:root {
  --bg: #f6f7fb; --card: #fff; --text: #1f2430; --muted: #6a7285;
  --primary: #4f46e5; --primary-d: #4338ca; --border: #dfe3ee; --err: #d93025; --ok: #188038;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #14161d; --card: #1e212b; --text: #e8eaf1; --muted: #9aa2b6; --border: #333848; --primary: #7c75ff; --primary-d: #968fff; }
}
* { box-sizing: border-box; }
body { margin: 0; font-family: -apple-system, "Segoe UI", "Malgun Gothic", "Apple SD Gothic Neo", sans-serif; background: var(--bg); color: var(--text); line-height: 1.7; }
a { color: var(--primary); }
.wrap { max-width: 900px; margin: 0 auto; padding: 0 16px; }
header.site { background: var(--card); border-bottom: 1px solid var(--border); }
header.site .wrap { display: flex; align-items: center; justify-content: space-between; padding-top: 14px; padding-bottom: 14px; flex-wrap: wrap; gap: 8px; }
.logo { font-weight: 800; font-size: 1.2rem; color: var(--text); text-decoration: none; }
nav.pairs a { font-size: .9rem; margin-left: 12px; text-decoration: none; }
h1 { font-size: 1.8rem; line-height: 1.3; margin: 28px 0 8px; }
.lead { color: var(--muted); margin: 0 0 20px; }
.card { background: var(--card); border: 1px solid var(--border); border-radius: 14px; padding: 20px; margin-bottom: 20px; }
.dropzone { border: 2px dashed var(--border); border-radius: 12px; padding: 36px 16px; text-align: center; cursor: pointer; transition: .15s; }
.dropzone:hover, .dropzone.over, .dropzone:focus-visible { border-color: var(--primary); background: color-mix(in srgb, var(--primary) 8%, transparent); outline: none; }
.dropzone strong { display: block; font-size: 1.1rem; }
.dropzone span { color: var(--muted); font-size: .9rem; }
.file-input { display: none; }
.options { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 14px; margin: 18px 0; }
.options label { display: block; font-size: .85rem; color: var(--muted); margin-bottom: 4px; }
.options select, .options input[type=number] { width: 100%; padding: 8px 10px; border: 1px solid var(--border); border-radius: 8px; background: var(--bg); color: var(--text); font-size: 1rem; }
.options input[type=range] { width: 100%; }
.rs { display: flex; gap: 6px; align-items: center; }
.keep { font-size: .85rem; margin-top: 4px; display: flex; gap: 6px; align-items: center; color: var(--muted); }
.btn { display: inline-block; padding: 10px 18px; border-radius: 8px; border: 0; background: var(--primary); color: #fff; font-size: 1rem; cursor: pointer; text-decoration: none; }
.btn:hover { background: var(--primary-d); }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.btn.small { padding: 4px 10px; font-size: .85rem; }
.btn.ghost { background: transparent; color: var(--muted); border: 1px solid var(--border); }
.actions { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
.file-list { list-style: none; padding: 0; margin: 16px 0 0; }
.file-item { display: grid; grid-template-columns: 1fr auto; gap: 2px 12px; padding: 10px 0; border-top: 1px solid var(--border); align-items: center; }
.fname { font-weight: 600; word-break: break-all; }
.finfo { grid-column: 1; color: var(--muted); font-size: .85rem; }
.fact { grid-column: 2; grid-row: 1 / span 2; display: flex; gap: 6px; }
.err { color: var(--err); }
.msg { margin: 10px 0 0; min-height: 1.5em; color: var(--ok); }
.msg.err { color: var(--err); }
.privacy-note { font-size: .85rem; color: var(--muted); margin-top: 8px; }
.ad { margin: 20px 0; text-align: center; overflow: hidden; }
.ad ins.adsbygoogle { display: block; width: 100%; }
article.seo h2 { font-size: 1.3rem; margin-top: 28px; }
article.seo h3 { font-size: 1.05rem; }
.pair-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(130px, 1fr)); gap: 8px; list-style: none; padding: 0; }
.pair-grid a { display: block; padding: 8px 10px; border: 1px solid var(--border); border-radius: 8px; text-align: center; text-decoration: none; background: var(--card); }
footer.site { border-top: 1px solid var(--border); margin-top: 40px; padding: 24px 0; color: var(--muted); font-size: .9rem; }
footer.site a { margin-right: 14px; }
[hidden] { display: none !important; }
@media (max-width: 520px) { h1 { font-size: 1.5rem; } .file-item { grid-template-columns: 1fr; } .fact { grid-column: 1; grid-row: auto; } }
.ad:empty { display: none; }
.ad-dev { min-height: 120px; display: flex; align-items: center; justify-content: center; border-radius: 8px; font-size: .85rem; border: 2px dashed #f59e0b; background: color-mix(in srgb, #f59e0b 10%, transparent); color: #b45309; text-align: center; padding: 8px; }