/* styles.css — LING PHOTOBOOTH · gradient mesh */
:root{
  --paper:#FAF6F0; --paper-2:#F3EDE4; --card:rgba(255,255,255,.55);
  --ink:#3D3632; --ink-2:#7A726A; --line:rgba(61,54,50,.10);
  --red:#D97A9B; --teal:#8FA3CC;
  --accent:#D97A9B; --accent-2:#E8B48C; --accent-3:#8FA3CC;
  --dark:#2B2624;
  --mono:"IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --sans:"Space Grotesk", system-ui, -apple-system, "Segoe UI", sans-serif;
  --serif:"DM Serif Display", Georgia, "Times New Roman", serif;
  --radius:20px;
  --shadow:0 8px 32px rgba(180,140,120,.22), 0 2px 8px rgba(80,66,58,.10);
}
*{box-sizing:border-box}
html,body{margin:0}
body{
  background:
    radial-gradient(ellipse 62% 52% at 12% 8%, rgba(232,162,180,.55), transparent 62%),
    radial-gradient(ellipse 56% 56% at 88% 18%, rgba(168,180,216,.50), transparent 62%),
    radial-gradient(ellipse 58% 50% at 8% 88%, rgba(232,180,140,.45), transparent 62%),
    radial-gradient(ellipse 50% 46% at 58% 108%, rgba(232,162,180,.35), transparent 60%),
    radial-gradient(ellipse 46% 42% at 96% 82%, rgba(143,163,204,.32), transparent 60%),
    linear-gradient(165deg, #FBF7F1 0%, #F5EFE6 52%, #EFE7DC 100%);
  background-attachment:fixed;
  color:var(--ink);
  font-family:var(--sans);
  font-size:15px; line-height:1.5;
  min-height:100vh;
}
:focus-visible{outline:2.5px solid var(--red); outline-offset:2px}
img{max-width:100%}
::selection{background:rgba(217,122,155,.35); color:#3D3632}

/* marquee bulbs + topbar */
.bulbs{display:flex; justify-content:space-between; gap:6px; background:rgba(255,255,255,.62); backdrop-filter:blur(14px); -webkit-backdrop-filter:blur(14px); padding:9px 16px; border-bottom:1px solid rgba(61,54,50,.10);}
.bulbs i{width:7px; height:7px; border-radius:50%; background:rgba(217,122,155,.40); animation:bulb 1.7s ease-in-out infinite;}
@keyframes bulb{0%,100%{background:rgba(217,122,155,.40); box-shadow:none}50%{background:#F6C9D6; box-shadow:0 0 12px 3px rgba(217,122,155,.55)}}
.topbar{display:flex; align-items:center; justify-content:space-between; gap:16px; flex-wrap:wrap;
  background:rgba(255,255,255,.55); backdrop-filter:blur(18px); -webkit-backdrop-filter:blur(18px); color:var(--ink); padding:16px 22px 20px; border-bottom:1px solid rgba(61,54,50,.12);}
.brand{display:flex; align-items:center; gap:14px; min-width:0;}
.brand-mark{width:44px; height:44px; border-radius:50%; background:linear-gradient(135deg,#E8A2B4,#A8B4D8); color:#fff;
  display:grid; place-items:center; font-size:19px; border:2px solid rgba(255,255,255,.65); box-shadow:0 0 0 2px rgba(217,122,155,.35), 0 0 22px rgba(217,122,155,.30); flex:none;}
.brand h1{font-family:var(--serif); font-size:clamp(22px,3vw,32px); margin:0; letter-spacing:.01em;}
.tagline{margin:2px 0 0; font-family:var(--mono); font-size:11px; color:var(--ink-2); letter-spacing:.07em; text-transform:uppercase;}
.top-actions{display:flex; align-items:center; gap:10px; flex-wrap:wrap;}
.live-dot{display:inline-flex; align-items:center; gap:7px; font-family:var(--mono); font-size:11px; color:#4A7BA6; letter-spacing:.1em;}
.live-dot i{width:8px; height:8px; border-radius:50%; background:var(--red); animation:pulse 1.2s infinite; box-shadow:0 0 10px rgba(217,122,155,.8);}
@keyframes pulse{50%{opacity:.25}}

/* buttons */
.btn{font-family:var(--mono); font-size:12.5px; font-weight:600; letter-spacing:.04em; text-transform:uppercase;
  background:rgba(255,255,255,.55); color:var(--ink); border:1px solid rgba(61,54,50,.14); border-radius:999px;
  padding:9px 14px; cursor:pointer; box-shadow:0 4px 18px rgba(140,110,95,.18);
  backdrop-filter:blur(10px); -webkit-backdrop-filter:blur(10px);
  transition:transform .12s ease, box-shadow .12s ease, background .12s ease;}
.btn:hover{transform:translateY(-1px); background:rgba(255,255,255,.75); box-shadow:0 8px 26px rgba(217,122,155,.30);}
.btn:active{transform:translateY(1px); box-shadow:0 2px 10px rgba(140,110,95,.22);}
.btn:disabled{opacity:.45; cursor:not-allowed; transform:none;}
.btn-primary{background:linear-gradient(135deg,#E8A2B4,#A8B4D8); color:#fff; border-color:transparent;
  box-shadow:0 6px 24px rgba(168,140,170,.45);}
.btn-primary:hover{background:linear-gradient(135deg,#EEB3C3,#B7C2E0); box-shadow:0 10px 30px rgba(217,122,155,.40);}
.btn-accent{background:linear-gradient(135deg,#E8B48C,#A8B4D8); color:#fff; border-color:transparent;
  box-shadow:0 6px 24px rgba(160,150,165,.40);}
.btn-small{padding:6px 10px; font-size:11px; box-shadow:0 3px 12px rgba(140,110,95,.18);}
.panel-dark .btn-small{background:rgba(255,255,255,.10); color:#F5EFE6; border-color:rgba(255,255,255,.20); box-shadow:0 3px 12px rgba(30,24,20,.35);}
.panel-dark .btn-small:hover{border-color:rgba(255,255,255,.45); box-shadow:0 6px 18px rgba(217,122,155,.30);}

/* layout */
.layout{display:grid; gap:16px; padding:18px 20px 8px;
  grid-template-columns:300px minmax(0,1fr) 336px;
  grid-template-areas:"source stage rail" "strip strip history";
  max-width:1580px; margin:0 auto; align-items:start;}
.panel{background:var(--card); border:1px solid var(--line); border-radius:var(--radius); box-shadow:var(--shadow);
  padding:14px; overflow:hidden;
  backdrop-filter:blur(18px); -webkit-backdrop-filter:blur(18px);}
.panel-dark{background:rgba(43,38,36,.72); color:#F5EFE6;
  backdrop-filter:blur(18px); -webkit-backdrop-filter:blur(18px);
  border:1px solid rgba(255,255,255,.14);}
#panelSource{grid-area:source} #panelStage{grid-area:stage} #panelRail{grid-area:rail}
#panelStrip{grid-area:strip} #panelHistory{grid-area:history}
.panel-head{display:flex; align-items:center; gap:10px; margin-bottom:12px;}
.panel-head .num{font-family:var(--mono); font-size:11px; font-weight:600; background:linear-gradient(135deg,#E8A2B4,#E8B48C); color:#fff; border-radius:999px; padding:2px 8px; flex:none; box-shadow:0 2px 10px rgba(217,122,155,.35);}
.panel-dark .panel-head .num{background:linear-gradient(135deg,#E8B48C,#A8B4D8);}
.panel-head h2{font-family:var(--serif); font-size:19px; margin:0; flex:none;}
.panel-head .hint{margin-left:auto; font-family:var(--mono); font-size:11px; color:var(--ink-2);
  overflow:hidden; text-overflow:ellipsis; white-space:nowrap; max-width:45%;}
.panel-dark .panel-head .hint{color:#C9BFB6;}
.head-actions{display:flex; gap:8px; margin-left:auto;}

/* viewfinder */
.viewfinder{position:relative; background:var(--dark); border:1px solid rgba(61,54,50,.14); border-radius:14px;
  aspect-ratio:4/5; min-height:280px; overflow:hidden; display:flex; align-items:center; justify-content:center;
  box-shadow:inset 0 0 0 1px rgba(217,122,155,.10), 0 10px 30px rgba(90,70,60,.22);}
.viewfinder video,.viewfinder #camStill{position:absolute; inset:0; width:100%; height:100%; object-fit:cover; transform:scaleX(-1);}
.vf-overlay{position:absolute; inset:0; pointer-events:none;}
.corner{position:absolute; width:22px; height:22px; border:2.5px solid rgba(245,239,230,.85);}
.corner.tl{top:10px; left:10px; border-right:0; border-bottom:0}
.corner.tr{top:10px; right:10px; border-left:0; border-bottom:0}
.corner.bl{bottom:10px; left:10px; border-right:0; border-top:0}
.corner.br{bottom:10px; right:10px; border-left:0; border-top:0}
.vf-empty{position:absolute; inset:0; display:grid; place-items:center; text-align:center;
  color:#A89C92; font-family:var(--mono); font-size:12px; padding:24px;
  background:repeating-linear-gradient(45deg, rgba(232,162,180,.08) 0 14px, rgba(168,180,216,.06) 14px 28px);}
.vf-empty[hidden]{display:none!important}
.countdown{position:absolute; inset:0; display:grid; place-items:center;
  font-family:var(--serif); font-size:120px; color:var(--paper); text-shadow:0 6px 30px rgba(0,0,0,.5);}
.countdown[hidden]{display:none!important}
.countdown.pop{animation:pop .6s ease-out;}
@keyframes pop{0%{transform:scale(1.4); opacity:0}30%{opacity:1}100%{transform:scale(1)}}
.flash{position:absolute; inset:0; background:#fff; opacity:0;}
.flash.go{animation:flash .5s ease-out;}
@keyframes flash{0%{opacity:.95}100%{opacity:0}}
.viewfinder.drop-hint-on{outline:3px dashed var(--accent); outline-offset:4px;}
.source-controls{display:grid; grid-template-columns:1fr 1fr; gap:8px; margin-top:12px;}
.source-controls .btn{width:100%;}
.source-controls .btn-wide{grid-column:1/-1;}
.drop-hint{margin:10px 2px 0; font-family:var(--mono); font-size:11px; color:var(--ink-2); text-align:center;}
.source-meta{margin:6px 2px 0; font-family:var(--mono); font-size:11px; color:var(--ink-2); text-align:center;
  border-top:1px dashed var(--line); padding-top:8px; overflow:hidden; text-overflow:ellipsis; white-space:nowrap;}

/* stage + compare */
.stage{position:relative; background:var(--dark); border:1px solid rgba(61,54,50,.14); border-radius:14px;
  min-height:460px; display:flex; align-items:center; justify-content:center; padding:16px; overflow:hidden; touch-action:pan-y;
  box-shadow:inset 0 0 0 1px rgba(217,122,155,.10), 0 10px 30px rgba(90,70,60,.22);}
.compare{position:relative; line-height:0; max-width:100%;}
.compare canvas{max-width:100%; max-height:62vh; width:auto; height:auto; border-radius:6px;}
.top-layer{position:absolute; inset:0; line-height:0; will-change:clip-path;}
.top-layer canvas{width:100%; height:100%;}
.compare-handle{position:absolute; top:-6px; bottom:-6px; width:0; border-left:2.5px dashed rgba(245,239,230,.9); pointer-events:none;}
.compare-handle span{position:absolute; top:50%; left:0; transform:translate(-50%,-50%);
  width:34px; height:34px; border-radius:50%; background:linear-gradient(135deg,#E8A2B4,#A8B4D8); color:#fff;
  display:grid; place-items:center; font-size:15px; border:2px solid rgba(255,255,255,.65);
  box-shadow:0 4px 16px rgba(168,140,170,.55);}
.stage-actions{display:flex; flex-wrap:wrap; gap:8px; margin-top:12px;}
.kbd-hint{margin:10px 2px 0; font-family:var(--mono); font-size:10.5px; color:var(--ink-2); letter-spacing:.03em;}
kbd{font-family:var(--mono); font-size:9.5px; background:rgba(255,255,255,.1); border:1px solid var(--line);
  border-bottom-width:2px; border-radius:6px; padding:1px 4px; color:var(--ink-2);}

/* filter rail */
.filter-grid{display:grid; grid-template-columns:repeat(3,1fr); gap:10px;
  max-height:590px; overflow-y:auto; padding:2px 4px 2px 2px; align-content:start;}
.filter-tile{position:relative; background:rgba(255,255,255,.50); border:1px solid var(--line); border-radius:12px;
  padding:6px; cursor:pointer; text-align:left; font-family:inherit;
  backdrop-filter:blur(10px); -webkit-backdrop-filter:blur(10px);
  transition:transform .12s ease, box-shadow .12s ease, border-color .12s;}
.filter-tile:hover{transform:translateY(-2px); box-shadow:0 10px 22px -8px rgba(190,150,140,.45); border-color:rgba(61,54,50,.25);}
.filter-tile.active{border-color:var(--accent); box-shadow:0 0 0 2px var(--accent), 0 10px 22px -8px rgba(217,122,155,.45);}
.filter-tile canvas{width:100%; aspect-ratio:1; object-fit:cover; border-radius:8px; display:block; background:#E8E0D6;}
.ft-meta{display:flex; align-items:baseline; gap:6px; margin-top:6px; min-width:0;}
.ft-name{font-weight:600; font-size:12px; overflow:hidden; text-overflow:ellipsis; white-space:nowrap;}
.ft-tag{margin-left:auto; font-family:var(--mono); font-size:9px; color:var(--ink-2); letter-spacing:.08em; flex:none;}
.filter-tile kbd{position:absolute; top:4px; right:4px; opacity:.85;}
.filter-grid::-webkit-scrollbar{width:8px}
.filter-grid::-webkit-scrollbar-thumb{background:rgba(61,54,50,.18); border-radius:4px}

/* strip + history */
.strip-wrap{position:relative; display:flex; justify-content:center; padding:6px 2px;}
#stripCanvas{max-width:100%; height:auto; border-radius:10px; box-shadow:0 18px 44px -16px rgba(60,48,40,.45), 0 0 0 1px rgba(255,255,255,.18);}
.strip-empty{border:1.5px dashed rgba(255,255,255,.35); color:#C9BFB6; border-radius:12px;
  padding:26px 20px; text-align:center; font-family:var(--mono); font-size:12px; width:100%;
  background:rgba(255,255,255,.06);}
.history-row{display:flex; gap:10px; overflow-x:auto; padding:2px;}
.history-empty{color:var(--ink-2); font-family:var(--mono); font-size:11.5px; padding:18px 6px;}
.history-item{flex:none; width:92px; background:rgba(255,255,255,.55); border:1px solid var(--line); border-radius:10px;
  padding:5px 5px 4px; cursor:pointer; box-shadow:0 4px 14px rgba(140,110,95,.22); transition:transform .12s ease; font-family:inherit;
  backdrop-filter:blur(10px); -webkit-backdrop-filter:blur(10px);}
.history-item:hover{transform:translateY(-3px) rotate(-1deg); box-shadow:0 8px 22px rgba(217,122,155,.35); border-color:rgba(61,54,50,.28);}
.history-item img{width:100%; aspect-ratio:1; object-fit:cover; border-radius:6px; display:block;}
.history-item span{display:block; font-family:var(--mono); font-size:9px; color:var(--ink-2); margin-top:3px;
  overflow:hidden; text-overflow:ellipsis; white-space:nowrap;}
.history-row::-webkit-scrollbar{height:8px}
.history-row::-webkit-scrollbar-thumb{background:rgba(61,54,50,.18); border-radius:4px}

/* footer + toasts */
.footer{max-width:1580px; margin:0 auto; padding:14px 22px 26px; color:var(--ink-2);
  font-family:var(--mono); font-size:11px; display:flex; justify-content:space-between; gap:12px; flex-wrap:wrap;}
.toasts{position:fixed; bottom:18px; left:50%; transform:translateX(-50%); display:flex; flex-direction:column;
  gap:8px; z-index:50; align-items:center;}
.toast{background:rgba(61,54,50,.85); color:#F5EFE6; font-family:var(--mono); font-size:12.5px;
  padding:10px 16px; border-radius:999px; border:1px solid rgba(255,255,255,.16); border-left:4px solid var(--teal);
  opacity:0; transform:translateY(8px); transition:all .25s ease;
  backdrop-filter:blur(14px); -webkit-backdrop-filter:blur(14px);
  box-shadow:0 12px 32px -8px rgba(143,163,204,.40), 0 4px 14px rgba(60,48,40,.35); max-width:min(90vw,480px);}
.toast.show{opacity:1; transform:none;}
.toast.err{border-left-color:var(--red);}

/* responsive */
@media (max-width:1180px){
  .layout{grid-template-columns:280px minmax(0,1fr);
    grid-template-areas:"source stage" "rail rail" "strip strip" "history history";}
  .filter-grid{grid-template-columns:repeat(5,1fr); max-height:none;}
}
@media (max-width:760px){
  .layout{grid-template-columns:minmax(0,1fr);
    grid-template-areas:"source" "stage" "rail" "strip" "history"; padding:12px;}
  .stage{min-height:320px;}
  .filter-grid{grid-template-columns:repeat(3,1fr);}
  .compare canvas{max-height:52vh;}
  .topbar{padding:14px 16px;}
}