:root{
  --ui:#262420; --muted:#7d7a72; --accent:#a8443a; --accent-soft:rgba(168,68,58,.12); --tech:'IBM Plex Mono','Share Tech Mono','Courier New',monospace;
  --barbg:rgba(236,228,215,.95); --line:rgba(38,36,32,.14); --inv:1;
  --ui-font:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC","Helvetica Neue",sans-serif;
}
*{box-sizing:border-box}
html,body{margin:0;height:100%;overscroll-behavior:none}
body{
  font-family:var(--ui-font);color:var(--ui);display:flex;flex-direction:column;
  background:#3a3b37 radial-gradient(ellipse at 50% 0%,#55574f 0%,#3b3c37 55%,#2b2c29 100%) fixed;
  -webkit-tap-highlight-color:transparent;user-select:none;-webkit-user-select:none;-webkit-touch-callout:none;
}
/* ---------- toolbar ---------- */
#bar{position:relative;z-index:20;background:var(--barbg);backdrop-filter:blur(12px) saturate(1.2);-webkit-backdrop-filter:blur(12px) saturate(1.2);
  border-bottom:1px solid var(--line);box-shadow:0 4px 18px rgba(0,0,0,.22);padding-top:env(safe-area-inset-top)}
.row{display:flex;align-items:center;gap:8px;padding:8px 14px;overflow-x:auto;scrollbar-width:none;padding-left:max(14px,env(safe-area-inset-left));padding-right:max(14px,env(safe-area-inset-right))}
.row::-webkit-scrollbar{display:none}
.row.sub{padding-top:0;padding-bottom:8px;min-height:46px}
.brand{font-family:var(--tech);font-weight:600;font-size:22px;letter-spacing:.06em;line-height:1;color:#262420;flex:none;display:flex;align-items:baseline;gap:6px;padding-right:4px}
.brand small{font-family:var(--tech);font-weight:500;font-size:10.5px;letter-spacing:.14em;color:var(--accent);border:1px solid rgba(168,68,58,.5);padding:2px 6px;border-radius:2px}
.grp{display:flex;align-items:center;gap:2px;padding:3px;background:rgba(38,36,32,.07);border-radius:10px;flex:none}
button{font:inherit;color:inherit;border:0;background:transparent;cursor:pointer;border-radius:10px;display:inline-flex;align-items:center;justify-content:center;gap:6px;
  padding:7px 10px;font-size:14px;white-space:nowrap;flex:none;touch-action:manipulation;transition:background .15s,color .15s,box-shadow .15s}
button svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;flex:none}
button svg .red{stroke:#c0574a}
button svg.dots{fill:currentColor;stroke:none}
@media (hover:hover){button:hover{background:rgba(38,36,32,.09)}.btn.primary:hover{background:#953a31}#selbar button:hover{background:rgba(255,255,255,.12)}}
button:disabled{opacity:.3;cursor:default;background:transparent}
.btn.on{background:#262420;color:#ECE4D7}
.seg button.on{background:#f8f5ef;color:var(--accent);box-shadow:0 1px 3px rgba(60,30,10,.18)}
.btn{background:rgba(38,36,32,.07);border-radius:10px;padding:9px 13px}
.btn.primary{background:var(--accent);color:#f6f1e8;box-shadow:0 2px 6px rgba(168,68,58,.3)}
.btn.danger{background:#b3261e;color:#fff}
.spacer{flex:1 0 8px}
.zoom button{min-width:34px;padding:7px 8px;font-variant-numeric:tabular-nums}
#zoomVal{font-family:var(--tech);font-size:12px;min-width:50px;color:var(--muted)}
.panel{display:none;align-items:center;gap:12px;flex:none}
body[data-panel=select] #pSelect,body[data-panel=pen] #pPen,body[data-panel=eraser] #pPen,body[data-panel=text] #pText{display:flex}
body[data-panel=eraser] #penColors{display:none}
body:not([data-panel=eraser]) #eraserHint{display:none}
.hint{font-size:12.5px;color:var(--muted);white-space:nowrap}
.row.sub .lbl,.saved{font-family:var(--tech);letter-spacing:.04em}
.lbl{font-size:12.5px;color:var(--muted)}
.swatches{display:flex;gap:7px;padding:0 2px}
.sw{width:26px;height:26px;border-radius:50%;padding:0;border:2.5px solid #fffdf8;box-shadow:0 0 0 1px rgba(0,0,0,.18);position:relative}
.sw.on{box-shadow:0 0 0 2px var(--accent)}
.size{display:flex;align-items:center;gap:8px}
input[type=range]{accent-color:var(--accent);width:130px}
#sizePrev{display:inline-block;border-radius:50%;background:var(--ui);flex:none}
.size .prevbox{width:28px;height:28px;display:grid;place-items:center}
select{font:inherit;font-size:14px;padding:6px 10px;border-radius:10px;border:1px solid var(--line);background:#fffdf8;color:var(--ui);max-width:170px}
.mini{padding:2px}.mini button{padding:5px 8px;font-size:13px}
#fsVal{min-width:30px;text-align:center;font-size:13px;font-variant-numeric:tabular-nums;color:var(--muted)}
.tints{display:flex;align-items:center;gap:8px;flex:none}
.tints i{width:14px;height:14px;border-radius:50%;display:inline-block;box-shadow:inset 0 0 0 1px rgba(0,0,0,.15)}
.tints button{padding:5px 9px;font-size:13px}
#reseed{padding:6px 9px;font-size:15px}
.saved{font-size:11.5px;color:var(--muted);min-width:56px;transition:opacity .4s}
/* ---------- stage & page ---------- */
#stage{flex:1;overflow:auto;position:relative;padding:28px 18px 80px;-webkit-overflow-scrolling:touch}
#sizer{margin:0 auto;position:relative}
#page{position:absolute;left:0;top:0;width:1080px;height:1440px;transform-origin:0 0;overflow:hidden;border-radius:2px;
  box-shadow:0 30px 60px rgba(0,0,0,.45),0 6px 14px rgba(0,0,0,.3),0 0 0 1px rgba(0,0,0,.08)}
#bg,#ink{position:absolute;left:0;top:0;width:100%;height:100%;display:block}
#items{position:absolute;inset:0;z-index:1}
#ink{z-index:2;pointer-events:none;touch-action:none}
body.draw #ink{pointer-events:auto;cursor:crosshair}
body[data-tool=eraser] #ink{cursor:none}
body[data-tool=text] #items{cursor:text}
#hint{position:absolute;left:0;right:0;top:46%;text-align:center;z-index:3;pointer-events:none;font-family:var(--tech);letter-spacing:.06em;
  font-size:30px;color:rgba(42,51,70,.38);padding:0 60px;transition:opacity .4s}
#hint.off{opacity:0}
#cursor{position:absolute;z-index:4;border-radius:50%;border:calc(1.5px*var(--inv)) solid rgba(60,40,20,.7);background:rgba(255,255,255,.25);pointer-events:none;display:none;transform:translate(-50%,-50%)}
/* ---------- items ---------- */
.item{position:absolute;touch-action:none;transform-origin:50% 50%;cursor:grab}
.item:active{cursor:grabbing}
.item.photo,.item.video{background:transparent}
.item[data-frame=polaroid]{background:#f8f6f1 linear-gradient(160deg,#fbfaf6,#efebe3);box-shadow:0 1px 1px rgba(0,0,0,.14),0 10px 22px rgba(60,38,10,.33)}
.item[data-frame=tape]{background:#fdfbf6;box-shadow:0 1px 1px rgba(0,0,0,.12),0 7px 16px rgba(60,38,10,.3)}
.item[data-frame=none] .media{box-shadow:0 7px 18px rgba(60,38,10,.38)}
.media{width:100%;height:100%;overflow:hidden;position:relative;background:#2a2622}
.media img,.media video{width:100%;height:100%;object-fit:cover;display:block;pointer-events:none;-webkit-user-drag:none}
.vintage .media img,.vintage .media video{filter:sepia(.4) saturate(.8) contrast(.95) brightness(1.03)}
.media .missing{position:absolute;inset:0;display:grid;place-items:center;color:#cbb;font-size:22px}
.tape{display:none;position:absolute;width:120px;height:34px;background:var(--tape);pointer-events:none;z-index:2;
  background-image:repeating-linear-gradient(45deg,rgba(255,255,255,.28) 0 4px,transparent 4px 12px)}
.item[data-frame=tape] .tape{display:block}
.tape.a{left:-44px;top:-1px;transform:rotate(-45deg)}
.tape.b{left:calc(100% - 76px);top:calc(100% - 33px);transform:rotate(-45deg)}
.vbadge{position:absolute;left:50%;top:50%;width:72px;height:72px;margin:-36px 0 0 -36px;border-radius:50%;background:rgba(20,15,10,.45);display:grid;place-items:center;pointer-events:none;transition:opacity .25s;backdrop-filter:blur(2px)}
.vbadge svg{width:30px;height:30px;fill:#fff;margin-left:5px}
.playing .vbadge{opacity:0}
.vtag{position:absolute;right:10px;top:10px;font-size:15px;padding:3px 8px;border-radius:8px;background:rgba(20,15,10,.45);color:#fff;pointer-events:none;letter-spacing:.05em}
.item.text{min-width:40px}
.txt{padding:6px 10px;white-space:pre-wrap;overflow-wrap:anywhere;word-break:break-word;line-height:1.35;outline:none;min-height:1.35em}
.txt:empty::before{content:'写点什么…';opacity:.35}
.item.text.note{background:#efe6c8;box-shadow:0 1px 1px rgba(0,0,0,.08),0 6px 14px rgba(40,40,30,.2)}
/* label-maker tape: embossed light lettering on coloured tape */
.item.text.label{background:var(--label);border-radius:3px;box-shadow:inset 0 1px 0 rgba(255,255,255,.18),inset 0 -1px 0 rgba(0,0,0,.25),0 2px 4px rgba(0,0,0,.25)}
.item.text.label .txt{color:#F3EEE4!important;font-weight:600;text-transform:uppercase;letter-spacing:.12em;line-height:1.2;padding:8px 16px;text-shadow:0 -1px 0 rgba(0,0,0,.35),0 1px 0 rgba(255,255,255,.12)}
.item.text.note .txt{padding:18px 20px}
.item.text.editing{cursor:text}
.item.text.editing .txt{user-select:text;-webkit-user-select:text;cursor:text}
.item.editing{outline:calc(2px*var(--inv)) solid rgba(180,87,46,.9);outline-offset:calc(5px*var(--inv))}
#selbox{position:absolute;display:none;z-index:100000;pointer-events:none;transform-origin:50% 50%;
  outline:calc(2px*var(--inv)) dashed rgba(180,87,46,.9);outline-offset:calc(5px*var(--inv))}
#selbox.editing{outline:none}
.h{position:absolute;z-index:5;width:calc(30px*var(--inv));height:calc(30px*var(--inv));border-radius:50%;background:#fffdf8;pointer-events:auto;
  border:calc(2.5px*var(--inv)) solid var(--accent);box-shadow:0 2px 6px rgba(0,0,0,.3);touch-action:none}
#selbox.editing .h{display:none}
.h.size{right:calc(-20px*var(--inv));bottom:calc(-20px*var(--inv));cursor:nwse-resize}
.h.rot{left:50%;top:calc(-56px*var(--inv));margin-left:calc(-15px*var(--inv));cursor:alias}
.h.rot::after{content:'';position:absolute;left:50%;top:100%;width:calc(2px*var(--inv));margin-left:calc(-1px*var(--inv));height:calc(22px*var(--inv));background:rgba(180,87,46,.8)}
@media (pointer:coarse){.h{width:calc(40px*var(--inv));height:calc(40px*var(--inv))}.h.rot{margin-left:calc(-20px*var(--inv));top:calc(-66px*var(--inv))}.h.size{right:calc(-26px*var(--inv));bottom:calc(-26px*var(--inv))}}
/* ---------- selection bar ---------- */
#selbar{position:fixed;z-index:30;display:none;align-items:center;gap:1px;padding:4px;background:rgba(43,35,29,.93);color:#f4ecdd;border-radius:13px;
  box-shadow:0 8px 24px rgba(0,0,0,.35);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);max-width:calc(100vw - 16px);overflow-x:auto;scrollbar-width:none}
#selbar::-webkit-scrollbar{display:none}
#selbar button{color:#f4ecdd;padding:7px 9px;font-size:13px;gap:5px}
#selbar button svg{width:17px;height:17px}
#selbar button.on{color:#ffcf86}
#selbar .sep{width:1px;height:20px;background:rgba(255,255,255,.15);margin:0 3px;flex:none}
#selbar .del{color:#ff9d8f}
#selbar .tsw{width:14px;height:14px;border-radius:4px;display:inline-block;box-shadow:inset 0 0 0 1px rgba(255,255,255,.4)}
/* ---------- overlays ---------- */
#drop{position:fixed;inset:0;z-index:50;display:none;place-items:center;background:rgba(40,30,20,.35);pointer-events:none}
#drop div{font-family:var(--tech);letter-spacing:.08em;font-size:30px;color:#fff;padding:40px 70px;border:3px dashed rgba(255,255,255,.8);border-radius:28px;background:rgba(40,30,20,.4)}
body.dragging #drop{display:grid}
#toast{position:fixed;left:50%;bottom:calc(28px + env(safe-area-inset-bottom));transform:translate(-50%,20px);z-index:60;background:rgba(43,35,29,.94);color:#f6efe2;
  padding:10px 18px;border-radius:12px;font-size:14px;opacity:0;pointer-events:none;transition:opacity .25s,transform .25s;box-shadow:0 8px 20px rgba(0,0,0,.3)}
#toast.show{opacity:1;transform:translate(-50%,0)}
#modal{position:fixed;inset:0;z-index:70;display:grid;place-items:center;background:rgba(30,22,15,.45)}
#modal[hidden]{display:none}
#modal .card{background:#ECE4D7;border-radius:18px;padding:22px 24px 18px;width:min(360px,calc(100vw - 32px));box-shadow:0 20px 50px rgba(0,0,0,.4)}
#modal h3{margin:0 0 8px;font-size:18px}
#modal p{margin:0 0 18px;color:var(--muted);font-size:14px;line-height:1.6}
#modal .acts{display:flex;justify-content:flex-end;gap:10px}
@media (max-width:1420px){.brand small{display:none}}
@media (max-width:820px){
  .row.main button span{display:none}
  .row.main{flex-wrap:wrap;justify-content:center;overflow:visible}
  .row.main .spacer{display:none}
  .row.sub{justify-content:center}
  .brand small{display:none}
  .row{gap:6px;padding-left:10px;padding-right:10px}
  #stage{padding:16px 10px 80px}
  .tints span:not(.saved){display:none}
  .tints .lbl{display:none}
}
@media (max-width:520px){.brand{display:none}.hint{display:none}.zoom{display:none}.row{gap:5px}.row.main button{padding:7px 8px}.row.main .btn{padding:8px 9px}.row.sub{min-height:40px;padding-bottom:6px}}