:root {
  --bg: #0a0e17;
  --card: #131927;
  --bd: #232c40;
  --ink: #eef2fb;
  --muted: #8b97b1;
  --grad: linear-gradient(135deg, #62D8FF 0%, #3F82F8 50%, #2856D6 100%);
  --blue: #3F82F8;
  --cyan: #62D8FF;
  --danger: #ff6b6b;
  --green: #34d399;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.5;
}
a { color: var(--cyan); text-decoration: none; }
a:hover { text-decoration: underline; }
.muted { color: var(--muted); font-size: 13px; }

header.nav {
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 24px; border-bottom: 1px solid var(--bd);
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 18px; }
.brand img { width: 28px; height: 28px; }
.brand .accent { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }

.container { max-width: 960px; margin: 0 auto; padding: 32px 24px; }
.hero { text-align: center; padding: 64px 24px; }
.hero h1 { font-size: 40px; margin: 0 0 12px; }
.hero h1 .accent { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero p { color: var(--muted); font-size: 17px; max-width: 560px; margin: 0 auto 28px; }

.btn {
  display: inline-block; padding: 11px 22px; border-radius: 10px; border: none;
  background: var(--grad); color: #fff; font-weight: 600; font-size: 15px; cursor: pointer;
}
.btn:hover { opacity: .92; text-decoration: none; }
.btn[disabled] { opacity: .4; cursor: not-allowed; }
.btn-ghost { background: transparent; border: 1px solid var(--bd); color: var(--ink); }
.link { background: none; border: none; color: var(--cyan); cursor: pointer; font-size: 14px; padding: 0; }
.link.danger { color: var(--danger); }

.card { background: var(--card); border: 1px solid var(--bd); border-radius: 14px; padding: 22px; }
.grid { display: grid; gap: 16px; }
.row { display: flex; gap: 16px; flex-wrap: wrap; align-items: center; }
.spread { display: flex; justify-content: space-between; align-items: center; gap: 16px; }

.balance { font-size: 32px; font-weight: 700; }
.balance .accent { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }

table { width: 100%; border-collapse: collapse; margin-top: 8px; }
th, td { text-align: left; padding: 12px 10px; border-bottom: 1px solid var(--bd); vertical-align: top; }
th { color: var(--muted); font-weight: 600; font-size: 12px; text-transform: uppercase; letter-spacing: .04em; }
tr.voided .desc { text-decoration: line-through; color: var(--muted); }
td.actions a, td.actions button { margin-right: 12px; }

.badge { padding: 3px 10px; border-radius: 999px; font-size: 12px; font-weight: 600; }
.badge-active { background: rgba(52,211,153,.15); color: var(--green); }
.badge-void { background: rgba(255,107,107,.15); color: var(--danger); }

input[type=text], input[type=file], textarea {
  width: 100%; padding: 11px 12px; border-radius: 10px; border: 1px solid var(--bd);
  background: #0d1320; color: var(--ink); font-size: 15px; font-family: inherit;
}
label { display: block; margin: 14px 0 6px; font-size: 14px; color: var(--muted); }

.packs { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 14px; }
.pack { background: var(--card); border: 1px solid var(--bd); border-radius: 14px; padding: 18px; text-align: center; }
.pack-label { font-weight: 600; }
.pack-price { font-size: 26px; font-weight: 700; margin: 6px 0; }
.pack .btn { margin-top: 10px; width: 100%; }

.qr { display: flex; justify-content: center; padding: 18px; background: #fff; border-radius: 12px; width: fit-content; margin: 0 auto; }
.kv { display: grid; grid-template-columns: 140px 1fr; gap: 8px 16px; margin-top: 16px; word-break: break-all; }
.kv .k { color: var(--muted); font-size: 13px; }
.mono { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 13px; }
.center { text-align: center; }
.notice { padding: 12px 14px; border-radius: 10px; margin: 12px 0; font-size: 14px; }
.notice.ok { background: rgba(52,211,153,.12); color: var(--green); }
.notice.err { background: rgba(255,107,107,.12); color: var(--danger); }
.big-badge { font-size: 18px; padding: 8px 18px; }

/* per-file cards (verify page) */
.files { display: grid; gap: 10px; margin-top: 8px; text-align: left; }
.files .fhead { font-size: 12px; color: var(--muted); text-transform: uppercase; letter-spacing: .04em; }
.filecard { background: #0d1320; border: 1px solid var(--bd); border-radius: 10px; padding: 12px 14px; }
.filecard .fn { font-weight: 600; word-break: break-word; display: flex; gap: 8px; align-items: baseline; }
.filecard .fn .ix { color: var(--muted); font-weight: 400; font-size: 12px; }
.filecard .fattr { display: grid; grid-template-columns: 64px minmax(0,1fr); gap: 6px 10px; margin-top: 10px; align-items: center; }
.filecard .fk { color: var(--muted); font-size: 11px; text-transform: uppercase; letter-spacing: .04em; }
.chip { display: inline-flex; align-items: center; gap: 8px; background: rgba(255,255,255,.04); border: 1px solid var(--bd); border-radius: 7px; padding: 3px 9px; min-width: 0; max-width: 100%; }
.chip .mono { font-size: 12px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.chip a.mono { color: var(--cyan); text-decoration: none; }
.chip .copy { cursor: pointer; border: none; background: none; color: var(--muted); font-size: 13px; line-height: 1; flex: none; padding: 0; }
.chip .copy:hover { color: var(--ink); }
footer { text-align: center; color: var(--muted); font-size: 13px; padding: 32px; border-top: 1px solid var(--bd); margin-top: 48px; }
footer a { color: var(--ink); text-decoration: none; opacity: .85; }
.spinner { display: inline-block; width: 13px; height: 13px; margin-right: 7px; vertical-align: -2px; border: 2px solid rgba(255,255,255,.35); border-top-color: #fff; border-radius: 50%; animation: nspin .6s linear infinite; }
@keyframes nspin { to { transform: rotate(360deg); } }
.dropzone { border: 2px dashed var(--bd); border-radius: 10px; padding: 26px 16px; text-align: center; cursor: pointer; transition: border-color .15s, background .15s; background: rgba(255,255,255,.02); margin-top: 6px; }
.dropzone:hover, .dropzone.drag { border-color: #3F82F8; background: rgba(63,130,248,.07); }
.dz-text { color: var(--muted); font-size: 14px; pointer-events: none; }
.dz-link { color: #3F82F8; text-decoration: underline; }
.file-list { margin-top: 10px; display: flex; flex-direction: column; gap: 6px; }
.fl-item { display: flex; align-items: center; gap: 10px; background: rgba(255,255,255,.04); border: 1px solid var(--bd); border-radius: 8px; padding: 7px 10px; font-size: 13px; }
.fl-name { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; color: var(--ink); }
.fl-size { color: var(--muted); font-size: 12px; white-space: nowrap; }
.fl-x { background: none; border: 0; color: var(--muted); font-size: 18px; line-height: 1; cursor: pointer; padding: 0 4px; }
.fl-x:hover { color: #ff6b6b; }