:root{
  --bg:#f5f4f0; --surface:#fbfbf9; --panel:#ffffff; --panel-soft:#f7f6f2;
  --ink:#1c1c1a; --ink-hover:#3a3935; --ink-2:#55534d; --sub:#7a776f; --muted:#8a877f;
  --line:#e3e1db; --line-2:#dcdad3; --line-3:#efeee9; --hover:#efeee9; --soft:#f3f2ee; --track:#ebe9e3;
  --accent:#2b59ff; --accent-soft:#e8edff; --good:#1f9d63; --bad:#d4483b;
  --font:"IBM Plex Sans KR",sans-serif; --mono:"JetBrains Mono",monospace;
}
*{box-sizing:border-box}
[hidden]{display:none !important}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--font);-webkit-font-smoothing:antialiased}
button{font:inherit;color:inherit}
.mono-label{font-family:var(--mono);font-size:11px;letter-spacing:.12em;color:var(--muted)}
.app{min-height:calc(100vh - 48px);display:flex;flex-direction:column}
.topbar{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:16px 28px;border-bottom:1px solid var(--line);background:var(--surface);flex-wrap:wrap}
.brand{display:flex;align-items:baseline;gap:14px;min-width:0;flex-wrap:wrap}
.home{font-size:13px;color:var(--ink-2);text-decoration:none}
.home:hover{color:var(--ink)}
.brand-title{font-size:17px;font-weight:700;letter-spacing:-.01em}
.btn{height:36px;padding:0 14px;background:transparent;border:1px solid var(--line-2);border-radius:999px;font-size:13px;cursor:pointer}
.btn:hover{background:var(--hover)}
.btn--solid{background:var(--ink);color:#fff;border:none;font-weight:500}
.btn--solid:hover{background:var(--ink-hover)}
.btn:disabled{opacity:.4;cursor:default}
.btn:disabled:hover{background:transparent}
.btn--solid:disabled:hover{background:var(--ink)}
.text-input{height:40px;padding:0 12px;background:var(--surface);border:1px solid var(--line-2);border-radius:8px;font:inherit;font-size:14px;color:var(--ink)}
@media (max-width:640px){ .topbar{padding:14px 16px} }

/* ---------- 공통 ---------- */
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);border:0}
.mono{font-family:var(--mono)}
.note{margin:0;font-size:12px;line-height:1.6;color:var(--muted)}
.num{font-family:var(--mono);font-size:13px;color:var(--ink-2)}
.actions{display:flex;gap:8px;flex-wrap:wrap}
input[type=range]{width:100%;accent-color:var(--accent)}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}

.layout{flex:1;display:flex;flex-wrap:wrap;align-items:flex-start}
.work{flex:999 1 420px;min-width:0;padding:32px 28px 48px;display:flex;flex-direction:column;gap:18px}

.privacy{display:flex;align-items:center;gap:10px;padding:10px 14px;background:var(--accent-soft);color:#21366f;border-radius:10px;font-size:13px;line-height:1.5}
.privacy-dot{flex:0 0 auto;width:8px;height:8px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 4px rgba(43,89,255,.18)}

/* 드롭존 */
.drop{position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;min-height:220px;padding:28px 20px;text-align:center;border:1.5px dashed var(--line-2);border-radius:16px;background:
  linear-gradient(var(--surface),var(--surface)) padding-box;cursor:pointer;transition:border-color .2s,background-color .2s,transform .2s}
.drop:hover{border-color:var(--ink-2)}
.drop:focus-within{border-color:var(--accent)}
.drop.is-over{border-color:var(--accent);background:var(--accent-soft);transform:scale(1.005)}
.drop.is-compact{min-height:96px;flex-direction:row;flex-wrap:wrap;gap:6px 14px}
.drop.is-compact .drop-icon svg{width:28px;height:28px}
.drop.is-compact .mono-label{display:none}
.drop-icon{color:var(--accent)}
.drop-title{font-size:17px;font-weight:700;letter-spacing:-.01em}
.drop-sub{font-size:13px;color:var(--ink-2)}
.drop-sub u{text-underline-offset:3px}

/* 안내 단계 */
.steps{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}
.steps li{display:flex;flex-direction:column;gap:4px;padding:16px;border:1px solid var(--line);border-radius:14px;background:var(--panel)}
.steps b{font-size:14px}
.steps span:last-child{font-size:12px;color:var(--muted);line-height:1.5}
.step-n{font-family:var(--mono);font-size:22px;font-weight:500;color:var(--accent);margin-bottom:6px}

/* 요약 */
.summary{display:flex;align-items:center;gap:18px;flex-wrap:wrap;padding:18px 22px;background:var(--ink);color:#fff;border-radius:16px;animation:rise .35s ease}
.summary .mono-label{color:#a9a69d}
.sum-cell{display:flex;flex-direction:column;gap:4px;min-width:0}
.sum-num{font-family:var(--mono);font-size:20px;font-weight:500}
.sum-arrow{font-family:var(--mono);color:#a9a69d}
.sum-cell--save{margin-left:auto;text-align:right}
.sum-big{font-family:var(--mono);font-size:38px;font-weight:500;line-height:1;color:#9fb4ff;letter-spacing:-.02em}
.sum-big.is-up{color:#ffb3a8}

/* 파일 목록 */
.list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:10px}
.item{display:grid;grid-template-columns:72px minmax(0,1fr) auto;gap:16px;align-items:center;padding:12px;background:var(--panel);border:1px solid var(--line);border-radius:14px;animation:rise .3s ease both}
.thumb{width:72px;height:72px;border-radius:10px;overflow:hidden;background:
  repeating-conic-gradient(#ecebe6 0 25%,#fff 0 50%) 0 0/12px 12px}
.thumb img{width:100%;height:100%;object-fit:cover;display:block}
.info{min-width:0;display:flex;flex-direction:column;gap:6px}
.name{font-size:14px;font-weight:500;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.dims{font-family:var(--mono);font-size:12px;color:var(--sub);display:flex;gap:8px;flex-wrap:wrap}
.dims b{color:var(--ink);font-weight:500}
.bars{display:grid;grid-template-columns:auto minmax(0,1fr) auto;gap:4px 10px;align-items:center;font-family:var(--mono);font-size:11px;color:var(--muted)}
.bar{height:6px;border-radius:99px;background:var(--track);overflow:hidden}
.bar i{display:block;height:100%;border-radius:99px;background:var(--line-2);transition:width .4s ease}
.bar--new i{background:var(--accent)}
.bar--new.is-up i{background:var(--bad)}
.bars .val{text-align:right;color:var(--ink-2)}
.side{display:flex;flex-direction:column;align-items:flex-end;gap:8px}
.delta{font-family:var(--mono);font-size:18px;font-weight:500;color:var(--good)}
.delta.is-up{color:var(--bad)}
.delta.is-busy{color:var(--muted);font-size:12px}
.row-btns{display:flex;gap:6px}
.icon-btn{width:36px;height:36px;display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--line-2);border-radius:999px;background:transparent;cursor:pointer;color:var(--ink-2)}
.icon-btn:hover{background:var(--hover);color:var(--ink)}
.dl-btn{height:36px;padding:0 14px;border:none;border-radius:999px;background:var(--accent);color:#fff;font-size:13px;font-weight:500;cursor:pointer}
.dl-btn:hover{background:#1f45d6}
.dl-btn:disabled{opacity:.4;cursor:default}
.item.is-error .delta{color:var(--bad);font-size:12px}

/* ---------- 패널 ---------- */
.panel{flex:1 1 320px;min-width:280px;position:sticky;top:0;align-self:stretch;border-left:1px solid var(--line);background:var(--panel);padding:28px 24px 40px;display:flex;flex-direction:column;gap:24px}
.group{display:flex;flex-direction:column;gap:12px}
.group--line{border-top:1px solid var(--line-3);padding-top:22px}
.seg{display:flex;background:var(--soft);border-radius:999px;padding:3px;gap:2px}
.seg-btn{flex:1;height:32px;background:transparent;color:var(--sub);border:none;border-radius:999px;font-size:13px;cursor:pointer;transition:background .15s,color .15s}
.seg-btn.is-active{background:#fff;color:var(--ink);font-weight:500;box-shadow:0 1px 3px rgba(0,0,0,.12)}
.wh{display:grid;grid-template-columns:minmax(0,1fr) auto minmax(0,1fr);gap:8px;align-items:end}
.field{display:flex;flex-direction:column;gap:6px;min-width:0}
.field .text-input{width:100%}
.field-label{font-size:12px;color:var(--ink-2)}
.field-head{display:flex;justify-content:space-between;align-items:center;font-size:13px;color:var(--ink-2)}
.lock{width:40px;height:40px;border-radius:999px;border:1px solid var(--line-2);background:transparent;display:flex;align-items:center;justify-content:center;cursor:pointer;color:var(--muted);transition:all .15s}
.lock.is-on{background:var(--ink);border-color:var(--ink);color:#fff}
.presets{display:flex;flex-wrap:wrap;gap:6px}
.chip{padding:6px 11px;background:#fff;border:1px solid var(--line-2);border-radius:999px;font-family:var(--mono);font-size:12px;cursor:pointer}
.chip:hover{border-color:var(--ink-2)}
.chip.is-active{background:var(--ink);color:#fff;border-color:var(--ink)}
.size-px{display:flex;flex-direction:column;gap:10px}
.size-pct{display:flex;flex-direction:column;gap:6px}
.check{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--ink-2);cursor:pointer}
.check input{width:16px;height:16px;margin:0;accent-color:var(--ink)}
.quality{display:flex;flex-direction:column;gap:4px;transition:opacity .2s}
.quality.is-off{opacity:.35;pointer-events:none}
.scale{display:flex;justify-content:space-between;font-size:11px;color:var(--muted)}

.toast{position:fixed;left:50%;bottom:28px;transform:translate(-50%,20px);padding:10px 18px;background:var(--ink);color:#fff;border-radius:999px;font-size:13px;opacity:0;pointer-events:none;transition:opacity .2s,transform .2s;z-index:10;max-width:calc(100% - 32px);text-align:center}
.toast.is-show{opacity:1;transform:translate(-50%,0)}

@keyframes rise{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}

@media (max-width:760px){
  .panel{position:static;border-left:none;border-top:1px solid var(--line);padding:24px 16px 40px}
  .work{padding:20px 16px 28px}
}
@media (max-width:520px){
  .steps{grid-template-columns:1fr}
  .steps li{flex-direction:row;flex-wrap:wrap;align-items:baseline;gap:4px 10px;padding:12px 14px}
  .step-n{font-size:14px;margin:0}
  .item{grid-template-columns:56px minmax(0,1fr);gap:12px}
  .thumb{width:56px;height:56px}
  .side{grid-column:1 / -1;flex-direction:row;justify-content:space-between;align-items:center}
  .summary{padding:16px;gap:12px}
  .sum-num{font-size:16px}
  .sum-big{font-size:30px}
  .drop{min-height:180px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms !important;transition-duration:.01ms !important}
}

/* 다크 모드 (인쇄는 라이트 그대로) · 이미지 변환기·압축기도 이 파일을 함께 씀
   썸네일 뒤 체커(투명 표시)와 결과 이미지는 그대로 */
@media screen{
  :root[data-theme="dark"]{
    color-scheme:dark;
    --bg:#131418; --surface:#18191e; --panel:#1d1e24; --panel-soft:#22232a;
    --ink:#eaebf0; --ink-hover:#ffffff; --ink-2:#c6c8d1; --sub:#9c9fab; --muted:#868995;
    --line:#2c2d35; --line-2:#373841; --line-3:#26272e; --hover:#292a32; --soft:#24252c; --track:#32333c;
    --accent:#7f9bff; --accent-soft:rgba(127,155,255,.14); --good:#4cc78d; --bad:#f07a6e;
  }
  :root[data-theme="dark"] .btn--solid,:root[data-theme="dark"] .lock.is-on,
  :root[data-theme="dark"] .chip.is-active,:root[data-theme="dark"] .toast,
  :root[data-theme="dark"] .tb-presets button[aria-pressed="true"]{color:var(--bg)}
  :root[data-theme="dark"] .bar:not(.bar--new) i{background:#5c5e6a}
  :root[data-theme="dark"] .chip{background:var(--surface)}
  :root[data-theme="dark"] .chip.is-active{background:var(--ink)}
  :root[data-theme="dark"] .seg-btn.is-active{background:var(--line-2);box-shadow:0 1px 3px rgba(0,0,0,.4)}
  :root[data-theme="dark"] .privacy{color:#c3d0ff}
  :root[data-theme="dark"] .privacy-dot{box-shadow:0 0 0 4px rgba(127,155,255,.2)}
  /* 원래 어두운 요약 판: 배경과 구분되게 */
  :root[data-theme="dark"] .summary{background:var(--panel-soft);border:1px solid var(--line-2)}
  /* 파란 다운로드 버튼은 흰 글자가 읽히도록 진한 파랑 유지 */
  :root[data-theme="dark"] .dl-btn{background:#3a62f0}
  :root[data-theme="dark"] .dl-btn:hover{background:#4d72ff}
}