:root {
  --bg: #0b0d12; --card: #141821; --card2: #1a1f2b; --line: #262c3a; --fg: #eceef4; --muted: #98a0b3;
  --accent: #6366f1; --accent2: #818cf8; --ok: #22c55e; --err: #ef4444; --radius: 16px;
  color-scheme: dark;
}
@media (prefers-color-scheme: light) {
  :root { --bg: #f4f5fb; --card: #fff; --card2: #f7f8fc; --line: #e2e5ef; --fg: #161a24; --muted: #5b6275; color-scheme: light; }
}
* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }
body {
  background: var(--bg); color: var(--fg); font: 15px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  display: flex; flex-direction: column; align-items: center; padding: 0 16px 32px;
  background-image: radial-gradient(900px 500px at 15% -10%, color-mix(in srgb, var(--accent) 28%, transparent), transparent 60%),
    radial-gradient(700px 400px at 100% 0%, color-mix(in srgb, #ec4899 14%, transparent), transparent 60%);
  background-attachment: fixed;
}
.top { width: min(620px, 100%); display: flex; align-items: center; justify-content: space-between; padding: 22px 0; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--fg); text-decoration: none; font-size: 21px; letter-spacing: -.01em; }
.brand b { color: var(--accent2); }
.logo { width: 38px; height: 38px; }
nav.appnav { display: flex; gap: 16px; white-space: nowrap; }
@media (max-width: 480px) { nav.appnav { gap: 12px; font-size: 13px; } nav.appnav a:last-child { display: none; } .brand { font-size: 18px; } }
nav a { color: var(--muted); text-decoration: none; font-weight: 600; font-size: 14px; }
nav a:hover { color: var(--fg); }
.card { width: min(620px, 100%); background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: 0 24px 70px rgba(0,0,0,.28); overflow: hidden; }
.pad { padding: 24px; }
.head { padding: 22px 24px; border-bottom: 1px solid var(--line); }
.head h1 { margin: 0; font-size: 20px; } .head .sub { color: var(--muted); font-size: 13px; margin-top: 2px; }
.body { padding: 22px 24px; display: grid; gap: 16px; }
.drop {
  border: 2px dashed var(--line); border-radius: var(--radius); padding: 34px 16px; text-align: center; cursor: pointer;
  transition: border-color .15s, background .15s, transform .15s; background: var(--card2);
}
.drop:hover, .drop:focus-visible, .drop.over { border-color: var(--accent); background: color-mix(in srgb, var(--accent) 9%, var(--card2)); outline: none; }
.drop.over { transform: scale(1.01); }
.drop .big { font-size: 38px; line-height: 1; }
.drop b { display: block; font-size: 17px; margin: 8px 0 2px; }
.files { display: grid; gap: 8px; margin: 0; padding: 0; list-style: none; max-height: 320px; overflow: auto; }
.file { display: grid; grid-template-columns: auto 1fr auto auto; gap: 10px; align-items: center; padding: 10px 12px; border: 1px solid var(--line); border-radius: 12px; background: var(--card2); }
.file .ic { font-size: 20px; }
.file .n { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-weight: 600; }
.file .s { color: var(--muted); font-size: 13px; white-space: nowrap; }
.bar { grid-column: 1 / -1; height: 4px; background: var(--line); border-radius: 99px; overflow: hidden; }
.bar i { display: block; height: 100%; width: 0; background: linear-gradient(90deg, var(--accent), var(--accent2)); transition: width .2s; }
.file.done .bar i { background: var(--ok); } .file.fail .bar i { background: var(--err); width: 100%; }
label { display: grid; gap: 6px; font-size: 13px; font-weight: 600; }
input, textarea, select { font: inherit; font-weight: 400; color: var(--fg); background: var(--bg); border: 1px solid var(--line); border-radius: 10px; padding: 10px 12px; width: 100%; }
input:focus, textarea:focus, select:focus { outline: 2px solid var(--accent); outline-offset: -1px; }
textarea { min-height: 76px; resize: vertical; }
.row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
@media (max-width: 540px) { .row { grid-template-columns: 1fr; } }
details { border: 1px solid var(--line); border-radius: 12px; background: var(--card2); }
summary { cursor: pointer; padding: 12px 14px; font-weight: 600; list-style: none; display: flex; justify-content: space-between; }
summary::after { content: '▾'; color: var(--muted); } details[open] summary::after { content: '▴'; }
details > .inner { padding: 0 14px 14px; display: grid; gap: 12px; }
.hint { color: var(--muted); font-size: 12px; font-weight: 400; }
button, .btn {
  font: inherit; font-weight: 650; border: 0; border-radius: 12px; padding: 12px 16px; cursor: pointer; text-decoration: none;
  display: inline-flex; gap: 8px; align-items: center; justify-content: center; color: #fff;
  background: linear-gradient(135deg, var(--accent), #4f46e5); box-shadow: 0 6px 18px color-mix(in srgb, var(--accent) 35%, transparent);
}
button:hover, .btn:hover { filter: brightness(1.08); }
button:disabled { opacity: .5; cursor: not-allowed; filter: none; }
.ghost { background: transparent; color: var(--fg); border: 1px solid var(--line); box-shadow: none; }
.danger { background: transparent; color: var(--err); border: 1px solid color-mix(in srgb, var(--err) 40%, var(--line)); box-shadow: none; }
.x { background: transparent; color: var(--muted); padding: 4px 8px; box-shadow: none; }
.actions { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 10px; }
.msg { padding: 12px 14px; border-radius: 12px; background: color-mix(in srgb, var(--accent) 12%, transparent); white-space: pre-wrap; }
.err { color: var(--err); font-weight: 600; } .muted { color: var(--muted); font-size: 13px; } .center { text-align: center; }
.share { display: flex; gap: 8px; } .share input { flex: 1; font-family: ui-monospace, monospace; font-size: 13px; }
.hero { font-size: 46px; text-align: center; line-height: 1; }
.hidden { display: none !important; }
.foot { color: var(--muted); font-size: 12px; margin-top: 18px; text-align: center; max-width: 620px; }
.sent { display: grid; gap: 8px; }
.sent .item { display: grid; grid-template-columns: 1fr auto; gap: 6px 10px; align-items: center; padding: 12px; border: 1px solid var(--line); border-radius: 12px; background: var(--card2); }
.sent .item .t { font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.sent .item .b { display: flex; gap: 6px; } .sent .item .b button, .sent .item .b a { padding: 6px 10px; font-size: 13px; }
.total { display: flex; justify-content: space-between; color: var(--muted); font-size: 13px; }