:root{
  --bg:#0a0b0d; --bg2:#101216; --surface:#15181d; --line:#262a31; --line2:#3a3f48;
  --text:#e9ebee; --muted:#8c939d; --dim:#5d636c;
  --accent:#ff5a1f; --accent-soft:rgba(255,90,31,.14); --danger:#ff4d4d;
  --f-disp:"Barlow Condensed","Noto Sans JP",sans-serif;
  --f-mono:"JetBrains Mono",ui-monospace,monospace;
  --f-body:"Noto Sans JP",system-ui,sans-serif;
  --gut:16px;
}
@media (min-width:768px){:root{--gut:28px}}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--text);font:400 14px/1.6 var(--f-body);-webkit-font-smoothing:antialiased}
[hidden]{display:none!important}
button,input{font:inherit;color:inherit}
button{cursor:pointer}
a{color:inherit;text-decoration:none}
svg{width:1em;height:1em;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:square;flex:none}

.brand{display:flex;align-items:center;gap:10px;font:700 20px/1 var(--f-disp);letter-spacing:.14em;white-space:nowrap}
.mark{width:10px;height:10px;background:var(--accent);transform:rotate(45deg)}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:38px;padding:0 14px;border:1px solid var(--line2);
  background:transparent;font:500 13px/1 var(--f-body);color:var(--text);transition:all .15s;white-space:nowrap}
.btn:hover{border-color:var(--text)}
.btn svg{font-size:16px}
.btn.primary{background:var(--accent);border-color:var(--accent);color:#fff;font-weight:700}
.btn.primary:hover{filter:brightness(1.1)}
.btn.danger{border-color:rgba(255,77,77,.5);color:#ff8d8d}
.btn.danger:hover{background:var(--danger);border-color:var(--danger);color:#fff}
.btn.ghost{border-color:transparent;color:var(--muted)}
.btn.ghost:hover{color:var(--text);border-color:var(--line2)}
.btn:disabled{opacity:.45;cursor:default}

/* login */
.login{min-height:100svh;display:grid;place-items:center;padding:var(--gut)}
.login-box{width:min(360px,100%);display:grid;gap:14px;padding:28px;border:1px solid var(--line);background:var(--surface)}
.login-box .brand{justify-content:center;margin-bottom:6px;font-size:26px}
.login-note{margin:0;text-align:center;color:var(--muted);font-size:13px}
.login-box input{height:44px;padding:0 12px;background:var(--bg);border:1px solid var(--line2);font:500 14px var(--f-mono);letter-spacing:.1em}
.login-box input:focus{outline:none;border-color:var(--accent)}
.err{margin:0;color:#ff8d8d;font-size:13px;text-align:center}

/* top bar */
.bar{position:sticky;top:0;z-index:30;background:rgba(10,11,13,.92);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--line);
  padding-top:env(safe-area-inset-top)}
.bar-in{display:flex;align-items:center;gap:10px;flex-wrap:wrap;padding:10px var(--gut)}
.stats{font:400 11px/1.3 var(--f-mono);letter-spacing:.1em;color:var(--muted);margin-right:auto;padding-left:6px}
.stats b{color:var(--text);font-weight:500}
.search{height:38px;width:200px;padding:0 12px;background:var(--bg);border:1px solid var(--line2);font-size:13px}
.search:focus{outline:none;border-color:var(--accent)}
@media (max-width:640px){.bar-in{gap:8px}.stats{order:5;width:100%;padding:0}.search{order:6;width:100%}.btn.primary span{display:none}}
.selbar{display:flex;align-items:center;gap:8px;flex-wrap:wrap;padding:8px var(--gut);border-top:1px solid var(--line);background:var(--accent-soft)}
.selbar #selcount{margin-right:auto;font:500 12px var(--f-mono);letter-spacing:.08em}

/* grid */
.wrap{padding:var(--gut)}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:8px}
@media (min-width:768px){.grid{grid-template-columns:repeat(auto-fill,minmax(190px,1fr));gap:12px}}
.tile{position:relative;aspect-ratio:1;background:var(--surface);overflow:hidden;cursor:pointer;border:0;padding:0;display:block;width:100%}
.tile img{width:100%;height:100%;object-fit:cover;transition:transform .5s cubic-bezier(.2,.7,.2,1),opacity .3s}
.tile:hover img{transform:scale(1.05)}
.tile::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(0,0,0,0) 55%,rgba(0,0,0,.75));opacity:0;transition:opacity .2s}
.tile:hover::after,.tile:focus-visible::after{opacity:1}
.tile .cap{position:absolute;left:8px;right:8px;bottom:6px;z-index:1;text-align:left;opacity:0;transition:opacity .2s;pointer-events:none}
.tile:hover .cap,.tile:focus-visible .cap{opacity:1}
.tile .cap b{display:block;font:500 11px/1.3 var(--f-body);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.tile .cap i{font:400 10px/1.3 var(--f-mono);font-style:normal;color:#c2c6cc}
.tile .chk{position:absolute;top:8px;left:8px;z-index:2;width:22px;height:22px;border:2px solid #fff;background:rgba(0,0,0,.35);display:none;place-items:center}
.tile .chk svg{font-size:14px;stroke:#fff;stroke-width:3;opacity:0}
.sel-mode .tile .chk{display:grid}
.tile.sel{outline:3px solid var(--accent);outline-offset:-3px}
.tile.sel .chk{background:var(--accent);border-color:var(--accent)}
.tile.sel .chk svg{opacity:1}
.tile.new{animation:pop .5s ease-out}
@keyframes pop{from{opacity:0;transform:scale(.9)}}
.more{display:flex;justify-content:center;margin:24px 0 8px}
.empty{display:grid;place-items:center;gap:6px;padding:80px 16px;text-align:center;color:var(--muted)}
.empty svg{font-size:56px;color:var(--dim);margin-bottom:8px}
.empty p{margin:0;font-size:16px;color:var(--text)}
.empty .sub{font-size:13px;color:var(--muted)}

/* upload tray */
.tray{position:fixed;right:var(--gut);bottom:calc(var(--gut) + env(safe-area-inset-bottom));z-index:40;width:min(340px,calc(100vw - 2*var(--gut)));
  max-height:50svh;overflow:auto;background:var(--surface);border:1px solid var(--line2);box-shadow:0 12px 40px rgba(0,0,0,.5)}
.tray-head{display:flex;align-items:center;justify-content:space-between;padding:10px 12px;border-bottom:1px solid var(--line);font:500 11px var(--f-mono);letter-spacing:.12em;color:var(--muted)}
.tray-head button{background:none;border:0;color:var(--muted);font-size:16px;line-height:1}
.up{padding:8px 12px;border-bottom:1px solid var(--line);display:grid;gap:5px}
.up:last-child{border:0}
.up-row{display:flex;gap:8px;justify-content:space-between;font-size:12px}
.up-name{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.up-st{font:400 11px var(--f-mono);color:var(--muted);flex:none}
.up.err .up-st{color:#ff8d8d}
.up.done .up-st{color:#7bd88f}
.up-bar{height:3px;background:var(--line)}
.up-bar i{display:block;height:100%;width:0;background:var(--accent);transition:width .15s}
.up.done .up-bar i{background:#7bd88f}
.up.err .up-bar i{background:var(--danger)}

/* drag & drop */
.drop{position:fixed;inset:0;z-index:60;background:rgba(10,11,13,.86);display:grid;place-items:center;pointer-events:none}
.drop div{padding:48px 64px;border:2px dashed var(--accent);font:700 28px var(--f-disp);letter-spacing:.14em;color:var(--accent)}

/* viewer */
.lb{position:fixed;inset:0;z-index:100;background:#050607;display:grid;grid-template-columns:1fr 320px}
@media (max-width:860px){.lb{grid-template-columns:1fr;grid-template-rows:1fr auto}}
.lb-stage{display:grid;place-items:center;min-width:0;min-height:0;padding:56px 56px 24px}
@media (max-width:860px){.lb-stage{padding:48px 8px 8px}}
.lb-stage img{max-width:100%;max-height:100%;object-fit:contain;background:
  conic-gradient(#14161a 25%,#101216 0 50%,#14161a 0 75%,#101216 0) 0 0/20px 20px}
.lb-side{padding:56px 20px 20px;border-left:1px solid var(--line);background:var(--bg2);overflow:auto;display:flex;flex-direction:column;gap:14px}
@media (max-width:860px){.lb-side{border-left:0;border-top:1px solid var(--line);padding:14px var(--gut) calc(14px + env(safe-area-inset-bottom));max-height:42svh}}
.lb-name{font:700 18px/1.4 var(--f-body);word-break:break-all}
.lb-meta{margin:0;display:grid;gap:0;border-top:1px solid var(--line)}
.lb-meta div{display:grid;grid-template-columns:72px 1fr;gap:10px;padding:7px 0;border-bottom:1px solid var(--line)}
.lb-meta dt{font:500 11px/1.8 var(--f-mono);letter-spacing:.14em;color:var(--accent)}
.lb-meta dd{margin:0;font:400 12px/1.8 var(--f-mono)}
.lb-urllabel{font:500 11px var(--f-mono);letter-spacing:.14em;color:var(--accent)}
.lb-url{display:flex;gap:6px}
.lb-url input{flex:1;min-width:0;height:38px;padding:0 10px;background:var(--bg);border:1px solid var(--line2);font:400 12px var(--f-mono)}
.lb-actions{display:flex;flex-wrap:wrap;gap:8px}
.lb-btn{position:absolute;display:grid;place-items:center;width:48px;height:48px;background:none;border:0;color:#fff;opacity:.75}
.lb-btn:hover{opacity:1}
.lb-btn svg{font-size:26px}
.lb-close{top:calc(4px + env(safe-area-inset-top));right:4px}
.lb-prev,.lb-next{top:calc(50% - 24px)}
.lb-prev{left:4px}
.lb-next{right:324px}
@media (max-width:860px){.lb-next{right:4px}.lb-prev,.lb-next{top:30%}}
@media (hover:none){.lb-prev,.lb-next{display:none}}
.lb-close{right:324px}
@media (max-width:860px){.lb-close{right:4px}}

/* confirm + toast */
.modal{position:fixed;inset:0;z-index:120;background:rgba(0,0,0,.7);display:grid;place-items:center;padding:var(--gut)}
.modal-box{width:min(420px,100%);padding:24px;background:var(--surface);border:1px solid var(--line2)}
.modal-box h2{margin:0 0 8px;font:700 22px var(--f-disp);letter-spacing:.06em}
.modal-box p{margin:0 0 20px;color:var(--muted)}
.modal-actions{display:flex;gap:8px;justify-content:flex-end}
.toast{position:fixed;left:50%;bottom:calc(24px + env(safe-area-inset-bottom));transform:translateX(-50%);z-index:130;padding:10px 18px;background:#fff;color:#111;
  font:500 13px var(--f-body);box-shadow:0 8px 30px rgba(0,0,0,.5);max-width:calc(100vw - 32px)}
.toast.bad{background:var(--danger);color:#fff}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}