/* 山下良行 · 地形工坊 — visual system
   A single editorial layer loaded after the legacy sheets. It keeps every
   working control and geometry intact while replacing the surface language:
   warm paper, ink, one deep-pine accent, generous type and quiet cards. */

:root{
  --paper:#f4f1ea;
  --paper-2:#ece8df;
  --surface:#ffffff;
  --surface-2:#faf8f3;
  --ink:#171a1c;
  --ink-2:#4c5257;
  --ink-3:#7c8388;
  --line:#e4dfd4;
  --line-2:#d5cfc1;
  --accent:#20473a;
  --accent-ink:#173a2f;
  --accent-soft:#e7ede8;
  --danger:#8c3b2e;
  --radius:14px;
  --radius-sm:10px;
  --font:"Segoe UI Variable Text","Segoe UI","Inter","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-display:"Segoe UI Variable Display","Segoe UI","Inter","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--font);
  font-size:15.5px;
  line-height:1.6;
  letter-spacing:.002em;
  -webkit-font-smoothing:antialiased;
}
button,input,select,textarea{font-family:inherit;font-size:inherit;color:inherit}
button{cursor:pointer;border:0;background:none}
button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,summary:focus-visible,[tabindex]:focus-visible{
  outline:2px solid var(--accent);
  outline-offset:2px;
  border-radius:6px;
}
::selection{background:var(--accent-soft);color:var(--accent-ink)}
h1,h2,h3{font-family:var(--font-display);letter-spacing:-.015em}
p{margin:0}
a{color:var(--accent)}
svg{flex:none}

/* ---------- Header ---------- */
.site-header{
  display:flex;
  align-items:center;
  gap:26px;
  height:64px;
  padding:0 24px;
  background:rgba(255,255,255,.88);
  backdrop-filter:blur(14px) saturate(1.1);
  border-bottom:1px solid var(--line);
  position:sticky;
  top:0;
  z-index:70;
}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:inherit}
.brand-image{width:130px;height:40px;object-fit:contain;display:block}
.brand-divider{width:1px;height:18px;background:var(--line-2)}
.studio-name{font-size:12px;letter-spacing:.12em;color:var(--ink-3);font-weight:500}
.site-header nav{display:flex;align-items:center;gap:4px;margin-left:6px}
.site-header .nav{
  position:relative;
  padding:8px 12px;
  border-radius:9px;
  font-size:14px;
  font-weight:500;
  color:var(--ink-2);
  transition:background .15s ease,color .15s ease;
}
.site-header .nav:hover{background:var(--surface-2);color:var(--ink)}
.site-header .nav.active{color:var(--ink);font-weight:650;background:var(--paper)}
.site-header .nav.active:after{display:none}
#projectCount{
  display:inline-block;
  min-width:18px;
  margin-left:4px;
  padding:0 5px;
  border-radius:999px;
  background:var(--paper-2);
  color:var(--ink-2);
  font-size:11px;
  line-height:18px;
  text-align:center;
  font-variant-numeric:tabular-nums;
}
.header-actions{display:flex;align-items:center;gap:5px;margin-left:auto}
.guide-trigger{
  display:inline-flex;align-items:center;gap:7px;
  padding:8px 11px;border-radius:9px;
  font-size:13.5px;color:var(--ink-2);font-weight:500;
  transition:background .15s ease,color .15s ease;
}
.guide-trigger:hover{background:var(--surface-2);color:var(--ink)}
.guide-trigger svg{width:16px;height:16px}
.account-chip{
  display:inline-flex;align-items:center;gap:7px;
  min-height:38px;padding:0 16px;border-radius:999px;
  background:var(--ink);color:#fff;font-size:13.5px;font-weight:600;
  transition:background .15s ease,transform .15s ease;
}
.account-chip:hover{background:#2b3134}
.account-chip svg{width:15px;height:15px}
.header-actions .quiet{
  width:38px;height:38px;padding:0;
  display:grid;place-items:center;
  border:1px solid var(--line);
  border-radius:999px;
  color:var(--ink-2);
}
.header-actions .quiet span{display:none}
.header-actions .quiet:hover{background:var(--surface-2);color:var(--ink)}

/* ---------- Workbench ---------- */
.workbench{
  display:grid;
  grid-template-columns:408px minmax(0,1fr);
  height:calc(100dvh - 64px);
  min-height:520px;
  overflow:hidden;
  background:var(--paper);
}
.settings{
  display:flex;
  flex-direction:column;
  min-height:0;
  background:var(--surface);
  border-right:1px solid var(--line);
}
.settings .workspace-heading{
  flex:none;
  padding:24px 24px 16px;
  border:0;
}
.settings .workspace-heading .eyebrow{
  display:block;
  font-size:11.5px;
  font-weight:650;
  letter-spacing:.14em;
  color:var(--accent);
  text-transform:none;
}
.settings .workspace-heading h1{
  margin:9px 0 7px;
  font-size:27px;
  font-weight:650;
  letter-spacing:-.025em;
  line-height:1.25;
}
.settings .workspace-heading p{
  font-size:13.5px;
  line-height:1.6;
  color:var(--ink-3);
  max-width:32ch;
}
.workflow-tabs{
  flex:none;
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:2px;
  margin:0 20px 10px;
  padding:3px;
  background:var(--paper-2);
  border-radius:12px;
  border:0;
}
.workflow-tabs button{
  display:flex;
  align-items:center;
  justify-content:center;
  gap:5px;
  min-height:40px;
  padding:0 4px;
  border-radius:9px;
  font-size:13px;
  font-weight:550;
  color:#545b58;
  background:transparent;
  transition:background .16s ease,color .16s ease,box-shadow .16s ease;
}
.workflow-tabs button>span{
  font-size:10.5px;
  font-weight:650;
  letter-spacing:.02em;
  color:#9aa09a;
  font-variant-numeric:tabular-nums;
}
.workflow-tabs button:hover{background:rgba(255,255,255,.6);color:var(--ink)}
.workflow-tabs button[aria-selected="true"]{
  background:var(--ink);
  color:#fff;
  box-shadow:0 2px 6px rgba(23,26,28,.18);
}
.workflow-tabs button[aria-selected="true"]>span{color:rgba(255,255,255,.5)}
.workflow-tabs button:disabled{opacity:.6;cursor:progress}

.settings .panel-scroll{
  flex:1;
  min-height:0;
  overflow-y:auto;
  overscroll-behavior:contain;
  padding:4px 20px 26px;
  scrollbar-width:thin;
  scrollbar-color:#cfc9bc transparent;
}
.settings .panel-scroll::-webkit-scrollbar{width:8px}
.settings .panel-scroll::-webkit-scrollbar-thumb{background:#d8d2c5;border-radius:999px}
.workflow-panel{outline:0;animation:panel-in .22s ease}
@keyframes panel-in{from{opacity:.4;transform:translateY(4px)}to{opacity:1;transform:none}}
.panel-lead{
  margin:8px 2px 14px;
  font-size:14px;
  line-height:1.65;
  color:var(--ink-2);
}
.settings .control-section{
  margin:0 0 12px;
  padding:18px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius);
  box-shadow:0 1px 2px rgba(23,26,28,.03);
}
.settings .control-section:last-child{margin-bottom:4px}
.settings .control-section>h2,
.settings .section-heading h2{
  margin:0;
  font-size:16.5px;
  font-weight:650;
  letter-spacing:-.012em;
  color:var(--ink);
}
.settings .control-section>h2{margin-bottom:15px}
.section-heading{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  margin:0 0 14px;
}
.section-heading .text-button{white-space:nowrap}
.settings .section-heading .text-button{color:var(--accent);font-size:13px}
.elevation-heading .text-button{color:var(--accent);font-size:12.5px;min-height:30px}
.text-button{
  font-size:13px;
  font-weight:600;
  color:var(--accent);
  padding:4px 2px;
  border-radius:6px;
}
.text-button:hover{text-decoration:underline;text-underline-offset:3px}
.section-description{
  margin:0 0 16px;
  font-size:13.5px;
  line-height:1.7;
  color:var(--ink-2);
}
.section-meta{
  flex:none;
  font-size:11.5px;
  font-weight:600;
  letter-spacing:.04em;
  color:var(--accent);
  background:var(--accent-soft);
  border-radius:999px;
  padding:3px 9px;
}
.optional-tag{
  flex:none;
  font-size:11.5px;
  color:var(--ink-3);
  border:1px solid var(--line);
  border-radius:999px;
  padding:2px 8px;
}
.hint{
  margin:10px 0 0;
  font-size:12.5px;
  line-height:1.7;
  color:var(--ink-3);
}

/* ---------- Form controls ---------- */
.settings input:not([type=checkbox]):not([type=range]):not([type=radio]),
.settings select{
  width:100%;
  height:46px;
  padding:0 12px;
  background:#fff;
  border:1px solid var(--line-2);
  border-radius:10px;
  font-size:15px;
  color:var(--ink);
  box-shadow:none;
  transition:border-color .15s ease,box-shadow .15s ease;
}
.settings select{
  appearance:none;
  background-image:url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%237c8388' stroke-width='2.2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  background-repeat:no-repeat;
  background-position:right 12px center;
  padding-right:34px;
}
.settings input:not([type=checkbox]):not([type=range]):not([type=radio]):focus,
.settings select:focus{
  border-color:var(--accent);
  box-shadow:0 0 0 3px rgba(32,71,58,.12);
  outline:0;
}
.settings input::placeholder{color:#9aa09a}
.two-fields{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin:16px 0}
.two-fields>label,
.field{display:flex;flex-wrap:wrap;align-items:baseline;gap:2px 6px;font-size:12.5px;color:var(--ink-3);font-weight:500}
.two-fields>label>span{font-size:11px;color:#9ba19b;font-weight:400;margin-left:auto}
.two-fields>label>input,
.two-fields>label>select{flex:0 0 100%;margin-top:7px}
.field{flex-direction:column;align-items:stretch;gap:7px;margin:14px 0}
.field input{margin-top:0}

/* range */
.settings input[type=range]{
  -webkit-appearance:none;appearance:none;
  width:100%;height:24px;margin:6px 0 4px;
  background:transparent;
  accent-color:var(--accent);
  cursor:pointer;
}
.settings input[type=range]::-webkit-slider-runnable-track{
  height:4px;border-radius:999px;
  background:linear-gradient(90deg,var(--line-2),var(--line-2));
}
.settings input[type=range]::-webkit-slider-thumb{
  -webkit-appearance:none;
  width:18px;height:18px;margin-top:-7px;
  border-radius:50%;
  background:#fff;
  border:2px solid var(--accent);
  box-shadow:0 1px 3px rgba(23,26,28,.2);
}
.settings input[type=range]::-moz-range-track{height:4px;border-radius:999px;background:var(--line-2)}
.settings input[type=range]::-moz-range-thumb{width:16px;height:16px;border-radius:50%;background:#fff;border:2px solid var(--accent)}
.range-label{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  font-size:13.5px;font-weight:550;color:var(--ink);
}
.range-label output{
  background:var(--paper-2);
  color:var(--ink-2);
  font-size:12.5px;
  font-weight:600;
  padding:3px 9px;
  border-radius:999px;
  font-variant-numeric:tabular-nums;
}
.range-label input[type=checkbox]{margin:0}

/* switch */
.settings input.switch{
  -webkit-appearance:none;appearance:none;
  width:44px;height:26px;border-radius:999px;
  background:var(--line-2);position:relative;cursor:pointer;transition:background .16s ease;
}
.settings input.switch:checked{background:var(--accent)}
.settings input.switch:before{
  content:"";position:absolute;top:3px;left:3px;width:20px;height:20px;border-radius:50%;
  background:#fff;box-shadow:0 1px 2px rgba(0,0,0,.2);transition:transform .16s ease;
}
.settings input.switch:checked:before{transform:translateX(18px)}

/* search */
.settings .search{
  display:flex;align-items:center;gap:10px;
  height:48px;padding:0 6px 0 14px;
  background:#fff;
  border:1px solid var(--line-2);
  border-radius:12px;
  transition:border-color .15s ease,box-shadow .15s ease;
}
.settings .search:focus-within{border-color:var(--accent);box-shadow:0 0 0 3px rgba(32,71,58,.12)}
.settings .search>svg{width:17px;height:17px;color:var(--ink-3)}
.settings .search input{
  flex:1;min-width:0;height:44px!important;border:0!important;box-shadow:none!important;
  padding:0!important;background:transparent!important;font-size:15px;
}
.settings .search button{
  width:36px;height:36px;border-radius:9px;display:grid;place-items:center;
  background:var(--ink);color:#fff;
}
.settings .search button svg{width:16px;height:16px}
.settings .search button:hover{background:#2b3134}

.popular{display:flex;flex-wrap:wrap;gap:6px;margin:12px 0 4px}
.popular button{
  padding:6px 12px;border-radius:999px;
  background:var(--surface-2);
  border:1px solid var(--line);
  font-size:12.5px;color:var(--ink-2);
  transition:background .15s ease,color .15s ease,border-color .15s ease;
}
.popular button:hover{background:var(--accent-soft);border-color:#c8d4cb;color:var(--accent-ink)}

/* details / advanced */
.settings details.advanced>summary,
.settings .control-section>details.advanced>summary,
.settings details>summary{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:12px 0;
  font-size:13.5px;font-weight:600;color:var(--ink-2);
  cursor:pointer;list-style:none;
}
.settings details>summary::-webkit-details-marker{display:none}
.settings details>summary>span{
  font-size:11.5px;font-weight:400;color:var(--ink-3);margin-left:auto;margin-right:6px;
}
.settings details>summary:after{
  content:"";width:8px;height:8px;flex:none;
  border-right:1.7px solid var(--ink-3);border-bottom:1.7px solid var(--ink-3);
  transform:rotate(45deg);margin-right:3px;transition:transform .16s ease;
}
.settings details[open]>summary:after{transform:rotate(-135deg)}
.settings details[open]>summary{color:var(--ink)}
.settings details>summary>svg{display:none}
.settings #rangeSettings>summary{font-size:14px;padding:2px 0 10px}
.settings .advanced .advanced{border-top:1px solid var(--line);margin-top:6px}
.settings #loadTerrain{display:none}
.settings #rangeSettings>.range-label{margin-top:4px}
.settings #rangeSettings>input[type=range]{margin-bottom:10px}

/* shapes */
.shape-options{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin:0 0 4px}
.settings .shape-options button{
  display:flex;align-items:center;justify-content:center;gap:7px;
  height:50px;
  border:1px solid var(--line-2);
  border-radius:10px;
  background:#fff;
  font-size:13.5px;font-weight:550;color:var(--ink-2);
  transition:border-color .15s ease,background .15s ease,color .15s ease;
}
.settings .shape-options button svg{width:17px;height:17px}
.settings .shape-options button:hover{border-color:var(--ink-3);color:var(--ink)}
.settings .shape-options button.selected{
  border-color:var(--accent);
  background:var(--accent-soft);
  color:var(--accent-ink);
  box-shadow:inset 0 0 0 1px var(--accent);
}

/* elevation */
.elevation-control{
  margin-top:18px;padding:14px;
  border:1px solid var(--line);
  border-radius:12px;
  background:var(--surface-2);
}
.elevation-heading{display:flex;align-items:center;justify-content:space-between;gap:12px}
.elevation-heading>label{font-size:13.5px;font-weight:600;color:var(--ink)}
.elevation-heading>label>span{font-size:11.5px;font-weight:400;color:var(--ink-3);margin-left:4px}
.elevation-heading .text-button{font-size:12.5px}
.elevation-input-row{display:flex;align-items:center;gap:14px;margin:10px 0 6px}
.elevation-input-row input[type=range]{flex:1;margin:0}
.elevation-number{position:relative;flex:0 0 84px}
.settings .elevation-number input{height:42px!important;font-size:15px;padding-right:26px;font-variant-numeric:tabular-nums}
.elevation-number>span{position:absolute;right:11px;top:50%;transform:translateY(-50%);color:var(--ink-3);font-size:13px}
.elevation-control #elevationHelp{margin:6px 0 0;font-size:12px;line-height:1.65;color:var(--ink-2)}
.elevation-control #elevationHeight{margin:5px 0 0;font-size:12px;font-weight:600;color:var(--accent-ink)}

/* route start */
.track-start-button{
  display:flex;align-items:center;gap:12px;
  width:100%;padding:14px;
  border:1px dashed var(--line-2);
  border-radius:12px;
  background:var(--surface-2);
  text-align:left;
  transition:border-color .15s ease,background .15s ease;
}
.track-start-button:hover{border-color:var(--accent);background:var(--accent-soft)}
.track-start-button>svg:first-child{width:20px;height:20px;color:var(--accent)}
.track-start-button>svg:last-child{width:16px;height:16px;margin-left:auto;color:var(--ink-3)}
.track-start-button span{display:flex;flex-direction:column;gap:2px}
.track-start-button strong{font-size:14px;font-weight:600;color:var(--ink)}
.track-start-button small{font-size:12px;color:var(--ink-3);letter-spacing:.02em}
.route-start .hint{margin-top:10px}

/* buttons */
.primary,.secondary{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:46px;padding:0 18px;
  border-radius:10px;
  font-size:14.5px;font-weight:600;
  transition:background .15s ease,border-color .15s ease,transform .1s ease;
}
.primary{background:var(--ink);color:#fff;border:1px solid var(--ink)}
.primary:hover{background:#2b3134;border-color:#2b3134}
.primary:active{transform:translateY(1px)}
.secondary{background:#fff;color:var(--ink);border:1px solid var(--line-2)}
.secondary:hover{background:var(--surface-2);border-color:var(--ink-3)}
.full{width:100%}
.secondary.full{margin-top:0}
#designTerrain{
  height:50px;
  border:1px solid var(--accent);
  background:var(--accent-soft);
  color:var(--accent-ink);
  font-weight:650;
}
#designTerrain:hover{background:#dbe6dd}
#undoTerrainDesign{margin-top:8px}
#layerPlanStatus{margin-top:12px}
#filamentLegend{margin-top:12px}

/* export */
.export-summary{
  display:flex;flex-direction:column;gap:2px;
  text-align:left;
  padding:16px;
  border:1px solid var(--line);
  border-radius:12px;
  background:var(--surface-2);
  margin-bottom:16px;
}
.export-summary>svg{display:none}
.export-summary:before{content:"模型尺寸";font-size:11.5px;letter-spacing:.04em;color:var(--ink-3)}
.export-summary p#exportDimensions{margin:1px 0 0;font-size:19px;font-weight:650;letter-spacing:-.02em;color:var(--ink);font-variant-numeric:tabular-nums}
.export-summary span{
  display:inline-flex;align-items:center;gap:5px;width:max-content;
  margin-top:7px;padding:3px 9px;border-radius:999px;
  background:#fff;border:1px solid var(--line);
  font-size:11.5px;line-height:1.5;color:var(--ink-2);
}
.export-summary span:before{content:"";width:6px;height:6px;border-radius:50%;background:#7d9a7f}
.format-options{display:flex;flex-direction:column;gap:8px;margin-bottom:14px}
.format-options>label{
  position:relative;
  display:flex;align-items:center;gap:12px;
  padding:13px 14px;
  border:1px solid var(--line-2);
  border-radius:11px;
  background:#fff;
  cursor:pointer;
  transition:border-color .15s ease,background .15s ease,box-shadow .15s ease;
}
.format-options>label:hover{border-color:var(--ink-3)}
.format-options>label:has(input:checked){
  border-color:var(--accent);
  background:var(--accent-soft);
  box-shadow:inset 0 0 0 1px var(--accent);
}
.format-options input[type=radio]{
  -webkit-appearance:none;appearance:none;
  width:18px;height:18px;margin:0;flex:none;
  border:1.7px solid var(--line-2);border-radius:50%;background:#fff;
}
.format-options input[type=radio]:checked{border:5px solid var(--accent)}
.format-options label>span{display:flex;flex-direction:column;gap:2px;min-width:0}
.format-options strong{display:flex;align-items:center;gap:7px;font-size:14.5px;font-weight:600}
.format-options small{font-size:12px;color:var(--ink-3)}
.format-options em{
  font-style:normal;font-size:10.5px;font-weight:700;letter-spacing:.04em;
  color:var(--accent-ink);background:#fff;border:1px solid #c9d5cc;
  border-radius:5px;padding:1px 5px;
}
.format-options label>svg{width:18px;height:18px;margin-left:auto;color:var(--ink-3)}
#snapshotButton{margin-top:12px}
#portableButton{margin-top:8px}

/* trail */
#trailSettings>summary{font-size:14px}
.upload-zone{
  display:flex;flex-direction:column;align-items:center;gap:4px;
  width:100%;padding:16px 12px;margin:2px 0 12px;
  border:1px dashed var(--line-2);border-radius:12px;
  background:var(--surface-2);text-align:center;
}
.upload-zone:hover{border-color:var(--accent);background:var(--accent-soft)}
.upload-zone strong{font-size:13.5px;font-weight:600}
.upload-zone>span:last-child{font-size:11.5px;color:var(--ink-3)}
.upload-icon{position:relative;display:inline-flex;color:var(--accent);margin-bottom:2px}
.upload-icon svg{width:20px;height:20px}
.upload-plus{position:absolute;right:-6px;bottom:-5px;width:12px!important;height:12px!important;background:var(--surface-2);border-radius:50%}
.track-file{
  display:flex;align-items:center;gap:10px;
  padding:11px 12px;margin-bottom:12px;
  border:1px solid var(--line);border-radius:11px;background:var(--surface-2);
}
.track-file>svg{width:17px;height:17px;color:var(--accent)}
.track-file>span{display:flex;flex-direction:column;font-size:13px;font-weight:600}
.track-file small{font-size:11.5px;font-weight:400;color:var(--ink-3)}
.track-file .icon-button{margin-left:auto;width:28px;height:28px;border-radius:8px;display:grid;place-items:center;color:var(--ink-3)}
.track-file .icon-button:hover{background:#efece4;color:var(--ink)}

/* ---------- Dock ---------- */
.settings .export-dock{
  flex:none;
  padding:13px 20px calc(10px + env(safe-area-inset-bottom));
  background:rgba(255,255,255,.96);
  border-top:1px solid var(--line);
  box-shadow:0 -8px 24px rgba(23,26,28,.04);
}
.step-note{margin:0 0 9px;font-size:12.5px;line-height:1.55;color:var(--ink-3)}
.flow-actions{display:flex;align-items:stretch;gap:8px}
.flow-actions .primary{flex:1}
.flow-back{
  width:46px;min-height:46px;flex:none;
  display:grid;place-items:center;
  border:1px solid var(--line-2);border-radius:10px;
  color:var(--ink-2);background:#fff;
}
.flow-back:hover{background:var(--surface-2);color:var(--ink)}
.flow-back svg{width:17px;height:17px}
.print-cta{margin-top:8px;font-size:13px;min-height:40px}
.export-dock .panel-footer{
  display:flex;align-items:center;gap:7px;
  margin-top:10px;padding:0;
  font-size:11.5px;color:var(--ink-3);
}
.status-dot{width:6px;height:6px;border-radius:50%;background:#7d9a7f;flex:none}
#saveButton{
  margin-left:auto;width:30px;height:30px;min-height:30px;padding:0;
  display:grid;place-items:center;border-radius:8px;color:var(--ink-3);
}
#saveButton:hover{background:var(--surface-2);color:var(--ink)}
#saveButton svg{width:15px;height:15px}

/* ---------- Preview ---------- */
.preview-area{
  display:flex;flex-direction:column;min-width:0;min-height:0;
  background:var(--paper);
}
.preview-header{
  flex:none;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  height:64px;padding:0 24px;
  background:var(--surface);
  border-bottom:1px solid var(--line);
}
.preview-title{display:flex;align-items:baseline;gap:10px;min-width:0}
.small-dot{width:7px;height:7px;border-radius:50%;background:var(--accent);align-self:center}
.preview-header strong{font-size:16.5px;font-weight:650;letter-spacing:-.01em;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.preview-header #locationSubtitle{font-size:13px;color:var(--ink-3);white-space:nowrap}
.view-tabs{
  display:inline-flex;gap:2px;padding:3px;
  background:var(--paper-2);border-radius:11px;flex:none;
}
.view-tabs button{
  display:inline-flex;align-items:center;gap:6px;
  height:34px;padding:0 15px;border-radius:8px;
  font-size:13.5px;font-weight:550;color:var(--ink-2);
}
.view-tabs button svg{width:15px;height:15px}
.view-tabs button:hover{color:var(--ink)}
.view-tabs button.selected{background:#fff;color:var(--ink);box-shadow:0 1px 2px rgba(23,26,28,.12)}

#viewport{
  position:relative;flex:1;min-height:220px;overflow:hidden;
  background:radial-gradient(120% 90% at 50% 28%,#fbfaf5 0%,#f0ece3 55%,#e8e3d8 100%);
}
#canvasHost{position:absolute;inset:0}
#canvasHost canvas{display:block;width:100%;height:100%}
.model-badge{
  position:absolute;top:20px;left:24px;z-index:3;
  display:inline-flex;align-items:center;gap:7px;
  padding:7px 13px;border-radius:999px;
  background:rgba(255,255,255,.8);
  border:1px solid rgba(213,207,193,.9);
  backdrop-filter:blur(8px);
  font-size:12px;color:var(--ink-2);
}
.model-badge svg{width:14px;height:14px;color:var(--accent)}
.viewer-tools{
  position:absolute;top:20px;right:20px;z-index:4;
  display:flex;flex-direction:column;gap:3px;padding:4px;
  background:rgba(255,255,255,.9);
  border:1px solid rgba(213,207,193,.95);
  border-radius:12px;
  box-shadow:0 6px 20px rgba(23,26,28,.08);
  backdrop-filter:blur(8px);
}
.viewer-tools button{
  width:36px;height:36px;padding:0;border-radius:9px;
  display:grid;place-items:center;color:var(--ink-2);background:none;border:0;
}
.viewer-tools button:hover{background:var(--surface-2);color:var(--ink)}
.viewer-tools button[aria-pressed="true"]{background:var(--accent-soft);color:var(--accent-ink)}
.viewer-tools button svg{width:16px;height:16px}
.orbit-hint{
  position:absolute;right:20px;bottom:16px;z-index:3;
  display:inline-flex;align-items:center;gap:6px;
  padding:6px 11px;border-radius:999px;
  background:rgba(255,255,255,.72);
  font-size:11.5px;color:var(--ink-3);
  backdrop-filter:blur(6px);
}
.orbit-hint svg{width:13px;height:13px}
.model-axis{
  position:absolute;left:24px;bottom:20px;z-index:3;
  display:flex;flex-direction:column;align-items:center;gap:2px;
  color:var(--ink-3);font-size:10.5px;letter-spacing:.1em;
}
.model-axis svg{width:20px;height:20px;transform:rotate(-12deg)}
.loading-overlay{
  position:absolute;inset:0;z-index:9;
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;
  background:rgba(244,241,234,.86);backdrop-filter:blur(3px);
}
.loading-overlay[hidden]{display:none}
.loading-overlay strong{font-size:14.5px;font-weight:600}
.loading-overlay p{font-size:12.5px;color:var(--ink-3)}
.spinner{
  width:26px;height:26px;border-radius:50%;
  border:2.5px solid var(--line-2);border-top-color:var(--accent);
  animation:spin .9s linear infinite;
}
@keyframes spin{to{transform:rotate(360deg)}}

/* stats */
.terrain-stats{
  flex:none;
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr)) 168px;
  min-height:88px;
  align-items:stretch;
  height:88px;
  padding:0 24px;
  background:var(--surface);
  border-top:1px solid var(--line);
}
.terrain-stats>div:not(.profile-wrap){
  display:flex;flex-direction:column;justify-content:center;gap:2px;
  min-width:0;padding:0 18px;
  border-left:1px solid var(--line);
}
.terrain-stats>div:first-child{border-left:0;padding-left:0}
.terrain-stats>div>span{font-size:12px;color:var(--ink-3);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.terrain-stats>div>span em{font-style:normal;color:var(--accent);font-size:11px;margin-left:4px}
.terrain-stats strong{
  margin:0;
  font-size:20px;font-weight:650;letter-spacing:-.02em;color:var(--ink);
  font-variant-numeric:tabular-nums;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.terrain-stats strong small{font-size:11px;font-weight:500;color:var(--ink-3);margin-left:2px;letter-spacing:0}
.profile-wrap{
  display:flex;flex-direction:column;justify-content:center;gap:2px;
  border-left:1px solid var(--line);padding-left:18px;
}
.profile-wrap canvas{width:100%;height:44px;display:block}
.profile-wrap span{font-size:11px;color:var(--ink-3)}

/* ---------- Map overlays ---------- */
.map-inset{position:absolute;inset:0;z-index:2;overflow:hidden}
.map-inset-header{
  position:absolute;top:20px;left:24px;z-index:5;
  display:flex;align-items:center;gap:10px;
  padding:6px 6px 6px 13px;
  background:rgba(255,255,255,.94);
  border:1px solid var(--line);
  border-radius:12px;
  box-shadow:0 6px 20px rgba(23,26,28,.08);
}
.map-inset-header>span{display:inline-flex;align-items:center;gap:7px;font-size:13px;font-weight:600}
.map-inset-header>span svg{width:15px;height:15px;color:var(--accent)}
.map-inset-header>div{display:inline-flex;gap:2px;padding:2px;background:var(--paper-2);border-radius:8px}
.map-inset-header button{height:30px;padding:0 11px;border-radius:7px;font-size:12.5px;font-weight:550;color:var(--ink-2)}
.map-inset-header button.selected{background:#fff;color:var(--ink);box-shadow:0 1px 2px rgba(23,26,28,.12)}
.map-selection-toolbar{
  position:absolute;left:24px!important;right:24px!important;bottom:40px!important;z-index:5;
  display:flex;align-items:center;gap:10px;
  padding:10px 10px 10px 16px!important;
  background:rgba(255,255,255,.94);
  border:1px solid var(--line)!important;
  border-radius:12px!important;
  box-shadow:0 10px 30px rgba(23,26,28,.1)!important;
}
.map-selection-toolbar span{font-size:12.5px!important;color:var(--ink-2)}
.map-selection-toolbar button{
  margin-left:auto;height:36px;padding:0 14px;border-radius:8px;
  font-size:12.5px;font-weight:600;background:var(--surface-2);color:var(--ink-2);border:1px solid var(--line);
}
.map-selection-toolbar #fitSelection{margin-left:auto}
.map-selection-toolbar button:hover{background:var(--accent-soft);color:var(--accent-ink);border-color:#c9d5cc}
.map-coords{
  position:absolute;left:24px;bottom:12px;z-index:5;
  font-size:11.5px;color:var(--ink-2);
  background:rgba(255,255,255,.8);
  padding:4px 9px;border-radius:999px;
  font-variant-numeric:tabular-nums;
}
.map-lakes{
  position:absolute;top:82px;left:24px;z-index:5;
  width:246px;padding:14px;
  background:rgba(255,255,255,.95);
  border:1px solid var(--line)!important;
  border-radius:13px!important;
  box-shadow:0 10px 30px rgba(23,26,28,.1)!important;
  backdrop-filter:blur(8px);
}
.map-lakes .lake-heading{display:flex;align-items:center;gap:7px}
.map-lakes .lake-heading svg{width:15px;height:15px;color:var(--accent)}
.map-lakes .lake-heading strong{font-size:13.5px}
.map-lakes .lake-heading button{margin-left:auto;width:26px;height:26px;border-radius:7px;display:grid;place-items:center;color:var(--ink-3)}
.map-lakes .lake-heading button:hover{background:var(--surface-2)}
.map-lakes p{font-size:12px;line-height:1.6;color:var(--ink-2);margin:8px 0 0}
.map-lakes summary{font-size:12px;font-weight:600;color:var(--ink-2);padding:8px 0 2px;cursor:pointer}
#lakeCoverage,#pixelStatus{color:var(--ink-3)}
#smallLakes{height:32px;padding:0 10px;border-radius:8px;border:1px solid var(--line);background:var(--surface-2);font-size:12px;margin-top:8px}
#lakeSource{display:inline-block;margin-top:8px;font-size:11.5px;color:var(--ink-3)}
.map-notice{font-size:12px}

/* ---------- Assistant & palette ---------- */
#paletteAssistant{margin-top:6px}
.assistant-compose>label,.assistant-compose-heading{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  margin:20px 0 9px;
  font-size:13.5px;font-weight:600;color:var(--ink);
}
.assistant-input{
  display:flex;align-items:flex-end;gap:8px;
  padding:10px;
  border:1px solid var(--line-2);
  border-radius:12px;background:#fff;
}
.assistant-input:focus-within{border-color:var(--accent);box-shadow:0 0 0 3px rgba(32,71,58,.12)}
.assistant-input textarea{
  flex:1;min-height:72px;height:72px;border:0;outline:0;resize:none;
  font-size:14.5px;line-height:1.7;color:var(--ink);background:transparent;padding:0;
}
.assistant-input>button{
  width:34px;height:34px;border-radius:9px;flex:none;
  background:var(--ink);color:#fff;display:grid;place-items:center;
}
.assistant-input>button svg{width:16px;height:16px}
.assistant-suggestions{display:flex;flex-wrap:wrap;gap:6px;margin:10px 0 0}
.assistant-suggestions button{
  min-height:30px;padding:5px 11px;
  border:1px solid var(--line);border-radius:999px;
  background:var(--surface-2);color:var(--ink-2);
  font-size:12.5px;font-weight:500;
}
.assistant-suggestions button:hover{background:var(--accent-soft);color:var(--accent-ink);border-color:#c9d5cc}
.assistant-messages{margin-top:4px}
.assistant-messages .chat-bubble{
  font-size:13.5px;line-height:1.8;
  padding:12px 14px;margin-top:12px;
  border:1px solid var(--line);border-radius:12px;
  background:var(--surface-2);color:var(--ink-2);
  white-space:pre-wrap;
}
.assistant-messages .chat-bubble.user{
  background:var(--accent);color:#fff;border-color:var(--accent);
  border-bottom-right-radius:4px;margin-left:28px;
}
.assistant-messages .chat-bubble.assistant{border-top-left-radius:4px;margin-right:16px}
.assistant-messages .chat-bubble.error{background:#f7ece8;border-color:#e8d2c9;color:var(--danger)}
.assistant-note{font-size:12px;color:var(--ink-3);display:block;margin-top:6px}
.design-actions{display:flex;align-items:center;gap:12px;margin-top:8px}
.design-undo{font-size:12.5px;color:var(--accent);min-height:30px}

/* palette history */
.palette-history-toggle{display:inline-flex;align-items:center;gap:4px;font-size:12.5px;font-weight:500;color:var(--accent);margin:0;padding:2px 0;min-height:24px}
.palette-history-toggle:hover{text-decoration:underline;text-underline-offset:3px}
.palette-history{
  margin-top:10px;padding:12px;
  border:1px solid var(--line);border-radius:12px;background:var(--surface-2);
}
.palette-history-heading{display:flex;align-items:center;justify-content:space-between;font-size:13px}
.palette-history-heading button{font-size:12px;color:var(--ink-3)}
.palette-history-list{list-style:none;margin:8px 0 0;padding:0;display:flex;flex-direction:column;gap:6px}
.palette-version{border:1px solid var(--line);border-radius:9px;background:#fff;padding:9px 10px}
.palette-version-top{display:flex;justify-content:space-between;font-size:12px;color:var(--ink-3)}
.palette-version-body{font-size:12.5px;color:var(--ink-2);margin-top:3px}
.palette-history-note{font-size:11.5px;color:var(--ink-3);margin-top:8px;line-height:1.6}

/* ---------- Dialogs ---------- */
dialog{
  border:1px solid var(--line);
  border-radius:18px;
  background:var(--surface);
  color:var(--ink);
  padding:0;
  box-shadow:0 30px 80px rgba(20,26,22,.28);
  max-height:calc(100dvh - 40px);
}
dialog::backdrop{background:rgba(21,28,24,.42);backdrop-filter:blur(3px)}
.icon-button{
  display:grid;place-items:center;width:34px;height:34px;border-radius:9px;
  color:var(--ink-3);background:none;
}
.icon-button:hover{background:var(--surface-2);color:var(--ink)}
.icon-button svg{width:17px;height:17px}

#welcomeDialog{
  width:min(620px,calc(100vw - 32px));
  padding:30px 34px 26px;
}
.welcome-top{display:flex;align-items:center;justify-content:space-between;gap:16px}
.welcome-brand{height:40px;width:auto;object-fit:contain}
.guide-eyebrow{
  margin:24px 0 7px;
  font-size:11.5px;font-weight:650;letter-spacing:.16em;
  color:var(--accent);text-transform:none;
}
#welcomeTitle{margin:0 0 12px;font-size:36px;line-height:1.15;font-weight:650;letter-spacing:-.03em}
#welcomeText{margin:0 0 22px;font-size:15px;line-height:1.8;color:var(--ink-2);max-width:44ch}
.welcome-steps{
  display:grid;grid-template-columns:1fr 1fr;gap:8px;
  list-style:none;padding:0;margin:0 0 22px;
}
.welcome-steps li{
  display:flex;align-items:flex-start;gap:11px;
  padding:13px 14px;
  background:var(--surface-2);
  border:1px solid var(--line);
  border-radius:12px;
}
.welcome-steps b{
  font-size:11px;font-weight:700;color:var(--accent);
  letter-spacing:.04em;padding-top:2px;font-variant-numeric:tabular-nums;
}
.welcome-steps li>span{font-size:14px;font-weight:600;line-height:1.4}
.welcome-steps small{display:block;margin-top:2px;font-size:12px;font-weight:400;color:var(--ink-3);line-height:1.5}
.welcome-actions{display:flex;align-items:center;gap:14px}
.welcome-actions .primary{flex:1;height:50px;font-size:15px;justify-content:space-between;padding:0 18px}
.welcome-actions #welcomeSkip{font-size:13.5px;color:var(--ink-3);padding:8px 4px;white-space:nowrap}
.welcome-actions #welcomeSkip:hover{color:var(--ink)}
.guide-footnote{margin:14px 0 0;font-size:12px;color:var(--ink-3)}

#tourDialog{
  position:fixed;inset:auto 28px 104px auto;margin:0;
  width:392px;max-width:calc(100vw - 32px);
  padding:22px 24px 20px;
  border-radius:18px;
}
#tourDialog::backdrop{background:rgba(21,28,24,.16);backdrop-filter:none}
.tour-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:10px}
.tour-top>span{font-size:11.5px;font-weight:700;letter-spacing:.14em;color:var(--accent)}
.tour-top button{display:inline-flex;align-items:center;gap:4px;font-size:12px;color:var(--ink-3);padding:4px 6px;border-radius:7px}
.tour-top button:hover{background:var(--surface-2);color:var(--ink)}
.tour-top svg{width:13px;height:13px}
#tourDialog h2{margin:0 0 9px;font-size:21px;font-weight:650;letter-spacing:-.015em}
#tourDialog p{margin:0;font-size:14px;line-height:1.8;color:var(--ink-2)}
.tour-tip{
  margin:14px 0 0;padding:11px 13px;
  background:var(--accent-soft);border-radius:10px;
  font-size:13px;line-height:1.7;color:var(--accent-ink);
}
.tour-actions{display:flex;gap:8px;margin-top:18px}
.tour-actions button{flex:1;min-height:44px;font-size:14px}
#tourNext{flex:1.5}
.tour-actions button:disabled{opacity:.42;cursor:default}
.tour-actions button:disabled:hover{background:#fff;border-color:var(--line-2)}

#helpDialog{width:min(680px,calc(100vw - 32px));padding:28px 32px 30px;overflow:auto}
.dialog-top{display:flex;align-items:center;justify-content:space-between;gap:16px}
#helpDialog h2{margin:8px 0 14px;font-size:28px;font-weight:650;letter-spacing:-.02em}
#helpDialog p{font-size:14px;line-height:1.85;color:var(--ink-2);margin:0 0 14px}
#helpDialog h3{margin:22px 0 8px;font-size:15px;font-weight:650}
#helpDialog a{font-size:13.5px}

.commerce-dialog{width:min(560px,calc(100vw - 32px));padding:24px 26px}
.commerce-dialog h2{margin:0 0 12px;font-size:23px;font-weight:650}
.commerce-dialog p{font-size:13.5px;line-height:1.8;color:var(--ink-2)}
.commerce-notice{
  margin:14px 0;padding:11px 13px;
  border:1px solid var(--line);border-radius:10px;
  background:var(--surface-2);
  font-size:13px;color:var(--ink-2);
}

/* toast */
.toast{
  position:fixed;left:50%;bottom:28px;transform:translateX(-50%);
  z-index:200;
  max-width:min(560px,calc(100vw - 32px));
  padding:11px 16px;
  border-radius:11px;
  background:var(--ink);color:#fff;
  font-size:13.5px;line-height:1.6;
  box-shadow:0 12px 40px rgba(0,0,0,.28);
}
.toast[hidden]{display:none}

/* guide highlight */
.guide-highlight{position:relative;z-index:2;outline:2px solid var(--accent);outline-offset:5px;border-radius:16px}

/* ---------- Collection views ---------- */
.collection-view{padding:56px 40px 72px;max-width:1280px;margin:0 auto}
.collection-heading{max-width:640px;margin-bottom:32px}
.collection-heading .eyebrow{
  display:block;font-size:11.5px;font-weight:650;letter-spacing:.16em;color:var(--accent);
}
.collection-heading h1{margin:10px 0 12px;font-size:40px;font-weight:650;letter-spacing:-.03em;line-height:1.15}
.collection-heading p{font-size:15px;line-height:1.8;color:var(--ink-2)}
.collection-heading .secondary{margin-top:18px}
.gallery-grid,.project-grid{
  display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:16px;
}
.place-card,.project-card{
  border:1px solid var(--line);border-radius:16px;background:#fff;overflow:hidden;
  transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;
}
.place-card:hover,.project-card:hover{transform:translateY(-2px);box-shadow:0 16px 40px rgba(23,26,28,.08);border-color:var(--line-2)}
.place-card small{display:none}
.place-card canvas{display:block;width:100%;height:auto}
.place-card h2,.project-card h2{margin:0;font-size:19px;font-weight:650;letter-spacing:-.01em}
.place-card p,.project-card p{margin:6px 0 0;font-size:12.5px;line-height:1.65;color:var(--ink-2)}
.place-card>div,.project-card>div{padding:16px}
.empty-state{
  grid-column:1/-1;padding:48px 24px;text-align:center;
  border:1px dashed var(--line-2);border-radius:16px;
  color:var(--ink-3);font-size:14px;background:var(--surface-2);
}

footer{
  display:flex;align-items:center;gap:20px;
  padding:20px 24px;
  border-top:1px solid var(--line);
  background:var(--surface);
  font-size:12.5px;color:var(--ink-3);
}
.footer-brand{display:flex;align-items:center;gap:9px;color:var(--ink-2);font-weight:600;font-size:13px}
.footer-brand span{font-weight:400;color:var(--ink-3);margin-left:4px}
footer>span{margin:0 auto 0 12px}
footer button{font-size:12.5px;color:var(--ink-2);display:inline-flex;align-items:center;gap:5px}
footer button:hover{color:var(--accent)}
footer button svg{width:13px;height:13px}

.visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap;border:0}

/* ---------- Responsive ---------- */
@media (min-width:1680px){
  .workbench{grid-template-columns:440px minmax(0,1fr)}
  .settings .workspace-heading{padding:28px 28px 18px}
  .settings .panel-scroll{padding-inline:24px}
  .workflow-tabs{margin-inline:24px}
  .settings .export-dock{padding-inline:24px}
}
@media (max-width:1180px){
  .workbench{grid-template-columns:366px minmax(0,1fr)}
  .terrain-stats{grid-template-columns:repeat(4,minmax(0,1fr));height:78px}
  .terrain-stats>div{padding-inline:12px}
  .terrain-stats strong{font-size:17px}
  .profile-wrap{display:none}
  .settings .workspace-heading{padding:20px 20px 14px}
  .workflow-tabs{margin-inline:16px}
  .settings .panel-scroll{padding-inline:16px}
  .settings .export-dock{padding-inline:16px}
}
@media (max-width:900px){
  .site-header{gap:14px;padding:0 16px}
  .brand-image{width:112px;height:36px}
  .site-header nav{gap:0}
  .site-header .nav{padding:7px 9px;font-size:13.5px}
  .guide-trigger span{display:none}
  .guide-trigger{padding:8px;border:1px solid var(--line)}
  .account-chip{padding:0 12px}
  .workbench{grid-template-columns:340px minmax(0,1fr)}
  .terrain-stats{grid-template-columns:repeat(2,minmax(0,1fr));height:auto;padding:10px 16px}
  .terrain-stats>div{padding:8px 12px;border-left:1px solid var(--line)}
  .terrain-stats>div:nth-child(odd){border-left:0;padding-left:0}
  .profile-wrap{display:none}
}
@media (max-width:760px){
  body{overflow:hidden}
  .site-header{height:56px;gap:8px;padding:0 12px}
  .brand-image{width:96px;height:32px}
  .brand-divider{display:none}
  .studio-name{display:none}
  .site-header nav{margin-left:auto;gap:0}
  .site-header .nav{font-size:12.5px;padding:6px 7px}
  .site-header .nav[data-view="gallery"]{display:none}
  .site-header .nav[data-view="projects"]{font-size:0;width:36px;text-align:center}
  .site-header .nav[data-view="projects"]:before{content:"项目";font-size:12.5px}
  #projectCount{display:none}
  .header-actions{gap:2px;margin-left:0}
  .account-chip{min-height:32px;font-size:12px;padding:0 10px}
  .account-chip svg{display:none}
  .header-actions .quiet{width:32px;height:32px}

  .workbench{
    display:flex;flex-direction:column;
    height:calc(100dvh - 56px);min-height:0;overflow:hidden;
  }
  .preview-area{order:-1;height:40dvh;min-height:300px;flex:none;border-bottom:1px solid var(--line)}
  .preview-header{height:46px;padding:0 14px}
  .preview-header strong{font-size:14px}
  .preview-header #locationSubtitle{display:none}
  .view-tabs{padding:2px}
  .view-tabs button{height:30px;padding:0 12px;font-size:12.5px}
  .view-tabs button svg{display:none}
  .model-badge{top:12px;left:14px;padding:5px 10px;font-size:11px}
  .viewer-tools{top:10px;right:12px;gap:0;padding:3px}
  .viewer-tools button{width:29px;height:29px}
  .viewer-tools button svg{width:14px;height:14px}
  .orbit-hint{display:none}
  .model-axis{display:none}
  .terrain-stats{height:50px;min-height:50px;grid-template-columns:repeat(4,minmax(0,1fr));padding:0 12px}
  .terrain-stats>div{padding:0 7px;border-left:1px solid var(--line);gap:0}
  .terrain-stats>div:first-child{padding-left:0;border-left:0}
  .terrain-stats>div>span{font-size:10px;line-height:1.35}
  .terrain-stats>div>span em{display:none}
  .terrain-stats strong{font-size:11.5px;line-height:1.35;letter-spacing:-.045em}
  .terrain-stats strong small{font-size:9px}
  .profile-wrap{display:none}

  .settings{flex:1;min-height:0;border:0}
  .settings .workspace-heading{display:none}
  .workflow-tabs{margin:8px 12px 6px;padding:3px;border-radius:10px}
  .workflow-tabs button{min-height:38px;font-size:12.5px;gap:4px}
  .workflow-tabs button>span{font-size:9.5px}
  .settings .panel-scroll{padding:2px 12px 10px}
  .panel-lead{display:none}
  .settings .control-section{padding:15px;border-radius:13px}
  .settings .control-section h2,.section-heading h2{font-size:15.5px}
  .settings .export-dock{padding:10px 12px calc(8px + env(safe-area-inset-bottom))}
  .step-note{display:none}
  .flow-actions .primary{min-height:46px}
  .panel-footer{margin-top:8px;font-size:11px}
  .map-selection-toolbar{left:12px!important;right:12px!important;bottom:12px!important;padding:6px 6px 6px 11px!important}
  .map-selection-toolbar span{display:block;font-size:11px!important;line-height:1.4;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
  .map-selection-toolbar button{height:32px;padding:0 11px;font-size:12px}
  .map-inset-header{top:10px;left:12px;padding:4px 4px 4px 10px}
  .map-inset-header>span{font-size:12px}
  .map-lakes{top:54px;left:12px;width:188px;padding:9px 10px;max-height:60%;overflow:auto}
  .map-lakes p{font-size:11.5px}
  .map-lakes #lakeNotice{display:none}
  .map-lakes details>summary{font-size:11.5px;padding:6px 0 0}
  .map-coords{display:none}

  #welcomeDialog{padding:24px 20px 22px;border-radius:16px}
  .welcome-brand{height:32px}
  #welcomeTitle{font-size:28px}
  #welcomeText{font-size:14px;margin-bottom:18px}
  .welcome-steps{grid-template-columns:1fr;gap:6px}
  .welcome-steps li{padding:10px 12px}
  .welcome-actions{flex-direction:column;align-items:stretch;gap:8px}
  .welcome-actions .primary{height:48px}
  .welcome-actions #welcomeSkip{align-self:center}
  .guide-eyebrow{margin-top:16px}

  #tourDialog{left:12px;right:12px;bottom:12px;width:auto;max-width:none;padding:18px 18px 16px}
  #tourDialog h2{font-size:19px}
  #tourDialog p{font-size:13.5px}
  .tour-actions button{min-height:42px}

  .collection-view{padding:32px 20px 48px}
  .collection-heading h1{font-size:30px}
  footer{flex-wrap:wrap;gap:8px;padding:16px}
  footer>span{margin:0;font-size:11.5px;order:3;width:100%}
}
@media (max-width:390px){
  .brand-image{width:88px;height:30px}
  .account-chip{width:34px;height:34px;padding:0;min-height:34px;justify-content:center}
  .account-chip span{display:none}
  .account-chip svg{display:block;width:16px;height:16px}
  .workflow-tabs button{font-size:11.5px}
  .workflow-tabs button>span{display:none}
}
@media (max-width:420px){
  .terrain-stats{grid-template-columns:repeat(3,minmax(0,1fr))}
  .terrain-stats>div:nth-child(4){display:none}
}
@media (prefers-reduced-motion:reduce){
  *{scroll-behavior:auto!important;transition:none!important;animation:none!important}
}

/* material legend and palette history, aligned with the new surface language */
#filamentLegend{display:flex;flex-wrap:wrap;gap:6px;margin-top:12px}
#filamentLegend span{
  display:inline-flex;align-items:center;gap:7px;
  padding:5px 10px 5px 8px;
  border:1px solid var(--line);border-radius:999px;background:#fff;
  font-size:12px;color:var(--ink-2);line-height:1.5;
}
#filamentLegend i{width:14px;height:14px;border-radius:50%;border:1px solid rgba(0,0,0,.12);flex:none}
#filamentLegend b{font-size:10.5px;font-weight:500;letter-spacing:.03em;color:var(--ink-3);font-variant-numeric:tabular-nums}
.palette-history-toggle{color:var(--accent)}
.palette-version.current{border-color:#bccbbf;background:var(--accent-soft)}
.palette-version-body>button{color:var(--accent);font-weight:600}
.palette-version-top strong{color:var(--ink)}
.palette-version-body>p{color:var(--ink-2)}