:root {
  color-scheme: dark;
  --background:#0d1310; --panel:#121b16; --panel-light:#1a261f; --border:rgba(255,230,230,.17);
  --text:#fff3f3; --muted:#e6caca; --accent:#ffa6a6; --shadow:0 18px 60px rgba(0,0,0,.38);
}
*{box-sizing:border-box} html,body{width:100%;min-height:100%;margin:0;background:var(--background);color:var(--text);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif} button{font:inherit}
.site-shell{min-height:100vh;display:grid;grid-template-columns:172px minmax(0,1fr);grid-template-rows:auto minmax(0,1fr) auto;background:radial-gradient(circle at top right,rgba(255,166,166,.18),transparent 35%),var(--background)}
.site-header{grid-column:1/-1;min-height:102px;display:flex;align-items:center;justify-content:space-between;gap:24px;padding:18px 24px;border-bottom:1px solid var(--border);background:rgba(13,19,16,.94);backdrop-filter:blur(14px);z-index:5}
.brand-block{display:flex;align-items:center;gap:16px;min-width:0}.logo-shell{width:74px;height:74px;flex:0 0 74px;display:grid;place-items:center;padding:6px;border-radius:18px;border:1px solid rgba(255,166,166,.42);background:linear-gradient(180deg,rgba(255,166,166,.25),rgba(255,166,166,.14));box-shadow:var(--shadow)}.site-logo{width:100%;height:100%;object-fit:contain;border-radius:14px;display:block}
.eyebrow{margin:0 0 3px;color:var(--accent);font-size:.73rem;font-weight:800;letter-spacing:.16em} h1{margin:0;font-family:Georgia,"Times New Roman",serif;font-size:clamp(1.55rem,3vw,2.4rem);line-height:1}.subtitle{margin:7px 0 0;color:var(--muted);font-size:.93rem}.title-group strong{color:var(--accent)}
.utility-button,.floor-button,.viewer-controls button,.close-button{border:1px solid var(--border);color:var(--text);background:var(--panel-light);cursor:pointer;transition:transform 140ms ease,border-color 140ms ease,background 140ms ease;box-shadow:0 10px 30px rgba(0,0,0,.16)}
.utility-button:hover,.floor-button:hover,.viewer-controls button:hover,.close-button:hover{transform:translateY(-1px);border-color:rgba(255,166,166,.68);background:#2d2023}.utility-button{min-height:42px;padding:0 15px;border-radius:10px}
.floor-nav{grid-column:1;grid-row:2;display:flex;flex-direction:column;gap:8px;padding:16px 12px;overflow-y:auto;border-right:1px solid var(--border);background:var(--panel);z-index:3}.floor-button{width:100%;min-height:47px;padding:8px 10px;border-radius:9px;font-weight:750;text-align:left}.floor-button.active{color:#221417;background:var(--accent);border-color:var(--accent)}
.viewer-area{grid-column:2;grid-row:2;position:relative;min-width:0;min-height:580px;overflow:hidden;background:#080b09}.svg-viewer{position:absolute;inset:0;overflow:hidden;touch-action:none;cursor:grab;background:linear-gradient(rgba(255,166,166,.04) 1px,transparent 1px),linear-gradient(90deg,rgba(255,166,166,.04) 1px,transparent 1px),#080b09;background-size:30px 30px}.svg-viewer.dragging{cursor:grabbing}
.map-stack{position:absolute;left:0;top:0;transform-origin:0 0;will-change:transform}.map-layer{position:absolute;inset:0;width:100%;height:100%;object-fit:contain;opacity:0;visibility:hidden;user-select:none;-webkit-user-drag:none;pointer-events:none;transition:opacity 80ms linear}.map-layer.active{opacity:1;visibility:visible}
.loading-message{position:absolute;inset:50% auto auto 50%;transform:translate(-50%,-50%);padding:12px 16px;border:1px solid var(--border);border-radius:10px;background:rgba(13,19,16,.88);color:var(--muted);pointer-events:none;z-index:4}
.floor-badge{position:absolute;top:16px;left:16px;display:flex;flex-direction:column;gap:2px;padding:10px 13px;border:1px solid var(--border);border-radius:10px;background:rgba(12,18,14,.82);box-shadow:var(--shadow);backdrop-filter:blur(10px);pointer-events:none;z-index:4}.floor-badge span{font-weight:850}.floor-badge small{color:var(--muted)}
.credit-watermark{position:absolute;left:18px;bottom:18px;padding:7px 10px;border-radius:7px;color:rgba(255,230,230,.9);background:rgba(77,43,49,.52);font-size:.83rem;font-weight:750;letter-spacing:.03em;pointer-events:none;z-index:4}
.viewer-controls{position:absolute;right:16px;bottom:16px;display:grid;grid-template-columns:repeat(4,44px);gap:7px;z-index:5}.viewer-controls button{width:44px;height:44px;padding:0;border-radius:9px;font-size:1.24rem;font-weight:700;background:rgba(18,27,22,.91)}
.help-panel{position:fixed;inset:0;padding:24px;background:rgba(3,6,4,.72);backdrop-filter:blur(8px);z-index:20}.help-panel-inner{position:relative;width:min(660px,100%);max-height:calc(100vh - 48px);margin:0 auto;padding:28px;overflow-y:auto;border:1px solid var(--border);border-radius:16px;background:var(--panel);box-shadow:var(--shadow)}.help-panel h2{margin:23px 0 7px;font-family:Georgia,"Times New Roman",serif}.help-panel h2:first-of-type{margin-top:0}.help-panel p{color:var(--muted);line-height:1.62}.close-button{position:absolute;top:12px;right:12px;width:40px;height:40px;border-radius:50%;font-size:1.5rem}
.site-footer{grid-column:1/-1;min-height:42px;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:8px 18px;border-top:1px solid var(--border);background:var(--panel);color:var(--muted);font-size:.78rem}
@media(max-width:760px){.brand-block{align-items:flex-start}.logo-shell{width:58px;height:58px;flex-basis:58px;border-radius:14px}.site-shell{grid-template-columns:1fr;grid-template-rows:auto auto minmax(0,1fr) auto}.site-header{min-height:unset;align-items:flex-start;padding:15px}.eyebrow{font-size:.62rem}.subtitle{font-size:.8rem}.utility-button{min-height:38px;padding:0 10px;font-size:.8rem}.floor-nav{grid-column:1;grid-row:2;flex-direction:row;padding:10px;overflow-x:auto;border-right:0;border-bottom:1px solid var(--border);scrollbar-width:thin}.floor-button{width:auto;min-width:max-content;min-height:41px;text-align:center}.viewer-area{grid-column:1;grid-row:3;min-height:66vh}.site-footer{grid-row:4;align-items:flex-start;flex-direction:column;gap:3px}.floor-badge{top:10px;left:10px}.credit-watermark{left:10px;bottom:10px;font-size:.72rem}.viewer-controls{right:10px;bottom:10px;grid-template-columns:repeat(2,42px)}.viewer-controls button{width:42px;height:42px}}