:root {
  --bg: #0f172a;
  --bg-2: #1e293b;
  --bg-3: #273449;
  --panel: #1b2638;
  --border: #334155;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --accent: #3b82f6;
  --accent-2: #2563eb;
  --danger: #ef4444;
  --ok: #10b981;
  --shadow: 0 10px 30px rgba(0,0,0,.35);
  --radius: 10px;
}

* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body {
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
}

/* ---- Top bar ---- */
header.topbar {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 10px 18px;
  background: linear-gradient(180deg, #18243a, #131d2e);
  border-bottom: 1px solid var(--border);
  flex: 0 0 auto;
  z-index: 10;
}
header.topbar .brand {
  font-weight: 700;
  font-size: 18px;
  letter-spacing: .3px;
  display: flex; align-items: center; gap: 10px;
}
header.topbar .brand .logo {
  width: 26px; height: 26px; border-radius: 6px;
  background: linear-gradient(135deg, var(--accent), #22d3ee);
}
header.topbar nav { display: flex; gap: 6px; }
header.topbar nav a {
  color: var(--muted);
  text-decoration: none;
  padding: 7px 14px;
  border-radius: 8px;
  font-size: 14px;
}
header.topbar nav a:hover { background: var(--bg-3); color: var(--text); }
header.topbar nav a.active { background: var(--accent); color: white; }
header.topbar .spacer { flex: 1; }

/* ---- Main view ---- */
#view { flex: 1 1 auto; overflow: auto; position: relative; }
.page { padding: 24px 28px; max-width: 1200px; margin: 0 auto; }
.page h1 { font-size: 22px; margin: 0 0 4px; }
.page .sub { color: var(--muted); margin: 0 0 22px; }

/* ---- Buttons ---- */
.btn {
  border: 1px solid var(--border);
  background: var(--bg-3);
  color: var(--text);
  padding: 8px 14px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 14px;
  display: inline-flex; align-items: center; gap: 7px;
  transition: background .12s, border-color .12s;
}
.btn:hover { background: #324563; }
.btn.primary { background: var(--accent); border-color: var(--accent-2); color: white; }
.btn.primary:hover { background: var(--accent-2); }
.btn.danger { background: transparent; border-color: #7f1d1d; color: #fca5a5; }
.btn.danger:hover { background: #7f1d1d; color: white; }
.btn.ghost { background: transparent; }
.btn.sm { padding: 5px 10px; font-size: 13px; }
.btn:disabled { opacity: .5; cursor: not-allowed; }

/* ---- Cards / grid ---- */
.toolbar-row { display: flex; align-items: center; gap: 10px; margin-bottom: 18px; flex-wrap: wrap; }
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 16px; }
.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  box-shadow: var(--shadow);
}
.card h3 { margin: 0 0 6px; font-size: 16px; }
.card .meta { color: var(--muted); font-size: 13px; line-height: 1.5; }
.card .actions { display: flex; gap: 8px; margin-top: 14px; flex-wrap: wrap; }
.swatch { width: 14px; height: 14px; border-radius: 4px; display: inline-block; vertical-align: middle; border: 1px solid rgba(255,255,255,.2); }
.pill { font-size: 11px; padding: 2px 8px; border-radius: 999px; background: var(--bg-3); color: var(--muted); }

/* ---- Forms ---- */
.form-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.field { display: flex; flex-direction: column; gap: 5px; }
.field.full { grid-column: 1 / -1; }
.field label { font-size: 13px; color: var(--muted); }
.field input, .field select, .field textarea {
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 8px;
  padding: 9px 11px;
  font-size: 14px;
  font-family: inherit;
}
.field input:focus, .field select:focus, .field textarea:focus { outline: 2px solid var(--accent); border-color: var(--accent); }
.field .hint { font-size: 12px; color: var(--muted); }

/* ---- Modal ---- */
.modal-backdrop {
  position: fixed; inset: 0; background: rgba(2,6,23,.7);
  display: flex; align-items: center; justify-content: center; z-index: 100;
  backdrop-filter: blur(2px);
}
.modal {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 14px;
  width: min(680px, 94vw);
  max-height: 90vh; overflow: auto;
  box-shadow: var(--shadow);
}
.modal header { display:flex; align-items:center; justify-content: space-between; padding: 16px 20px; border-bottom: 1px solid var(--border); }
.modal header h2 { margin: 0; font-size: 18px; }
.modal .body { padding: 20px; }
.modal .footer { padding: 16px 20px; border-top: 1px solid var(--border); display: flex; justify-content: flex-end; gap: 10px; }

/* ---- Empty state ---- */
.empty { text-align: center; color: var(--muted); padding: 60px 20px; }
.empty .big { font-size: 46px; margin-bottom: 10px; }

/* ---- Editor / Viewer full-bleed layouts ---- */
.workspace { position: absolute; inset: 0; display: flex; flex-direction: column; background: #0b1220; }
.workspace .ws-top {
  display: flex; align-items: center; gap: 10px; padding: 8px 12px;
  background: #111c2e; border-bottom: 1px solid var(--border); flex: 0 0 auto; flex-wrap: wrap;
}
.workspace .ws-top .title { font-weight: 600; margin-right: 6px; }
.workspace .ws-top .spacer { flex: 1; }
.workspace .ws-body { flex: 1 1 auto; display: flex; min-height: 0; }

/* 2D editor */
.palette {
  width: 240px; flex: 0 0 auto; background: var(--panel); border-right: 1px solid var(--border);
  overflow-y: auto; padding: 12px;
}
.palette h4 { margin: 4px 0 10px; font-size: 13px; color: var(--muted); text-transform: uppercase; letter-spacing: .5px; }
.palette .pal-item {
  display: flex; align-items: center; gap: 10px; padding: 9px 10px; border-radius: 8px;
  border: 1px solid var(--border); margin-bottom: 8px; cursor: grab; background: var(--bg-2);
}
.palette .pal-item:hover { background: var(--bg-3); }
.palette .pal-item:active { cursor: grabbing; }
.palette .pal-item .pi-color { width: 22px; height: 22px; border-radius: 5px; flex: 0 0 auto; border: 1px solid rgba(255,255,255,.2); }
.palette .pal-item .pi-name { font-size: 13px; font-weight: 600; }
.palette .pal-item .pi-dim { font-size: 11px; color: var(--muted); }

#stage-host { flex: 1 1 auto; position: relative; min-width: 0; background:
  radial-gradient(circle at 30% 20%, #16233a, #0b1220); overflow: hidden; }

.inspector {
  width: 280px; flex: 0 0 auto; background: var(--panel); border-left: 1px solid var(--border);
  overflow-y: auto; padding: 14px;
}
.inspector h4 { margin: 0 0 12px; font-size: 14px; }
.inspector .empty-note { color: var(--muted); font-size: 13px; }
.inspector .row { display: flex; align-items: center; justify-content: space-between; gap: 8px; margin-bottom: 12px; }
.inspector .row label { font-size: 13px; color: var(--muted); }
.inspector input[type=range] { width: 100%; }
.inspector .val { font-variant-numeric: tabular-nums; }

/* placed-objects picker list */
.obj-list { display: flex; flex-direction: column; gap: 4px; max-height: 32vh; overflow-y: auto; margin-top: 6px; padding-right: 2px; }
.obj-row { display: flex; align-items: center; gap: 8px; padding: 6px 8px; border-radius: 6px; border: 1px solid var(--border); background: var(--bg-2); cursor: pointer; font-size: 13px; }
.obj-row:hover { background: var(--bg-3); }
.obj-row.active { border-color: var(--accent); background: #1e3a5f; }
.obj-row .obj-name { flex: 1; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.obj-row .obj-pos { color: var(--muted); font-variant-numeric: tabular-nums; font-size: 11px; }

/* 3D viewer */
#three-host { flex: 1 1 auto; position: relative; min-width: 0; background: #87b6e0; overflow: hidden; cursor: pointer; }
#three-host canvas { display: block; }
.hud {
  position: absolute; left: 0; right: 0; bottom: 0; padding: 10px 14px;
  background: linear-gradient(0deg, rgba(0,0,0,.55), transparent);
  color: #e6eefc; font-size: 13px; pointer-events: none; display: flex; gap: 18px; flex-wrap: wrap;
}
.hud kbd {
  background: rgba(255,255,255,.15); border: 1px solid rgba(255,255,255,.3);
  border-radius: 4px; padding: 1px 6px; font-family: inherit; font-size: 12px;
}
.lock-overlay {
  position: absolute; inset: 0; display: flex; align-items: center; justify-content: center;
  flex-direction: column; gap: 8px; background: rgba(8,14,28,.45); color: white; text-align: center;
}
.lock-overlay .big { font-size: 22px; font-weight: 700; }
.lock-overlay .sm { color: #cbd5e1; }
.crosshair {
  position: absolute; top: 50%; left: 50%; width: 8px; height: 8px; margin: -4px 0 0 -4px;
  border: 2px solid rgba(255,255,255,.7); border-radius: 50%; pointer-events: none; display: none;
}

/* loading + toast */
.loading { padding: 40px; text-align: center; color: var(--muted); }
.toast-wrap { position: fixed; bottom: 18px; left: 50%; transform: translateX(-50%); z-index: 300; display: flex; flex-direction: column; gap: 8px; }
.toast {
  background: var(--bg-2); border: 1px solid var(--border); color: var(--text);
  padding: 10px 16px; border-radius: 8px; box-shadow: var(--shadow); font-size: 14px;
}
.toast.err { border-color: #7f1d1d; }
.toast.ok { border-color: #065f46; }

a.link { color: #7dd3fc; cursor: pointer; }
.scale-note { font-size: 12px; color: var(--muted); }

/* ---- Auth screens + user box ---- */
.userbox { display: flex; align-items: center; gap: 8px; }
.auth-wrap { display: flex; align-items: center; justify-content: center; min-height: 100%; padding: 40px 20px; }
.auth-card { width: min(420px, 94vw); }
.auth-logo {
  width: 44px; height: 44px; border-radius: 12px;
  background: linear-gradient(135deg, var(--accent), #22d3ee);
  box-shadow: 0 6px 18px rgba(59,130,246,.4);
}
.auth-err { color: #fca5a5; font-size: 13px; min-height: 18px; margin-top: 12px; }