[hidden] { display: none !important; }
:root {
  --bg: #ffffff; --bg2: #f5f5f7; --bg3: #e8e8ed; --fg: #1d1d1f; --fg2: #6e6e73; --fg3: #86868b;
  --line: #d2d2d7; --accent: #0071e3; --accent-hover: #0077ed; --danger: #ff3b30; --ok: #34c759;
  --radius: 12px; --radius-sm: 8px; --nav-h: 48px;
  --shadow: 0 4px 24px rgba(0,0,0,.08);
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #000; --bg2: #1d1d1f; --bg3: #2c2c2e; --fg: #f5f5f7; --fg2: #a1a1a6; --fg3: #6e6e73;
          --line: #424245; --accent: #2997ff; --accent-hover: #3aa3ff; --shadow: 0 4px 24px rgba(0,0,0,.5); }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--fg); min-height: 100vh;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "SF Pro KR", "Apple SD Gothic Neo",
               "Pretendard", "Malgun Gothic", "Helvetica Neue", Arial, sans-serif;
  font-size: 17px; line-height: 1.47; -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
button, input, select, textarea { font: inherit; color: inherit; }

/* nav */
.nav { position: sticky; top: 0; z-index: 50; height: var(--nav-h);
  backdrop-filter: saturate(180%) blur(20px); -webkit-backdrop-filter: saturate(180%) blur(20px);
  background: color-mix(in srgb, var(--bg) 78%, transparent); border-bottom: 1px solid var(--line); }
.nav .in { max-width: 1120px; margin: 0 auto; padding: 0 22px; height: 100%; display: flex; align-items: center; gap: 24px; font-size: 14px; }
.nav .brand { font-weight: 600; font-size: 17px; color: var(--fg); letter-spacing: -.01em; }
.nav a { color: var(--fg); opacity: .8; }
.nav a:hover, .nav a.active { opacity: 1; text-decoration: none; }
.nav .spacer { flex: 1; }
.nav form { margin: 0; }
.nav .linkbtn { background: none; border: 0; padding: 0; cursor: pointer; color: var(--fg); opacity: .8; font-size: 14px; }
.nav .linkbtn:hover { opacity: 1; }

main { max-width: 1120px; margin: 0 auto; padding: 32px 22px 80px; }
main.narrow { max-width: 480px; padding-top: 64px; }
h1 { font-size: 40px; font-weight: 700; letter-spacing: -.02em; margin: 0 0 8px; line-height: 1.1; }
h2 { font-size: 28px; font-weight: 700; letter-spacing: -.01em; margin: 40px 0 14px; }
h3 { font-size: 19px; font-weight: 600; margin: 24px 0 8px; }
p { margin: 0 0 12px; }
.sub { color: var(--fg2); font-size: 17px; margin-bottom: 28px; }
.muted { color: var(--fg2); }
.small { font-size: 13px; }

/* hero (landing) */
.hero { text-align: center; padding: 96px 22px 48px; }
.hero h1 { font-size: 64px; margin-bottom: 12px; }
.hero p { font-size: 24px; color: var(--fg2); margin: 0 0 32px; }
.hero .actions { display: flex; gap: 12px; justify-content: center; }
.features { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; max-width: 980px; margin: 0 auto; padding: 0 22px 80px; }
.feature { background: var(--bg2); border-radius: 18px; padding: 24px; }
.feature h4 { margin: 0 0 6px; font-size: 19px; }
.feature p { margin: 0; color: var(--fg2); font-size: 15px; }

/* buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 44px; padding: 0 22px;
  border-radius: 980px; border: 0; background: var(--accent); color: #fff; font-size: 17px; font-weight: 500; cursor: pointer;
  transition: background .15s, transform .05s; white-space: nowrap; }
.btn:hover { background: var(--accent-hover); text-decoration: none; }
.btn:active { transform: scale(.98); }
.btn:disabled { opacity: .5; cursor: default; }
.btn.secondary { background: var(--bg3); color: var(--fg); }
.btn.ghost { background: transparent; color: var(--accent); }
.btn.danger { background: var(--danger); }
.btn.sm { min-height: 34px; padding: 0 14px; font-size: 14px; }
.btn.block { width: 100%; }

/* forms */
.field { margin-bottom: 14px; }
.field label { display: block; font-size: 13px; color: var(--fg2); margin-bottom: 6px; }
.input { width: 100%; min-height: 44px; padding: 10px 14px; border-radius: var(--radius-sm); border: 1px solid var(--line);
  background: var(--bg); color: var(--fg); outline: none; transition: border-color .15s, box-shadow .15s; }
.input:focus { border-color: var(--accent); box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent) 22%, transparent); }
.input.invalid { border-color: var(--danger); }
.err { color: var(--danger); font-size: 13px; margin-top: 6px; }
.form-card { background: var(--bg2); border-radius: 18px; padding: 28px; }
.form-card h1 { font-size: 28px; margin-bottom: 20px; }
.form-foot { text-align: center; margin-top: 18px; font-size: 15px; color: var(--fg2); }

/* alerts */
.alert { border-radius: var(--radius-sm); padding: 12px 16px; margin-bottom: 18px; font-size: 15px; background: var(--bg2); }
.alert.error { background: color-mix(in srgb, var(--danger) 12%, var(--bg)); color: var(--danger); }
.alert.ok { background: color-mix(in srgb, var(--ok) 14%, var(--bg)); }

/* library */
.toolbar { display: flex; align-items: center; gap: 12px; margin-bottom: 20px; flex-wrap: wrap; }
.toolbar .spacer { flex: 1; }
.dropzone { border: 2px dashed var(--line); border-radius: 18px; padding: 36px 20px; text-align: center; color: var(--fg2);
  transition: border-color .15s, background .15s; margin-bottom: 28px; }
.dropzone.over { border-color: var(--accent); background: color-mix(in srgb, var(--accent) 8%, var(--bg)); }
.dropzone strong { color: var(--fg); }
.progress-list { display: grid; gap: 8px; margin-bottom: 20px; }
.progress-item { background: var(--bg2); border-radius: var(--radius-sm); padding: 10px 14px; font-size: 14px; }
.progress-item .bar { height: 4px; border-radius: 2px; background: var(--bg3); margin-top: 8px; overflow: hidden; }
.progress-item .bar i { display: block; height: 100%; width: 0; background: var(--accent); transition: width .2s; }
.progress-item.done .bar i { background: var(--ok); }
.progress-item.fail { color: var(--danger); }

.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 18px; }
.card { background: var(--bg2); border-radius: 16px; overflow: hidden; color: var(--fg); display: block; transition: transform .15s, box-shadow .15s; }
.card:hover { transform: translateY(-2px); box-shadow: var(--shadow); text-decoration: none; }
.card .thumb { aspect-ratio: 16 / 10; background: var(--bg3); display: flex; align-items: center; justify-content: center; color: var(--fg3); font-size: 13px; position: relative; overflow: hidden; }
.card .thumb img { width: 100%; height: 100%; object-fit: cover; display: block; }
.card .thumb .dur { position: absolute; right: 8px; bottom: 8px; background: rgba(0,0,0,.65); color: #fff; font-size: 12px; padding: 2px 7px; border-radius: 6px; }
.card .thumb .badge { position: absolute; left: 8px; top: 8px; background: rgba(0,0,0,.55); color: #fff; font-size: 11px; padding: 2px 7px; border-radius: 6px; text-transform: uppercase; letter-spacing: .04em; }
.card .body { padding: 12px 14px 14px; }
.card .title { font-weight: 600; font-size: 15px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.card .meta { color: var(--fg2); font-size: 13px; margin-top: 2px; }
.empty { text-align: center; color: var(--fg2); padding: 60px 20px; }

/* detail */
.detail { display: grid; grid-template-columns: minmax(0, 2fr) minmax(280px, 1fr); gap: 28px; }
.player { background: #000; border-radius: 16px; overflow: hidden; aspect-ratio: 16 / 9; display: flex; align-items: center; justify-content: center; }
.player video, .player img { max-width: 100%; max-height: 100%; }
.kv { display: grid; grid-template-columns: 110px 1fr; gap: 6px 12px; font-size: 14px; }
.kv dt { color: var(--fg2); } .kv dd { margin: 0; word-break: break-all; }
.actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 20px; }
@media (max-width: 760px) { .detail { grid-template-columns: 1fr; } .hero h1 { font-size: 44px; } .hero p { font-size: 19px; } }

/* download panel / detail extras */
.btn.disabled { opacity: .45; pointer-events: none; }
.dl-panel { margin-top: 20px; background: var(--bg2); border-radius: var(--radius); padding: 16px 18px; }
.dl-panel h3 { margin-top: 0; }
.dl-row { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 10px; align-items: center; }
.dl-row .input { width: auto; min-height: 36px; padding: 6px 10px; font-size: 14px; }
.dl-status { font-size: 14px; margin-top: 8px; }
.dl-status.error { color: var(--danger); }
.dl-status .btn { margin-right: 8px; }

/* import panel */
.import-panel { background: var(--bg2); border-radius: 18px; padding: 18px 20px; margin-bottom: 28px; }
.import-panel h3 { margin: 0 0 10px; }
.import-row { display: flex; gap: 8px; }
.import-row .input { flex: 1; }
.import-list { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 12px; margin-top: 14px; }
.import-item { display: flex; gap: 10px; align-items: center; background: var(--bg); border: 1px solid var(--line); border-radius: 12px; padding: 8px; cursor: pointer; font-size: 14px; }
.import-item.on { border-color: var(--accent); box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 20%, transparent); }
.import-item img { width: 72px; height: 54px; object-fit: cover; border-radius: 6px; background: var(--bg3); flex: none; }
.import-item .t { font-weight: 500; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.import-item .m { color: var(--fg2); font-size: 12px; }
.import-status { margin-top: 10px; font-size: 14px; }
.import-status.error { color: var(--danger); }
.card .badge.proc { background: var(--accent); }

/* library toolbar / select mode */
.lib-toolbar { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; margin: 24px 0 16px; }
.lib-toolbar .input { width: auto; min-height: 38px; padding: 7px 12px; font-size: 15px; }
.lib-toolbar .search { min-width: 200px; flex: 1 1 200px; max-width: 320px; }
.lib-toolbar .spacer { flex: 1; }
.bulkbar { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; background: var(--bg2); border-radius: var(--radius); padding: 10px 14px; margin-bottom: 14px; }
.bulkbar .switch { margin: 0; }
.bulkbar .spacer { flex: 1; }
.card-wrap { position: relative; }
.card-wrap .pick { display: none; position: absolute; left: 10px; top: 10px; z-index: 2; cursor: pointer; }
.card-wrap .pick input { width: 22px; height: 22px; accent-color: var(--accent); }
.grid.picking .card-wrap .pick { display: block; }
.grid.picking .card { cursor: pointer; }
.grid.picking .card-wrap:has(input:checked) .card { outline: 3px solid var(--accent); outline-offset: -1px; }
.grid.picking .thumb .badge { left: 40px; }
.import-panel summary { cursor: pointer; font-size: 17px; list-style: none; }
.import-panel summary::-webkit-details-marker { display: none; }
.import-panel summary::before { content: "+ "; color: var(--fg2); }
.import-panel[open] summary::before { content: "- "; }
.import-panel[open] summary { margin-bottom: 14px; }
.import-panel .import-row { margin-top: 0; }