:root{--brand:#0b5fb0;--ink:#111;--muted:#595959;--line:#ddd;--bg:#fff;--ok:#1a7f37;--warn:#b26a00;--bad:#c62828;--focus:#0b5fb0}
*{box-sizing:border-box}
html{font-size:16px}
body{margin:0;background:var(--bg);color:var(--ink);font-family:"Pretendard","Apple SD Gothic Neo","Noto Sans KR",system-ui,sans-serif;line-height:1.5}
a{color:var(--brand)}
:focus-visible{outline:3px solid var(--focus);outline-offset:2px}
.top{display:flex;align-items:baseline;gap:16px;padding:16px 24px;border-bottom:1px solid var(--line);flex-wrap:wrap}
.logo{font-size:22px;font-weight:700;text-decoration:none;color:var(--ink)}
.tag{margin:0;color:var(--muted)}
main{padding:16px 24px 40px}
.search{display:grid;grid-template-columns:auto 1fr 1fr auto;gap:12px;align-items:end;max-width:1200px}
.kind{border:0;margin:0;padding:0;display:flex;gap:8px}
.kind legend{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
.kind label{display:inline-flex;align-items:center;gap:6px;min-height:44px;padding:0 14px;border:1px solid var(--line);border-radius:8px;cursor:pointer}
.kind label:has(input:checked){border-color:var(--brand);background:#eef4fb;font-weight:600}
.kind input{width:18px;height:18px;margin:0}
.field{display:flex;flex-direction:column;gap:4px;font-size:14px;color:var(--muted)}
.field input{min-height:44px;font-size:16px;padding:8px 10px;border:1px solid var(--line);border-radius:8px;color:var(--ink)}
.go{min-height:44px;padding:0 20px;font-size:16px;font-weight:600;background:var(--brand);color:#fff;border:0;border-radius:8px;cursor:pointer}
.go[disabled]{opacity:.6;cursor:wait}
.status{margin:16px 0 8px;min-height:1.5em}
.status.err{color:var(--bad)}
.sources{display:flex;flex-wrap:wrap;gap:8px 16px;font-size:14px;color:var(--muted);margin-bottom:8px}
.sources .bad{color:var(--bad)}
.sources .warn{color:var(--warn)}
.chips{display:flex;flex-wrap:wrap;gap:8px;margin:8px 0 16px}
.chips button{min-height:36px;padding:0 12px;border:1px solid var(--line);border-radius:18px;background:#fff;font-size:14px;cursor:pointer}
.chips button[aria-pressed="true"]{border-color:var(--brand);background:#eef4fb;font-weight:600}
.results{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:12px}
.card{border:1px solid var(--line);border-radius:10px;padding:14px;display:flex;flex-direction:column;gap:6px}
.card h3{margin:0;font-size:17px}
.card .meta{margin:0;color:var(--muted);font-size:14px}
.card .remain{font-weight:700;color:var(--ok)}
.card .remain.low{color:var(--warn)}
.card .src{font-size:13px;color:var(--muted)}
.card a.book{margin-top:auto;display:inline-flex;align-items:center;justify-content:center;min-height:44px;border:1px solid var(--brand);border-radius:8px;text-decoration:none;font-weight:600}
.empty{grid-column:1/-1;padding:32px 0;color:var(--muted)}
.foot{padding:16px 24px;border-top:1px solid var(--line);color:var(--muted);font-size:14px}
@media (max-width:720px){.search{grid-template-columns:1fr 1fr}.kind{grid-column:1/-1}.go{grid-column:1/-1}main,.top,.foot{padding-left:16px;padding-right:16px}}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}