/* PlanForge studio — minimal, readable */
:root {
  --bg: #0f172a;
  --panel: #1e293b;
  --border: #334155;
  --text: #f1f5f9;
  --muted: #94a3b8;
  --accent: #38bdf8;
  --ok: #4ade80;
  --err: #f87171;
  --radius: 10px;
  font-family: "Segoe UI", system-ui, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}

a {
  color: var(--accent);
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1.25rem;
  border-bottom: 1px solid var(--border);
  background: var(--panel);
}

.site-header h1 {
  margin: 0;
  font-size: 1.1rem;
  font-weight: 600;
}

.site-header nav {
  display: flex;
  gap: 1rem;
  font-size: 0.9rem;
}

.site-main {
  max-width: min(1600px, 99vw);
  margin: 0 auto;
  padding: 1rem 1.25rem 2rem;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  margin-bottom: 1.25rem;
}

.panel h2 {
  margin: 0 0 0.75rem;
  font-size: 1rem;
  font-weight: 600;
  color: var(--muted);
}

.upload-row {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: flex-end;
}

.field label {
  display: block;
  font-size: 0.8rem;
  color: var(--muted);
  margin-bottom: 0.35rem;
}

.field select,
.field input[type="text"] {
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.5rem 0.65rem;
  font-size: 0.95rem;
}

.drop-zone {
  flex: 1;
  min-width: 200px;
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
}

.drop-zone:hover,
.drop-zone.dragover {
  border-color: var(--accent);
  background: rgba(56, 189, 248, 0.06);
}

.drop-zone input[type="file"] {
  display: none;
}

.drop-zone .hint {
  font-size: 0.85rem;
  color: var(--muted);
}

.drop-zone .filename {
  margin-top: 0.5rem;
  font-size: 0.9rem;
  word-break: break-all;
}

.btn {
  border: none;
  border-radius: 8px;
  padding: 0.55rem 1.2rem;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
}

.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.btn-primary {
  background: var(--accent);
  color: var(--bg);
}

.btn-primary:not(:disabled):hover {
  filter: brightness(1.08);
}

.steps {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1rem;
}

.step {
  font-size: 0.75rem;
  padding: 0.25rem 0.6rem;
  border-radius: 999px;
  background: var(--bg);
  color: var(--muted);
  border: 1px solid var(--border);
}

.step.active {
  color: var(--accent);
  border-color: var(--accent);
}

.step.done {
  color: var(--ok);
  border-color: rgba(74, 222, 128, 0.5);
}

.status-msg {
  margin-top: 0.75rem;
  font-size: 0.88rem;
  min-height: 1.25rem;
}

.status-msg.error {
  color: var(--err);
}

.status-msg.ok {
  color: var(--ok);
}

.result-panel {
  min-height: 120px;
}

.result-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1.25rem;
  margin-bottom: 0.65rem;
}

.result-toolbar label {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.85rem;
  color: var(--muted);
  cursor: pointer;
  user-select: none;
}

.result-toolbar input[type="checkbox"] {
  accent-color: var(--accent);
  width: 1rem;
  height: 1rem;
}

.result-hint {
  font-size: 0.8rem;
  color: var(--muted);
}

/* Scroll the full SVG at native resolution (no clipping). */
.svg-viewport {
  overflow: auto;
  overflow-x: auto;
  overflow-y: auto;
  max-height: calc(100vh - 14rem);
  min-height: min(360px, 50vh);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: #f8fafc;
  -webkit-overflow-scrolling: touch;
  scrollbar-gutter: stable;
}

.svg-host {
  display: inline-block;
  padding: 12px;
  vertical-align: top;
}

/* Native width/height from the file — scroll viewport to see edges */
.svg-host svg.layout-svg {
  display: block;
  max-width: none;
  width: auto;
  height: auto;
  overflow: visible;
  vertical-align: top;
}

/* Optional: scale to panel width (may feel cramped on wide sheets) */
.svg-host.fit-width svg.layout-svg {
  max-width: 100%;
  width: 100%;
  height: auto;
}

.validation-list {
  margin: 0.75rem 0 0;
  padding-left: 1.25rem;
  font-size: 0.85rem;
  color: #fbbf24;
}

.empty-result {
  color: var(--muted);
  font-size: 0.9rem;
  margin: 0;
}

.norm-meta {
  margin: 0.5rem 0 0;
  font-size: 0.8rem;
  color: #cbd5e1;
  line-height: 1.4;
  word-break: break-word;
}

.norm-meta.warn {
  color: #fbbf24;
}

/* ── View tabs (Diagram / DXF View) ────────────────────────────────────── */
.view-tabs {
  display: flex;
  gap: 0;
  margin-bottom: 0.75rem;
  border-bottom: 1px solid var(--border);
}
.view-tab {
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--muted);
  font-size: 0.875rem;
  font-weight: 500;
  padding: 0.4rem 1.1rem;
  cursor: pointer;
  transition: color 0.12s, border-color 0.12s;
  font-family: inherit;
  margin-bottom: -1px;
}
.view-tab:hover { color: var(--text); }
.view-tab.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

/* ── DXF viewer ─────────────────────────────────────────────────────────── */
.dxf-toolbar {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  margin-bottom: 0.5rem;
  flex-wrap: wrap;
}
.dxf-tool-btn {
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 5px;
  padding: 0.22rem 0.65rem;
  font-size: 0.85rem;
  cursor: pointer;
  font-family: inherit;
  line-height: 1.6;
  transition: border-color 0.12s, color 0.12s;
}
.dxf-tool-btn:hover { border-color: var(--accent); color: var(--accent); }
.dxf-zoom-label {
  font-size: 0.78rem;
  color: var(--muted);
  min-width: 4rem;
  font-family: monospace;
  text-align: center;
}
.dxf-sep {
  display: inline-block;
  width: 1px;
  height: 1rem;
  background: var(--border);
  margin: 0 0.15rem;
}
.dxf-coords {
  font-size: 0.75rem;
  color: var(--muted);
  font-family: monospace;
  min-width: 18ch;
}
.dxf-workspace {
  display: flex;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  background: #0d1117;
  height: calc(100vh - 14rem);
  min-height: 400px;
}
#dxf-canvas {
  flex: 1;
  display: block;
  cursor: crosshair;
  min-width: 0;
}
.dxf-layers-panel {
  width: 168px;
  flex-shrink: 0;
  background: #111827;
  border-left: 1px solid var(--border);
  overflow-y: auto;
  padding: 0.5rem 0.45rem;
}
.dxf-layers-title {
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.07em;
  margin-bottom: 0.45rem;
  padding-bottom: 0.3rem;
  border-bottom: 1px solid var(--border);
}
.dxf-layer-row {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.2rem 0.2rem;
  font-size: 0.74rem;
  color: #cbd5e1;
  cursor: pointer;
  border-radius: 3px;
  transition: background 0.1s;
  user-select: none;
}
.dxf-layer-row:hover { background: rgba(255,255,255,.05); }
.dxf-layer-row.hidden-layer { opacity: 0.35; }
.dxf-layer-swatch {
  width: 9px;
  height: 9px;
  border-radius: 2px;
  flex-shrink: 0;
  border: 1px solid rgba(255,255,255,.15);
}
.dxf-layer-name {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.dxf-layer-check {
  flex-shrink: 0;
  accent-color: var(--accent);
  cursor: pointer;
  width: 12px;
  height: 12px;
}

/* ── 3D massing viewer (Tier A) ───────────────────────────── */
.massing-workspace {
  position: relative;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  /* Must track BACKGROUND in massing-viewer.js — a dark frame around a light
     canvas reads as a rendering fault. */
  background: #f4f4f6;
  height: calc(100vh - 14rem);
  min-height: 400px;
}
.massing-host {
  position: absolute;
  inset: 0;
}
.massing-host canvas { display: block; }

.massing-toggle {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  font-size: .8rem;
  color: #94a3b8;
  cursor: pointer;
  user-select: none;
  white-space: nowrap;
}
.massing-toggle input { cursor: pointer; }

/* Dimension callouts, rendered as DOM text over the canvas. */
.massing-label {
  font: 600 11px/1.2 system-ui, sans-serif;
  color: #1e293b;
  background: rgba(255, 255, 255, .88);
  border: 1px solid #b8bcc4;
  border-radius: 3px;
  padding: 1px 5px;
  white-space: nowrap;
  pointer-events: none;
}
.massing-label--overall_width,
.massing-label--overall_depth { color: #1d4ed8; border-color: #93b4e8; }
.massing-label--ceiling_height { color: #92400e; border-color: #d9a441; }
.massing-label--fixture_extents { font-size: 10px; color: #475569; }

/* Z provenance. An assumed ceiling height cannot be detected downstream, so
   the warning is non-dismissible while it applies. */
.massing-badge {
  position: absolute;
  left: .75rem;
  bottom: .75rem;
  z-index: 2;
  padding: .4rem .8rem;
  border-radius: 4px;
  font-size: .76rem;
  font-weight: 600;
  color: #7c2d12;
  background: rgba(254, 243, 199, .96);
  border: 1px solid #d97706;
  box-shadow: 0 1px 3px rgba(0, 0, 0, .12);
  pointer-events: none;
}

.massing-pick {
  position: absolute;
  top: .75rem;
  right: .75rem;
  z-index: 3;
  width: 240px;
  max-width: calc(100% - 1.5rem);
  background: rgba(255, 255, 255, .97);
  border: 1px solid #c3c7cf;
  border-radius: 6px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, .14);
  font-size: .8rem;
  color: #1e293b;
}
.massing-pick-close {
  position: absolute;
  top: .3rem;
  right: .4rem;
  width: 1.4rem;
  height: 1.4rem;
  line-height: 1;
  border: none;
  background: transparent;
  color: #64748b;
  font-size: 1.1rem;
  cursor: pointer;
  border-radius: 3px;
}
.massing-pick-close:hover { background: #e8e8ec; color: #1e293b; }
.massing-pick-body { padding: .8rem .9rem .7rem; }

/* ── Photoreal render (Stage 2: Blender/Cycles) ──────────────────────── */
.photoreal-mode-tabs {
  margin-bottom: 0.5rem;
}
.photoreal-mode-tabs .view-tab {
  font-size: 0.8rem;
  padding: 0.35rem 0.9rem;
}
.photoreal-workspace {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: auto;
  background: #f4f4f6;
  height: calc(100vh - 16rem);
  min-height: 380px;
}
.photoreal-empty {
  max-width: 32rem;
  padding: 0 2rem;
  text-align: center;
  font-size: .85rem;
  line-height: 1.5;
  color: #64748b;
}
.photoreal-image {
  max-width: 100%;
  max-height: 100%;
  display: block;
}
.massing-pick-title {
  font-weight: 700;
  font-size: .88rem;
  margin-bottom: .5rem;
  padding-right: 1.2rem;
  word-break: break-word;
}
.massing-pick-row {
  display: flex;
  justify-content: space-between;
  gap: .6rem;
  padding: .18rem 0;
  border-top: 1px solid #eef0f3;
}
.massing-pick-row:first-of-type { border-top: none; }
.massing-pick-row span { color: #64748b; }
.massing-pick-row b { font-weight: 600; text-align: right; }

.massing-error {
  position: absolute;
  inset: 0;
  background: #f4f4f6;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  padding: 2rem;
  text-align: center;
  color: #334155;
  font-size: .9rem;
}
.massing-error strong { color: #b91c1c; font-size: 1rem; }
.massing-error p { margin: 0; max-width: 46ch; line-height: 1.5; }
.massing-error pre {
  margin: .25rem 0 0;
  padding: .5rem .75rem;
  max-width: 60ch;
  overflow-x: auto;
  font-size: .74rem;
  color: #475569;
  background: #e8e8ec;
  border: 1px solid #c3c7cf;
  border-radius: 4px;
}
.massing-error-hint { color: #64748b; font-size: .8rem; }

.massing-select {
  background: #0f172a;
  color: #cbd5e1;
  border: 1px solid #334155;
  border-radius: 4px;
  padding: .2rem .4rem;
  font-size: .8rem;
  cursor: pointer;
}