/* DIY Workshop — dark desktop-first UI */
* { box-sizing: border-box; }
:root {
  --bg: #171c20; --panel: #1f262b; --panel2: #242c32; --line: #323c44;
  --text: #dfe6ea; --muted: #90a0aa; --accent: #1e88e5; --accent2: #ff8f00;
  --ok: #43a047; --err: #e53935;
}
html, body { height: 100%; margin: 0; }
@supports (height: 100dvh) { body { height: 100dvh; } } /* mobile: track the real visible viewport */
body { background: var(--bg); color: var(--text); font: 14px/1.45 system-ui, "Segoe UI", Roboto, sans-serif; display: flex; flex-direction: column; overflow: hidden; }

button { background: var(--panel2); color: var(--text); border: 1px solid var(--line); border-radius: 6px; padding: 6px 12px; cursor: pointer; font: inherit; }
button:hover { border-color: var(--accent); }
button.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
button.primary:hover { filter: brightness(1.15); }
input, textarea, select { background: #141a1e; color: var(--text); border: 1px solid var(--line); border-radius: 6px; padding: 7px 9px; font: inherit; }
input:focus, textarea:focus { outline: none; border-color: var(--accent); }
.hidden { display: none !important; }
a { color: #64b5f6; }

/* Top bar */
#topbar { display: flex; align-items: center; justify-content: space-between; padding: 8px 14px; background: var(--panel); border-bottom: 1px solid var(--line); flex: 0 0 auto; }
.brand { font-weight: 700; font-size: 16px; }
.brand .sub { font-weight: 400; color: var(--muted); font-size: 12px; margin-left: 8px; }
.topbtns { display: flex; gap: 8px; align-items: center; }
.dot { width: 10px; height: 10px; border-radius: 50%; background: #777; display: inline-block; margin-left: 4px; }
.dot.ok { background: var(--ok); } .dot.err { background: var(--err); }

/* Layout */
#layout { flex: 1 1 auto; display: flex; min-height: 0; }
#chatPanel { width: 360px; min-width: 200px; flex: 0 0 auto; display: flex; flex-direction: column; background: var(--panel); border-right: 1px solid var(--line); }
#chatPanel.collapsed { width: 0 !important; min-width: 0; overflow: hidden; border-right: none; }
#rightPane { flex: 1; display: flex; flex-direction: column; min-width: 0; }

/* Splitters (resizable sections) */
#vSplit { flex: 0 0 6px; cursor: col-resize; background: var(--bg); border-right: 1px solid var(--line); position: relative; touch-action: none; }
#hSplit { flex: 0 0 6px; cursor: row-resize; background: var(--bg); border-top: 1px solid var(--line); touch-action: none; }
#chatSplit { flex: 0 0 6px; cursor: row-resize; background: var(--bg); border-top: 1px solid var(--line); touch-action: none; }
#vSplit:hover, #hSplit:hover, #chatSplit:hover { background: var(--accent); }
#chatCollapse { position: absolute; top: 50%; left: 50%; transform: translate(-50%,-50%); width: 20px; height: 48px; padding: 0; font-size: 10px; line-height: 1; border-radius: 6px; z-index: 6; }
body.resizing { user-select: none; }
body.resizing canvas, body.resizing iframe { pointer-events: none; }

/* Chat */
#chatLog { flex: 1; overflow-y: auto; padding: 12px; display: flex; flex-direction: column; gap: 10px; }
.msg { border-radius: 10px; padding: 9px 12px; max-width: 95%; white-space: pre-wrap; word-wrap: break-word; }
.msg.user { background: #1c3a55; align-self: flex-end; }
.msg.ai { background: var(--panel2); align-self: flex-start; }
.msg.sys { background: transparent; color: var(--muted); font-size: 12px; align-self: center; text-align: center; }
.msg.err { background: #3c2022; color: #ef9a9a; align-self: flex-start; }
.msg .qbtn { display: block; margin-top: 6px; text-align: left; width: 100%; background: #2b3640; }
.msg details { margin-top: 6px; color: var(--muted); font-size: 12px; }
.msg details pre { max-height: 160px; overflow: auto; white-space: pre-wrap; }
.thinking { color: var(--muted); font-style: italic; }
.thinking::after { content: '…'; animation: dots 1.2s infinite; }
@keyframes dots { 0% { content: ''; } 33% { content: '.'; } 66% { content: '..'; } 100% { content: '...'; } }

#selChip { margin: 0 12px; padding: 5px 10px; background: #143048; border: 1px solid var(--accent); border-radius: 20px; font-size: 12px; display: flex; align-items: center; gap: 8px; }
#selChip button { padding: 0 6px; border: none; background: transparent; color: var(--muted); }
#chatInputRow { padding: 10px 12px; border-top: 1px solid var(--line); display: flex; gap: 8px; flex: 0 0 auto; min-height: 70px; }
#chatInput { flex: 1; resize: none; min-height: 0; }
.chatBtns { display: flex; flex-direction: column; gap: 6px; }

/* Viewer */
#viewerToolbar { display: flex; align-items: center; gap: 12px; padding: 6px 12px; background: var(--panel); border-bottom: 1px solid var(--line); flex-wrap: wrap; }
.modeGroup { display: flex; border: 1px solid var(--line); border-radius: 6px; overflow: hidden; }
.modeBtn { border: none; border-radius: 0; padding: 6px 14px; }
.modeBtn.active { background: var(--accent); color: #fff; }
.explodeWrap { display: flex; align-items: center; gap: 6px; color: var(--muted); font-size: 13px; }
.chk { color: var(--muted); font-size: 13px; display: flex; align-items: center; gap: 4px; }
.hint { color: var(--muted); font-size: 11px; margin-left: auto; }

#viewerWrap { position: relative; flex: 1; min-height: 200px; }
#viewport { position: absolute; inset: 0; }
#viewport a-scene { width: 100%; height: 100%; }
#aframeLoading { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; color: var(--muted); }

/* Part card */
#partCard { position: absolute; top: 12px; right: 12px; width: 300px; background: rgba(31,38,43,0.96); border: 1px solid var(--line); border-radius: 10px; padding: 10px 12px; z-index: 5; }
.cardHead { display: flex; justify-content: space-between; align-items: center; margin-bottom: 6px; }
.cardHead button { border: none; background: transparent; color: var(--muted); padding: 0 4px; }
#pcBody { font-size: 13px; color: var(--text); max-height: 260px; overflow-y: auto; }
#pcBody .kv { color: var(--muted); }
#pcBody ul { margin: 4px 0 8px 18px; padding: 0; }
.cardActions { display: flex; gap: 6px; align-items: center; margin-top: 8px; flex-wrap: wrap; }
.cardActions .mini { font-size: 11px; color: var(--muted); display: flex; align-items: center; gap: 4px; }
.cardActions input[type=color] { width: 34px; height: 30px; padding: 2px; }
.cardActions input[type=range] { width: 70px; }

/* Assembly bar */
#asmBar { position: absolute; left: 50%; transform: translateX(-50%); bottom: 14px; display: flex; align-items: center; gap: 10px; background: rgba(31,38,43,0.96); border: 1px solid var(--accent2); border-radius: 10px; padding: 8px 12px; max-width: 80%; z-index: 5; }
#asmInfo { display: flex; flex-direction: column; max-width: 560px; }
#asmInfo b { color: var(--accent2); }
#asmInfo span { font-size: 13px; }

/* Tabs */
#tabs { flex: 0 0 auto; height: 220px; display: flex; flex-direction: column; background: var(--panel); border-top: 1px solid var(--line); }
.tabBtns { display: flex; gap: 2px; padding: 6px 10px 0; align-items: center; }
.tabBtn { border-radius: 6px 6px 0 0; border-bottom: none; }
.tabBtn.active { background: var(--panel2); border-color: var(--accent); color: #fff; }
.tabBtns .right { margin-left: auto; margin-bottom: 4px; }
.tabBody { display: none; flex: 1; overflow-y: auto; padding: 10px 14px; background: var(--panel2); }
.tabBody.active { display: block; }

table.cut { width: 100%; border-collapse: collapse; font-size: 13px; }
table.cut th, table.cut td { text-align: left; padding: 5px 8px; border-bottom: 1px solid var(--line); }
table.cut th { color: var(--muted); font-weight: 600; }
table.cut tr:hover td { background: #2a333a; cursor: pointer; }
.stepItem { padding: 8px 10px; border-left: 3px solid var(--line); margin-bottom: 8px; cursor: pointer; }
.stepItem:hover, .stepItem.cur { border-left-color: var(--accent2); background: #2a333a; }
.stepItem b { display: block; }
.stepItem small { color: var(--muted); }
.finRow { margin-bottom: 10px; }
.finPresets { display: flex; gap: 6px; flex-wrap: wrap; margin: 8px 0; }
.finPresets button { font-size: 12px; }

/* Modals */
.modal { position: fixed; inset: 0; background: rgba(0,0,0,0.55); display: flex; align-items: center; justify-content: center; z-index: 50; }
.modalBox { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 18px 20px; width: 560px; max-width: 94vw; max-height: 90vh; overflow-y: auto; }
.modalBox h2 { margin: 0 0 12px; font-size: 17px; }
.modalBox label { display: block; margin-bottom: 10px; color: var(--muted); font-size: 13px; }
.modalBox label input, .modalBox label select { width: 100%; margin-top: 4px; }
.modalBox small { display: block; margin-top: 4px; }
.row2 { display: flex; gap: 12px; } .row2 label { flex: 1; }
.noteBox { background: #14232e; border: 1px solid #274a63; border-radius: 8px; padding: 10px 12px; font-size: 12.5px; color: #b6c8d4; margin-bottom: 12px; }
.modalBox.wide { width: 960px; }
.modalBox h3 { margin: 12px 0 6px; font-size: 14px; }
.invWrap { max-height: 235px; overflow-y: auto; margin-bottom: 6px; border: 1px solid var(--line); border-radius: 6px; }
.invWrap table { margin: 0; }
.invWrap td { padding: 2px 4px; }
.invWrap input { width: 100%; padding: 3px 6px; font-size: 12.5px; }
.invWrap .invDel { padding: 2px 7px; border: none; background: transparent; color: var(--muted); }
.invWrap .invDel:hover { color: var(--err); }
.modalBox label.chkline { display: flex; align-items: center; gap: 8px; }
.modalBox label.chkline input { width: auto; margin-top: 0; }
.modalBtns { display: flex; gap: 8px; align-items: center; }
.spacer { flex: 1; }
#setTestResult { font-size: 12px; color: var(--muted); max-width: 200px; }

.libItem { display: flex; gap: 12px; align-items: center; padding: 8px; border-bottom: 1px solid var(--line); }
.libItem img { width: 84px; height: 56px; object-fit: cover; border-radius: 6px; background: #10151a; }
.libItem .noThumb { width: 84px; height: 56px; border-radius: 6px; background: #10151a; display: flex; align-items: center; justify-content: center; color: var(--muted); }
.libItem .libMeta { flex: 1; } .libItem .libMeta small { color: var(--muted); display: block; }
.libItem .libBtns { display: flex; gap: 6px; }

/* New tools */
.activeTool { background: var(--accent) !important; color: #fff; border-color: var(--accent) !important; }
button:disabled { opacity: 0.4; cursor: default; }
button:disabled:hover { border-color: var(--line); }
.optGroup { margin: 10px 0; font-size: 13px; }
.optRow { margin: 4px 0; }
.costT input { padding: 3px 6px; }
#pcMove { border-top: 1px solid var(--line); margin-top: 8px; padding-top: 8px; }
#pcMove button { padding: 2px 8px; font-size: 12px; }
#pcMove select { padding: 3px 5px; }

/* Mobile / small screens (body.mobile is set by layout.js) */
@media (pointer: coarse) {
  #vSplit, #hSplit, #chatSplit { flex-basis: 14px; } /* touch-friendly grab targets */
  #chatCollapse { font-size: 12px; }
  button { padding: 8px 12px; }
}
body.mobile #topbar { flex-wrap: wrap; row-gap: 6px; padding: 6px 10px; }
body.mobile .topbtns { flex-wrap: wrap; }
body.mobile .brand .sub { display: none; }
body.mobile #layout { flex-direction: column; }
body.mobile #chatPanel { width: 100% !important; min-width: 0; height: 38%; min-height: 120px; border-right: none; }
body.mobile #chatPanel.collapsed { height: 0 !important; min-height: 0; width: 100% !important; }
body.mobile #vSplit { cursor: row-resize; border-right: none; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
body.mobile #chatCollapse { width: 56px; height: 20px; }
body.mobile #viewerToolbar { gap: 8px; padding: 6px 8px; }
body.mobile .hint { display: none; }
body.mobile #tabs { height: 170px; }
body.mobile #partCard { width: auto; max-width: calc(100vw - 24px); left: 12px; right: 12px; }
body.mobile #asmBar { max-width: 94%; }
body.mobile #chatLog { padding: 8px; }
body.mobile #chatInputRow { padding: 8px; }

/* Print: only cut list + steps */
@media print {
  body * { visibility: hidden; }
  #printSheet, #printSheet * { visibility: visible; }
  #printSheet { position: absolute; left: 0; top: 0; width: 100%; color: #000; background: #fff; padding: 20px; }
  #printSheet table { border-collapse: collapse; width: 100%; }
  #printSheet th, #printSheet td { border: 1px solid #999; padding: 4px 8px; font-size: 12px; text-align: left; }
  #printSheet h1 { font-size: 20px; } #printSheet h2 { font-size: 16px; margin-top: 18px; }
}