:root { --sidebar-w: 420px; --chat-w: 380px; --plate-h: 40vh; --readouts-h: 190px; --bg: #14161a; --panel: #1d2026; --border: #2c3038; --text: #e6e6e6; --muted: #9aa0a8; --accent: #e0a23a; --danger: #d9534f; }
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; background: var(--bg); color: var(--text); font: 13px/1.4 system-ui, sans-serif; }
#app { display: grid; grid-template-columns: var(--sidebar-w) 6px 1fr; height: 100vh; }
#app.with-chat { grid-template-columns: var(--sidebar-w) 6px 1fr 6px var(--chat-w); }
.splitter.hidden, #chat.hidden { display: none; }
.splitter { background: var(--border); flex: none; }
.splitter.vertical { width: 6px; cursor: col-resize; }
.splitter.horizontal { height: 6px; cursor: row-resize; }
.splitter:hover, .splitter.active { background: var(--accent); }
#sidebar { background: var(--panel); border-right: 1px solid var(--border); display: flex; flex-direction: column; min-height: 0; }
#sidebar header { padding: 10px 12px 4px; display: flex; align-items: baseline; gap: 8px; }
.chat-toggle { margin-left: auto; padding: 2px 10px; }
#sidebar h1 { margin: 0; font-size: 18px; display: inline; }
.subtitle { color: var(--muted); margin-left: 8px; }
.run { padding: 6px 12px; border-bottom: 1px solid var(--border); }
.row { display: flex; gap: 6px; align-items: center; margin: 4px 0; }
.row label { display: flex; gap: 6px; align-items: center; flex: 1; }
.row select { flex: 1; }
.buttons button { flex: 1; }
button { background: #2a2e36; color: var(--text); border: 1px solid var(--border); border-radius: 4px; padding: 5px 10px; cursor: pointer; }
button:hover:not(:disabled) { background: #343943; }
button:disabled { opacity: 0.45; cursor: default; }
button.primary { background: var(--accent); color: #111; border-color: var(--accent); font-weight: 600; }
select, input[type="text"], input[type="number"] { background: #111318; color: var(--text); border: 1px solid var(--border); border-radius: 3px; padding: 3px 5px; }
progress { flex: 1; height: 10px; }
.muted { color: var(--muted); }
.tabs { display: flex; border-bottom: 1px solid var(--border); }
.tabs button { flex: 1; border: none; border-radius: 0; background: transparent; padding: 6px; color: var(--muted); }
.tabs button.active { color: var(--text); border-bottom: 2px solid var(--accent); }
.tab { flex: 1; min-height: 0; overflow: auto; }
.tab.hidden { display: none; }
#editor { height: 100%; }
#editor .cm-editor { height: 100%; font-size: 12px; }
#editor .cm-scroller { font-family: ui-monospace, Menlo, Consolas, monospace; }
#issues { list-style: none; margin: 0; padding: 4px 12px; max-height: 120px; overflow: auto; border-top: 1px solid var(--border); font-size: 12px; }
#issues li { color: var(--danger); }
#issues li.ok { color: #6fbf73; }
#issues code { color: var(--text); }
#form { padding: 6px 10px; }
#form details { margin-bottom: 4px; }
#form summary { cursor: pointer; font-weight: 600; padding: 3px 0; }
#form .grid { display: grid; grid-template-columns: 1fr 120px; gap: 3px 8px; align-items: center; padding: 2px 0 6px 10px; }
#form .grid label { color: var(--muted); }
#form .grid label span.unit { color: #6d737b; margin-left: 4px; }
#form .hit { border: 1px solid var(--border); border-radius: 4px; padding: 4px 8px; margin: 4px 0; }
#form .hit .head { display: flex; justify-content: space-between; align-items: center; }
#form input[type="number"] { width: 100%; }
#summary { padding: 6px 12px; font-family: ui-monospace, Menlo, Consolas, monospace; font-size: 12px; white-space: pre-wrap; }
main { display: flex; flex-direction: column; min-height: 0; min-width: 0; }
main section { min-height: 0; display: flex; flex-direction: column; }
#plate-section { height: var(--plate-h); flex: none; }
#spec-section { flex: 1; min-height: 60px; }
#playback { flex: none; border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.toolbar { display: flex; gap: 14px; align-items: center; padding: 4px 10px; font-weight: 600; }
.toolbar label { font-weight: normal; color: var(--muted); display: flex; gap: 6px; align-items: center; }
canvas { flex: 1; width: 100%; height: 100%; display: block; min-height: 0; }
#playback { flex-direction: row; align-items: center; gap: 10px; padding: 6px 10px; }
#playback #position { flex: 1; }
#playback label { color: var(--muted); display: flex; gap: 6px; align-items: center; }
#readouts { padding: 6px 10px; height: var(--readouts-h); flex: none; overflow: auto; font-size: 12px; }
#readouts table { border-collapse: collapse; margin-right: 24px; display: inline-table; vertical-align: top; }
#readouts th, #readouts td { padding: 1px 8px; text-align: right; border-bottom: 1px solid var(--border); }
#readouts th { color: var(--muted); font-weight: normal; }
#readouts .log { font-family: ui-monospace, Menlo, Consolas, monospace; color: var(--muted); white-space: pre-wrap; margin-top: 4px; }
@media (max-width: 900px) { #app { grid-template-columns: 1fr; grid-template-rows: auto auto 1fr; } #sidebar { max-height: 45vh; } .splitter.vertical { display: none; } }

/* chat panel */
#chat { background: var(--panel); border-left: 1px solid var(--border); display: flex; flex-direction: column; min-height: 0; min-width: 0; }
.chat-head { display: flex; align-items: center; gap: 8px; padding: 8px 10px; border-bottom: 1px solid var(--border); }
.chat-head .spacer { flex: 1; }
.chat-head .dot { width: 9px; height: 9px; border-radius: 50%; background: #666; }
.chat-head .dot.on { background: #6fbf73; } .chat-head .dot.busy { background: var(--accent); } .chat-head .dot.off { background: #888; }
.chat-help { padding: 8px 10px; color: var(--muted); font-size: 12px; border-bottom: 1px solid var(--border); line-height: 1.5; }
.chat-help code { color: var(--text); font-size: 11px; word-break: break-all; }
.chat-log { flex: 1; overflow: auto; padding: 8px 10px; display: flex; flex-direction: column; gap: 8px; }
.msg { max-width: 100%; border-radius: 8px; padding: 6px 10px; font-size: 13px; line-height: 1.45; white-space: pre-wrap; word-break: break-word; }
.msg.user { background: #2c3a55; align-self: flex-end; }
.msg.assistant { background: #262a32; white-space: normal; }
.msg.assistant p { margin: 0 0 6px; } .msg.assistant p:last-child { margin: 0; }
.msg.assistant pre { background: #111318; padding: 6px 8px; border-radius: 4px; overflow: auto; font-size: 11px; margin: 4px 0; }
.msg.assistant code { font-family: ui-monospace, Menlo, Consolas, monospace; font-size: 12px; }
.msg.assistant ul, .msg.assistant ol { margin: 2px 0 6px 18px; padding: 0; }
.msg.assistant h4 { margin: 4px 0; }
.msg.tool { color: var(--muted); font-family: ui-monospace, Menlo, Consolas, monospace; font-size: 11px; padding: 2px 6px; }
.msg.tool::before { content: "▸ "; }
.msg.system { color: var(--muted); font-size: 11px; font-style: italic; padding: 2px 6px; align-self: center; }
.chat-input { border-top: 1px solid var(--border); padding: 8px 10px; display: flex; flex-direction: column; gap: 6px; }
.chat-input textarea { width: 100%; resize: vertical; background: #111318; color: var(--text); border: 1px solid var(--border); border-radius: 4px; padding: 6px; font: inherit; }
.chat-buttons { display: flex; justify-content: flex-end; gap: 6px; }

.movie-bar { border-top: 1px solid var(--border); font-weight: normal; }
.movie-bar #movie-pos { flex: 1; min-width: 60px; }
.movie-bar input[type="number"] { width: 70px; }
.toolbar input[type="number"] { background: #111318; color: var(--text); border: 1px solid var(--border); border-radius: 3px; padding: 2px 4px; }