:root{
  --bg:#f5f6fa; --card:#fff; --ink:#1c2030; --muted:#6b7285; --line:#e3e6ef;
  --brand:#4f46e5; --brand-ink:#fff; --ok:#12805c; --warn:#b45309; --bad:#c0392b;
  --side:#161a2b; --side-ink:#c9cee3; --r:12px;
}
@media (prefers-color-scheme:dark){
  :root{--bg:#0f1220;--card:#181c30;--ink:#eceff8;--muted:#98a0b8;--line:#2a3050;--side:#0b0e1a;}
}
*{box-sizing:border-box}
body{margin:0;font:15px/1.6 -apple-system,"Pretendard","Noto Sans KR",system-ui,sans-serif;background:var(--bg);color:var(--ink)}
.top{display:flex;justify-content:space-between;align-items:center;padding:14px 24px;border-bottom:1px solid var(--line);background:var(--card)}
.brand{font-weight:800;color:var(--brand);text-decoration:none;font-size:18px}
.top nav{display:flex;gap:12px;align-items:center;font-size:13px;color:var(--muted)}
.wrap{max-width:1080px;margin:0 auto;padding:32px 20px 80px}
h1{margin:0;font-size:30px;text-align:center}
.sub{text-align:center;color:var(--muted);margin:6px 0 24px}
.muted{color:var(--muted)}
.link{background:none;border:0;color:var(--brand);cursor:pointer;font:inherit;padding:0}

.stepper{list-style:none;display:grid;grid-template-columns:repeat(6,1fr);gap:8px;padding:0;margin:0 0 20px}
.stepper li button{width:100%;padding:10px 6px;border-radius:10px;border:1px solid var(--line);background:var(--card);color:var(--muted);font:inherit;font-size:13px;cursor:pointer}
.stepper li button[disabled]{cursor:not-allowed;opacity:.65}
.stepper li.on button{border-color:var(--brand);color:var(--brand);font-weight:700;box-shadow:0 0 0 2px color-mix(in srgb,var(--brand) 20%,transparent)}
.stepper li.done button{color:var(--ok)}

.window{background:var(--card);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;box-shadow:0 10px 30px rgba(20,24,50,.08)}
.titlebar{display:flex;align-items:center;gap:6px;padding:10px 14px;background:var(--side);color:var(--side-ink);font-size:12px}
.titlebar i{width:10px;height:10px;border-radius:50%;background:#555b78;display:inline-block}
.titlebar span{margin-left:10px}
.body{display:grid;grid-template-columns:200px 1fr;min-height:520px}
.side{background:var(--side);padding:12px 8px}
.side button{display:block;width:100%;text-align:left;background:none;border:0;color:var(--side-ink);padding:10px 12px;border-radius:8px;font:inherit;font-size:14px;cursor:pointer}
.side button:hover:not([disabled]){background:rgba(255,255,255,.07)}
.side button.on{background:var(--brand);color:#fff}
.side button[disabled]{opacity:.4;cursor:not-allowed}
.view{padding:28px 32px}
.view h2{margin:0 0 4px;font-size:22px}
.view .lead{margin:0 0 20px;color:var(--muted)}

label{display:block;font-size:13px;font-weight:600;margin:14px 0 4px}
input,select,textarea{width:100%;padding:10px 12px;border:1px solid var(--line);border-radius:8px;background:var(--bg);color:var(--ink);font:inherit}
textarea{min-height:70px;resize:vertical}
input:focus,select:focus,textarea:focus{outline:2px solid var(--brand);outline-offset:0}
.row{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.btn{display:inline-flex;align-items:center;gap:8px;padding:10px 18px;border:0;border-radius:9px;background:var(--brand);color:var(--brand-ink);font:inherit;font-weight:700;cursor:pointer}
.btn.ghost{background:transparent;color:var(--brand);border:1px solid var(--brand)}
.btn.sm{padding:6px 12px;font-size:13px}
.btn[disabled]{opacity:.55;cursor:wait}
.actions{display:flex;gap:10px;margin-top:20px;flex-wrap:wrap}
.tabs{display:flex;gap:6px;margin-bottom:8px}
.tabs button{padding:7px 14px;border-radius:8px;border:1px solid var(--line);background:none;color:var(--muted);font:inherit;cursor:pointer}
.tabs button.on{background:var(--brand);color:#fff;border-color:var(--brand)}

.cards{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}
.card{border:1px solid var(--line);border-radius:10px;padding:12px 14px;background:var(--bg)}
.card.pick{cursor:pointer}
.card.pick:hover,.card.sel{border-color:var(--brand);box-shadow:0 0 0 2px color-mix(in srgb,var(--brand) 18%,transparent)}
.card b{display:block}
.tag{display:inline-block;font-size:11px;padding:1px 8px;border-radius:99px;border:1px solid var(--line);color:var(--muted);margin-right:4px}
.pf{display:flex;justify-content:space-between;align-items:center;gap:10px}
.pf small{color:var(--muted)}
.ok{color:var(--ok)} .warn{color:var(--warn)} .bad{color:var(--bad)}
iframe.preview{width:100%;height:420px;border:1px solid var(--line);border-radius:10px;background:#fff}
.stat{display:flex;gap:16px;flex-wrap:wrap;margin:10px 0;color:var(--muted);font-size:13px}
.note{font-size:12.5px;color:var(--muted);background:var(--bg);border:1px dashed var(--line);border-radius:8px;padding:10px 12px;margin-top:14px}
.err{color:var(--bad);font-size:13px;margin-top:10px;min-height:18px}
.spin{width:14px;height:14px;border:2px solid currentColor;border-right-color:transparent;border-radius:50%;animation:sp .7s linear infinite;display:inline-block}
@keyframes sp{to{transform:rotate(360deg)}}
.toast{position:fixed;left:50%;bottom:28px;transform:translateX(-50%);background:var(--ink);color:var(--bg);padding:10px 18px;border-radius:99px;font-size:14px;z-index:9}
table.res{width:100%;border-collapse:collapse;font-size:14px}
table.res th,table.res td{text-align:left;padding:8px 6px;border-bottom:1px solid var(--line);vertical-align:top}

@media (max-width:760px){
  .stepper{grid-template-columns:repeat(3,1fr)}
  .body{grid-template-columns:1fr}
  .side{display:flex;overflow:auto;gap:4px}
  .side button{white-space:nowrap;width:auto}
  .cards,.row{grid-template-columns:1fr}
  .view{padding:20px 16px}
}