:root{--ink:#1d1d1f;--mute:#6e6e73;--faint:#a1a1a6;--line:#e5e5e7;--soft:#f5f5f7;--red:#ff3b30;--blue:#0a84ff;
  --st:env(safe-area-inset-top);--sb:env(safe-area-inset-bottom)}
*{box-sizing:border-box;margin:0;padding:0;-webkit-tap-highlight-color:transparent}
html,body{height:100%;overflow:hidden;background:#fff;color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"SF Pro Text","Segoe UI",Helvetica,Arial,sans-serif;-webkit-font-smoothing:antialiased;overscroll-behavior:none}
button{font:inherit;color:inherit;border:none;background:none;cursor:pointer}
svg{display:block}
.hidden{display:none!important}
.screen{position:fixed;inset:0;display:none;flex-direction:column;background:#fff}
.screen.on{display:flex}
.screen.dark{background:#000;color:#fff}

/* home */
.top{display:flex;align-items:flex-end;justify-content:space-between;padding:calc(var(--st) + 22px) 22px 10px}
.eyebrow{font-size:12px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--mute)}
h1{font-size:34px;font-weight:800;letter-spacing:-.025em}
.ghostbtn{font-size:15px;font-weight:600;color:var(--mute);padding:8px 4px}
#pages{flex:1;overflow:auto;padding:10px 18px 30px;display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:16px;align-content:start;-webkit-overflow-scrolling:touch}
.pg{position:relative;border-radius:10px;overflow:hidden;background:var(--soft);box-shadow:0 2px 10px rgba(0,0,0,.08),0 0 0 1px rgba(0,0,0,.04);aspect-ratio:1/1.414;display:flex;align-items:center;justify-content:center}
.pg img{max-width:100%;max-height:100%;display:block}
.pg span{position:absolute;left:8px;bottom:8px;background:rgba(29,29,31,.85);color:#fff;font-size:12px;font-weight:700;border-radius:999px;padding:3px 9px}
#empty{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:0 40px 40px}
#empty .eicon{width:76px;height:76px;border-radius:22px;background:var(--ink);color:#fff;display:flex;align-items:center;justify-content:center;margin-bottom:20px}
#empty .eicon svg{width:36px;height:36px}
#empty h2{font-size:22px;font-weight:700;letter-spacing:-.01em}
#empty p{color:var(--mute);font-size:15px;line-height:1.45;margin-top:8px}
.bottom{display:flex;align-items:center;justify-content:space-around;padding:14px 26px calc(var(--sb) + 16px);border-top:1px solid var(--line);background:rgba(255,255,255,.92);backdrop-filter:blur(20px)}
.bottom .side{display:flex;flex-direction:column;align-items:center;gap:4px;width:70px;font-size:12px;font-weight:600;color:var(--ink)}
.bottom .side svg{width:26px;height:26px}
.bottom .side:disabled{opacity:.3}
.shutter{width:76px;height:76px;border-radius:50%;border:4px solid var(--ink);display:flex;align-items:center;justify-content:center}
.shutter i{width:60px;height:60px;border-radius:50%;background:var(--ink);transition:transform .15s}
.shutter:active i{transform:scale(.9)}

/* bars */
.bar{display:flex;align-items:center;justify-content:space-between;padding:calc(var(--st) + 10px) 14px 10px;min-height:52px}
.bar b{font-size:16px;font-weight:700}
.bar .txt{font-size:16px;padding:6px;min-width:60px;text-align:left}
.bar .txt.strong{font-weight:700;text-align:right}
.screen.dark .bar .txt.strong{color:#ffd60a}
.tools{display:flex;justify-content:space-around;padding:12px 10px calc(var(--sb) + 14px)}
.tools button{display:flex;flex-direction:column;align-items:center;gap:5px;font-size:11.5px;font-weight:600;min-width:56px}
.tools button svg{width:24px;height:24px}
.tools.light{border-top:1px solid var(--line)}
.tools .red{color:var(--red)}

/* crop */
.stage{flex:1;position:relative;display:flex;align-items:center;justify-content:center;overflow:hidden;touch-action:none}
#cropCanvas{max-width:100%;max-height:100%;display:block}
#cropSvg{position:absolute;overflow:visible;touch-action:none}
#cropSvg polygon{fill:rgba(255,214,10,.14);stroke:#ffd60a;stroke-width:2.5;stroke-linejoin:round}
#cropSvg circle.h{fill:rgba(255,255,255,.95);stroke:#ffd60a;stroke-width:3}
#cropSvg circle.hit{fill:transparent}
.loupe{position:fixed;width:120px;height:120px;border-radius:50%;overflow:hidden;border:3px solid #fff;box-shadow:0 6px 20px rgba(0,0,0,.5);display:none;pointer-events:none;z-index:5}
.loupe canvas{display:block}

/* filter / page */
.preview{flex:1;display:flex;align-items:center;justify-content:center;padding:14px;background:var(--soft);overflow:hidden}
.preview canvas,.preview img{max-width:100%;max-height:100%;box-shadow:0 6px 24px rgba(0,0,0,.15);background:#fff}
.chips{display:flex;gap:10px;overflow-x:auto;padding:14px 16px calc(var(--sb) + 16px);-webkit-overflow-scrolling:touch}
.chip{flex:none;display:flex;flex-direction:column;align-items:center;gap:6px;font-size:12px;font-weight:600;color:var(--mute)}
.chip canvas{width:72px;height:92px;border-radius:9px;object-fit:cover;box-shadow:0 0 0 1px var(--line)}
.chip.on{color:var(--ink)}
.chip.on canvas{box-shadow:0 0 0 2.5px var(--ink)}

/* sheet */
#sheetBg{position:fixed;inset:0;background:rgba(0,0,0,.35);z-index:20;display:flex;align-items:flex-end}
#sheet{width:100%;background:#fff;border-radius:22px 22px 0 0;padding:10px 22px calc(var(--sb) + 22px);animation:up .25s ease}
@keyframes up{from{transform:translateY(100%)}to{transform:none}}
.grab{width:40px;height:5px;border-radius:3px;background:#d1d1d6;margin:0 auto 14px}
#sheet h3{font-size:22px;font-weight:800;letter-spacing:-.01em;margin-bottom:6px}
#sheet label{display:block;font-size:12px;font-weight:700;color:var(--mute);margin:14px 0 6px;text-transform:uppercase;letter-spacing:.04em}
#sheet input{width:100%;font:inherit;font-size:16px;border:1px solid #d2d2d7;border-radius:12px;padding:12px 14px;outline:none}
.seg{display:flex;background:var(--soft);border-radius:11px;padding:3px}
.seg button{flex:1;padding:9px;border-radius:9px;font-size:14px;font-weight:600;color:var(--mute)}
.seg button.on{background:#fff;color:var(--ink);box-shadow:0 1px 3px rgba(0,0,0,.12)}
.big{display:block;width:100%;margin-top:18px;background:var(--ink);color:#fff;font-size:17px;font-weight:700;padding:16px;border-radius:14px}
.big.ghost{background:var(--soft);color:var(--ink);margin-top:10px}
.note{color:var(--faint);font-size:12.5px;text-align:center;margin-top:12px;line-height:1.4}

/* busy & toast */
#busy{position:fixed;inset:0;background:rgba(255,255,255,.75);backdrop-filter:blur(6px);z-index:40;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;font-weight:600}
.spin{width:34px;height:34px;border-radius:50%;border:3.5px solid #d1d1d6;border-top-color:var(--ink);animation:sp 1s linear infinite}
@keyframes sp{to{transform:rotate(360deg)}}
#toast{position:fixed;left:50%;top:calc(var(--st) + 64px);transform:translateX(-50%) translateY(10px);background:var(--ink);color:#fff;padding:11px 18px;border-radius:12px;font-weight:600;font-size:14px;opacity:0;pointer-events:none;transition:.25s;z-index:50;max-width:86vw;text-align:center}
#toast.show{opacity:1;transform:translateX(-50%)}