:root {
  --bg-app: #0a141f;
  --bg-panel: #0c1826;
  --bg-panel-alt: #0f1e30;
  --bg-topbar: #0d1c2e;
  --border: #1c3145;
  --accent: #29a3d6;
  --accent-bright: #4fc3f7;
  --text: #d7e2ec;
  --text-dim: #7690a5;
  --danger: #b8394a;
  --danger-hover: #d1465a;
  --ok: #2fae6b;
  --viewport-bg: #05090e;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  background: var(--bg-app);
  color: var(--text);
  font-family: "Segoe UI", Arial, sans-serif;
  font-size: 13px;
  overflow: hidden;
}

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

/* ---------- TOP BAR ---------- */
.topbar {
  display: flex;
  align-items: center;
  height: 42px;
  background: var(--bg-topbar);
  border-bottom: 1px solid var(--border);
  padding: 0 10px;
  gap: 18px;
  flex-shrink: 0;
}

.brand {
  display: flex;
  align-items: baseline;
  gap: 6px;
  padding-right: 14px;
  border-right: 1px solid var(--border);
  white-space: nowrap;
}
.brand-name { color: var(--accent-bright); font-weight: 700; font-size: 15px; letter-spacing: .3px; }
.brand-sub { color: var(--text-dim); font-size: 12px; }

.menu { display: flex; gap: 4px; flex: 1; }
.menu-item {
  background: transparent;
  border: none;
  color: var(--text);
  padding: 8px 12px;
  font-size: 13px;
  cursor: pointer;
  border-radius: 3px;
}
.menu-item:hover { background: var(--bg-panel-alt); color: var(--accent-bright); }

.topbar-right { display: flex; align-items: center; gap: 8px; }
.estilo-label { color: var(--text-dim); font-size: 11px; letter-spacing: .5px; margin-right: 2px; }
.estilo-select {
  background: var(--bg-panel-alt);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 3px;
  padding: 5px 8px;
  font-size: 12px;
}

.btn {
  border: none;
  border-radius: 3px;
  padding: 7px 12px;
  font-size: 12px;
  cursor: pointer;
  color: white;
  font-weight: 600;
}
.btn-danger { background: var(--danger); }
.btn-danger:hover { background: var(--danger-hover); }

.btn-demo {
  display: block;
  width: calc(100% - 28px);
  margin: 0 14px 4px;
  background: var(--bg-panel-alt);
  border: 1px solid var(--accent);
  color: var(--accent-bright);
}
.btn-demo:hover { background: var(--accent); color: #06222e; }

/* ---------- BODY LAYOUT ---------- */
.body-wrap { flex: 1; display: flex; min-height: 0; }

/* ---------- SIDEBAR ---------- */
.sidebar {
  width: 300px;
  flex-shrink: 0;
  background: var(--bg-panel);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
}

.sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 14px 6px;
}
.sidebar-header h2 {
  font-size: 13px;
  color: var(--accent-bright);
  margin: 0;
  letter-spacing: .5px;
}
.icon-btn {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-dim);
  border-radius: 3px;
  width: 24px; height: 24px;
  cursor: pointer;
}
.icon-btn:hover { color: var(--accent-bright); border-color: var(--accent); }

.drop-zone {
  margin: 10px 14px;
  border: 1.5px dashed var(--border);
  border-radius: 6px;
  padding: 14px 10px;
  cursor: pointer;
  transition: border-color .15s, background .15s;
}
.drop-zone:hover, .drop-zone.dragover {
  border-color: var(--accent);
  background: rgba(41, 163, 214, 0.08);
}
.drop-zone-inner { display: flex; align-items: center; gap: 10px; }
.drop-icon {
  font-size: 20px;
  color: var(--accent);
  width: 30px; height: 30px;
  display: flex; align-items: center; justify-content: center;
  border: 1px solid var(--border);
  border-radius: 50%;
  flex-shrink: 0;
}
.drop-text { font-size: 11.5px; color: var(--text-dim); line-height: 1.4; }
.drop-text span { color: #4a6478; }

.panel-section { padding: 8px 14px 4px; border-top: 1px solid var(--border); margin-top: 6px; }
.panel-title {
  font-size: 11px;
  color: var(--accent);
  font-weight: 700;
  letter-spacing: .6px;
  margin-bottom: 6px;
}
.panel-title-row { display: flex; align-items: center; justify-content: space-between; }
.mini-btn {
  background: transparent;
  border: 1px solid var(--danger);
  color: var(--danger);
  font-size: 10px;
  border-radius: 3px;
  padding: 2px 6px;
  cursor: pointer;
}
.mini-btn:hover { background: var(--danger); color: white; }

.object-list { padding-bottom: 6px; }
.empty-hint { color: var(--text-dim); font-size: 11.5px; font-style: italic; padding: 4px 0 10px; }

.object-row {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 5px 4px;
  border-radius: 3px;
  font-size: 12px;
}
.object-row:hover { background: var(--bg-panel-alt); }
.object-row .name { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.object-row .tag {
  font-size: 9.5px;
  background: var(--bg-panel-alt);
  border: 1px solid var(--border);
  color: var(--accent-bright);
  padding: 1px 6px;
  border-radius: 3px;
  text-transform: uppercase;
}
.object-row .tag.vector { color: #d6a94f; }
.object-row .remove {
  color: var(--text-dim);
  cursor: pointer;
  padding: 0 3px;
  font-size: 13px;
}
.object-row .remove:hover { color: var(--danger-hover); }

.project-info { font-size: 11.5px; color: var(--text-dim); line-height: 1.7; }
.project-info b { color: var(--text); }

/* ---------- VIEWPORT ---------- */
.viewport {
  flex: 1;
  position: relative;
  background: var(--viewport-bg);
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.view-tabs {
  display: flex;
  gap: 2px;
  padding: 8px 8px 0;
  flex-shrink: 0;
  z-index: 5;
}
.view-tab {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-bottom: none;
  color: var(--text-dim);
  padding: 7px 18px;
  font-size: 12px;
  cursor: pointer;
  border-radius: 4px 4px 0 0;
}
.view-tab.active { color: var(--accent-bright); background: var(--viewport-bg); }

.view-pane {
  flex: 1;
  position: relative;
  display: none;
  min-height: 0;
}
.view-pane.active { display: block; }

#canvas2d { width: 100%; height: 100%; display: block; cursor: crosshair; }
#canvas3d-container { width: 100%; height: 100%; }

.legend {
  position: absolute;
  bottom: 14px;
  left: 14px;
  background: rgba(10, 20, 31, 0.85);
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 8px 10px;
  font-size: 10.5px;
  color: var(--text-dim);
  pointer-events: none;
}
.legend .grad { width: 140px; height: 10px; border-radius: 2px; margin: 4px 0; }
.legend-row { display: flex; justify-content: space-between; }

.empty-state {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  pointer-events: none;
}
.empty-state-title { color: var(--accent); font-size: 22px; font-weight: 700; letter-spacing: .5px; }
.empty-state-sub { color: var(--text-dim); font-size: 12.5px; }
.empty-state.hidden { display: none; }

.loading-overlay {
  position: absolute;
  inset: 0;
  background: rgba(5, 9, 14, 0.75);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  z-index: 20;
}
.loading-overlay.hidden { display: none; }
.spinner {
  width: 34px; height: 34px;
  border: 3px solid var(--border);
  border-top-color: var(--accent-bright);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ---------- STATUS BAR ---------- */
.statusbar {
  height: 34px;
  background: var(--bg-topbar);
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding: 0 12px;
  gap: 20px;
  font-size: 11px;
  color: var(--text-dim);
  flex-shrink: 0;
}
.status-left { white-space: nowrap; }
.status-coords { white-space: nowrap; color: var(--text); font-variant-numeric: tabular-nums; }
.status-controls { display: flex; align-items: center; gap: 6px; flex: 1; justify-content: center; flex-wrap: wrap; }
.status-controls label { color: var(--text-dim); font-size: 10.5px; }
.mini-input {
  width: 52px;
  background: var(--bg-panel-alt);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 3px;
  padding: 3px 5px;
  font-size: 11px;
  margin-right: 10px;
}
.checkbox-label { display: flex; align-items: center; gap: 4px; margin-right: 10px; }
.status-right {
  background: var(--accent);
  color: #06222e;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 3px;
  font-size: 10.5px;
}