canvas-inner { display: flex; flex-direction: column; align-items: center; }

.screens-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  width: 100%;
  max-width: 560px;
  margin-bottom: 16px;
  padding: 10px 12px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
}

.screens-bar label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 11.5px;
  color: var(--muted);
  white-space: nowrap;
}

.screens-bar input[type="text"],
.screens-bar select {
  background: var(--panel2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 5px 8px;
  font-size: 12.5px;
}

.screens-bar input[type="text"] { width: 130px; }

.screen-tabs { display: flex; gap: 6px; overflow-x: auto; max-width: 100%; }

.screen-tab {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 2px;
  background: var(--panel2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 6px 10px;
  cursor: pointer;
  text-align: left;
  transition: border-color 0.12s ease;
}

.screen-tab:hover { border-color: #3a4757; }

.screen-tab.active { border-color: var(--accent); background: rgba(0, 179, 164, 0.08); }

.screen-tab .st-name { font-size: 12px; font-weight: 600; white-space: nowrap; }

.screen-tab .st-meta { font-size: 10px; color: var(--muted); white-space: nowrap; }

.screen-tab.active .st-meta { color: rgba(255, 255, 255, 0.55); }

.add-screen {
  background: var(--panel2);
  color: var(--text);
  border: 1px dashed var(--border);
  border-radius: 8px;
  padding: 8px 12px;
  font-size: 12px;
  cursor: pointer;
  flex: none;
}

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

.screen-sep { width: 1px; align-self: stretch; background: var(--border); }

.screens-bar button:disabled { opacity: 0.4; cursor: not-allowed; }

.device-svg {
  max-width: 100%;
  height: auto;
  display: block;
  border-radius: 30px;
  box-shadow: 0 14px 44px rgba(0, 0, 0, 0.65), 0 2px 8px rgba(0, 0, 0, 0.5);
  user-select: none;
  -webkit-user-select: none;
  touch-action: none;
}

.device-svg.static { box-shadow: 0 10px 30px rgba(0, 0, 0, 0.35); }

.device-svg .screen { cursor: crosshair; }

.device-svg .slot { pointer-events: none; }

.device-svg .slot-hit { pointer-events: all; cursor: pointer; }

.device-svg .slot.empty .slot-empty-bg { transition: fill 0.12s ease, stroke 0.12s ease; }

.device-svg .slot.empty:hover .slot-empty-bg { fill: rgba(0, 179, 164, 0.09); stroke: rgba(0, 179, 164, 0.6); }

.device-svg .slot.empty:hover .slot-empty-plus { fill: var(--accent); }

.device-svg.drag-over { outline: 3px dashed var(--accent); outline-offset: 6px; }

.hint {
  text-align: center;
  color: var(--muted);
  font-size: 12.5px;
  max-width: 440px;
  margin: 18px auto 0;
  line-height: 1.5;
}

.inspector-empty {
  color: var(--muted);
  font-size: 13px;
  border: 1px dashed var(--border);
  border-radius: 8px;
  padding: 18px;
  text-align: center;
}

.inspector-body { display: flex; flex-direction: column; gap: 14px; }

.inspector-title { margin: 0; font-size: 14px; font-weight: 600; color: var(--text); }

.inspector-sub { margin: 2px 0 0; font-size: 11px; color: var(--muted); }

.inspector-desc {
  margin: 8px 0 0;
  font-size: 12px;
  line-height: 1.5;
  color: var(--muted);
  border-left: 2px solid var(--accent);
  padding-left: 10px;
}

.inspector-body label {
  font-size: 12px;
  color: var(--muted);
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.swatches { display: flex; gap: 8px; flex-wrap: wrap; }

.swatch {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, 0.25);
  cursor: pointer;
  padding: 0;
}

.swatch.active { outline: 3px solid var(--accent); outline-offset: 1px; }

.inspector-actions { display: flex; gap: 8px; }

.inspector-actions button { flex: 1; }

button.danger { background: #2a1517; border-color: #4a2325; color: #ff8a8a; }

button.danger:hover { background: #3a1c1e; }

.inspector-info {
  color: var(--muted);
  font-size: 11px;
  font-family: ui-monospace, Menlo, monospace;
  margin: 0;
}

.inspector-help {
  margin-top: 24px;
  border-top: 1px solid var(--border);
  padding-top: 12px;
  font-size: 12px;
  color: var(--muted);
}

.inspector-help h3 { font-size: 11px; text-transform: uppercase; letter-spacing: 1px; margin: 0 0 8px; color: var(--muted); }

.inspector-help ul { margin: 0; padding-left: 16px; line-height: 1.7; }

.app-footer {
  display: flex;
  gap: 16px;
  align-items: center;
  padding: 6px 16px;
  border-top: 1px solid var(--border);
  font-size: 12px;
  color: var(--muted);
  background: var(--panel);
}

.app-footer .spacer { flex: 1; }

.app-footer b { color: var(--text); }

.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 50;
}

.modal-backdrop[hidden] { display: none; }

.modal {
  background: var(--panel2);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px;
  width: min(560px, 92vw);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

.modal h2 { margin: 0 0 6px; font-size: 16px; }

.modal p { margin: 0 0 12px; font-size: 12.5px; color: var(--muted); }

.modal textarea {
  width: 100%;
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px;
  font-family: ui-monospace, Menlo, monospace;
  font-size: 12px;
  resize: vertical;
}

.modal-actions {
  display: flex;
  gap: 8px;
  align-items: center;
  justify-content: flex-end;
  margin-top: 12px;
}

.modal-actions .btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--panel2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 7px 12px;
  font-size: 12.5px;
  cursor: pointer;
}

.modal-actions .btn:hover { background: var(--panel3); }

.modal-actions input[type="file"] { display: none; }

.modal.picker { width: min(520px, 94vw); }

.picker-body {
  max-height: 46vh;
  overflow-y: auto;
  padding-right: 6px;
  margin-top: 4px;
}

.picker-body .category { margin-bottom: 12px; }

.toast {
  position: fixed;
  bottom: 54px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--panel3);
  color: var(--text);
  border: 1px solid var(--accent);
  border-radius: 8px;
  padding: 8px 14px;
  font-size: 12.5px;
  z-index: 60;
  opacity: 0;
  transition: opacity 0.15s ease;
  pointer-events: none;
  white-space: nowrap;
}

.toast.show { opacity: 1; }

.tooltip {
  position: fixed;
  z-index: 70;
  max-width: 320px;
  background: #0d1219;
  color: var(--text);
  border: 1px solid var(--accent);
  border-radius: 8px;
  padding: 8px 10px;
  font-size: 12px;
  line-height: 1.45;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.12s ease;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
}

.tooltip.show { opacity: 1; }

@media (max-width: 1100px) {
  .app-main { grid-template-columns: 220px 1fr 220px; }
}

@media (max-width: 900px) {
  .app-main { grid-template-columns: 1fr; grid-template-rows: auto 1fr; }
  .palette { border-right: none; border-bottom: 1px solid var(--border); }
  .inspector { border-left: none; border-top: 1px solid var(--border); }
}