/* ============================================================
   STL Ruler — design system (tokens extracted from STL PhotoStudio)
   ============================================================ */
@font-face{
  font-family:'Instrument Sans';font-style:normal;font-weight:400;font-display:swap;
  src:url('../fonts/instrument-sans-400-latin.woff2') format('woff2');
  unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+030B,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD;
}
@font-face{
  font-family:'Instrument Sans';font-style:normal;font-weight:500;font-display:swap;
  src:url('../fonts/instrument-sans-500-latin.woff2') format('woff2');
  unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+030B,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD;
}
@font-face{
  font-family:'Instrument Sans';font-style:normal;font-weight:400;font-display:swap;
  src:url('../fonts/instrument-sans-400-latin-ext.woff2') format('woff2');
  unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF;
}
@font-face{
  font-family:'Instrument Sans';font-style:normal;font-weight:500;font-display:swap;
  src:url('../fonts/instrument-sans-500-latin-ext.woff2') format('woff2');
  unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF;
}

:root{
  --bg:#131311; --chrome:#1b1a18; --chrome-2:#232220;
  --line:#302e2b; --line-2:#43413d;
  --ink:#ece9e3; --ink-2:#a8a49c; --ink-3:#7a766f;
  --key:#e3ab4a; --key-ink:#3d2c0c;
  --cool:#7fa8cc;
  --good:#7fae6e;
  --bad:#a3564c;
  --r:10px;
  --axis-x:#d96a57; --axis-y:#7fae6e; --axis-z:#7fa8cc;
  /* canvas behind the artboard: a lighter grey than the dark artboard preset */
  --canvas:#252421; --canvas-dot:rgba(236,233,227,.09);
  /* docked side panels: width + one type scale + one spacing scale */
  --dock-w:288px;
  --fs-ui:12.5px;      /* section headers and every control */
  --fs-label:11.5px;   /* field labels, hints, secondary text */
  --fs-caption:11px;   /* small uppercase sub-captions */
  --gap:10px;          /* between blocks in a panel / drawer */
  --gap-field:8px;     /* side-by-side fields (row2 / row3) */
  --gap-grid:6px;      /* button grids */
  --gap-list:5px;      /* stacked list rows */
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0; background:var(--bg); color:var(--ink);
  font:14px/1.5 'Instrument Sans',system-ui,-apple-system,sans-serif;
  display:flex; flex-direction:column; overflow:hidden;
  -webkit-font-smoothing:antialiased;
}
/* form controls don't inherit the page font by default (drawer headers
   and icon buttons were rendering in Arial) */
button,input,select,textarea{font-family:inherit}
.hidden{display:none!important}
.dim{color:var(--ink-3)}
.small{font-size:12px}
.center{text-align:center}
.gold{color:var(--key)}

/* ---------------- buttons ---------------- */
.btn{
  display:inline-flex;align-items:center;gap:7px;
  border:1px solid var(--line-2);background:transparent;color:var(--ink-2);
  border-radius:999px;padding:8px 15px;font:500 13px 'Instrument Sans',sans-serif;
  cursor:pointer;min-height:34px;white-space:nowrap;user-select:none;
}
.btn:hover{background:var(--chrome-2);color:var(--ink)}
.btn.solid{background:var(--ink);color:#17160f;border-color:var(--ink)}
.btn.solid:hover{background:#fff}
.btn.icon{padding:8px;min-width:34px;justify-content:center}
.btn.danger{border-color:var(--bad);color:var(--bad)}
.btn.danger:hover{background:var(--bad);color:var(--ink)}
.btn.wide{width:100%;justify-content:center}
.btn.goldbtn{background:var(--key);color:var(--key-ink);border-color:var(--key);font-weight:500}
.btn.goldbtn:hover{filter:brightness(1.1)}
.btn.active{border-color:var(--cool);color:var(--cool)}
.btn svg,.tab svg{width:17px;height:17px;stroke:currentColor;fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.linklike{background:none;border:none;color:var(--cool);cursor:pointer;font:13px 'Instrument Sans',sans-serif;padding:6px 0}
.linklike:hover{color:var(--ink)}

input,select{
  background:var(--chrome-2);border:1px solid var(--line-2);border-radius:8px;
  color:var(--ink);padding:7px 10px;font:13px 'Instrument Sans',sans-serif;min-height:32px;width:100%;
}
input:focus,select:focus{outline:2px solid var(--cool);outline-offset:-1px}
input[type=color]{padding:2px;height:32px;cursor:pointer}
input[type=checkbox]{width:15px;height:15px;min-height:0;accent-color:var(--key)}
input[type=range]{padding:0}
label{display:flex;flex-direction:column;gap:5px;font-size:11.5px;color:var(--ink-3)}
.checkline{flex-direction:row;align-items:center;gap:8px;color:var(--ink-2);font-size:12.5px;cursor:pointer}

/* ---------------- header ---------------- */
#hdr{
  height:54px;flex:0 0 54px;background:var(--chrome);border-bottom:1px solid var(--line);
  display:flex;align-items:center;gap:16px;padding:0 14px;z-index:40;
}
.brand{display:flex;align-items:center;gap:9px;font-weight:500;font-size:15px}
.filechips{display:flex;gap:8px;align-items:center;flex:1;overflow-x:auto;scrollbar-width:thin}
.filechip{
  display:inline-flex;align-items:center;gap:7px;border:1px solid var(--line-2);
  border-radius:999px;padding:4px 6px 4px 12px;font-size:12.5px;color:var(--ink-2);
  background:var(--chrome-2);cursor:pointer;white-space:nowrap;min-height:30px;
}
.filechip:hover{color:var(--ink)}
.filechip.sel{border-color:var(--key);color:var(--ink)}
.filechip.missing{border-style:dashed;color:var(--ink-3)}
.filechip .nm{max-width:180px;overflow:hidden;text-overflow:ellipsis;background:none;border:none;color:inherit;font:inherit;padding:0;min-height:0}
.filechip .nm:focus{outline:none;border-bottom:1px solid var(--key)}
.filechip button{background:none;border:none;color:var(--ink-3);cursor:pointer;padding:3px;display:flex}
.filechip button:hover{color:var(--ink)}
.filechip button svg{width:14px;height:14px;stroke:currentColor;fill:none;stroke-width:1.7;stroke-linecap:round}
.actions{display:flex;gap:8px;align-items:center}
.avatarbtn{
  display:inline-flex;align-items:center;gap:8px;border:1px solid var(--line-2);
  border-radius:999px;background:transparent;color:var(--ink-2);padding:7px 14px;
  font:13px 'Instrument Sans',sans-serif;cursor:pointer;min-height:34px;
}
.avatarbtn:hover{background:var(--chrome-2);color:var(--ink)}
.avatarbtn.pro{border-color:var(--good);color:var(--good);box-shadow:0 0 0 1px var(--good) inset}
.statusdot{width:8px;height:8px;border-radius:50%;background:var(--ink-3)}
.avatarbtn.pro .statusdot{background:var(--good)}

/* ---------------- app body & panels ---------------- */
/* Docked side columns, attached to the window edges (header → drawer bar).
   Each dock: a scrolling main panel on top + a companion panel pinned to
   the bottom (left: Rulers list, right: Ruler tool). */
/* clip (not hidden): cuts off the mobile docks' off-screen parts without
   becoming scrollable — focusing a field there must never shift the app */
#appbody{flex:1;position:relative;display:flex;min-height:0;overflow:hidden;overflow:clip}
.dock{
  flex:0 0 var(--dock-w);width:var(--dock-w);min-height:0;position:relative;z-index:20;
  display:flex;flex-direction:column;background:var(--chrome);
}
#dock-left{border-right:1px solid var(--line)}
#dock-right{border-left:1px solid var(--line)}
.sidepanel{
  padding:14px 16px;display:flex;flex-direction:column;gap:var(--gap);
  overflow-y:auto;scrollbar-width:thin;min-height:0;
}
#panel-left,#panel-right{flex:1 1 auto}
#panel-rulers,#panel-rulertool{border-top:1px solid var(--line)}
#panel-rulertool{flex:0 0 auto}
/* the rulers list grows up to 40% of the dock, then scrolls as one area */
#panel-rulers{flex:0 1 auto;max-height:40%;min-height:96px}
#panel-rulers .dimlist{max-height:none;overflow:visible}
/* ONE header style for every panel section — standalone titles (Rulers,
   Ruler tool, Models, the selected model) and drawer headers alike */
.sidepanel h3, .drawer-h{
  font-size:var(--fs-ui);font-weight:500;line-height:20px;color:var(--ink-2);
  text-transform:uppercase;letter-spacing:.06em;margin:0;
}
#sel-none{display:flex;flex-direction:column;gap:var(--gap)}
/* selected model: its name as the panel title (gold, larger) + eye / remove */
.m-head{display:flex;align-items:center;gap:2px}
#m-title{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
  font-size:16px;line-height:22px;font-weight:500;color:var(--key);text-transform:none;letter-spacing:0}
.m-head .mr-btn{padding:4px}
.m-head .mr-btn svg{width:17px;height:17px}
.m-head #m-del:hover{color:var(--bad)}
.sidepanel p{margin:0}
.sidepanel .small{font-size:var(--fs-label)}
.sidepanel input,.sidepanel select,.sidepanel .btn,.sidepanel .linklike{font-size:var(--fs-ui)}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:var(--gap-field)}
.row3{display:grid;grid-template-columns:1fr 1fr 1fr;gap:var(--gap-field)}
/* a checkbox sharing a row with fields lines up with their inputs */
.row2>.checkline,.row3>.checkline{align-self:end;min-height:32px}
.btnrow{display:flex;gap:var(--gap-grid);flex-wrap:wrap}
/* Arrange: the six align buttons as 2 rows × 3 columns */
.aligngrid{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--gap-grid)}
.aligngrid .btn{width:100%;justify-content:center}
/* Arrange → Grid: models per row */
.gridcap{font-size:var(--fs-label);color:var(--ink-3);margin-bottom:-4px}
.gridrow{display:grid;grid-template-columns:repeat(4,1fr);gap:var(--gap-grid)}
.gridrow .btn{width:100%;justify-content:center;gap:5px;padding:6px 4px;min-width:0}
.btn svg.gridic{fill:currentColor;stroke:none;width:16px;height:16px}
.selhint{color:var(--ink-2);font-size:12.5px}
.segrow{display:flex;gap:0;border:1px solid var(--line-2);border-radius:999px;overflow:hidden;width:fit-content}
.segrow.wrap{flex-wrap:wrap;border-radius:12px}
.seg{
  background:transparent;border:none;border-right:1px solid var(--line);color:var(--ink-2);
  padding:7px 11px;font:12.5px 'Instrument Sans',sans-serif;cursor:pointer;min-height:30px;
}
.seg:last-child{border-right:none}
.seg:hover{background:var(--chrome-2);color:var(--ink)}
.seg.active{background:var(--ink);color:#17160f}
.swatches{display:grid;grid-template-columns:repeat(8,1fr);gap:5px}
.swatches button{aspect-ratio:1;border-radius:6px;border:1px solid var(--line-2);cursor:pointer;padding:0;min-height:0}
.swatches button:hover{transform:scale(1.12)}

/* ---------------- stage ---------------- */
/* lighter grey canvas with a subtle dot grid, so a dark artboard preset
   (#131311) never blends into the background; a faint ring outlines it too */
#stage{
  flex:1;min-width:0;position:relative;overflow:hidden;cursor:default;
  background-color:var(--canvas);
  background-image:radial-gradient(circle,var(--canvas-dot) 1px,transparent 1.3px);
  background-size:20px 20px;background-position:10px 10px;
}
#stage.space-pan{cursor:grab}
#stage-inner{position:absolute;inset:0;overflow:hidden}
#board-wrap{position:absolute;transform-origin:0 0}
#board{display:block;position:absolute;border-radius:2px;
  box-shadow:0 0 0 1px rgba(236,233,227,.07),0 10px 36px rgba(0,0,0,.45)}
#stage.dragging{outline:2px dashed var(--key);outline-offset:-8px}
#stage.ruler-mode{cursor:crosshair}
#stage.model-drag{cursor:grabbing}

.emptystate{position:absolute;inset:0;display:grid;place-items:center;pointer-events:none;z-index:5}
/* first screen: its own dark card, so it reads on a white or a dark artboard;
   the h1 is the page's main heading for search engines */
.emptystate .dropbox{
  border:1.5px dashed var(--line-2);border-radius:18px;padding:36px 44px;text-align:center;color:var(--ink-3);
  background:var(--chrome);max-width:min(460px,calc(100% - 32px));
  transition:border-color .15s,color .15s;
}
#stage.dragging .dropbox{border-color:var(--key);color:var(--key)}
.emptystate h1{font-size:21px;font-weight:500;color:var(--ink);margin:12px 0 4px;line-height:1.3}
.emptystate .big{font-size:15px;color:var(--ink-2);margin:0 0 10px}
.emptystate .small{font-size:12px;margin:0}
.emptystate .es-link{display:inline-block;margin-top:14px;font-size:12.5px;color:var(--cool);text-decoration:none;pointer-events:auto}
.emptystate .es-link:hover{color:var(--ink)}
.emptystate .es-actions{display:none;gap:10px;justify-content:center;margin-top:18px}
.emptystate .es-actions .btn{pointer-events:auto}
.emptystate.restore .es-actions{display:flex}
.emptystate.restore .es-link{display:none}
.emptystate.restore .dropbox{border-color:var(--key)}
@media (max-width:900px){.emptystate .dropbox{padding:28px 22px}}
.help-guide{color:var(--cool);text-decoration:none}
.help-guide:hover{color:var(--ink)}

.toasts{position:fixed;top:14px;left:50%;transform:translateX(-50%);display:flex;flex-direction:column;gap:8px;z-index:200;align-items:center;pointer-events:none}
.toast{
  background:rgba(27,26,24,.96);border:1px solid var(--line-2);border-radius:999px;
  padding:8px 18px;font-size:12.5px;color:var(--ink);box-shadow:0 6px 24px rgba(0,0,0,.4);
  animation:toastin .18s ease-out;
}
.toast.good{border-color:var(--good)}
.toast.bad{border-color:var(--bad)}
.toast.gold{border-color:var(--key);color:var(--key)}
@keyframes toastin{from{opacity:0;transform:translateY(-6px)}to{opacity:1;transform:none}}
@media (prefers-reduced-motion:reduce){.toast{animation:none}}

.zoomctl{
  position:absolute;left:14px;bottom:14px;z-index:20;display:flex;align-items:center;gap:6px;
  background:rgba(19,19,17,.9);backdrop-filter:blur(14px);border:1px solid var(--line-2);border-radius:999px;padding:5px 8px;
}
.zoomctl span{font-size:12px;color:var(--ink-3);min-width:42px;text-align:center}

#viewcube-wrap{
  width:100%;background:var(--chrome-2);border:1px solid var(--line-2);border-radius:12px;padding:8px;
}
#viewcube{display:block;width:100%;height:auto;cursor:pointer;touch-action:none}

/* ---------------- bottom drawer bar ---------------- */
#drawerbar{
  flex:0 0 auto;background:var(--chrome);border-top:1px solid var(--line);
  display:flex;align-items:stretch;position:relative;z-index:30;min-height:40px;
}
.tabs{display:flex}
.tab{
  background:transparent;border:none;border-right:1px solid var(--line);color:var(--ink-2);
  padding:0 18px;font:13px 'Instrument Sans',sans-serif;cursor:pointer;min-height:40px;
  display:inline-flex;align-items:center;gap:6px;
}
.tab:hover{color:var(--ink)}
.tab.active{color:var(--ink);box-shadow:inset 0 2px 0 var(--key)}
.drawerbody{display:none;align-items:center;gap:10px;padding:8px 14px;flex:1;overflow-x:auto;scrollbar-width:thin}
#drawerbar.open .drawerbody:not(.hidden){display:flex}
.lookrow{display:flex;gap:10px;align-items:center}
/* presets: one row (4 white artboards, 4 dark, then saved ones) — the
   drawer scrolls sideways when the window is narrower */
.presetrow{display:flex;flex-wrap:nowrap;gap:8px;align-items:start}
.look{
  width:104px;flex:0 0 104px;background:var(--chrome-2);border:1px solid var(--line-2);border-radius:8px;
  padding:5px;cursor:pointer;text-align:center;position:relative;
}
.presetrow .look{flex:none;width:96px}
.look:hover{border-color:var(--ink-3)}
.look img,.look .thumb{width:100%;height:56px;object-fit:cover;border-radius:5px;background:var(--bg);display:block}
.look .thumb{position:relative;overflow:hidden}
/* thumbnail mini dimension line in the preset's ruler colour */
.look .t-dimline{position:absolute;left:8px;right:8px;bottom:17px;border-bottom:1.5px solid currentColor;font-size:8px;line-height:1}
.look .t-dimline::before,.look .t-dimline::after{content:'';position:absolute;bottom:-2.5px;width:1.5px;height:5px;background:currentColor}
.look .t-dimline::before{left:0}
.look .t-dimline::after{right:0}
.look .t-dimline span{position:absolute;left:50%;transform:translateX(-50%);bottom:2px;padding:0 2px}
/* thumbnail mini model shape in the preset's outline/label colour */
.look .t-shape{position:absolute;left:50%;top:7px;transform:translateX(-50%);width:30px;height:22px;border:1.5px solid;border-radius:4px}
.look .t-viewtag{position:absolute;left:5px;bottom:3px;font-size:7.5px;font-weight:500;letter-spacing:.05em}
.look .cap{font-size:11.5px;color:var(--ink-2);margin-top:4px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.look .del{position:absolute;top:2px;right:2px;background:rgba(19,19,17,.85);border:none;color:var(--ink-3);border-radius:50%;width:18px;height:18px;cursor:pointer;font-size:11px;line-height:1;display:none;padding:0}
.look:hover .del{display:block}
.look .del:hover{color:var(--bad)}
.promobtn{
  margin-left:auto;align-self:center;margin-right:12px;position:sticky;right:12px;
  border:1px solid var(--key);color:var(--key);background:transparent;border-radius:999px;
  padding:8px 20px;font:500 13px 'Instrument Sans',sans-serif;cursor:pointer;min-height:34px;white-space:nowrap;
}
.promobtn:hover{background:var(--key);color:var(--key-ink)}
.promobtn.pro{border-color:var(--good);color:var(--good)}
.promobtn.pro:hover{background:var(--good);color:#17160f}
.lockbadge{display:inline-block;width:11px;height:11px;vertical-align:-1px;
  background:currentColor;color:var(--key);
  -webkit-mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M7 11V8a5 5 0 0110 0v3M5 11h14v10H5z' fill='black'/%3E%3C/svg%3E") center/contain no-repeat;
  mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M7 11V8a5 5 0 0110 0v3M5 11h14v10H5z' fill='black'/%3E%3C/svg%3E") center/contain no-repeat;
}
.lockbadge:empty::after{content:'';display:block;width:11px;height:11px}

/* ---------------- veil & sheets ---------------- */
.veil{position:fixed;inset:0;background:rgba(19,19,17,.55);backdrop-filter:blur(6px);z-index:80}
.sheet{
  position:fixed;left:50%;top:50%;transform:translate(-50%,-50%);z-index:90;
  width:400px;max-width:calc(100vw - 32px);max-height:calc(100vh - 60px);overflow-y:auto;
  background:rgba(27,26,24,.97);border:1px solid var(--line-2);border-radius:14px;padding:22px;
  display:flex;flex-direction:column;gap:12px;scrollbar-width:thin;
}
.sheet.pro{border-color:var(--key);width:430px}
/* the Unlock Pro modal always sits above every other sheet (e.g. Export) */
#sheet-pro{z-index:120}
.sheet h2{font-size:17px;font-weight:500;margin:0}
.sheet .x{
  position:absolute;top:10px;right:12px;background:none;border:none;color:var(--ink-3);
  font-size:20px;cursor:pointer;padding:4px;line-height:1;
}
.sheet .x:hover{color:var(--ink)}
.ticks{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:8px;font-size:13px;color:var(--ink-2)}
.ticks li{padding-left:24px;position:relative}
.ticks li::before{
  content:'';position:absolute;left:0;top:4px;width:14px;height:14px;
  -webkit-mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M4 12.5l5 5L20 6.5' fill='none' stroke='black' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center/contain no-repeat;
  mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M4 12.5l5 5L20 6.5' fill='none' stroke='black' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center/contain no-repeat;
  background:var(--good);
}
.ticks.bad li::before{background:var(--bad);
  -webkit-mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M6 6l12 12M18 6L6 18' fill='none' stroke='black' stroke-width='3' stroke-linecap='round'/%3E%3C/svg%3E") center/contain no-repeat;
  mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M6 6l12 12M18 6L6 18' fill='none' stroke='black' stroke-width='3' stroke-linecap='round'/%3E%3C/svg%3E") center/contain no-repeat;
}
.plangrid{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.planopt{border:1px solid var(--line-2);border-radius:10px;padding:10px 12px;cursor:pointer;background:var(--chrome-2)}
.planopt:hover{border-color:var(--ink-3)}
.planopt.sel{border-color:var(--key)}
.planopt .nm{font-weight:500;font-size:13px}
.planopt .pr{color:var(--key);font-size:15px;font-weight:500;margin-top:2px}
.planopt .ds{color:var(--ink-3);font-size:11.5px}
.sizegrid{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}
.sizeopt{border:1px solid var(--line-2);border-radius:10px;padding:9px 10px;cursor:pointer;background:var(--chrome-2);font-size:12.5px;color:var(--ink-2);text-align:center}
.sizeopt:hover{border-color:var(--ink-3);color:var(--ink)}
.sizeopt.sel{border-color:var(--cool);color:var(--ink)}
.sizeopt.locked{opacity:.75}
.sizeopt .lockbadge{margin-left:4px}
.exportpreview{border:1px solid var(--line);border-radius:10px;background:var(--bg);display:grid;place-items:center;padding:8px}
#export-thumb{max-width:100%;height:auto;border-radius:4px}
.helplist{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:9px;font-size:13px;color:var(--ink-2)}
.helplist b{color:var(--ink)}
.sheet.helpcard{width:470px}

/* ---------------- right-panel subcards ---------------- */
.subcard{border:1px solid var(--line);border-radius:12px;padding:10px 12px;display:flex;flex-direction:column;gap:var(--gap)}
.subcard h4{font-size:var(--fs-caption);font-weight:500;color:var(--ink-3);text-transform:uppercase;letter-spacing:.07em;margin:0}

/* ---------------- view grid & rotate ---------------- */
.viewgrid{display:grid;grid-template-columns:repeat(4,1fr);gap:var(--gap-grid)}
.vbtn{background:var(--chrome-2);border:1px solid var(--line-2);border-radius:8px;color:var(--ink-2);padding:6px 4px;font:var(--fs-ui) 'Instrument Sans',sans-serif;cursor:pointer;min-height:28px}
.vbtn:hover{border-color:var(--ink-3);color:var(--ink)}
.vbtn.active{background:var(--ink);color:#17160f;border-color:var(--ink)}
.vbtn.iconbtn{padding:4px;display:grid;place-items:center;min-height:36px}
.vbtn svg{display:block}
/* light-gray solid cube: three visible faces + all edges, gold highlight */
.vbtn .f-a{fill:#dbd8d1}
.vbtn .f-b{fill:#c8c5be}
.vbtn .f-c{fill:#b4b1aa}
.vbtn .cube line{stroke:#6f6b64;stroke-width:.9}
.vbtn .hl{stroke:var(--key);stroke-width:2.4;fill:none;stroke-linecap:round}
.vbtn .hlspot{fill:var(--key)}
.vbtn.active .f-a{fill:#8a857c}
.vbtn.active .f-b{fill:#7a766f}
.vbtn.active .f-c{fill:#6a665f}
.vbtn.active .cube line{stroke:#43413d}
.vbtn.active .hl{stroke:#17160f}
.vbtn.active .hlspot{fill:#17160f}
.rotrow{display:flex;gap:var(--gap-grid);align-items:center;flex-wrap:wrap}
.rotrow .btn{padding:6px 9px;min-height:30px;min-width:0}
.rotfield{flex:1;min-width:86px;flex-direction:row;align-items:center;gap:7px}
.rotfield input{min-height:30px}

/* ---------------- dimensions list ---------------- */
.dimlist{display:flex;flex-direction:column;gap:var(--gap-list);max-height:220px;overflow-y:auto;scrollbar-width:thin}
.dimgroup{font-size:var(--fs-caption);font-weight:500;color:var(--ink-3);text-transform:uppercase;letter-spacing:.07em;margin-top:8px}
.dimgroup:first-child{margin-top:0}
.dimrow{display:flex;align-items:center;gap:6px;border:1px solid var(--line);border-radius:8px;padding:5px 8px;cursor:pointer;font-size:var(--fs-ui);color:var(--ink-2)}
.dimrow.manual{border-left:2px solid var(--key)} /* gold edge = manual ruler */
.dimrow:hover{border-color:var(--ink-3);color:var(--ink)}
.dimrow.sel{border-color:var(--key)}
.dimrow .dl-label{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;flex:1;min-width:0}
.dimrow .dl-val{color:var(--ink);font-weight:500;white-space:nowrap}
.dimrow .dl-del{background:none;border:none;color:var(--ink-3);cursor:pointer;padding:0 2px;font-size:14px;line-height:1;min-height:0}
.dimrow .dl-del:hover{color:var(--bad)}

/* ---------------- pan lock ---------------- */
#zoom-lock.locked{color:var(--key);border-color:var(--key)}

/* ---------------- pro sheet (matches STL PhotoStudio) ---------------- */
.sheet.pro{border-color:var(--line-2);width:430px;padding:26px;gap:13px}
.pro-title{font-size:19px;font-weight:500}
.pro-title .t-dim{color:var(--ink-3)}
.pro-price{color:var(--key);font-size:21px;font-weight:500;margin-top:-8px}
.proticks{gap:9px}
.pro-tiers-head{margin-bottom:-6px}
.pro-tiers{display:flex;flex-direction:column;gap:6px}
.tierrow{display:flex;align-items:baseline;gap:8px;border:1px solid var(--line-2);border-radius:10px;padding:8px 12px;cursor:pointer;background:var(--chrome-2);font-size:12.5px;color:var(--ink-2);
  position:relative;isolation:isolate;transition:padding .22s ease,border-color .22s ease}
.tierrow:hover{border-color:var(--ink-3)}
.tierrow:focus-visible{outline:2px solid var(--cool);outline-offset:2px}
.tierrow .nm{font-weight:500;color:var(--ink);transition:font-size .22s ease}
.tierrow .slots{color:var(--ink-3);font-size:11.5px}
.tierrow .pr{margin-left:auto;color:var(--key);font-weight:500;white-space:nowrap}
.btn.whitepill{background:var(--ink);color:#17160f;border-color:var(--ink);border-radius:999px;padding:12px 15px;font-size:14px;min-height:46px}
.btn.whitepill:hover{background:#fff}
.pro-foot{display:flex;gap:6px;justify-content:center;align-items:center;font-size:11.5px;color:var(--ink-3);margin:0}
.pro-foot svg{flex:0 0 auto}

/* ---------------- checkout sheet (on-site Square card form) ---------------- */
#sheet-checkout{z-index:120}
.co-form{display:flex;flex-direction:column;gap:13px;transition:opacity .2s}
.co-back{align-self:flex-start;padding:0;margin-bottom:-6px;font-size:12px}
.co-summary{border:1px solid var(--line-2);border-radius:12px;background:var(--chrome-2);padding:4px 14px}
.co-row{display:flex;justify-content:space-between;gap:12px;font-size:13px;padding:7px 0;border-bottom:1px solid var(--line)}
.co-row:last-child{border-bottom:none}
.co-row span:last-child{text-align:right;font-weight:500}
.co-block{display:flex;flex-direction:column;gap:9px}
.co-blockhead{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:baseline;gap:2px 10px}
.co-blockhead > *{white-space:nowrap}
.co-blockhead .linklike{padding:0;font-size:12px}
.co-step{font-size:var(--fs-caption);font-weight:500;color:var(--ink-3);text-transform:uppercase;letter-spacing:.07em}
.co-forgot{align-self:flex-start;padding:0;font-size:12px;margin-top:-3px}
.co-signedin{margin-top:-4px}
.co-signedin span{color:var(--ink-2)}
.co-cardload{display:block;padding:14px 2px;border:1px dashed var(--line-2);border-radius:10px;text-align:center}
.co-err{margin:0;padding:9px 12px;border:1px solid var(--bad);border-radius:10px;background:rgba(163,86,76,.14);color:#e3a197;font-size:12.5px}
.co-sandbox{margin:-4px 0 0;font-size:11.5px;color:var(--key);text-align:center}
.co-pay .spinner{display:none}
/* busy: fields dim + locked, the pay button shows the loader + current step */
#sheet-checkout.busy .co-form > :not(.co-pay){opacity:.45;pointer-events:none}
#sheet-checkout.busy .co-pay{pointer-events:none}
#sheet-checkout.busy .co-pay .spinner{display:inline-block}
#sheet-checkout.busy .x{visibility:hidden}
.spinner{width:16px;height:16px;border-radius:50%;border:2px solid rgba(23,22,15,.25);border-top-color:#17160f;animation:spin .7s linear infinite;flex:0 0 auto}
@keyframes spin{to{transform:rotate(360deg)}}
.co-done{display:flex;flex-direction:column;align-items:center;text-align:center;gap:8px;padding:10px 0 2px}
.co-done h2{font-size:21px}
.co-done p{margin:0;font-size:14px;color:var(--ink-2)}
.co-done .btn{margin-top:12px}
.co-check{width:64px;height:64px;margin-bottom:6px}
.co-check circle{fill:none;stroke:var(--key);stroke-width:2.5;stroke-dasharray:151;stroke-dashoffset:151;animation:draw .55s ease-out forwards}
.co-check path{fill:none;stroke:var(--key);stroke-width:3.5;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:40;stroke-dashoffset:40;animation:draw .35s .45s ease-out forwards}
@keyframes draw{to{stroke-dashoffset:0}}
@media (prefers-reduced-motion:reduce){
  .spinner{animation-duration:2s}
  .co-check circle,.co-check path{animation:none;stroke-dashoffset:0}
}

/* ---------------- account sheet ---------------- */
.accrow{display:flex;justify-content:space-between;gap:12px;font-size:13px;color:var(--ink);border-bottom:1px solid var(--line);padding-bottom:8px}
.accrow .dim{flex:0 0 auto}
#acc-cancel.danger-armed{background:var(--bad);color:var(--ink)}

/* ---------------- export sheet extras ---------------- */
#export-copy{margin-top:-4px}
#export-server-note{margin:0}
#export-dxf-warn{margin:0;color:var(--key)}

/* ---------------- mobile panels toggle (hidden on desktop) ---------------- */
#btn-panels{display:none}

/* ---------------- responsive ---------------- */
@media (max-width:900px){
  /* every header control stays reachable: the actions row wraps, the file
     chips get their own full-width scrolling row below it */
  #hdr{flex-wrap:wrap;height:auto;flex:0 0 auto;min-height:54px;padding:8px 10px;row-gap:8px}
  #hdr .actions{flex-wrap:wrap;row-gap:6px}
  .filechips{order:3;flex:1 1 100%}
  #btn-panels{display:inline-flex}
  /* the docks leave the row to the canvas: the left one (artboard +
     rulers) slides in from the side via the header toggle, the right one
     (models / selection + ruler tool) waits at the bottom and slides up
     when touched */
  #dock-left{
    position:absolute;left:0;top:0;bottom:0;width:min(320px,86vw);z-index:60;
    border:1px solid var(--line-2);border-left:none;border-radius:0 14px 14px 0;
    transform:translateX(-112%);transition:transform .2s;
  }
  body.panels-open #dock-left{transform:none}
  #dock-right{
    position:absolute;left:0;right:0;bottom:0;width:100%;max-height:45%;z-index:50;
    border:1px solid var(--line-2);border-bottom:none;border-radius:14px 14px 0 0;
    transform:translateY(calc(100% - 44px));transition:transform .2s;
  }
  #dock-right:focus-within{transform:none}
  #dock-right #panel-rulertool{max-height:none}
}
@media (prefers-reduced-motion:reduce){
  #dock-left, #dock-right{transition:none}
}

/* ---------------- collapsible drawers (both panels) ---------------- */
/* Borderless, padding-free drawers: bold section titles with a divider line
   between drawers only (none above the first, none below the last). */
.drawer{border:none;border-radius:0;padding:0}
.drawer + .drawer{border-top:1px solid var(--line)}
.drawer-h{
  display:flex;align-items:center;justify-content:space-between;width:100%;
  background:none;border:none;cursor:pointer;border-radius:0;
  padding:10px 0;min-height:0;
}
/* a panel that starts with a drawer: its header sits flush with the panel's
   top padding, exactly like the standalone titles (Rulers, Ruler tool) */
.sidepanel>.drawer:first-child>.drawer-h{padding-top:0}
.drawer-h:hover{color:var(--ink)}
.drawer-h::after{content:'▸';font-size:20px;line-height:1;color:var(--ink-3);transition:transform .15s}
.drawer.open .drawer-h::after{transform:rotate(90deg)}
.drawer-b{display:none;flex-direction:column;gap:var(--gap);padding:0 0 14px}
.drawer.open .drawer-b{display:flex}

/* ---------------- right-panel cards ---------------- */
.card{border:1px solid var(--line);border-radius:12px;padding:10px 12px;display:flex;flex-direction:column;gap:var(--gap)}
.card>h3{margin-top:0}

/* ---------------- preset grids (artboard + views) ---------------- */
.presetgrid,.viewbtn-grid{display:grid;gap:var(--gap-grid)}
.presetgrid{grid-template-columns:repeat(4,1fr)}
.viewbtn-grid{grid-template-columns:repeat(3,1fr)}
.presetgrid .seg,.viewbtn-grid .seg{
  border:1px solid var(--line-2);border-radius:8px;padding:7px 4px;text-align:center;min-height:30px;
}
.presetgrid .spanall,.viewbtn-grid .spanall{grid-column:1/-1}

/* ---------------- models card (right panel default) ---------------- */
.modellist{display:flex;flex-direction:column;gap:var(--gap-list);max-height:280px;overflow-y:auto;scrollbar-width:thin}
.modelrow{display:flex;align-items:center;gap:6px;border:1px solid var(--line);border-radius:8px;padding:6px 8px;cursor:pointer}
.modelrow:hover{border-color:var(--ink-3)}
.modelrow.sel{border-color:var(--key)}
.modelrow.missing{border-style:dashed}
.mr-names{flex:1;min-width:0;display:flex;flex-direction:column;gap:1px}
.mr-label{font-size:12.5px;color:var(--ink);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.mr-file{font-size:var(--fs-label);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.mr-btn{background:none;border:none;color:var(--ink-3);cursor:pointer;padding:3px;display:flex;min-height:0}
.mr-btn:hover{color:var(--ink)}
.mr-btn svg{width:14px;height:14px;stroke:currentColor;fill:none;stroke-width:1.7;stroke-linecap:round}


/* ---------------- import settings orientation buttons ---------------- */
#orient-row .btn{padding:6px 9px;min-height:30px}

/* ---------------- pro sheet: the selected tier grows and turns gold ----------------
   (Solo is selected by default; picking another tier moves the look there, animated.
   The gold tint is a layer that fades — gradients themselves can't transition.) */
.tierrow::before{
  content:'';position:absolute;inset:0;z-index:-1;border-radius:inherit;pointer-events:none;
  background:linear-gradient(135deg,rgba(227,171,74,.14),transparent 60%);
  opacity:0;transition:opacity .22s ease;
}
.tierrow.sel{padding:13px 14px;border-color:var(--key)}
.tierrow.sel::before{opacity:1}
.tierrow.sel .nm{font-size:15px}
@media (prefers-reduced-motion:reduce){.tierrow,.tierrow::before,.tierrow .nm{transition:none}}
.tierrow .pop{
  margin-left:8px;background:var(--key);color:var(--key-ink);
  font-size:9.5px;font-weight:500;text-transform:uppercase;letter-spacing:.05em;
  border-radius:999px;padding:2px 7px;vertical-align:2px;white-space:nowrap;
}

/* ---------------- auth sheets: field spacing ---------------- */
#auth-main,#auth-forgotpane{display:flex;flex-direction:column;gap:12px}

/* ---------------- artboard: resolution + scale tools ---------------- */
.abres{font-size:var(--fs-label)}
.abres span{color:var(--ink-2);font-weight:500}
#ab-scalebtns{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--gap-grid)}
#ab-scalebtns .btn{padding:6px 4px;min-height:30px;justify-content:center;width:100%}

/* ---------------- orient rows (X / Y / Z / angle) ---------------- */
.orientrows{display:flex;flex-direction:column;gap:6px}
.orow{display:grid;grid-template-columns:40px 1fr 1fr 48px 32px;gap:var(--gap-grid);align-items:center}
.orow .btn{padding:6px 4px;min-height:30px;min-width:0;justify-content:center}
.orow .btn.icon{min-width:0;padding:6px}
.orow .oaxis{font-size:var(--fs-caption);font-weight:500;color:var(--ink-3);text-transform:uppercase;letter-spacing:.05em}
.orow .oval{text-align:center;font-size:var(--fs-ui);color:var(--ink-2)}
.orow input{min-height:30px;padding:5px 6px;text-align:center}

/* ---------------- color pickers: hex field + preset dots ---------------- */
.cpick{display:grid;grid-template-columns:44px 1fr;gap:var(--gap-grid);width:100%}
.cpick input[type=color]{width:44px}
.cpick-hex{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;text-transform:lowercase;padding-left:7px;padding-right:7px}
.cpick-dots{grid-column:1/-1;display:grid;grid-template-columns:repeat(4,1fr);gap:var(--gap-grid)}
.cpick-dot{aspect-ratio:1;width:100%;border-radius:50%;border:1px solid var(--line-2);cursor:pointer;padding:0;min-height:0}
.cpick-dot:hover{transform:scale(1.15);border-color:var(--ink-3)}

/* ---------------- models list: arrange-order buttons ---------------- */
.mr-order{display:flex;flex-direction:column;gap:0;flex:0 0 auto}
.mr-order button{background:none;border:none;color:var(--ink-3);cursor:pointer;font-size:8px;padding:2px 3px;line-height:1;min-height:0}
.mr-order button:hover{color:var(--ink)}
.mr-order button:disabled{opacity:.25;cursor:default}