/* Layout: three one-screen views. Home = tour list. Viewer = panorama + floating site plan. Builder = large site plan (left) + panel for the selected item (right; stacked on phones). */
:root{
  --bg:#eef2f1; --surface:#ffffff; --surface-2:#f4f7f6; --fg:#14262b; --muted:#5b6d70; --line:#d5dfdd;
  --accent:#d98e1b; --accent-fg:#1d1405; --ink:#123a4a; --ink-fg:#ffffff; --ok:#2f7d4f; --warn:#a8650a; --danger:#b23a2b;
  --glass:rgba(255,255,255,.9);
  --plan-bg:#f7f5ef; --plan-grid:#e6e2d6; --plan-bldg:#e7cf9f; --plan-bldg-line:#9b7d45; --plan-area:#d5e6c8; --plan-path:#cfcac0; --plan-wall:#7b6f62; --plan-text:#2b2a26;
  --f-ui:"Be Vietnam Pro",system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
  --f-mono:"JetBrains Mono",ui-monospace,Menlo,Consolas,monospace;
}
@media (prefers-color-scheme: dark){:root:not([data-theme="light"]){
  --bg:#0d1719; --surface:#142226; --surface-2:#1a2c31; --fg:#e4eeec; --muted:#93a7a9; --line:#2a3f44;
  --accent:#f0a83a; --accent-fg:#1d1405; --ink:#9fd3e3; --ink-fg:#0d1719; --ok:#6cc792; --warn:#f0b35a; --danger:#ef7a68; --glass:rgba(20,34,38,.9);
  --plan-bg:#1b2526; --plan-grid:#26353a; --plan-bldg:#6b5a3a; --plan-bldg-line:#c9a764; --plan-area:#2f4a33; --plan-path:#4a4c4a; --plan-wall:#a99c8c; --plan-text:#eef1ea; color-scheme:dark}}
:root[data-theme="dark"]{
  --bg:#0d1719; --surface:#142226; --surface-2:#1a2c31; --fg:#e4eeec; --muted:#93a7a9; --line:#2a3f44;
  --accent:#f0a83a; --accent-fg:#1d1405; --ink:#9fd3e3; --ink-fg:#0d1719; --ok:#6cc792; --warn:#f0b35a; --danger:#ef7a68; --glass:rgba(20,34,38,.9);
  --plan-bg:#1b2526; --plan-grid:#26353a; --plan-bldg:#6b5a3a; --plan-bldg-line:#c9a764; --plan-area:#2f4a33; --plan-path:#4a4c4a; --plan-wall:#a99c8c; --plan-text:#eef1ea; color-scheme:dark}
[hidden]{display:none!important}
html,body{height:100%}
body{background:var(--bg);color:var(--fg);font-family:var(--f-ui);font-size:14px;overflow:hidden}
button,select,input,textarea{font:inherit;color:inherit}
button{cursor:pointer}
button:disabled{cursor:not-allowed;opacity:.5}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.view{height:100%}

/* ---------- shared bits ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;border:1px solid var(--line);background:var(--surface-2);border-radius:9px;padding:7px 11px;font-weight:500;white-space:nowrap}
.btn:hover:not(:disabled){border-color:var(--muted)}
.btn.primary{background:var(--accent);color:var(--accent-fg);border-color:transparent;font-weight:600}
.btn.dark{background:var(--ink);color:var(--ink-fg);border-color:transparent}
.btn.danger{color:var(--danger)}
.btn.sm{padding:4px 8px;font-size:12.5px;border-radius:7px}
.btn svg{width:16px;height:16px;flex:none}
.lbl-hide{display:inline}
@media (max-width:600px){.lbl-hide{display:none}}
.bar{display:flex;align-items:center;gap:10px;background:var(--surface);border-bottom:1px solid var(--line);
  padding-left:max(12px,env(safe-area-inset-left,0px));padding-right:max(12px,env(safe-area-inset-right,0px));padding-block:8px;min-width:0}
.bar .where{min-width:0;flex:1;display:grid}
.bar .sub{font-size:12px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.bar .main{font-weight:700;font-size:16px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.field{display:grid;gap:4px}
.field label{font-size:12px;font-weight:600;color:var(--muted)}
.inp{background:var(--surface-2);border:1px solid var(--line);border-radius:8px;padding:8px 10px;width:100%;box-sizing:border-box;min-width:0}
.toast{position:fixed;right:max(16px,env(safe-area-inset-right,0px));top:calc(64px + env(safe-area-inset-top,0px));background:var(--ink);color:var(--ink-fg);padding:9px 14px;border-radius:10px;z-index:50;font-weight:500;max-width:calc(100% - 32px)}
.note{font-size:12.5px;color:var(--muted);line-height:1.5;margin:0}
dialog{border:1px solid var(--line);border-radius:14px;background:var(--surface);color:var(--fg);padding:16px;width:min(640px,calc(100% - 32px));box-sizing:border-box}
dialog::backdrop{background:rgba(0,0,0,.45)}
dialog textarea{width:100%;box-sizing:border-box;height:46vh;font-family:var(--f-mono);font-size:12px;background:var(--surface-2);border:1px solid var(--line);border-radius:8px;padding:10px;resize:vertical}
dialog h3{margin:0 0 8px}

/* ---------- home ---------- */
#home{overflow:auto;padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px));padding-block:28px;box-sizing:border-box}
.home-inner{max-width:920px;margin:0 auto;display:grid;gap:22px}
.eyebrow{font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);font-weight:600}
h1{font-size:clamp(26px,4vw,34px);line-height:1.15;margin:4px 0 6px;text-wrap:balance}
h2.sec-title{font-size:15px;margin:0;color:var(--muted);font-weight:600}
.lead{color:var(--muted);max-width:62ch;line-height:1.55;margin:0}
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:16px}
.card{display:grid;grid-template-rows:auto 1fr;border:1px solid var(--line);background:var(--surface);border-radius:14px;overflow:hidden}
.card .thumb{aspect-ratio:2/1;max-width:100%;background:var(--surface-2) center/cover no-repeat;display:grid;place-items:center;color:var(--muted);font-size:13px;border:0;padding:0;cursor:pointer}
.card .body{padding:12px 14px 14px;display:grid;gap:8px;align-content:start}
.card h3{font-size:16px;margin:0}
.card p{margin:0;color:var(--muted);line-height:1.45;font-size:13px}
.card .acts{display:flex;flex-wrap:wrap;gap:6px}
.card.new{border-style:dashed;background:transparent}
.card.new .thumb{background:transparent;font-size:40px;font-weight:300;color:var(--accent)}
.howto{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:14px;margin:0;padding:0;list-style:none}
.howto li{display:grid;grid-template-columns:28px 1fr;gap:10px;align-items:start;line-height:1.5}
.howto b{display:block}
.howto .n{width:26px;height:26px;border-radius:50%;display:grid;place-items:center;background:var(--ink);color:var(--ink-fg);font-weight:700;font-size:13px}

/* ---------- viewer ---------- */
#viewer{display:grid;grid-template-rows:auto 1fr}
.stage{position:relative;min-height:0}
#pano-view{position:absolute;inset:0;background:#0b1214}
.hint{position:absolute;left:50%;top:14px;transform:translateX(-50%);z-index:4;background:rgba(15,28,32,.86);color:#fff;padding:7px 13px;border-radius:99px;font-size:13px;
  max-width:calc(100% - 32px);text-align:center;pointer-events:none;transition:opacity .4s}
.mini{position:absolute;left:max(12px,env(safe-area-inset-left,0px));bottom:12px;z-index:4;width:min(260px,48vw);background:var(--glass);
  -webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border:1px solid var(--line);border-radius:12px;padding:8px 8px 6px;display:grid;gap:4px}
.mini .ph{display:flex;justify-content:space-between;align-items:center;font-size:12px;font-weight:600;color:var(--muted);padding:0 2px}
.mini .ph button{border:0;background:none;color:var(--muted);font-size:12px;padding:2px 4px}
.mini svg{width:100%;height:auto;max-height:42vh;display:block;border-radius:6px}
.mini.min svg{display:none}

/* hotspots (shared by viewer + builder preview) */
.hs-move{width:54px;height:54px;margin:-27px 0 0 -27px;border-radius:50%;background:rgba(255,255,255,.92);
  box-shadow:0 2px 10px rgba(0,0,0,.35),0 0 0 3px rgba(217,142,27,.85);display:grid;place-items:center;cursor:pointer}
.hs-move svg{width:30px;height:30px;color:#123a4a;transition:transform .2s}
.hs-move:hover svg{transform:translateY(-3px)}
.hs-move .tip,.hs-info .tip{position:absolute;bottom:62px;left:50%;transform:translateX(-50%);white-space:nowrap;background:rgba(15,28,32,.92);
  color:#fff;font:600 13px var(--f-ui);padding:5px 10px;border-radius:8px;pointer-events:none}
.hs-info{width:30px;height:30px;margin:-15px 0 0 -15px;border-radius:50%;background:#123a4a;color:#fff;border:2px solid #fff;
  display:grid;place-items:center;font:700 15px Georgia,serif;cursor:pointer;box-shadow:0 2px 8px rgba(0,0,0,.4)}
.hs-info .tip{bottom:38px;white-space:normal;width:max-content;max-width:220px;text-align:center;font-weight:500;line-height:1.4;opacity:0;transition:opacity .15s}
.hs-info:hover .tip,.hs-info.open .tip{opacity:1}
.hs-move svg{width:56%;height:56%}
.hs-move .tip{bottom:calc(100% + 8px)}
.pv .hs-move{cursor:grab;touch-action:none}
.pv .hs-move.dragging{cursor:grabbing;box-shadow:0 2px 10px rgba(0,0,0,.35),0 0 0 4px #fff,0 0 0 7px rgba(217,142,27,.95)}
.pv .hs-move.active{box-shadow:0 2px 10px rgba(0,0,0,.35),0 0 0 4px #fff,0 0 0 7px rgba(217,142,27,.95)}
.pv .hs-move .tip{font-size:12px}
.pv .hs-info{cursor:grab;touch-action:none}
.pv-tools{position:absolute;right:6px;top:6px;z-index:5;display:flex;gap:4px}
.pv-tools button{border:0;border-radius:7px;background:rgba(15,28,32,.8);color:#fff;font-size:12px;font-weight:600;padding:5px 8px}
.pv.big{position:fixed;z-index:40;inset:calc(58px + env(safe-area-inset-top,0px)) max(12px,env(safe-area-inset-right,0px)) calc(12px + env(safe-area-inset-bottom,0px)) max(12px,env(safe-area-inset-left,0px));aspect-ratio:auto;box-shadow:0 10px 40px rgba(0,0,0,.45)}
.pv-dock{position:absolute;left:8px;right:8px;bottom:8px;z-index:5;background:rgba(15,28,32,.88);color:#fff;border-radius:10px;padding:10px 12px;display:grid;gap:8px;font-size:12.5px;max-width:560px;margin:0 auto}
.pv:not(.big) .pv-dock{display:none}
.pv-dock .tune{background:transparent;border:0;padding:0;color:#fff}
.pv-dock .btn:not(.primary){color:#fff;background:rgba(255,255,255,.12);border-color:rgba(255,255,255,.3)}
.tune{display:grid;gap:8px;background:var(--surface-2);border:1px solid var(--accent);border-radius:10px;padding:10px}
.tune .lr{display:grid;grid-template-columns:86px 1fr 64px;gap:8px;align-items:center;font-size:12.5px}
.tune .lr b{font-weight:600}
.tune .lr output{font-family:var(--f-mono);font-size:12px;text-align:right;font-variant-numeric:tabular-nums}
.tune input[type=range]{width:100%;min-width:0}
.chips{display:flex;flex-wrap:wrap;gap:6px}
.chip-btn{border:1px solid var(--line);background:var(--surface-2);border-radius:99px;padding:4px 10px;font-size:12.5px}
.chip-btn[aria-pressed="true"]{background:var(--ink);color:var(--ink-fg);border-color:transparent}
.num{display:flex;align-items:center;gap:6px}
.num .inp{width:90px}
.measure-line{stroke:var(--danger);stroke-dasharray:10 6;fill:none}

/* ---------- builder ---------- */
#builder{display:grid;grid-template-rows:auto 1fr}
.bar .name-inp{font-weight:700;font-size:16px;border:1px solid transparent;background:transparent;border-radius:7px;padding:4px 6px;min-width:0;width:100%}
.bar .name-inp:hover,.bar .name-inp:focus{border-color:var(--line);background:var(--surface-2)}
.saved{font-size:12px;color:var(--muted);white-space:nowrap}
.work{display:grid;grid-template-columns:1fr 360px;min-height:0}
.mapwrap{position:relative;min-width:0;min-height:0;background:var(--plan-bg);overflow:hidden}
#map{position:absolute;inset:0;width:100%;height:100%;touch-action:none;user-select:none;-webkit-user-select:none}
#map.t-select{cursor:default}
#map.t-draw{cursor:crosshair}
#map.panning{cursor:grabbing}
.tools{position:absolute;top:10px;left:max(10px,env(safe-area-inset-left,0px));z-index:3;display:flex;flex-wrap:wrap;gap:4px;max-width:calc(100% - 20px);
  background:var(--glass);border:1px solid var(--line);border-radius:12px;padding:5px;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px)}
.tool{display:inline-flex;align-items:center;gap:6px;border:0;background:transparent;border-radius:8px;padding:6px 9px;font-weight:500;font-size:13px;white-space:nowrap}
.tool svg{width:17px;height:17px;flex:none}
.tool:hover{background:var(--surface-2)}
.tool[aria-pressed="true"]{background:var(--ink);color:var(--ink-fg)}
.tool.key[aria-pressed="false"]{box-shadow:inset 0 0 0 2px var(--accent)}
.tools .sep{width:1px;background:var(--line);margin:3px 2px}
.zoom{position:absolute;right:10px;bottom:10px;z-index:3;display:grid;gap:4px}
.zoom button{width:36px;height:36px;border-radius:9px;border:1px solid var(--line);background:var(--glass);font-size:18px;font-weight:600;display:grid;place-items:center}
.zoom button svg{width:17px;height:17px}
.banner{position:absolute;left:50%;bottom:14px;transform:translateX(-50%);z-index:4;background:var(--ink);color:var(--ink-fg);padding:8px 8px 8px 14px;border-radius:12px;
  display:flex;gap:10px;align-items:center;max-width:calc(100% - 80px);box-shadow:0 4px 16px rgba(0,0,0,.25);font-size:13px;line-height:1.4}
.banner .btn{flex:none}
.empty-map{position:absolute;inset:0;display:grid;place-items:center;pointer-events:none;z-index:1;padding:20px}
.empty-map > div{pointer-events:auto;background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:18px;max-width:360px;display:grid;gap:10px;text-align:center;box-shadow:0 6px 24px rgba(0,0,0,.08)}
.empty-map h3{margin:0}
.empty-map .row{justify-content:center}

/* map svg styles */
#map text,.mini text{font-family:var(--f-ui)}
.s-bldg{fill:var(--plan-bldg);stroke:var(--plan-bldg-line);stroke-width:2}
.s-area{fill:var(--plan-area);stroke:none}
.s-path{stroke:var(--plan-path);stroke-linecap:round;fill:none}
.s-wall{stroke:var(--plan-wall);stroke-linecap:square;fill:none}
.s-text{fill:var(--plan-text);font-weight:600;paint-order:stroke;stroke:var(--plan-bg);stroke-width:4px;stroke-linejoin:round}
.s-sel{fill:none;stroke:var(--accent);stroke-width:2;stroke-dasharray:6 4;pointer-events:none}
.handle{fill:var(--surface);stroke:var(--accent);stroke-width:2;cursor:nwse-resize}
.link-line{stroke:var(--accent);stroke-width:3;stroke-dasharray:8 6;fill:none}
.link-line.hot{stroke-dasharray:none;stroke-width:4}
.pt-dot{stroke:var(--surface);stroke-width:3}
.pt-dot.ok{fill:var(--ink)}
.pt-dot.noimg{fill:var(--surface);stroke:var(--ink);stroke-dasharray:4 3}
.pt-ring{fill:none;stroke:var(--accent);stroke-width:4}
.pt-label{font-size:14px;font-weight:600;fill:var(--plan-text);paint-order:stroke;stroke:var(--plan-bg);stroke-width:4px;stroke-linejoin:round;pointer-events:none}
.pt-start{fill:var(--accent);stroke:var(--surface);stroke-width:2}
.pt-hit{fill:transparent;cursor:pointer}
.pt-cand .pt-ring{stroke:var(--ok);stroke-dasharray:4 4}

/* panel */
.panel{background:var(--surface);border-left:1px solid var(--line);overflow:auto;display:grid;align-content:start;gap:0;min-height:0}
.psec{display:grid;gap:9px;padding:14px max(16px,env(safe-area-inset-right,0px)) 14px 16px;border-bottom:1px solid var(--line)}
.psec:last-child{border-bottom:0}
.psec h3{margin:0;font-size:14px;display:flex;align-items:center;gap:8px}
.psec h3 .step{width:22px;height:22px;border-radius:50%;background:var(--ink);color:var(--ink-fg);display:grid;place-items:center;font-size:12px;flex:none}
.psec h3 .step.done{background:var(--ok);color:#fff}
.psec p{margin:0;color:var(--muted);line-height:1.5;font-size:13px}
.row{display:flex;gap:8px;flex-wrap:wrap;align-items:center}
.pv{position:relative;aspect-ratio:16/10;max-width:100%;border-radius:10px;overflow:hidden;background:#0b1214}
.pv-view{position:absolute;inset:0}
.pv.picking{outline:3px solid var(--accent);outline-offset:-3px}
.pv.picking .pv-view{cursor:crosshair}
.pv .cross{position:absolute;left:50%;top:0;bottom:0;width:0;border-left:2px dashed rgba(255,255,255,.9);z-index:3;pointer-events:none;box-shadow:0 0 0 1px rgba(0,0,0,.3)}
.pv .cross::after{content:"";position:absolute;left:-9px;top:50%;width:14px;height:14px;margin-top:-9px;border:2px solid #fff;border-radius:50%;background:rgba(217,142,27,.7)}
.pv-empty{display:grid;place-items:center;gap:8px;text-align:center;color:#c9d6d6;padding:14px;position:absolute;inset:0;font-size:13px;line-height:1.5}
.drop{border:2px dashed var(--line);border-radius:10px;padding:14px;text-align:center;display:grid;gap:6px;color:var(--muted);font-size:13px;cursor:pointer;background:var(--surface-2)}
.drop:hover,.drop.over{border-color:var(--accent);color:var(--fg)}
.drop strong{color:var(--fg)}
.inline-msg{font-size:12.5px;line-height:1.45;padding:8px 10px;border-radius:8px;background:var(--surface-2);border:1px solid var(--line)}
.inline-msg.warn{border-color:var(--warn);color:var(--warn)}
.inline-msg.ok{border-color:var(--ok);color:var(--ok)}
.items{list-style:none;margin:0;padding:0;display:grid;gap:6px}
.items li{display:grid;grid-template-columns:auto 1fr auto;gap:8px;align-items:center;background:var(--surface-2);border:1px solid var(--line);border-radius:8px;padding:6px 6px 6px 10px;font-size:13px}
.items .k{font-size:11px;font-weight:700;padding:2px 6px;border-radius:5px;background:var(--accent);color:var(--accent-fg)}
.items .k.i{background:var(--ink);color:var(--ink-fg)}
.items .d{min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.items small{font-family:var(--f-mono);color:var(--muted);font-size:11px}
.items .acts{display:flex;gap:2px}
.items .acts button{border:0;background:none;padding:4px 6px;font-size:12.5px;color:var(--ink);border-radius:6px}
.items .acts button:hover{background:var(--surface)}
.items .acts button.del{color:var(--danger)}
.checklist{list-style:none;margin:0;padding:0;display:grid;gap:6px}
.checklist li{display:grid;grid-template-columns:20px 1fr;gap:8px;align-items:start;font-size:13px;line-height:1.45}
.checklist .ic{width:18px;height:18px;border-radius:50%;display:grid;place-items:center;font-size:11px;font-weight:700;margin-top:1px}
.checklist .ic.ok{background:var(--ok);color:#fff}
.checklist .ic.no{border:2px solid var(--warn);color:var(--warn);box-sizing:border-box}
.checklist a{color:var(--ink);cursor:pointer;text-decoration:underline}
.seg{display:grid;grid-template-columns:repeat(2,1fr);border:1px solid var(--line);border-radius:9px;overflow:hidden}
.seg button{border:0;background:var(--surface-2);padding:7px}
.seg button[aria-pressed="true"]{background:var(--ink);color:var(--ink-fg);font-weight:600}

@media (max-width:820px){
  .work{grid-template-columns:1fr;grid-template-rows:minmax(300px,55%) 1fr}
  .panel{border-left:0;border-top:1px solid var(--line)}
  .tool .t{display:none}
  .tool{padding:7px}
  .banner{max-width:calc(100% - 70px);left:10px;transform:none}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}
/* view / admin switches */
html:not(.is-admin) [data-admin]{display:none!important}
html.is-admin [data-view]{display:none!important}
.admin-bar{margin-top:10px}
a.btn{text-decoration:none;color:inherit}
#auth{overflow:auto;display:grid;place-items:center;padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px));padding-block:24px;box-sizing:border-box}
#auth:not([hidden]){display:grid}
.auth-card{width:min(380px,100%);background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:22px;display:grid;gap:12px;box-sizing:border-box}
.auth-card h1{font-size:24px;margin:0}