:root{
  --bg:#f4f5f8; --panel:#fff; --fg:#1d2330; --muted:#5b6475; --line:#d9dde6; --accent:#2563eb; --accent-fg:#fff;
  --warn-bg:#fff7e6; --warn-fg:#7a4b00; --bad-bg:#fde8e8; --bad-fg:#9b1c1c; --stage:#2a2d33;
  font:14px/1.55 -apple-system,BlinkMacSystemFont,"Segoe UI","Hiragino Sans","BIZ UDPGothic","Yu Gothic UI",Meiryo,sans-serif;
  color-scheme:light;
}
@media (prefers-color-scheme: dark){
  :root{ --bg:#16181d; --panel:#20232a; --fg:#e8eaf0; --muted:#a3abbb; --line:#363a44; --accent:#5b8cff; --accent-fg:#fff;
    --warn-bg:#3b2d10; --warn-fg:#f5d38a; --bad-bg:#3a1d1d; --bad-fg:#fcc; --stage:#0f1013; color-scheme:dark; }
}
*{box-sizing:border-box}
[hidden]{display:none!important}
html,body{margin:0;height:100%;background:var(--bg);color:var(--fg)}
body{display:flex;flex-direction:column}
button,select,input{font:inherit;color:inherit}
button{border:1px solid var(--line);background:var(--panel);border-radius:7px;padding:5px 11px;cursor:pointer;white-space:nowrap}
button:hover{border-color:var(--accent)}
button:focus-visible,select:focus-visible,input:focus-visible,.drop:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
button.pri{background:var(--accent);border-color:var(--accent);color:var(--accent-fg)}
button.ghost{border-color:transparent;background:transparent;color:var(--muted)}
button.on{background:var(--accent);border-color:var(--accent);color:var(--accent-fg)}
button.warn{background:var(--warn-bg);color:var(--warn-fg);border-color:transparent}
button:disabled{opacity:.5;cursor:default}

#top{display:flex;align-items:center;gap:12px;padding:8px 14px;background:var(--panel);border-bottom:1px solid var(--line);flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:8px;font-weight:700}
.logo{display:inline-grid;place-items:center;width:24px;height:24px;border-radius:6px;background:var(--accent);color:#fff;font-size:12px}
.deckname{color:var(--muted);font-size:13px;max-width:20vw;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
#tools{display:flex;align-items:center;gap:6px;margin-left:auto;flex-wrap:wrap}
#tools .sep{width:1px;height:20px;background:var(--line);margin:0 2px}
#tools button{padding:4px 8px;font-size:13px}

main{flex:1;min-height:0;display:flex}
#welcome{flex:1;overflow:auto;padding:36px 16px 24px;display:flex;flex-direction:column;align-items:center;gap:18px}
#welcome .intro{max-width:720px;text-align:center}
#welcome h1{font-size:26px;margin:0 0 6px}
#welcome .intro p{color:var(--muted);margin:0}
.drop{width:min(720px,100%);border:2px dashed var(--line);border-radius:14px;padding:30px 20px;text-align:center;background:var(--panel)}
.drop.over{border-color:var(--accent);background:color-mix(in srgb,var(--accent) 8%,var(--panel))}
.drop-icon{font-size:34px}
.row{display:flex;gap:10px;justify-content:center;margin-top:14px;flex-wrap:wrap}
.card{width:min(720px,100%);background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:16px 18px}
.card h2{font-size:16px;margin:0 0 10px}
.card label{display:flex;gap:10px;align-items:center;margin:8px 0}
.card label span{min-width:9em;color:var(--muted)}
.card input,.card select{flex:1;padding:6px 8px;border:1px solid var(--line);border-radius:7px;background:var(--bg)}
.card .hint{color:var(--muted);font-size:13px}
#recent-list{list-style:none;margin:0;padding:0}
#recent-list li{display:flex;align-items:center;gap:8px;padding:6px 4px;border-top:1px solid var(--line)}
#recent-list li:first-child{border-top:0}
#recent-list .nm{flex:1;font-weight:600;overflow:hidden;text-overflow:ellipsis}
#recent-list .when{color:var(--muted);font-size:12px}
.note{width:min(720px,100%);color:var(--muted);font-size:12.5px;margin:0}
.note.bad{background:var(--bad-bg);color:var(--bad-fg);padding:10px 14px;border-radius:10px;font-size:14px}

#deck{flex:1;min-height:0;display:flex}
#viewer{flex:1;min-width:0;position:relative;background:var(--stage)}
#preview{position:absolute;inset:0;width:100%;height:100%;border:0;background:var(--stage)}
#loading{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);color:#ccd;display:none}
#viewer.busy #loading{display:block}
#errbox{position:absolute;inset:0;background:rgba(20,8,8,.82);display:flex;align-items:flex-start;justify-content:center;overflow:auto;padding:40px 16px}
#errbox[hidden]{display:none}
.errcard{max-width:900px;width:100%;background:#3a2222;color:#fdd;border:1px solid #a44;border-radius:10px;padding:20px 24px}
.errcard h2{margin:0 0 8px;color:#fff;font-size:19px}
.errcard p{color:#dbb;margin:0 0 10px}
.errcard pre{white-space:pre-wrap;font:13px/1.5 ui-monospace,SFMono-Regular,Menlo,monospace;color:#fcc;margin:0}
#panel{width:380px;max-width:45vw;background:var(--panel);border-left:1px solid var(--line);display:flex;flex-direction:column;min-height:0}
#panel[hidden]{display:none}
.panel-head{display:flex;align-items:center;padding:10px 12px;border-bottom:1px solid var(--line)}
.sp{flex:1}
#panel-body{overflow:auto;padding:10px 14px 16px;font-size:13.5px}
#panel-body h3{font-size:14px;margin:14px 0 6px}
#panel-body ul{margin:0;padding-left:18px}
#panel-body kbd{display:inline-block;padding:0 5px;border:1px solid var(--line);border-radius:4px;font:600 12px/1.5 ui-monospace,Menlo,monospace}
.res{border:1px solid var(--line);border-radius:8px;padding:6px 9px;margin:6px 0;cursor:pointer}
.res:hover{border-color:var(--accent)}
.res .sev{font-size:11px;font-weight:700;border-radius:999px;padding:0 7px;margin-right:6px}
.res.error .sev{background:var(--bad-bg);color:var(--bad-fg)}
.res.warn .sev{background:var(--warn-bg);color:var(--warn-fg)}
.res .where{color:var(--muted);font-size:12px}
.sum{padding:8px 10px;border-radius:8px;background:var(--bg);margin-bottom:8px}
#status{display:flex;gap:12px;padding:3px 14px;font-size:12px;color:var(--muted);background:var(--panel);border-top:1px solid var(--line)}
#toast{position:fixed;left:50%;bottom:34px;transform:translateX(-50%);background:#1d2330;color:#fff;padding:8px 16px;border-radius:8px;font-size:13.5px;box-shadow:0 4px 18px rgba(0,0,0,.35);display:none;max-width:80vw;z-index:10}
#toast.show{display:block}
#toast.bad{background:#9b1c1c}
@media (max-width:720px){ #panel{position:absolute;right:0;top:0;bottom:0;max-width:100vw;width:100%;z-index:5} #deck{position:relative} }
#b-lang{margin-left:auto;border:1px solid var(--line);font-size:13px;padding:4px 10px}
#tools:not([hidden]) ~ #b-lang{margin-left:8px}
#notice{background:var(--warn-bg);color:var(--warn-fg);border-bottom:1px solid var(--line);padding:6px 14px;font-size:13.5px}
#notice p{margin:2px 0}
#dlg{border:1px solid var(--line);border-radius:12px;background:var(--panel);color:var(--fg);padding:18px 22px;width:min(560px,92vw);box-shadow:0 10px 40px rgba(0,0,0,.35)}
#dlg::backdrop{background:rgba(10,12,16,.45)}
#dlg.warn{border-color:var(--bad-fg)}
#dlg h2{font-size:17px;margin:0 0 10px}
#dlg .row{justify-content:flex-end}
#dlg dl{display:grid;grid-template-columns:max-content 1fr;gap:4px 12px;margin:10px 0}
#dlg dt{color:var(--muted)}
#dlg dd{margin:0;overflow-wrap:anywhere}
#dlg .note{width:auto}
#dlg .hint{color:var(--muted);font-size:12.5px;margin:6px 0}
#dlg .confirm{display:flex;gap:8px;align-items:flex-start;margin:10px 0}
#dlg pre.tech{white-space:pre-wrap;font:12px/1.5 ui-monospace,Menlo,monospace;color:var(--muted);background:var(--bg);padding:8px 10px;border-radius:8px;max-height:30vh;overflow:auto}
/* 道具の列の一覧（「開く ▾」「保存 ▾」「書き出す ▾」）：まとめて、1280 px 以上で 1 行に収める */
.menu{position:relative;display:inline-flex}
.menu[hidden]{display:none}
.menu-list{position:absolute;right:0;top:calc(100% + 4px);z-index:20;display:flex;flex-direction:column;gap:2px;min-width:220px;padding:5px;background:var(--panel);border:1px solid var(--line);border-radius:9px;box-shadow:0 8px 28px rgba(0,0,0,.28)}
#m-open{left:0;right:auto}
.menu-list[hidden]{display:none}
.menu-list button{text-align:left;border-color:transparent;background:transparent;padding:6px 10px}
.menu-list button:hover,.menu-list button:focus-visible{background:var(--bg);border-color:var(--line)}
.menu button[aria-expanded="true"]{border-color:var(--accent)}
.split > #b-save{border-top-right-radius:0;border-bottom-right-radius:0}
.split > .split-arrow{border-top-left-radius:0;border-bottom-left-radius:0;margin-left:-1px;padding-left:6px;padding-right:6px}
.split > #b-save.pri + .split-arrow{background:var(--accent);border-color:var(--accent);border-left-color:rgba(255,255,255,.5);color:var(--accent-fg)}
/* デッキを開いている間は、名前の欄が縮み（…で切る）、1440 px より狭ければ題字は印だけにする */
@media (max-width:1439px){ #top.has-deck .brand [data-t="brand"]{display:none} }
#top.has-deck .deckname{flex:1 1 auto;min-width:60px;max-width:none}
#top.has-deck .brand{flex:none;white-space:nowrap}
@media (min-width:1280px){ #top.has-deck, #top.has-deck #tools{flex-wrap:nowrap} }