/* Layout: one centered workbench — upload → pick format → results → supported formats */
:root{
  --bg:#f3f5f7; --panel:#ffffff; --fg:#17202a; --muted:#5d6b78;
  --line:#d9e0e6; --accent:#1f6feb; --accent-fg:#ffffff; --ok:#1a7f4b; --err:#c0392b;
  --font:"IBM Plex Sans KR","Apple SD Gothic Neo","Malgun Gothic","Hiragino Sans","Yu Gothic","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  color-scheme:light;
}
@media (prefers-color-scheme:dark){
  :root{ --bg:#11161c; --panel:#1a2129; --fg:#e8edf2; --muted:#9aa8b5;
    --line:#2c3743; --accent:#5b9dff; --accent-fg:#0b1220; --ok:#4cc98a; --err:#ff7b6b; color-scheme:dark; }
}
*{box-sizing:border-box}
[hidden]{display:none!important}
body{margin:0;background:var(--bg);color:var(--fg);font-family:var(--font);font-size:15px;line-height:1.6}
.wrap{max-width:720px;margin:0 auto;padding-inline:16px;padding-block:32px 48px;display:flex;flex-direction:column;gap:20px}
.wrap>header{display:flex;flex-wrap:wrap;gap:12px;align-items:flex-start;justify-content:space-between}
.wrap>header>div{min-width:0;flex:1 1 280px}
.wrap>header h1{margin:0;font-size:1.7rem;font-weight:700;letter-spacing:-.01em;text-wrap:balance}
.wrap>header p{margin:4px 0 0;color:var(--muted)}
.panel{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:20px;display:flex;flex-direction:column;gap:16px}
.drop{border:2px dashed var(--line);border-radius:10px;padding:32px 16px;text-align:center;cursor:pointer;transition:border-color .15s,background .15s}
.drop:hover,.drop.over{border-color:var(--accent);background:color-mix(in srgb,var(--accent) 6%,transparent)}
.drop strong{display:block;font-size:1.05rem;text-wrap:balance;word-break:auto-phrase}
.drop span{display:block;text-wrap:balance;word-break:auto-phrase}
.drop span{color:var(--muted);font-size:.9rem}
.row{display:flex;flex-wrap:wrap;gap:12px;align-items:center}
.label{font-size:.85rem;color:var(--muted);font-weight:500;min-width:56px}
select{font:inherit;color:var(--fg);background:var(--panel);border:1px solid var(--line);border-radius:8px;padding:8px 12px;min-width:0;max-width:100%}
input[type=range]{flex:1;min-width:140px;accent-color:var(--accent)}
.q{font-variant-numeric:tabular-nums;min-width:40px;text-align:right}
.check{display:flex;gap:8px;align-items:center;font-size:.95rem}
.check input{width:18px;height:18px;accent-color:var(--accent)}
.btn{border:0;border-radius:8px;background:var(--accent);color:var(--accent-fg);font:inherit;font-weight:500;padding:12px 20px;cursor:pointer;text-decoration:none;display:inline-block;text-align:center}
.btn:disabled{opacity:.45;cursor:not-allowed}
.btn.ghost{background:transparent;color:var(--accent);border:1px solid var(--accent);padding:8px 14px}
button:focus-visible,a:focus-visible,select:focus-visible,.drop:focus-visible{outline:3px solid var(--accent);outline-offset:2px}
.list{display:flex;flex-direction:column;gap:10px;margin:0;padding:0;list-style:none}
.item{display:flex;gap:12px;align-items:center;padding:10px;border:1px solid var(--line);border-radius:10px}
.thumb{width:56px;height:56px;object-fit:contain;border-radius:6px;background:var(--bg);flex-shrink:0;display:grid;place-items:center;font-size:.75rem;font-weight:700;color:var(--muted);text-transform:uppercase}
.meta{flex:1;min-width:0}
.name{font-weight:500;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.size{font-size:.85rem;color:var(--muted);font-variant-numeric:tabular-nums}
.size b{color:var(--ok);font-weight:500}
.size.err{color:var(--err)}
.acts{display:flex;gap:6px;flex-wrap:wrap}
.empty{color:var(--muted);text-align:center;margin:0;font-size:.9rem}
.note{font-size:.85rem;color:var(--muted);margin:0}
.info h2{margin:0;font-size:1.05rem}
.info h3{margin:0 0 4px;font-size:.9rem;color:var(--muted);font-weight:500}
.chips{display:flex;flex-wrap:wrap;gap:6px}
.chips span{font-size:.8rem;padding:2px 8px;border-radius:999px;border:1px solid var(--line);font-variant-numeric:tabular-nums}
.chips.no span{color:var(--muted);text-decoration:line-through}
footer{font-size:.8rem;color:var(--muted);text-align:center}
@media (max-width:480px){ .item{flex-wrap:wrap} .acts{width:100%} .acts .btn{flex:1} }
@media (prefers-reduced-motion:reduce){*{transition:none!important}}

/* Long-form pages (guide, about, privacy, contact) */
.doc{max-width:720px;margin:0 auto;padding-inline:16px;padding-block:32px 16px}
.doc article{display:flex;flex-direction:column;gap:14px}
.doc h1{margin:0;font-size:1.8rem;line-height:1.3;letter-spacing:-.01em;text-wrap:balance}
.doc .lede{margin:0;color:var(--muted);font-size:1.02rem}
.doc h2{margin:22px 0 0;font-size:1.25rem;line-height:1.35;text-wrap:balance}
.doc h3{margin:12px 0 0;font-size:1.02rem}
.doc p,.doc li{max-width:65ch}
.doc p{margin:0}
.doc ol,.doc ul{margin:0;padding-left:1.3em;display:flex;flex-direction:column;gap:6px}
.doc a{color:var(--accent)}
.doc table{border-collapse:collapse;font-size:.9rem;width:100%}
.doc th,.doc td{border:1px solid var(--line);padding:6px 10px;text-align:left;vertical-align:top}
.doc th{background:var(--panel)}
.doc .tablewrap{overflow-x:auto}
.doc .callout{background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:14px 16px}
.doc .toc{background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:14px 16px}
.doc .toc ol{gap:2px}
.doc .meta{font-size:.85rem;color:var(--muted)}
.cta{display:inline-block;background:var(--accent);color:var(--accent-fg)!important;text-decoration:none;border-radius:8px;padding:10px 16px;font-weight:500}
.bar{height:6px;border-radius:99px;background:var(--line);overflow:hidden}
.bar>i{display:block;height:100%;width:0;background:var(--accent);transition:width .2s}