:root {
  --bg: #f6f7f9;
  --surface: #ffffff;
  --surface-2: #f0f2f5;
  --border: #e2e5ea;
  --text: #16181d;
  --muted: #646b78;
  --accent: #3b5bdb;
  --accent-hover: #2f4bc0;
  --accent-soft: #e8edfd;
  --ok: #2b8a3e;
  --ok-soft: #e6f4ea;
  --warn: #b35c00;
  --warn-soft: #fff1e0;
  --danger: #c92a2a;
  --danger-soft: #fdeaea;
  --shadow: 0 1px 2px rgba(16, 24, 40, .05), 0 4px 16px rgba(16, 24, 40, .06);
  --radius: 12px;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1115;
    --surface: #171a20;
    --surface-2: #1f232b;
    --border: #2b303a;
    --text: #e8eaee;
    --muted: #9aa1ad;
    --accent: #7c96ff;
    --accent-hover: #93a8ff;
    --accent-soft: #1f2744;
    --ok: #5cc077;
    --ok-soft: #16301e;
    --warn: #f0a050;
    --warn-soft: #36260f;
    --danger: #ff7373;
    --danger-soft: #3a1818;
    --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 4px 16px rgba(0, 0, 0, .25);
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  background: var(--bg);
  color: var(--text);
  font: 15px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
[hidden] { display: none !important; }

.wrap { max-width: 980px; margin: 0 auto; padding: 0 16px; }

header.top {
  position: sticky; top: 0; z-index: 10;
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
header.top .wrap { display: flex; align-items: center; gap: 12px; height: 56px; }
.brand { display: flex; align-items: center; gap: 8px; font-weight: 650; font-size: 17px; color: var(--text); }
.brand:hover { text-decoration: none; }
.brand svg { color: var(--accent); }
.spacer { flex: 1; }
.who { display: flex; align-items: center; gap: 8px; color: var(--muted); font-size: 14px; min-width: 0; }
.who img { width: 28px; height: 28px; border-radius: 50%; }
.who .email { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; max-width: 220px; }

button, .btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  font: inherit; font-size: 14px; font-weight: 550;
  padding: 8px 14px; border-radius: 8px; cursor: pointer;
  border: 1px solid var(--border); background: var(--surface); color: var(--text);
  transition: background .12s, border-color .12s;
  white-space: nowrap;
}
button:hover, .btn:hover { background: var(--surface-2); text-decoration: none; }
button:disabled { opacity: .5; cursor: default; }
.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.primary:hover { background: var(--accent-hover); }
.ghost { background: transparent; border-color: transparent; }
.danger { color: var(--danger); }
.danger:hover { background: var(--danger-soft); }
.small { padding: 5px 10px; font-size: 13px; }
.icon { padding: 6px; width: 32px; height: 32px; }
.big { padding: 12px 22px; font-size: 16px; border-radius: 10px; }

input, select, textarea {
  font: inherit; font-size: 14px; color: var(--text);
  background: var(--surface); border: 1px solid var(--border); border-radius: 8px;
  padding: 8px 10px; width: 100%;
}
input:focus, select:focus, textarea:focus, button:focus-visible {
  outline: 2px solid var(--accent); outline-offset: 1px;
}
label { font-size: 13px; color: var(--muted); display: block; margin-bottom: 4px; }

.card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); box-shadow: var(--shadow);
}

main { padding: 24px 0 64px; }
h1 { font-size: 22px; margin: 0 0 4px; letter-spacing: -.01em; }
h2 { font-size: 16px; margin: 0; }
.muted { color: var(--muted); }
.mono { font-family: var(--mono); font-size: 13px; }

/* --- drop zone --- */
.drop {
  border: 2px dashed var(--border); border-radius: var(--radius);
  background: var(--surface);
  padding: 36px 16px; text-align: center; cursor: pointer;
  transition: border-color .15s, background .15s;
}
.drop:hover, .drop.over { border-color: var(--accent); background: var(--accent-soft); }
.drop svg { color: var(--accent); margin-bottom: 8px; }
.drop .title { font-size: 17px; font-weight: 600; }
.options {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 12px;
  margin-top: 14px; padding: 14px; background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius);
}

/* --- uploads --- */
.uploads { margin-top: 16px; display: grid; gap: 10px; }
.up { padding: 12px 14px; }
.up .row { display: flex; align-items: center; gap: 10px; }
.up .name { font-weight: 550; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; flex: 1; min-width: 0; }
.up .stat { font-size: 13px; color: var(--muted); white-space: nowrap; }
.bar { height: 6px; background: var(--surface-2); border-radius: 99px; overflow: hidden; margin-top: 8px; }
.bar > i { display: block; height: 100%; width: 0; background: var(--accent); border-radius: 99px; transition: width .3s; }
.up.done .bar > i { background: var(--ok); }
.up.err .bar > i { background: var(--danger); }
.up .msg { font-size: 13px; margin-top: 6px; color: var(--danger); }

/* --- file list --- */
.section-head { display: flex; align-items: center; gap: 10px; margin: 32px 0 12px; flex-wrap: wrap; }
.files { display: grid; gap: 8px; }
.file {
  display: grid; grid-template-columns: 40px 1fr auto; gap: 12px; align-items: center;
  padding: 12px 14px;
}
.ficon {
  width: 40px; height: 40px; border-radius: 10px; display: grid; place-items: center;
  background: var(--accent-soft); color: var(--accent); font-size: 11px; font-weight: 700;
  text-transform: uppercase; letter-spacing: .02em;
}
.fmain { min-width: 0; }
.fname { font-weight: 550; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.fmeta { font-size: 13px; color: var(--muted); display: flex; gap: 6px 12px; flex-wrap: wrap; margin-top: 2px; }
.factions { display: flex; gap: 4px; }
.tag {
  display: inline-flex; align-items: center; gap: 4px;
  font-size: 12px; font-weight: 550; padding: 1px 8px; border-radius: 99px;
  background: var(--surface-2); color: var(--muted);
}
.tag.lock { background: var(--warn-soft); color: var(--warn); }
.tag.ok { background: var(--ok-soft); color: var(--ok); }
.tag.bad { background: var(--danger-soft); color: var(--danger); }
.empty { padding: 40px 16px; text-align: center; color: var(--muted); }

/* --- dialogs --- */
dialog {
  border: 1px solid var(--border); border-radius: 14px; padding: 0;
  background: var(--surface); color: var(--text); box-shadow: var(--shadow);
  width: min(520px, calc(100vw - 32px));
}
dialog::backdrop { background: rgba(10, 12, 16, .45); }
dialog form, dialog .body { padding: 20px; display: grid; gap: 14px; }
dialog .actions { display: flex; justify-content: flex-end; gap: 8px; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.copyrow { display: flex; gap: 6px; }
.copyrow input { font-family: var(--mono); font-size: 12px; }

/* --- toast --- */
#toast {
  position: fixed; left: 50%; bottom: 24px; transform: translateX(-50%) translateY(20px);
  background: var(--text); color: var(--bg); padding: 10px 16px; border-radius: 10px;
  font-size: 14px; opacity: 0; pointer-events: none; transition: all .2s; z-index: 100;
  max-width: calc(100vw - 32px);
}
#toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* --- sign-in & download pages --- */
.centre { min-height: calc(100vh - 56px); display: grid; place-items: center; padding: 24px 16px; }
.panel { width: min(480px, 100%); padding: 32px 28px; text-align: center; }
.panel .ficon { width: 64px; height: 64px; font-size: 14px; margin: 0 auto 16px; border-radius: 16px; }
.panel h1 { word-break: break-word; }
.panel .size { font-size: 15px; color: var(--muted); margin-bottom: 20px; }
.panel form { display: grid; gap: 10px; text-align: left; margin-bottom: 4px; }
.panel .stack { display: grid; gap: 10px; }
.panel .err { color: var(--danger); font-size: 14px; }
.panel details { text-align: left; margin-top: 18px; font-size: 13px; }
.panel summary { cursor: pointer; color: var(--muted); }
.panel pre {
  background: var(--surface-2); border-radius: 8px; padding: 10px; overflow-x: auto;
  font-family: var(--mono); font-size: 12px; white-space: pre-wrap; word-break: break-all;
}
.google { gap: 10px; }
.google svg { flex: none; }

@media (max-width: 600px) {
  .file { grid-template-columns: 36px 1fr; }
  .ficon { width: 36px; height: 36px; }
  .factions { grid-column: 1 / -1; justify-content: flex-end; }
  .grid2 { grid-template-columns: 1fr; }
  .who .email { display: none; }
  .panel { padding: 24px 18px; }
}