:root {
  --bg: #f7f8fa; --card: #ffffff; --ink: #1a2233; --muted: #667085;
  --brand: #2563eb; --brand-ink: #ffffff; --ok: #059669; --err: #dc2626;
  --border: #e4e7ec; --radius: 12px;
}
* { box-sizing: border-box; }
body { margin: 0; font-family: -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif; background: var(--bg); color: var(--ink); line-height: 1.6; }
.wrap { max-width: 920px; margin: 0 auto; padding: 0 20px; }

header { background: var(--card); border-bottom: 1px solid var(--border); }
.nav { display: flex; justify-content: space-between; align-items: center; padding: 14px 20px; }
.brand { font-weight: 700; font-size: 18px; color: var(--ink); text-decoration: none; }
nav a { margin-left: 18px; color: var(--muted); text-decoration: none; font-size: 14px; }
nav a:hover { color: var(--brand); }

.hero { text-align: center; padding: 48px 0 24px; }
.hero h1 { font-size: 34px; margin: 0 0 10px; }
.hero h1 em { color: var(--brand); font-style: normal; }
.sub { color: var(--muted); font-size: 16px; margin: 0; }

.card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; margin: 16px 0; }

#dropzone { border: 2px dashed var(--border); border-radius: var(--radius); padding: 36px 16px; text-align: center; cursor: pointer; transition: border-color .15s, background .15s; }
#dropzone:hover, #dropzone.drag { border-color: var(--brand); background: #f0f5ff; }
.dz-icon { font-size: 34px; }
.dz-text { margin-top: 6px; }
.dz-sub { color: var(--muted); font-size: 13px; margin-top: 4px; }

.hint { background: #f0f5ff; border: 1px solid #c7d7fe; color: #1e40af; border-radius: 8px; padding: 8px 12px; font-size: 13px; margin-top: 12px; }

.filelist { margin-top: 16px; display: flex; flex-direction: column; gap: 8px; }
.frow { display: flex; align-items: center; gap: 10px; border: 1px solid var(--border); border-radius: 8px; padding: 8px 12px; font-size: 14px; flex-wrap: wrap; }
.frow .fname { flex: 1; min-width: 140px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-weight: 500; }
.frow .fsize { color: var(--muted); font-size: 12px; }
.frow select { padding: 5px 8px; border: 1px solid var(--border); border-radius: 6px; font-size: 13px; }
.frow .status { font-size: 12px; color: var(--muted); min-width: 90px; text-align: right; }
.frow .status.ok { color: var(--ok); font-weight: 600; }
.frow .status.err { color: var(--err); font-weight: 600; }
.frow .bar { height: 4px; background: var(--border); border-radius: 2px; flex-basis: 100%; overflow: hidden; display: none; }
.frow.running .bar { display: block; }
.frow .bar i { display: block; height: 100%; background: var(--brand); width: 0; transition: width .2s; }
.dl-btn { font-size: 13px; color: var(--brand); text-decoration: none; font-weight: 600; }
.frow .note { flex-basis: 100%; font-size: 12px; color: var(--muted); }

.actions { display: flex; gap: 10px; margin-top: 16px; flex-wrap: wrap; }
.btn { display: inline-block; padding: 10px 22px; border-radius: 8px; border: 1px solid var(--border); background: var(--card); color: var(--ink); font-size: 15px; font-weight: 600; cursor: pointer; text-decoration: none; text-align: center; }
.btn:hover { border-color: var(--brand); color: var(--brand); }
.btn.primary { background: var(--brand); border-color: var(--brand); color: var(--brand-ink); }
.btn.primary:hover { opacity: .92; color: var(--brand-ink); }
.btn.ghost { border-color: transparent; color: var(--muted); }
.btn:disabled { opacity: .5; cursor: not-allowed; }

.msg { margin-top: 12px; padding: 10px 12px; border-radius: 8px; font-size: 14px; }
.msg.err { background: #fef2f2; color: var(--err); border: 1px solid #fecaca; }
.msg.info { background: #f0fdf4; color: var(--ok); border: 1px solid #bbf7d0; }

.sec { margin: 40px 0; }
.sec h2 { font-size: 22px; }
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(210px, 1fr)); gap: 10px; }
.fmt-card { display: block; background: var(--card); border: 1px solid var(--border); border-radius: 8px; padding: 12px 14px; text-decoration: none; color: var(--ink); font-size: 14px; }
.fmt-card:hover { border-color: var(--brand); }
.fmt-card b { color: var(--brand); }

.plans { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; max-width: 640px; }
.plan { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; }
.plan.featured { border-color: var(--brand); box-shadow: 0 2px 12px rgba(37,99,235,.12); }
.plan h3 { margin: 0; font-size: 16px; }
.price { font-size: 28px; font-weight: 700; margin: 8px 0; }
.price span { font-size: 13px; color: var(--muted); font-weight: 400; }
.plan ul { padding-left: 18px; margin: 0 0 14px; color: var(--muted); font-size: 14px; }
.fine { color: var(--muted); font-size: 13px; }

.cross-links ul { list-style: none; padding: 0; }
.cross-links li { margin: 6px 0; }
.cross-links a { color: var(--brand); }

footer { border-top: 1px solid var(--border); margin-top: 48px; padding: 20px 0; color: var(--muted); font-size: 13px; }
footer a { color: var(--muted); }

@media (max-width: 600px) {
  .hero h1 { font-size: 26px; }
  .frow .status { min-width: 70px; }
}