:root {
  --bg: #f4f5f9; --panel: #ffffff; --border: #dfe1ea; --text: #1f2233; --muted: #6b6f86;
  --accent: #5b5bd6; --accent-text: #ffffff; --input: #ffffff; --hover: #eceefc; --selected: #e3e4fb;
  --canvas: #e9eaf0; --danger: #e53935; --ok: #2e7d32; --shadow: 0 10px 30px rgba(20,20,40,.18);
}
html[data-theme="dark"] {
  --bg: #1b1c22; --panel: #23242c; --border: #34363f; --text: #eceef5; --muted: #9a9db0;
  --accent: #7c7cf0; --accent-text: #ffffff; --input: #2b2c35; --hover: #2f3040; --selected: #383a55;
  --canvas: #2a2b33; --shadow: 0 10px 30px rgba(0,0,0,.5);
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
html, body { margin: 0; height: 100%; }
body { font: 13px/1.45 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; color: var(--text); background: var(--bg); }
a { color: var(--accent); }
h1 { font-size: 22px; margin: 0 0 8px; }
h2 { font-size: 15px; margin: 0 0 8px; }
.muted { color: var(--muted); } .small { font-size: 12px; }
.error { color: var(--danger); font-weight: 600; margin: 6px 0; } .ok { color: var(--ok); font-weight: 600; margin: 6px 0; }
button, .button, input, select, textarea { font: inherit; color: inherit; }
button, .button { background: var(--input); border: 1px solid var(--border); border-radius: 6px; padding: 6px 12px; cursor: pointer; text-decoration: none; display: inline-block; }
button:hover, .button:hover { background: var(--hover); }
button:disabled { opacity: .45; cursor: default; }
button.primary, .button.primary { background: var(--accent); color: var(--accent-text); border-color: transparent; font-weight: 600; }
button.danger { color: var(--danger); }
button.link { background: none; border: none; color: var(--accent); padding: 0; }
button.active, button.checked { background: var(--selected); border-color: var(--accent); color: var(--accent); font-weight: 600; }
input[type=text], input[type=password], input[type=number], input:not([type]), select, textarea {
  background: var(--input); border: 1px solid var(--border); border-radius: 6px; padding: 6px 8px; width: 100%; }
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--accent); }
label { display: block; margin: 8px 0 4px; } label.inline { display: inline-flex; align-items: center; gap: 6px; margin: 0; }
label.inline select, label.inline input { width: auto; }
.row { display: flex; align-items: center; } .row.gap { gap: 8px; } .row.between { justify-content: space-between; } .row.wrap { flex-wrap: wrap; }
.card { background: var(--panel); border: 1px solid var(--border); border-radius: 12px; padding: 18px 20px; margin-bottom: 16px; }
.card-page { min-height: 100%; display: flex; align-items: center; justify-content: center; padding: 24px 16px; }
.card-page .card { width: 100%; max-width: 380px; box-shadow: var(--shadow); }
.card-page button.primary { width: 100%; margin-top: 12px; }
.topbar { display: flex; align-items: center; justify-content: space-between; padding: 10px 20px; background: var(--panel); border-bottom: 1px solid var(--border); }
.topbar .brand { font-weight: 700; text-decoration: none; color: var(--text); font-size: 16px; }
.topbar nav { display: flex; gap: 16px; align-items: center; } .topbar nav a { text-decoration: none; }
.content { max-width: 1100px; margin: 0 auto; padding: 20px 16px 40px; } .content.narrow { max-width: 620px; }
.project-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 14px; margin-top: 14px; }
.project-card { background: var(--panel); border: 1px solid var(--border); border-radius: 12px; padding: 14px 16px; display: flex; flex-direction: column; gap: 6px; }
.project-card .name { font-weight: 700; font-size: 15px; text-decoration: none; color: var(--text); }
.project-card .name:hover { color: var(--accent); }
.project-card .actions { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 6px; }
.project-card .actions button { padding: 4px 8px; font-size: 12px; }
.badge { display: inline-block; background: var(--selected); color: var(--accent); border-radius: 6px; padding: 1px 7px; font-size: 11px; font-weight: 600; }
.empty { text-align: center; color: var(--muted); padding: 40px; }
.table { width: 100%; border-collapse: collapse; margin: 10px 0; } .table th, .table td { text-align: left; padding: 6px 8px; border-bottom: 1px solid var(--border); vertical-align: top; }
.table th { color: var(--muted); font-weight: 600; font-size: 12px; } .table td.actions { white-space: nowrap; } .table td.actions button { padding: 3px 8px; font-size: 12px; margin-right: 4px; }
.invite-result { display: flex; gap: 8px; margin: 10px 0; } .invite-result input { flex: 1; font-family: ui-monospace, Menlo, monospace; font-size: 12px; }
.drop-overlay { position: fixed; inset: 0; background: rgba(91,91,214,.18); border: 4px dashed var(--accent); display: flex; align-items: center; justify-content: center; font-size: 24px; font-weight: 700; color: var(--accent); z-index: 50; pointer-events: none; }
.toast { position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%); background: #1f2233; color: #fff; padding: 10px 16px; border-radius: 8px; box-shadow: var(--shadow); z-index: 200; font-weight: 600; opacity: 0; transition: opacity .2s; }
.toast.show { opacity: 1; }

/* ---------------------------------------------------------------- editor */
body.editor { overflow: hidden; }
#app { display: flex; flex-direction: column; height: 100vh; }
.toolbar { display: flex; align-items: center; gap: 4px; padding: 5px 8px; background: var(--panel); border-bottom: 1px solid var(--border); flex-wrap: nowrap; overflow-x: auto; }
.tb-btn { border: 1px solid transparent; background: transparent; padding: 5px 9px; border-radius: 6px; white-space: nowrap; text-decoration: none; color: var(--text); }
.tb-btn:hover { background: var(--hover); } .tb-btn.active { background: var(--selected); color: var(--accent); font-weight: 600; }
.tb-btn.toggle.active { border-color: var(--accent); }
.tb-sep { width: 1px; height: 22px; background: var(--border); margin: 0 4px; } .tb-spacer { flex: 1; }
.tb-title { font-weight: 700; padding: 4px 8px; max-width: 280px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; cursor: text; }
.tb-title.dirty::before { content: "• "; color: var(--accent); }
.tb-label { display: flex; gap: 6px; align-items: center; margin: 0; white-space: nowrap; } .tb-label select { width: auto; padding: 4px 6px; }
.workspace { flex: 1; display: flex; min-height: 0; }
.side { width: 300px; flex: none; display: flex; flex-direction: column; background: var(--bg); border-right: 1px solid var(--border); min-height: 0; }
.side.right { width: 380px; border-right: none; border-left: 1px solid var(--border); }
.side.collapsed { display: none; }
.panel { display: flex; flex-direction: column; min-height: 0; flex: 1; }
.panel > header { padding: 7px 12px; font-weight: 600; border-bottom: 1px solid var(--border); background: var(--bg); }
.panel-body { flex: 1; overflow: auto; padding: 8px; }
.panel > footer { padding: 6px 8px; border-top: 1px solid var(--border); } .panel > footer button { padding: 4px 8px; font-size: 12px; }
#imagesPanel { flex: 1 1 45%; border-bottom: 1px solid var(--border); } #layersPanel { flex: 1 1 55%; }
.tabs { display: flex; border-bottom: 1px solid var(--border); background: var(--bg); }
.tab { flex: 1; border: none; border-radius: 0; background: transparent; padding: 8px; } .tab.active { color: var(--accent); font-weight: 600; box-shadow: inset 0 -2px var(--accent); }
.canvas-wrap { flex: 1; position: relative; min-width: 0; background: var(--canvas); }
#canvas { display: block; width: 100%; height: 100%; outline: none; touch-action: none; }
.canvas-empty { position: absolute; inset: 40px; border: 2px dashed #b9bcd0; border-radius: 14px; display: flex; align-items: center; justify-content: center; color: var(--muted); font-size: 18px; pointer-events: none; }
.readout { position: absolute; background: rgba(20,20,30,.85); color: #fff; padding: 4px 8px; border-radius: 5px; font-weight: 700; pointer-events: none; font-size: 13px; }
.statusbar { display: flex; justify-content: space-between; padding: 4px 12px; background: var(--panel); border-top: 1px solid var(--border); color: var(--muted); font-size: 12px; }
.statusbar .right { display: flex; gap: 18px; }
/* tree + lists */
.tree-group { margin: 2px 0; } .tree-group > .tree-row { font-weight: 600; }
.tree-row { display: flex; align-items: center; gap: 8px; padding: 4px 6px; border-radius: 6px; cursor: pointer; }
.tree-row:hover { background: var(--hover); } .tree-row.selected { background: var(--selected); }
.tree-row.drag-over { outline: 2px dashed var(--accent); }
.tree-row img { width: 44px; height: 44px; object-fit: cover; border-radius: 4px; background: #ccc; }
.tree-row .meta { display: flex; flex-direction: column; min-width: 0; } .tree-row .meta .sub { color: var(--muted); font-size: 11px; }
.tree-row .meta .name { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.tree-children { margin-left: 14px; }
.layer-row { display: flex; align-items: center; gap: 8px; padding: 4px 6px; border-radius: 6px; cursor: pointer; }
.layer-row:hover { background: var(--hover); } .layer-row.selected { background: var(--selected); }
.layer-row .sw { width: 12px; height: 12px; border-radius: 3px; border: 1px solid rgba(0,0,0,.25); flex: none; }
.layer-row .txt { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; } .layer-row.hidden .txt { opacity: .5; }
/* forms in panels */
.group { border: 1px solid var(--border); border-radius: 8px; padding: 10px 10px 6px; margin-bottom: 10px; background: var(--panel); }
.group > .gtitle { font-weight: 600; color: var(--muted); margin: -4px 0 8px; font-size: 12px; }
.frow { display: grid; grid-template-columns: 92px 1fr; gap: 6px 10px; align-items: center; margin-bottom: 7px; }
.frow > .flabel { text-align: right; color: var(--muted); font-size: 12px; }
.frow input[type=number] { width: 90px; } .frow input[type=range] { width: 100%; }
.frow .inline { display: flex; align-items: center; gap: 8px; }
.seg { display: flex; gap: 3px; } .seg button { flex: 1; padding: 4px 4px; font-size: 12px; min-width: 0; }
.colors { display: flex; gap: 4px; flex-wrap: wrap; } .colors button { width: 22px; height: 22px; padding: 0; border-radius: 11px; border: 1px solid rgba(0,0,0,.25); }
.colors button.checked { box-shadow: 0 0 0 2px var(--panel), 0 0 0 4px var(--text); }
.colorbtn { width: 48px; height: 24px; padding: 0; border-radius: 6px; border: 1px solid var(--border); }
.check { display: flex; align-items: center; gap: 6px; margin: 4px 0; } .check input { width: auto; }
.section-title { font-weight: 700; font-size: 14px; margin: 4px 0 10px; }
.btnrow { display: flex; gap: 6px; flex-wrap: wrap; margin: 6px 0; } .btnrow button { font-size: 12px; padding: 5px 8px; }
.unit-badge { background: var(--selected); color: var(--accent); padding: 3px 8px; border-radius: 6px; font-weight: 600; }
/* dialogs */
.modal-bg { position: fixed; inset: 0; background: rgba(0,0,0,.25); z-index: 100; display: flex; align-items: center; justify-content: center; }
.modal-bg.popup { background: transparent; pointer-events: none; }
.modal { background: var(--panel); border: 1px solid var(--border); border-radius: 12px; padding: 16px 18px; min-width: 330px; max-width: min(560px, 94vw); box-shadow: var(--shadow); pointer-events: auto; max-height: 90vh; overflow: auto; }
.modal.popup { position: absolute; }
.modal h3 { margin: 0 0 10px; font-size: 15px; }
.modal .buttons { display: flex; justify-content: flex-end; gap: 8px; margin-top: 12px; }
.modal .hint { color: var(--muted); font-size: 12px; margin-top: 8px; }
.modal textarea { min-height: 70px; resize: vertical; }
.modal table.kv td { padding: 3px 10px 3px 0; } .modal table.kv td:first-child { font-weight: 600; white-space: nowrap; }
.menu { position: absolute; background: var(--panel); border: 1px solid var(--border); border-radius: 8px; padding: 4px; box-shadow: var(--shadow); z-index: 150; min-width: 200px; }
.menu button { display: block; width: 100%; text-align: left; border: none; background: none; padding: 6px 12px; border-radius: 5px; }
.menu button:hover { background: var(--hover); } .menu hr { border: none; border-top: 1px solid var(--border); margin: 4px 0; }
.menu button.checked::before { content: "✓ "; } .menu button.unchecked::before { content: "\2003"; }
@media (max-width: 900px) { .side { width: 240px; } .side.right { width: 300px; } }

/* logo (black ink on transparent; inverted in the dark theme) */
.logo { display: block; width: 240px; max-width: 100%; margin: 0 auto 14px; }
.logo-small { height: 26px; display: block; } .logo-tb { height: 22px; display: block; }
html[data-theme="dark"] .logo, html[data-theme="dark"] .logo-small, html[data-theme="dark"] .logo-tb { filter: invert(1); }
.brand-btn { padding: 3px 6px; }
.tb-btn.attention { background: #fff3cd; color: #7a4d00; border-color: #f0c36d; font-weight: 600; }
html[data-theme="dark"] .tb-btn.attention { background: #4a3a10; color: #ffd56b; border-color: #8a6a1a; }