/* ── Reset & base ─────────────────────────────── */
/* v2: Series system + 17-space column builder */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #f4f6fb;
  --bg2: #ffffff;
  --bg3: #eef1f8;
  --border: #dde2ee;
  --text: #1a2340;
  --text2: #5a6a8a;
  --accent: #2563eb;
  --accent-h: #1d4ed8;
  --accent2: #2563eb;
  --header-h: 56px;
  --sidebar-w: 340px;
  --active-sidebar-w: 340px;   /* updated by JS on sidebar toggle */
  --radius: 10px;
  --radius-sm: 6px;
  --trans: 0.18s ease;
}

html, body { height: 100%; overflow: hidden; }
body { font-family: 'Segoe UI', system-ui, sans-serif; background: var(--bg); color: var(--text); font-size: 14px; }

button { cursor: pointer; border: none; background: none; color: inherit; font: inherit; }
input[type=range] { cursor: pointer; }

/* ── Header ───────────────────────────────────── */
#header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  height: var(--header-h);
  background: var(--bg2);
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 20px;
}

.logo { display: flex; align-items: center; }
.logo-img { height: 38px; width: auto; display: block; mix-blend-mode: multiply; }

.header-actions { display: flex; gap: 8px; }

.btn-primary {
  background: var(--accent); color: #fff; border-radius: var(--radius-sm);
  padding: 7px 16px; font-weight: 600; transition: background var(--trans);
}
.btn-primary:hover { background: var(--accent-h); }
.btn-primary.full-width { width: 100%; padding: 12px; margin-top: 4px; }

.btn-secondary {
  background: var(--bg3); color: var(--text2); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 7px 16px; transition: all var(--trans);
}
.btn-secondary:hover { color: var(--text); border-color: var(--accent); }

/* ── Main layout ──────────────────────────────── */
#main {
  position: relative;
  height: 100vh;
  padding-top: var(--header-h);
}

/* ── 3D Viewer ────────────────────────────────── */
#viewer-wrap {
  position: absolute;
  inset: 0;
  background: var(--bg);
  overflow: hidden;
}

#canvas3d { display: block; width: 100%; height: 100%; }

#canvas-cotas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

#view-controls {
  position: absolute; top: 16px; left: 16px;
  display: flex; flex-direction: column; gap: 4px;
}
.view-btn {
  width: 36px; height: 36px;
  background: rgba(255,255,255,0.82);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  color: var(--text2);
  transition: all var(--trans);
  backdrop-filter: blur(6px);
}
.view-btn:hover, .view-btn.active {
  color: var(--accent); border-color: var(--accent);
  background: rgba(37,99,235,0.10);
}
#btn-cotas.hidden { display: none; }

/* top: var(--header-h) + 16px = 72px — justo debajo del header */
#mode-controls .mode-btn.active {
  background: rgba(37,99,235,0.15) !important;
  border-color: var(--accent) !important;
  color: var(--accent) !important;
}
#mode-controls .mode-btn.active svg { stroke: var(--accent); }

#info-overlay {
  position: absolute; bottom: 52px; left: 50%; transform: translateX(-50%);
  display: flex; gap: 8px;
}
.info-chip {
  background: rgba(255,255,255,0.82);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 4px 12px;
  font-size: 12px;
  color: var(--text2);
  backdrop-filter: blur(6px);
  white-space: nowrap;
}

#drag-hint {
  position: absolute; bottom: 16px; left: 50%; transform: translateX(-50%);
  display: flex; align-items: center; gap: 6px;
  background: rgba(255,255,255,0.82);
  border: 1px solid var(--border);
  border-radius: 20px; padding: 6px 14px;
  font-size: 12px; color: var(--text2);
  backdrop-filter: blur(6px);
  pointer-events: none;
  animation: fadeout 4s 2s forwards;
}
@keyframes fadeout { to { opacity: 0; } }

/* ── Environment controls ─────────────────────── */
#env-controls {
  position: absolute;
  bottom: 16px;
  left: 16px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
/* ── Column context menu ─────────────────────── */
#col-context-menu {
  position: absolute;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 4px 6px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.10);
  z-index: 19;
  user-select: none;
  white-space: nowrap;
}
#col-context-menu.hidden { display: none; }
.col-menu-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  background: none;
  border: none;
  color: var(--text);
  cursor: pointer;
  padding: 6px 11px;
  border-radius: 8px;
  font-size: 13px;
  transition: background 0.15s;
}
.col-menu-btn:hover:not(:disabled) { background: var(--bg3); }
.col-menu-btn:disabled { opacity: 0.28; cursor: default; }
.col-menu-btn-delete { color: #ef4444; }
.col-menu-btn-delete:hover:not(:disabled) { background: rgba(239,68,68,0.10); }
.col-menu-sep {
  width: 1px;
  height: 20px;
  background: var(--border);
  margin: 0 3px;
  flex-shrink: 0;
}
.col-menu-gap-group {
  display: flex;
  align-items: center;
  gap: 0;
}
.col-menu-gap-label {
  font-size: 11px;
  color: var(--text2);
  padding: 0 6px 0 4px;
  flex-shrink: 0;
}
#col-menu-gap-val {
  font-size: 13px;
  color: var(--text);
  min-width: 34px;
  text-align: center;
  flex-shrink: 0;
}
.col-menu-gap-btn {
  padding: 6px 9px;
}

.env-lock-msg.hidden { display: none; }
.env-lock-msg {
  position: absolute;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 7px;
  background: rgba(20, 25, 45, 0.88);
  color: #fff;
  font-size: 12px;
  padding: 9px 14px;
  border-radius: 10px;
  max-width: 320px;
  text-align: center;
  line-height: 1.4;
  pointer-events: none;
  z-index: 200;
  backdrop-filter: blur(6px);
  border: 1px solid rgba(255,255,255,0.12);
}
/* ── Mode toggle (Vision / Edicion) ─────────────────── */
.mode-toggle-group {
  display: flex;
  flex-direction: column;
  gap: 3px;
}
.mode-btn {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 7px 11px;
  background: rgba(255,255,255,0.08);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text2);
  font-size: 12px;
  font-family: inherit;
  cursor: pointer;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
  backdrop-filter: blur(6px);
}
.mode-btn:hover { background: rgba(255,255,255,0.15); color: var(--text); }
.mode-btn.active {
  background: rgba(59,130,246,0.18);
  border-color: rgba(59,130,246,0.5);
  color: #60a5fa;
}
.mode-btn.active svg { stroke: #60a5fa; }

/* ── Door edit panel inside col-context-menu ─────── */
.col-mode-panel { display: flex; align-items: center; justify-content: center; gap: 2px; }
.col-mode-panel.hidden { display: none; }
#col-door-sep { width: 100%; height: 1px; margin: 2px 0; }
.col-menu-info {
  font-size: 11px;
  color: var(--text2);
  padding: 0 8px;
  white-space: nowrap;
  flex-shrink: 0;
}
.door-swatch {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  border: 1px solid var(--border);
  display: inline-block;
  flex-shrink: 0;
}
.col-menu-btn.active {
  background: rgba(37,99,235,0.10);
  color: var(--accent);
  border-radius: 6px;
}

/* ── Door color popup ────────────────────────────── */
#door-color-popup {
  position: absolute;
  bottom: 72px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 10px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.12);
  z-index: 21;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
#door-color-popup.hidden { display: none; }
#door-color-grid {
  display: grid;
  grid-template-columns: repeat(7, 24px);
  gap: 4px;
}
.door-color-swatch {
  width: 24px;
  height: 24px;
  border-radius: 4px;
  border: 2px solid transparent;
  cursor: pointer;
  transition: border-color 0.15s;
}
.door-color-swatch:hover { border-color: var(--accent); }
.door-color-swatch.active { border-color: var(--accent); }
.door-custom-color-row {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--text2);
}
.door-custom-color-row input[type="color"] {
  width: 32px;
  height: 22px;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  padding: 0;
  background: none;
}

.theme-toggle-btn {
  display: flex; align-items: center; gap: 7px;
  padding: 7px 11px;
  background: rgba(255,255,255,0.82); border: 1px solid var(--border);
  border-radius: 8px; color: var(--text2);
  font-size: 12px; font-family: inherit; cursor: pointer;
  transition: background var(--trans), color var(--trans);
  backdrop-filter: blur(6px);
}
.theme-toggle-btn:hover { background: rgba(255,255,255,0.96); color: var(--text); }
.env-separator { height: 1px; background: var(--border); margin: 2px 0; }
.env-btn {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 7px 11px;
  background: rgba(255,255,255,0.82);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text2);
  font-size: 12px;
  font-family: inherit;
  cursor: pointer;
  transition: all var(--trans);
  backdrop-filter: blur(6px);
  white-space: nowrap;
}
.env-btn:hover {
  color: var(--text);
  border-color: var(--accent);
  background: rgba(255,255,255,0.92);
}
.env-btn.active {
  color: var(--accent);
  border-color: var(--accent);
  background: rgba(37,99,235,0.10);
}
.env-btn svg {
  flex-shrink: 0;
  opacity: 0.8;
}
.env-btn.active svg {
  opacity: 1;
}

/* ── Sidebar ──────────────────────────────────── */
/* ── Sidebar toggle button ────────────────────── */
#btn-toggle-panel {
  position: fixed;
  top: calc(var(--header-h) + 12px);
  right: calc(var(--sidebar-w) - 18px);
  z-index: 300;
  width: 28px; height: 28px; border-radius: 50%;
  background: var(--bg2); border: 1px solid var(--border);
  color: var(--text); cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: right 0.28s ease, background var(--trans);
  box-shadow: 0 2px 8px rgba(0,0,0,0.12);
}
#btn-toggle-panel:hover { background: var(--bg3); }
#btn-toggle-panel.panel-hidden { right: 12px; }

#sidebar {
  position: absolute;
  top: var(--header-h); right: 0; bottom: 0;
  width: var(--sidebar-w);
  background: var(--bg2);
  border-left: 1px solid var(--border);
  display: flex; flex-direction: column;
  overflow: hidden;
  z-index: 5;
  transition: transform 0.28s ease;
}
#sidebar.collapsed {
  transform: translateX(100%);
}

#sidebar-inner {
  flex: 1; overflow-y: auto; padding: 16px;
  scrollbar-width: thin; scrollbar-color: var(--border) transparent;
}
#sidebar-inner::-webkit-scrollbar { width: 4px; }
#sidebar-inner::-webkit-scrollbar-thumb { background: #c8d0e0; border-radius: 4px; }

/* ── Tabs ─────────────────────────────────────── */
#tabs {
  display: flex; gap: 2px;
  background: var(--bg3);
  border-radius: var(--radius-sm);
  padding: 3px;
  margin-bottom: 16px;
}
.tab {
  flex: 1; padding: 7px 4px; border-radius: 5px;
  font-size: 12px; font-weight: 500;
  color: var(--text2);
  transition: all var(--trans);
}
.tab:hover { color: var(--text); }
.tab.active { background: var(--accent); color: #fff; }

.tab-content { display: none; }
.tab-content.active { display: block; }

/* ── Sections ─────────────────────────────────── */
.section { margin-bottom: 20px; }
.section-title {
  font-size: 12px; font-weight: 600; text-transform: uppercase;
  letter-spacing: 0.06em; color: var(--text2); margin-bottom: 10px;
}
.section-hint { font-size: 12px; color: var(--text2); margin-bottom: 8px; margin-top: -6px; }

/* ── Counter ──────────────────────────────────── */
.counter-control {
  display: flex; align-items: center; gap: 0;
  background: var(--bg3); border: 1px solid var(--border);
  border-radius: var(--radius-sm); overflow: hidden;
  width: fit-content;
}
.counter-btn {
  width: 36px; height: 36px; font-size: 20px; line-height: 1;
  color: var(--text2); transition: all var(--trans);
}
.counter-btn:hover { background: var(--accent); color: #fff; }
.counter-val {
  width: 48px; text-align: center; font-size: 18px; font-weight: 700;
}

/* Rows-per-col grid */
#rows-per-col { display: flex; gap: 8px; flex-wrap: wrap; }
.col-rows-ctrl {
  display: flex; flex-direction: column; align-items: center; gap: 4px;
}
.col-rows-ctrl label { font-size: 11px; color: var(--text2); }
.col-rows-ctrl .counter-control { transform: scale(0.85); transform-origin: top center; }

/* ── Slider ───────────────────────────────────── */
.slider-wrap { display: flex; align-items: center; gap: 10px; }
.slider-wrap input[type=range] {
  flex: 1; appearance: none;
  height: 4px; background: var(--border); border-radius: 4px; outline: none;
}
.slider-wrap input[type=range]::-webkit-slider-thumb {
  appearance: none; width: 16px; height: 16px; border-radius: 50%;
  background: var(--accent); cursor: pointer;
  box-shadow: 0 0 0 3px rgba(59,110,244,0.25);
  transition: box-shadow var(--trans);
}
.slider-wrap input[type=range]::-webkit-slider-thumb:hover {
  box-shadow: 0 0 0 5px rgba(59,110,244,0.35);
}
.slider-label { font-weight: 600; color: var(--accent); min-width: 48px; text-align: right; }

/* ── Toggle ───────────────────────────────────── */
.toggle-row {
  display: flex; align-items: center; gap: 10px;
  cursor: pointer; padding: 6px 0; user-select: none;
}
.toggle-row input { display: none; }
.toggle-track {
  width: 36px; height: 20px; background: var(--border);
  border-radius: 10px; position: relative; transition: background var(--trans);
  flex-shrink: 0;
}
.toggle-thumb {
  position: absolute; top: 2px; left: 2px;
  width: 16px; height: 16px; background: var(--text2);
  border-radius: 50%; transition: all var(--trans);
}
.toggle-row input:checked ~ .toggle-track { background: var(--accent); }
.toggle-row input:checked ~ .toggle-track .toggle-thumb { left: 18px; background: #fff; }

/* ── Radio ────────────────────────────────────── */
.radio-group { display: flex; flex-direction: column; gap: 6px; }
.radio-opt { display: flex; align-items: center; gap: 8px; cursor: pointer; user-select: none; padding: 2px 0; }
.radio-opt input { display: none; }
.radio-box {
  width: 16px; height: 16px; border-radius: 50%;
  border: 2px solid var(--border); transition: all var(--trans); flex-shrink: 0;
}
.radio-opt input:checked ~ .radio-box {
  border-color: var(--accent); background: var(--accent);
  box-shadow: inset 0 0 0 3px var(--bg2);
}

/* ── Door sizes ───────────────────────────────── */
.door-sizes { display: grid; grid-template-columns: repeat(4, 1fr); gap: 6px; }
.door-size-btn {
  background: var(--bg3); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 8px 4px;
  display: flex; flex-direction: column; align-items: center; gap: 4px;
  transition: all var(--trans); font-size: 11px; color: var(--text2);
}
.door-size-btn small { font-size: 10px; color: var(--text2); }
.door-size-btn:hover { border-color: var(--accent); color: var(--text); }
.door-size-btn.active { border-color: var(--accent); color: var(--accent); background: rgba(59,110,244,0.1); }

.door-icon {
  background: var(--border); border-radius: 3px; width: 22px;
}
.size-s { height: 10px; }
.size-m { height: 18px; }
.size-l { height: 26px; }
.size-xl { height: 36px; }
.door-size-btn.active .door-icon { background: var(--accent); }

/* Row size assign */
#row-size-assign { display: flex; flex-direction: column; gap: 4px; }
.row-assign-row {
  display: flex; align-items: center; gap: 8px;
  font-size: 12px; color: var(--text2);
}
.row-assign-row label { min-width: 52px; }
.row-assign-row select {
  flex: 1; background: var(--bg3); border: 1px solid var(--border);
  color: var(--text); border-radius: var(--radius-sm); padding: 4px 8px;
  font-size: 12px; outline: none;
}
.row-assign-row select:focus { border-color: var(--accent); }

/* ── Colors ───────────────────────────────────── */
.color-grid {
  display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 4px;
}
.color-swatch {
  width: 56px; cursor: pointer; border-radius: 6px; overflow: hidden;
  border: 2px solid transparent; transition: all var(--trans);
  background: rgba(0,0,0,0.03);
}
.swatch-color {
  width: 100%; height: 36px;
}
.swatch-label {
  text-align: center; font-size: 10px; color: var(--text2);
  padding: 2px 0 3px; line-height: 1;
}
.color-swatch:hover { transform: scale(1.06); }
.color-swatch.active { border-color: var(--accent); box-shadow: 0 0 0 2px rgba(37,99,235,0.35); }
.color-swatch.active .swatch-label { color: var(--accent); font-weight: 600; }

.ral-surcharge {
  font-size: 11px; font-weight: 400; color: var(--text2); margin-left: 4px;
}
.ral-custom-row {
  display: flex; align-items: center; gap: 8px; margin-bottom: 8px;
}
.ral-custom-label { font-size: 12px; color: var(--text2); white-space: nowrap; }
.ral-custom-inp {
  width: 70px; padding: 5px 8px; border-radius: var(--radius-sm);
  border: 1px solid var(--border); background: var(--bg3);
  color: var(--text); font-size: 13px;
}
.ral-custom-inp:focus { outline: none; border-color: var(--accent); }
.ral-custom-btn {
  padding: 5px 12px; border-radius: var(--radius-sm); border: none;
  background: var(--accent); color: #fff; font-size: 12px; cursor: pointer;
  transition: opacity var(--trans);
}
.ral-custom-btn:hover { opacity: 0.85; }
.ral-custom-targets {
  display: flex; gap: 16px; margin-bottom: 4px;
}
.ral-target-opt {
  display: flex; align-items: center; gap: 6px; font-size: 12px;
  color: var(--text2); cursor: pointer;
}
.custom-color-row {
  display: flex; gap: 16px;
}
.custom-color-row label {
  display: flex; align-items: center; gap: 8px; font-size: 12px; color: var(--text2);
}
.custom-color-row input[type=color] {
  width: 36px; height: 28px; border: none; background: none; cursor: pointer;
  border-radius: var(--radius-sm); padding: 0;
}

/* ── Tech options ─────────────────────────────── */
.tech-options {
  display: grid; grid-template-columns: 1fr 1fr; gap: 8px;
}
.tech-opt { cursor: pointer; }
.tech-opt input { display: none; }
.tech-card {
  background: var(--bg3); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 12px 8px;
  display: flex; flex-direction: column; align-items: center; gap: 6px;
  font-size: 12px; color: var(--text2);
  transition: all var(--trans);
}
.tech-card svg { color: var(--text2); transition: color var(--trans); }
.tech-opt input:checked ~ .tech-card {
  border-color: var(--accent); color: var(--accent);
  background: rgba(37,99,235,0.08);
}
.tech-opt input:checked ~ .tech-card svg { color: var(--accent); }

/* ── Room panel (interior mode) ──────────────── */
#room-panel { border-bottom: 1px solid var(--border); background: var(--bg3); }
.room-panel-inner { padding: 0 14px; display: flex; flex-direction: column; gap: 0; }

/* "Añade tus medidas" collapsible header */
.room-section-btn {
  display: flex; align-items: center; justify-content: space-between;
  width: 100%; padding: 10px 0; background: none; border: none;
  color: var(--text); font-size: 12px; font-weight: 600; cursor: pointer;
  letter-spacing: 0.01em; transition: color .15s;
}
.room-section-btn:hover { color: var(--accent); }
.room-section-btn.active { color: var(--accent); }
.room-section-chevron { transition: transform .2s; flex-shrink: 0; }
.room-section-btn.active .room-section-chevron { transform: rotate(180deg); }

#room-section-body { display: flex; flex-direction: column; gap: 8px; padding-bottom: 10px; }
#room-section-body.hidden { display: none; }

.room-dims-row { display: flex; gap: 8px; }
.room-dim-label { display: flex; flex-direction: column; gap: 3px; flex: 1; font-size: 11px; color: var(--text2); font-weight: 500; }
.room-dim-input {
  width: 100%; padding: 5px 7px; border: 1px solid var(--border); border-radius: 6px;
  font-size: 13px; background: var(--bg2); color: var(--text); text-align: center; outline: none;
}
.room-dim-input:focus { border-color: var(--accent); }
.wall-selector-row { display: flex; align-items: center; gap: 8px; }
.wall-sel-label { font-size: 11px; color: var(--text2); font-weight: 500; white-space: nowrap; }
.wall-btn-group { display: flex; gap: 4px; flex: 1; }
.wall-btn {
  flex: 1; display: flex; align-items: center; justify-content: center;
  padding: 5px 4px; border: 1px solid var(--border); border-radius: 6px;
  background: var(--bg2); color: var(--text2); font-size: 11px; font-weight: 600;
  cursor: pointer; transition: all .15s;
}
.wall-btn:hover { color: var(--text); border-color: var(--accent); background: rgba(37,99,235,0.06); }
.wall-btn.active { color: var(--accent); border-color: var(--accent); background: rgba(37,99,235,0.12); }

/* ── Summary ──────────────────────────────────── */
#summary {
  border-top: 1px solid var(--border);
  padding: 12px 16px;
  background: var(--bg);
  display: flex; flex-direction: column; gap: 6px;
}
.summary-row {
  display: flex; justify-content: space-between; align-items: center;
  font-size: 12px; color: var(--text2);
}
.summary-row strong { color: var(--text); font-weight: 600; }

/* ── Share modal ──────────────────────────────── */
#share-modal-overlay {
  position: fixed; inset: 0; z-index: 200;
  background: rgba(10,20,50,0.55);
  display: flex; align-items: center; justify-content: center;
  backdrop-filter: blur(4px);
}
#share-modal-overlay.hidden { display: none; }
#share-modal {
  background: var(--bg2); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 32px 28px 24px;
  width: 460px; max-width: 95vw; position: relative;
  text-align: center;
}
#share-modal-close {
  position: absolute; top: 12px; right: 16px;
  font-size: 22px; color: var(--text2); line-height: 1;
}
#share-modal-close:hover { color: var(--text); }
.share-modal-icon {
  width: 56px; height: 56px; border-radius: 50%;
  background: rgba(37,99,235,0.10); border: 1px solid rgba(37,99,235,0.20);
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 16px; color: var(--accent);
}
#share-modal h2 { font-size: 18px; margin-bottom: 8px; }
#share-modal p  { color: var(--text2); font-size: 13px; margin-bottom: 20px; }
.share-url-row {
  display: flex; gap: 8px;
}
#share-url-input {
  flex: 1; background: var(--bg3); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 10px 12px;
  color: var(--text2); font-size: 12px; outline: none;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.share-copied-msg {
  margin-top: 12px; font-size: 12px; color: var(--accent);
  font-weight: 600;
}
.share-copied-msg.hidden { display: none; }

/* Share modal — loading state */
.share-loading {
  display: flex; align-items: center; justify-content: center; gap: 10px;
  padding: 16px 0; color: var(--text2); font-size: 13px;
}
.share-loading.hidden { display: none; }
.share-spinner {
  width: 18px; height: 18px; border-radius: 50%;
  border: 2px solid var(--border);
  border-top-color: var(--accent);
  animation: spin 0.7s linear infinite;
  flex-shrink: 0;
}
@keyframes spin { to { transform: rotate(360deg); } }
.share-fallback-note {
  margin-top: 10px; font-size: 11px; color: var(--text2);
  padding: 7px 10px; background: var(--bg3);
  border-radius: var(--radius-sm); border: 1px solid var(--border);
  text-align: center;
}
.share-fallback-note.hidden { display: none; }

/* ── Saves modal ──────────────────────────────── */
#saves-modal-overlay {
  position: fixed; inset: 0; z-index: 200;
  background: rgba(10,20,50,0.55);
  display: flex; align-items: center; justify-content: center;
  backdrop-filter: blur(4px);
}
#saves-modal-overlay.hidden { display: none; }
#saves-modal {
  background: var(--bg2); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 28px 24px 20px;
  width: 480px; max-width: 96vw; max-height: 85vh;
  position: relative; display: flex; flex-direction: column; gap: 0;
  overflow: hidden;
}
#saves-modal-close {
  position: absolute; top: 12px; right: 16px;
  font-size: 22px; color: var(--text2); line-height: 1;
}
#saves-modal-close:hover { color: var(--text); }
#saves-modal h2 { font-size: 17px; margin-bottom: 16px; }
.saves-form-row {
  display: flex; gap: 8px; margin-bottom: 16px;
}
.saves-name-input {
  flex: 1; background: var(--bg3); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 9px 12px;
  color: var(--text); font: inherit; font-size: 13px; outline: none;
  transition: border-color var(--trans);
}
.saves-name-input:focus { border-color: var(--accent); }
.saves-divider {
  display: flex; align-items: center; gap: 10px;
  margin-bottom: 12px; color: var(--text2); font-size: 11px;
  font-weight: 600; text-transform: uppercase; letter-spacing: 0.06em;
}
.saves-divider::before, .saves-divider::after {
  content: ''; flex: 1; height: 1px; background: var(--border);
}
#saves-list {
  flex: 1; overflow-y: auto; display: flex; flex-direction: column; gap: 6px;
  min-height: 0;
  scrollbar-width: thin; scrollbar-color: var(--border) transparent;
}
#saves-list::-webkit-scrollbar { width: 4px; }
#saves-list::-webkit-scrollbar-thumb { background: #c8d0e0; border-radius: 4px; }
.save-item {
  display: flex; flex-direction: column;
  background: var(--bg3); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 10px 12px;
  gap: 8px; transition: border-color var(--trans);
}
.save-item:hover { border-color: #a0b0cc; }
.save-item-top {
  display: flex; align-items: center; justify-content: space-between; gap: 8px;
}
.save-item-info {
  flex: 1; min-width: 0; display: flex; flex-direction: column; gap: 2px;
}
.save-item-name {
  font-size: 13px; font-weight: 600; color: var(--text);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.save-item-date {
  font-size: 11px; color: var(--text2);
}
.save-item-delete {
  width: 28px; height: 28px; display: flex; align-items: center; justify-content: center;
  border-radius: var(--radius-sm); border: 1px solid transparent;
  color: var(--text2); transition: all var(--trans); flex-shrink: 0;
}
.save-item-delete:hover { color: #ef4444; border-color: #ef4444; background: rgba(239,68,68,0.08); }
.save-item-bottom {
  display: flex; align-items: center; gap: 6px;
}
.save-item-load {
  font-size: 12px; padding: 5px 12px; border-radius: var(--radius-sm);
  background: var(--bg2); border: 1px solid var(--border);
  color: var(--text2); cursor: pointer; white-space: nowrap;
  transition: all var(--trans); flex-shrink: 0;
}
.save-item-load:hover { color: var(--accent); border-color: var(--accent); }
.saves-empty {
  padding: 28px 16px; text-align: center; color: var(--text2);
  font-size: 13px; line-height: 1.6;
}
.saves-empty.hidden { display: none; }

.saves-name-input.input-error {
  border-color: #ef4444;
  animation: shake 0.35s ease;
}
@keyframes shake {
  0%,100% { transform: translateX(0); }
  25%      { transform: translateX(-5px); }
  75%      { transform: translateX(5px); }
}

/* ── Floating PDF button (viewer) ─────────────── */
.pdf-float-btn {
  position: absolute;
  bottom: 16px;
  right: 16px;
  display: flex; align-items: center; gap: 7px;
  padding: 8px 14px;
  background: rgba(255,255,255,0.88);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-size: 13px; font-weight: 500;
  cursor: pointer;
  transition: all var(--trans);
  backdrop-filter: blur(6px);
  box-shadow: 0 2px 12px rgba(0,0,0,0.12);
  z-index: 10;
}
.pdf-float-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(255,255,255,0.96);
}
.pdf-float-btn.hidden { display: none; }

/* ── PDF preview modal ─────────────────────────── */
#pdf-modal-overlay {
  position: fixed; inset: 0; z-index: 500;
  background: rgba(8,12,28,0.72);
  display: flex; align-items: center; justify-content: center;
  backdrop-filter: blur(4px);
}
#pdf-modal-overlay.hidden { display: none; }
#pdf-modal {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  width: min(860px, 96vw);
  height: min(90vh, 960px);
  display: flex; flex-direction: column;
  overflow: hidden;
  box-shadow: 0 24px 80px rgba(0,0,0,0.55);
}
.pdf-modal-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.pdf-modal-title {
  display: flex; align-items: center; gap: 8px;
  font-size: 14px; font-weight: 600; color: var(--text);
}
.pdf-modal-actions {
  display: flex; align-items: center; gap: 8px;
}
.pdf-download-btn {
  display: flex; align-items: center; font-size: 12px; padding: 6px 12px;
}
.pdf-modal-close-btn {
  width: 30px; height: 30px; border-radius: var(--radius-sm);
  font-size: 20px; color: var(--text2); line-height: 1;
  display: flex; align-items: center; justify-content: center;
  transition: all var(--trans);
}
.pdf-modal-close-btn:hover { color: var(--text); background: var(--bg3); }
.pdf-modal-body {
  flex: 1; overflow: hidden;
}
#pdf-iframe {
  width: 100%; height: 100%;
  border: none; display: block;
}

/* ── Save item PDF area ────────────────────────── */
.save-item {
  flex-direction: column;
  gap: 8px;
}
.save-item-top {
  display: flex; align-items: center; justify-content: space-between; gap: 8px;
}
.save-item-bottom {
  display: flex; align-items: center; justify-content: space-between; gap: 6px;
}
.save-item-pdf-area {
  display: flex; align-items: center; gap: 6px; flex: 1;
}
.save-item-upload-label {
  display: flex; align-items: center; gap: 5px;
  font-size: 11px; color: var(--text2);
  cursor: pointer; padding: 4px 8px;
  border: 1px dashed var(--border);
  border-radius: var(--radius-sm);
  transition: all var(--trans);
  white-space: nowrap;
}
.save-item-upload-label:hover { color: var(--accent); border-color: var(--accent); }
.save-item-uploading {
  font-size: 11px; color: var(--text2);
  display: flex; align-items: center; gap: 5px;
}
.save-item-pdf-spinner {
  width: 12px; height: 12px; border-radius: 50%;
  border: 2px solid var(--border); border-top-color: var(--accent);
  animation: spin 0.7s linear infinite; flex-shrink: 0;
}
.save-item-view-pdf {
  font-size: 11px; padding: 4px 10px; border-radius: var(--radius-sm);
  background: rgba(37,99,235,0.1); border: 1px solid rgba(37,99,235,0.3);
  color: var(--accent); cursor: pointer; white-space: nowrap;
  transition: all var(--trans); display: flex; align-items: center; gap: 4px;
}
.save-item-view-pdf:hover { background: rgba(37,99,235,0.2); }
.save-item-remove-pdf {
  font-size: 11px; color: var(--text2); padding: 4px 6px;
  border-radius: var(--radius-sm); border: 1px solid transparent;
  transition: all var(--trans); white-space: nowrap;
}
.save-item-remove-pdf:hover { color: #ef4444; border-color: #ef4444; background: rgba(239,68,68,0.06); }

/* ── Toast notification ────────────────────────── */
#cfg-toast {
  position: fixed; bottom: 24px; left: 50%;
  transform: translateX(-50%) translateY(12px);
  background: rgba(18,22,40,0.92);
  color: #fff; padding: 10px 20px;
  border-radius: 8px; font-size: 13px;
  opacity: 0; pointer-events: none; z-index: 9999;
  transition: opacity 0.2s, transform 0.2s;
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255,255,255,0.1);
  white-space: nowrap;
}
#cfg-toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ── View mode (shared URL) ─────────────────────── */
body.view-mode #sidebar             { display: none; }
body.view-mode #btn-toggle-panel    { display: none; }
body.view-mode .header-actions      { display: none; }
body.view-mode #env-controls        { display: none; }
body.view-mode #mode-controls       { display: none; }
body.view-mode .pdf-float-btn       { display: none; }

.header-view-actions                { display: none; align-items: center; gap: 10px; }
body.view-mode .header-view-actions { display: flex; }
body.view-mode #btn-view-pdf-header { display: flex !important; }
.header-view-actions a              { text-decoration: none; }

/* ── Modal ────────────────────────────────────── */
#modal-overlay {
  position: fixed; inset: 0; z-index: 200;
  background: rgba(10,20,50,0.55);
  display: flex; align-items: center; justify-content: center;
  backdrop-filter: blur(4px);
}
#modal-overlay.hidden { display: none; }
#modal {
  background: var(--bg2); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 28px; width: 440px; max-width: 95vw;
  position: relative;
}
#modal h2 { margin-bottom: 8px; font-size: 18px; }
#modal p { color: var(--text2); margin-bottom: 8px; font-size: 13px; }
#modal pre {
  background: var(--bg3); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 12px;
  font-size: 12px; color: var(--text2);
  white-space: pre-wrap; margin-bottom: 16px;
  max-height: 160px; overflow-y: auto;
}
#modal-close {
  position: absolute; top: 12px; right: 16px;
  font-size: 22px; color: var(--text2); line-height: 1;
}
#modal-close:hover { color: var(--text); }

#quote-form { display: flex; flex-direction: column; gap: 8px; }
#quote-form input, #quote-form textarea {
  background: var(--bg3); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 10px 12px;
  color: var(--text); font: inherit; outline: none;
  transition: border-color var(--trans);
}
#quote-form input:focus, #quote-form textarea:focus { border-color: var(--accent); }
#quote-form textarea { resize: vertical; }

/* ── Series picker ────────────────────────────── */
.series-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}
.series-card {
  background: var(--bg3);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  padding: 10px 8px 8px;
  cursor: pointer;
  transition: all var(--trans);
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}
.series-card:hover { border-color: var(--accent); }
.series-card.active {
  border-color: var(--accent);
  background: rgba(59,110,244,0.12);
}
/* Top-view cross-section previews */
.series-preview {
  border: 2px solid currentColor;
  border-radius: 2px;
  opacity: 0.5;
  margin-bottom: 2px;
}
.series-card.active .series-preview { opacity: 1; color: var(--accent); }
/* Width x Depth proportional boxes (scaled to fit ~60px wide) */
.s300x400 { width: 30px; height: 40px; }
.s400x500 { width: 40px; height: 50px; }
.s500x600 { width: 50px; height: 60px; }
.s500x900 { width: 50px; height: 55px; } /* capped visually */
.series-dims {
  font-size: 13px; font-weight: 700; color: var(--text); line-height: 1.2;
}
.series-label { font-size: 10px; color: var(--text2); text-transform: uppercase; letter-spacing: 0.05em; }
.series-card.active .series-label { color: var(--accent); }

/* ── Fixed value display ──────────────────────── */
.fixed-value-row { display: flex; align-items: baseline; gap: 10px; }
.fixed-value { font-size: 22px; font-weight: 700; color: var(--accent2); }
.fixed-sub { font-size: 11px; color: var(--text2); }

/* ── Column builder ───────────────────────────── */
.cols-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 12px;
}
.btn-add-col {
  background: var(--accent); color: #fff;
  border-radius: var(--radius-sm); padding: 6px 12px;
  font-size: 12px; font-weight: 600; white-space: nowrap;
  transition: background var(--trans); flex-shrink: 0;
}
.btn-add-col:hover { background: var(--accent-h); }
.btn-add-col:disabled { background: var(--border); color: var(--text2); cursor: not-allowed; }

#columns-builder { display: flex; flex-direction: column; gap: 10px; }

/* ── Gap separator (between column cards) ─────── */
.gap-separator {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 2px 0;
}
.gap-sep-line {
  flex: 1;
  height: 1px;
  background: var(--border);
  border-radius: 1px;
}
.gap-sep-label {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: 11px;
  color: var(--text2);
  white-space: nowrap;
  flex-shrink: 0;
}
.gap-sep-input {
  width: 44px; padding: 2px 5px; text-align: center;
  border: 1px solid var(--border); border-radius: 5px;
  font-size: 12px; background: var(--bg2); color: var(--text); outline: none;
}
.gap-sep-input:focus { border-color: var(--accent); }

.col-builder {
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color var(--trans);
}
.col-builder:hover { border-color: #3a4060; }
@keyframes col-flash {
  0%   { box-shadow: 0 0 0 2px var(--accent); border-color: var(--accent); }
  50%  { box-shadow: 0 0 0 4px var(--accent), 0 0 14px rgba(37,99,235,0.4); border-color: var(--accent); }
  100% { box-shadow: none; border-color: var(--border); }
}
.col-builder.col-flash { animation: col-flash 0.7s ease-out forwards; }

.col-header {
  padding: 9px 12px 8px;
  border-bottom: 1px solid var(--border);
}
.col-title-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 5px;
}
.col-num { font-weight: 600; font-size: 13px; }
.col-header-right { display: flex; align-items: center; gap: 6px; }

.spaces-badge {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 2px 8px;
  font-size: 11px; font-weight: 600;
  color: var(--text2);
}
.spaces-badge.full {
  background: rgba(34,211,160,0.1);
  border-color: var(--accent2);
  color: var(--accent2);
}
.spaces-bar {
  height: 3px; background: var(--border);
  border-radius: 3px; overflow: hidden;
}
.spaces-fill {
  height: 100%; background: var(--accent);
  border-radius: 3px; transition: width 0.25s ease;
}
.spaces-fill.full { background: var(--accent2); }

.btn-remove-col {
  font-size: 11px; color: var(--text2);
  padding: 2px 6px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  transition: all var(--trans); white-space: nowrap;
}
.btn-remove-col:hover { color: #ef4444; border-color: #ef4444; }

.btn-collapse-unit {
  width: 22px; height: 22px;
  display: flex; align-items: center; justify-content: center;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text2);
  transition: all var(--trans);
  flex-shrink: 0;
}
.btn-collapse-unit:hover { color: var(--accent); border-color: var(--accent); }

/* Visual column strip */
.col-doors-visual {
  display: flex;
  flex-direction: column-reverse; /* bottom door first visually = reverse */
  margin: 8px 12px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--bg);
}
.col-door-strip {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 7px;
  min-height: 14px;
  border-top: 1px solid rgba(0,0,0,0.25);
  overflow: hidden;
  position: relative;
}
.col-door-strip:first-child { border-top: none; }
.col-door-strip.selected {
  box-shadow: inset 0 0 0 2px var(--accent);
  z-index: 1;
}
.door-strip-label {
  font-size: 10px; font-weight: 600;
  color: rgba(255,255,255,0.92);
  text-shadow: 0 1px 3px rgba(0,0,0,0.6);
  pointer-events: none;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: calc(100% - 26px);
}
.btn-move-door {
  background: rgba(0,0,0,0.35);
  color: rgba(255,255,255,0.55);
  border-radius: 3px;
  border: none; cursor: pointer; padding: 0 3px;
  height: 17px; width: 17px;
  display: flex; align-items: center; justify-content: center;
  transition: all var(--trans); flex-shrink: 0;
}
.btn-move-door:hover:not(:disabled) { background: rgba(0,0,0,0.55); color: #fff; }
.btn-move-door:disabled { color: rgba(255,255,255,0.2); cursor: default; }

.btn-remove-door {
  background: rgba(0,0,0,0.35);
  color: rgba(255,255,255,0.75);
  border-radius: 3px;
  width: 17px; height: 17px;
  font-size: 13px; line-height: 1;
  display: flex; align-items: center; justify-content: center;
  transition: all var(--trans); flex-shrink: 0;
}
.btn-remove-door:hover { background: rgba(239,68,68,0.85); color: #fff; }

.col-door-empty {
  background: repeating-linear-gradient(
    45deg,
    #dde2ee 0px, #dde2ee 5px,
    #eef1f8 5px, #eef1f8 8px
  );
  display: flex; align-items: center; justify-content: center;
  min-height: 14px; border-top: 1px dashed var(--border);
}
.col-door-empty:first-child { border-top: none; }
.col-door-empty span {
  font-size: 10px; color: var(--text2);
  background: rgba(15,17,23,0.85);
  padding: 1px 6px; border-radius: 3px;
  border: 1px solid var(--border);
}

/* Add door section */
.col-add-door {
  padding: 8px 12px 10px;
  border-top: 1px solid var(--border);
}
.add-door-hint {
  font-size: 11px; color: var(--text2);
  margin-bottom: 6px;
}
.door-size-grid {
  display: flex; flex-wrap: wrap; gap: 4px;
}
.dsg-btn {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 5px 7px;
  cursor: pointer;
  transition: all var(--trans);
  display: flex; flex-direction: column; align-items: center;
  min-width: 34px;
}
.dsg-btn:hover { border-color: var(--accent); background: rgba(59,110,244,0.12); }
.dsg-main { font-size: 13px; font-weight: 700; color: var(--text); line-height: 1.2; }
.dsg-sub  { font-size: 9px; color: var(--text2); line-height: 1.2; }

.col-full-msg {
  padding: 8px 12px;
  border-top: 1px solid var(--border);
  font-size: 12px; color: var(--accent2);
  font-weight: 500;
  display: flex; align-items: center; gap: 6px;
}

/* Empty state */
.cols-empty {
  text-align: center; padding: 28px 16px;
  color: var(--text2); font-size: 13px;
  border: 2px dashed var(--border);
  border-radius: var(--radius);
}
.cols-empty svg { opacity: 0.3; margin-bottom: 8px; display: block; margin-left: auto; margin-right: auto; }

/* ── Door screen button ───────────────────────── */
.door-strip-right {
  display: flex; align-items: center; gap: 3px; flex-shrink: 0;
}
.btn-scr {
  background: rgba(0,0,0,0.35);
  color: rgba(255,255,255,0.35);
  border-radius: 3px;
  padding: 2px 4px;
  font-size: 9px; font-weight: 700;
  display: flex; align-items: center; gap: 2px;
  transition: all 0.15s ease;
  height: 17px; min-width: 24px;
  white-space: nowrap;
}
.btn-scr svg { width: 10px; height: 10px; flex-shrink: 0; }
.btn-scr:hover { background: rgba(0,0,0,0.55); color: rgba(255,255,255,0.7); }
.btn-scr.scr-small {
  background: rgba(34,211,160,0.25);
  color: #22d3a0;
  border: 1px solid rgba(34,211,160,0.5);
}
.btn-scr.scr-medium {
  background: rgba(234,179,8,0.25);
  color: #fde047;
  border: 1px solid rgba(234,179,8,0.5);
}
.btn-scr.scr-large {
  background: rgba(59,110,244,0.3);
  color: #93b4fd;
  border: 1px solid rgba(59,110,244,0.5);
}
/* Screen indicator on door strip */
.door-scr-indicator {
  position: absolute;
  left: 50%; top: 50%;
  transform: translate(-50%, -50%);
  width: 60%; max-width: 40px;
  background: rgba(34,211,160,0.2);
  border: 1px solid rgba(34,211,160,0.6);
  border-radius: 2px;
  pointer-events: none;
  display: flex; align-items: center; justify-content: center;
  font-size: 8px; color: rgba(34,211,160,0.9); font-weight: 600;
}

/* ── Unit type badge ──────────────────────────── */
.unit-type-badge {
  font-size: 10px; font-weight: 600;
  padding: 2px 7px; border-radius: 10px;
  text-transform: uppercase; letter-spacing: 0.04em;
  vertical-align: middle; margin-left: 4px;
}
.unit-type-badge.sencillo {
  background: rgba(59,110,244,0.15);
  color: #93b4fd;
  border: 1px solid rgba(59,110,244,0.35);
}
.unit-type-badge.doble {
  background: rgba(34,211,160,0.12);
  color: #22d3a0;
  border: 1px solid rgba(34,211,160,0.35);
}

/* ── Doble unit: column tabs ──────────────────── */
.unit-col-tabs {
  display: flex;
  border-bottom: 1px solid var(--border);
}
.unit-col-tab {
  flex: 1; padding: 7px 8px;
  font-size: 12px; font-weight: 500;
  color: var(--text2);
  border-bottom: 2px solid transparent;
  transition: all var(--trans);
  display: flex; align-items: center; justify-content: center; gap: 6px;
}
.unit-col-tab:hover { color: var(--text); }
.unit-col-tab.active {
  color: var(--text);
  border-bottom-color: var(--accent);
}
.unit-col-tab .spaces-badge { font-size: 10px; padding: 1px 6px; }

/* ── Add-doble button variant ─────────────────── */
.btn-add-doble {
  background: rgba(34,211,160,0.15) !important;
  color: #22d3a0 !important;
  border: 1px solid rgba(34,211,160,0.4);
}
.btn-add-doble:hover {
  background: rgba(34,211,160,0.25) !important;
  border-color: var(--accent2);
}

/* ══════════════════════════════════════════════
   Import 2D modal
   ══════════════════════════════════════════════ */
#modal-import2d {
  position: fixed; inset: 0; z-index: 1000;
  background: rgba(0,0,0,0.7);
  display: flex; align-items: center; justify-content: center;
  backdrop-filter: blur(5px);
}
#modal-import2d.hidden      { display: none; }
#import-preview-area.hidden { display: none; }
#import-result-area.hidden  { display: none; }

#import-modal-box {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 24px 24px 20px;
  width: 500px; max-width: 96vw; max-height: 93vh;
  overflow-y: auto; position: relative;
  box-shadow: 0 28px 72px rgba(0,0,0,0.65);
}

/* Header */
.import-modal-close {
  position: absolute; top: 14px; right: 16px;
  background: none; border: none; color: var(--text2);
  font-size: 22px; cursor: pointer; line-height: 1; transition: color .15s;
}
.import-modal-close:hover { color: var(--text); }

.import-modal-head {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 16px; padding-right: 28px;
}
.import-modal-title {
  font-size: 16px; font-weight: 700; color: var(--text);
  display: flex; align-items: center; gap: 8px; margin: 0;
}
.btn-export-inline {
  font-size: 12px; display: flex; align-items: center; gap: 5px;
  padding: 5px 10px; border-radius: 7px;
  background: var(--bg3); border: 1px solid var(--border);
  color: var(--text2); cursor: pointer; transition: color .15s, border-color .15s;
}
.btn-export-inline:hover { color: var(--text); border-color: var(--accent2); }

/* Tabs */
.import-tabs {
  display: flex; gap: 4px;
  background: var(--bg3); border-radius: 9px; padding: 3px;
  margin-bottom: 18px;
}
.import-tab {
  flex: 1; display: flex; align-items: center; justify-content: center; gap: 6px;
  padding: 7px 10px; border-radius: 7px; border: none;
  background: none; color: var(--text2); font-size: 12px; font-weight: 600;
  cursor: pointer; transition: background .15s, color .15s;
}
.import-tab.active  { background: var(--bg2); color: var(--text); box-shadow: 0 1px 4px rgba(0,0,0,0.3); }
.import-tab:hover:not(.active) { color: var(--text); }

/* Field label */
.import-field-label {
  display: block; font-size: 10px; font-weight: 700;
  color: var(--text2); text-transform: uppercase; letter-spacing: .06em;
  margin-bottom: 6px;
}

/* API Key section */
.import-key-section { margin-bottom: 14px; }
.import-key-row { display: flex; gap: 6px; }
.import-key-row input {
  flex: 1; background: var(--bg3); border: 1px solid var(--border);
  border-radius: 7px; padding: 8px 11px; color: var(--text);
  font-size: 13px; outline: none; font-family: monospace;
}
.import-key-row input:focus { border-color: var(--accent); }
.btn-icon {
  background: var(--bg3); border: 1px solid var(--border);
  border-radius: 7px; padding: 0 10px; cursor: pointer;
  font-size: 14px; transition: border-color .15s;
}
.btn-icon:hover { border-color: var(--accent); }
.import-key-foot { margin-top: 5px; display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.import-hint      { font-size: 11px; color: var(--text2); flex: 1; }
.import-key-status { font-size: 11px; font-weight: 700; }
.import-key-status.ok    { color: var(--accent); }
.import-key-status.error { color: #ef4444; }

/* Model selector */
.import-model-row {
  display: flex; align-items: center; gap: 12px; margin-bottom: 14px;
}
.import-select {
  flex: 1; background: var(--bg3); border: 1px solid var(--border);
  border-radius: 7px; padding: 7px 10px; color: var(--text);
  font-size: 12px; outline: none; cursor: pointer;
}
.import-select:focus { border-color: var(--accent); }

/* Dropzone */
.import-dropzone {
  border: 2px dashed var(--border); border-radius: 10px;
  padding: 24px 16px; text-align: center;
  transition: border-color .2s, background .2s; cursor: default;
  margin-bottom: 12px;
}
.import-dropzone.dz-over { border-color: var(--accent); background: rgba(37,99,235,0.07); }
.import-dropzone-sm { padding: 12px 16px; display: flex; align-items: center; justify-content: center; gap: 6px; flex-wrap: wrap; }
.dz-icon   { display: block; margin: 0 auto 8px; color: var(--text2); }
.dz-icon-sm { color: var(--text2); flex-shrink: 0; }
.dz-label  { font-size: 13px; color: var(--text); margin-bottom: 6px; }
.dz-or     { font-size: 11px; color: var(--text2); display: block; margin-bottom: 8px; }
.dz-hint   { font-size: 11px; color: var(--text2); margin-top: 6px; }
.btn-ghost-inline {
  background: none; border: none; color: var(--accent);
  font-size: 12px; cursor: pointer; padding: 0; text-decoration: underline;
}

/* Image preview */
.import-preview-wrap {
  position: relative; border-radius: 8px; overflow: hidden;
  border: 1px solid var(--border); margin-bottom: 10px;
}
#import-preview-img {
  display: block; width: 100%; max-height: 220px;
  object-fit: contain; background: #080c18;
}
.btn-change-img {
  position: absolute; top: 8px; right: 8px;
  background: rgba(0,0,0,0.7); border: 1px solid var(--border);
  border-radius: 6px; color: var(--text); font-size: 11px;
  padding: 4px 8px; cursor: pointer; transition: background .15s;
}
.btn-change-img:hover { background: rgba(0,0,0,0.9); }

/* Resultado análisis IA */
.res-summary-grid {
  display: grid; grid-template-columns: repeat(4,1fr); gap: 6px; margin-bottom: 8px;
}
.res-item {
  background: var(--bg3); border: 1px solid var(--border);
  border-radius: 8px; padding: 8px 6px; text-align: center;
}
.res-item span   { display: block; font-size: 9px; color: var(--text2); text-transform: uppercase; letter-spacing: .05em; margin-bottom: 3px; }
.res-item strong { font-size: 16px; font-weight: 700; color: var(--accent); }
.res-config-label { font-size: 11px; color: var(--text2); text-align: center; margin-bottom: 8px; }
.res-unit-detail  { background: var(--bg3); border: 1px solid var(--border); border-radius: 8px; padding: 8px 10px; margin-bottom: 8px; }
.res-unit-row     { display: flex; align-items: baseline; gap: 8px; padding: 3px 0; border-bottom: 1px solid var(--border); }
.res-unit-row:last-child { border-bottom: none; }
.res-unit-label   { font-size: 11px; font-weight: 700; color: var(--text); white-space: nowrap; flex-shrink: 0; }
.res-unit-label em { font-style: normal; font-weight: 400; color: var(--accent2); margin-left: 4px; }
.res-unit-doors   { font-size: 11px; color: var(--text2); font-family: monospace; }
.res-cost         { font-size: 10px; color: var(--text2); text-align: right; margin-bottom: 6px; }
.res-apply-btn    { margin-top: 4px; }
.res-scan         { background: #1a1f2e; border: 1px solid #2a3550; border-radius: 6px; padding: 7px 10px; margin-bottom: 8px; display: flex; flex-direction: column; gap: 2px; }
.res-scan-label   { font-size: 10px; color: var(--text2); text-transform: uppercase; letter-spacing: .04em; }
.res-scan-values  { font-size: 11px; color: #7dd3fc; font-family: monospace; }
.res-scan-cols    { font-size: 10px; color: var(--text2); font-family: monospace; }

/* Status */
.import-status {
  min-height: 18px; font-size: 12px; text-align: center;
  margin: 8px 0; transition: color .2s;
}
.import-status.loading { color: var(--accent2); }
.import-status.ok      { color: var(--accent);  }
.import-status.error   { color: #ef4444;         }

/* AI Result */
.ai-result-grid {
  display: grid; grid-template-columns: repeat(3,1fr); gap: 8px; margin-bottom: 6px;
}
.ai-result-item {
  background: var(--bg3); border: 1px solid var(--border);
  border-radius: 8px; padding: 10px; text-align: center;
}
.ai-result-item span   { display: block; font-size: 10px; color: var(--text2); text-transform: uppercase; letter-spacing: .04em; margin-bottom: 3px; }
.ai-result-item strong { font-size: 15px; font-weight: 700; color: var(--accent); }
.ai-result-sub  { font-size: 11px; color: var(--text2); text-align: center; }
.ai-tokens      { color: var(--accent2); margin-left: 8px; }

/* JSON tab */
.import-json-toolbar {
  display: flex; align-items: center; justify-content: space-between; margin-bottom: 6px;
}
.import-json-area {
  width: 100%; height: 150px; resize: vertical;
  background: var(--bg3); border: 1px solid var(--border);
  border-radius: 8px; padding: 10px 12px; color: var(--text);
  font-size: 11.5px; font-family: 'Consolas','Fira Mono',monospace;
  outline: none; line-height: 1.6; margin-bottom: 8px;
}
.import-json-area:focus { border-color: var(--accent); }
.import-format-hint {
  font-size: 11px; color: var(--text2); margin-bottom: 10px; line-height: 1.7;
}
.import-format-hint code {
  background: var(--bg3); border-radius: 3px; padding: 1px 5px;
  font-family: monospace; color: var(--accent2);
}

/* ── Handle (desktop: invisible) ──────────────── */
#sidebar-handle { display: none; }

/* ── Quote button text variants ───────────────── */
.btn-text-mobile { display: none; }

/* ── Mobile backdrop + FAB (desktop: hidden) ──── */
#mobile-backdrop { display: none; }
#btn-mobile-config { display: none; }

/* ═══════════════════════════════════════════════════════════════
   MOBILE — bottom sheet layout  (≤ 768 px)
═══════════════════════════════════════════════════════════════ */
@media (max-width: 768px) {

  /* ── Header ────────────────────────────────────────────────── */
  #header { padding: 0 10px; gap: 8px; }
  .logo-img { height: 28px; }
  .header-actions { gap: 4px; }

  /* Ocultar texto de botones secundarios, mantener iconos */
  #btn-reset  { display: none; }
  #btn-share span, #btn-import2d span, .btn-saves-text { display: none; }
  #btn-share  { padding: 0 10px; min-width: 38px; }
  #btn-import2d { padding: 0 10px; min-width: 38px; }
  #btn-saves  { padding: 0 10px; min-width: 38px; }
  .btn-text-desktop { display: none; }
  .btn-text-mobile  { display: inline; }
  #btn-quote { padding: 0 14px; height: 34px; font-size: 13px; white-space: nowrap; }

  /* ── Viewer: ocupa todo el espacio (sidebar oculto) ──────────── */
  #viewer-wrap { right: 0 !important; }

  /* ── Botón toggle desktop: oculto en móvil ─────────────────── */
  #btn-toggle-panel { display: none !important; }

  /* ── Sidebar → bottom sheet ────────────────────────────────── */
  #sidebar {
    position: fixed;
    top: auto !important;
    bottom: 0; left: 0; right: 0;
    width: 100% !important;
    height: 75dvh;
    height: 75vh; /* fallback Safari antiguo */
    border-left: none;
    border-top: 1px solid var(--border);
    border-radius: 16px 16px 0 0;
    transform: translateY(100%) !important;
    transition: transform 0.32s cubic-bezier(0.32, 0.72, 0, 1);
    z-index: 400;
    overflow: hidden;
    padding-bottom: env(safe-area-inset-bottom, 0px);
  }
  #sidebar.collapsed { transform: translateY(100%) !important; }
  #sidebar.mobile-open { transform: translateY(0) !important; }

  #sidebar-inner {
    height: calc(100% - 24px);
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
  }

  /* ── Handle visible en móvil ────────────────────────────────── */
  #sidebar-handle {
    display: block;
    width: 36px; height: 4px;
    background: var(--border);
    border-radius: 2px;
    margin: 10px auto 4px;
    cursor: pointer;
    flex-shrink: 0;
  }

  /* ── Backdrop ───────────────────────────────────────────────── */
  #mobile-backdrop {
    display: none;
    position: fixed; inset: 0; z-index: 390;
    background: rgba(0, 0, 0, 0.5);
  }
  #mobile-backdrop.active { display: block; }

  /* ── FAB ────────────────────────────────────────────────────── */
  #btn-mobile-config {
    position: fixed;
    bottom: 88px; left: 50%;
    transform: translateX(-50%);
    z-index: 350;
    background: var(--accent);
    color: #fff;
    border: none; border-radius: 24px;
    padding: 12px 22px;
    font-size: 14px; font-weight: 600;
    display: flex; align-items: center; gap: 8px;
    box-shadow: 0 4px 20px rgba(37,99,235,0.4);
    white-space: nowrap;
    cursor: pointer;
  }
  #btn-mobile-config.hidden { display: none; }

  /* En view-mode no se muestra el FAB */
  body.view-mode #btn-mobile-config { display: none !important; }

  /* ── Botones de vista — targets táctiles más grandes ─────────── */
  #view-controls { gap: 6px; }
  .view-btn { width: 44px; height: 44px; }

  /* ── Env controls — más grandes ────────────────────────────── */
  #env-controls { padding-bottom: env(safe-area-inset-bottom, 0px); }
  .env-btn { padding: 8px 12px; font-size: 13px; gap: 6px; }
  .theme-toggle-btn { padding: 7px 10px; font-size: 12px; }

  /* ── Info chips ─────────────────────────────────────────────── */
  #info-overlay { gap: 5px; }
  .info-chip { font-size: 11px; padding: 3px 8px; }

  /* ── Drag hint ──────────────────────────────────────────────── */
  #drag-hint { font-size: 11px; padding: 6px 12px; }

  /* ── Modal importar plano: ocupa pantalla completa ──────────── */
  #import-modal-box {
    width: 96vw;
    max-height: 90dvh;
    max-height: 90vh;
    overflow-y: auto;
  }
}
.btn-ghost {
  background: none; border: 1px solid var(--border); border-radius: 6px;
  color: var(--text2); font-size: 11px; padding: 4px 10px; cursor: pointer;
  transition: border-color .15s, color .15s;
}
.btn-ghost:hover { border-color: var(--accent2); color: var(--text); }