:root {
  --bg: #fbfbfa;
  --panel: #ffffff;
  --ink: #1a1a18;
  --muted: #6b6b66;
  --line: #e3e3df;
  --accent: #1f6feb;
  --accent-ink: #ffffff;
  --ok: #1a7f4b;
  --error: #c0392b;
  --radius: 10px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #131313;
    --panel: #1b1b1a;
    --ink: #ececea;
    --muted: #9a9a94;
    --line: #2e2e2c;
    --accent: #4c8dff;
    --accent-ink: #0d1117;
    --ok: #4ac07f;
    --error: #f2705c;
  }
}

* { box-sizing: border-box; }

/* Flex and grid rules would otherwise win over the hidden attribute. */
[hidden] { display: none !important; }

html {
  /* Installed on iOS/Android, there is no browser chrome to bounce against. */
  overscroll-behavior-y: contain;
}

body {
  margin: 0;
  padding: calc(3rem + env(safe-area-inset-top)) calc(1.25rem + env(safe-area-inset-right))
    calc(4rem + env(safe-area-inset-bottom)) calc(1.25rem + env(safe-area-inset-left));
  background: var(--bg);
  color: var(--ink);
  font: 15px/1.55 ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
  -webkit-tap-highlight-color: transparent;
}

main { max-width: 34rem; margin: 0 auto; }

header { margin-bottom: 1.75rem; }
h1 { margin: 0; font-size: 1.35rem; letter-spacing: -0.01em; font-weight: 620; }
h2 { margin: 0 0 .75rem; font-size: .95rem; font-weight: 600; }
.tagline { margin: .25rem 0 0; color: var(--muted); font-size: .9rem; }
footer { margin-top: 2.5rem; padding-top: 1rem; border-top: 1px solid var(--line); }

.hint { color: var(--muted); font-size: .82rem; }
code { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: .85em; }

/* dropzone */
.drop {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: .3rem;
  min-height: 8.5rem;
  padding: 1.5rem;
  border: 1.5px dashed var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  color: var(--muted);
  text-align: center;
  cursor: pointer;
  transition: border-color .15s, color .15s, background .15s;
}
.drop:hover, .drop:focus-visible { border-color: var(--accent); color: var(--ink); outline: none; }
.drop.over { border-color: var(--accent); background: color-mix(in srgb, var(--accent) 7%, var(--panel)); }
.drop.has-file { border-style: solid; color: var(--ink); }
.drop.has-file #drop-label {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: .9rem;
  word-break: break-all;
}

/* multi-file picker */
.file-list { list-style: none; margin: .6rem 0 0; padding: 0; }
.file-list li {
  display: flex; align-items: center; gap: .75rem;
  padding: .4rem 0; border-bottom: 1px solid var(--line); font-size: .85rem;
}
.file-list li:last-child { border-bottom: none; }
.file-list-name { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.file-list-size { color: var(--muted); font-variant-numeric: tabular-nums; }

/* options */
.options {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(9.5rem, 1fr));
  gap: .75rem;
  margin-top: 1rem;
}
.options label { display: flex; flex-direction: column; gap: .3rem; font-size: .82rem; color: var(--muted); }
.options label.wide { grid-column: 1 / -1; }
.options em { font-style: normal; opacity: .7; }

select, input:not([type="checkbox"]) {
  width: 100%;
  padding: .5rem .6rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  color: var(--ink);
  font: inherit;
  font-size: .9rem;
}
select:focus, input:focus { outline: 2px solid var(--accent); outline-offset: -1px; border-color: transparent; }

/* iOS zooms the page in when a focused input's font is under 16px. */
@media (max-width: 480px) {
  select, input:not([type="checkbox"]) { font-size: 16px; padding: .65rem .6rem; }
  button { min-height: 3rem; }
}

/* buttons */
.actions { display: flex; align-items: center; gap: .6rem; margin-top: 1.1rem; flex-wrap: wrap; }

button {
  padding: .55rem 1rem;
  min-height: 2.75rem; /* comfortable touch target on phones */
  border: 1px solid transparent;
  border-radius: 8px;
  font: inherit;
  font-size: .9rem;
  font-weight: 550;
  cursor: pointer;
  touch-action: manipulation; /* skip the 300ms double-tap-to-zoom delay */
  transition: opacity .15s, background .15s;
}
button:disabled { opacity: .45; cursor: not-allowed; }
button:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.primary { background: var(--accent); color: var(--accent-ink); }
.primary:not(:disabled):hover { opacity: .88; }
.ghost { background: var(--panel); border-color: var(--line); color: var(--ink); }
.ghost:hover { border-color: var(--accent); }
.link-button {
  padding: 0; background: none; border: none; color: var(--muted);
  font-size: .82rem; text-decoration: underline; text-underline-offset: 2px;
}
.link-button:hover { color: var(--error); }

/* progress */
.progress { display: flex; align-items: center; gap: .7rem; margin-top: 1rem; }
.track { flex: 1; height: 4px; border-radius: 999px; background: var(--line); overflow: hidden; }
.bar { height: 100%; width: 0; border-radius: 999px; background: var(--accent); transition: width .2s linear; }
#progress-text, #file-progress-text { min-width: 8.5rem; text-align: right; font-variant-numeric: tabular-nums; }

.status { min-height: 1.2rem; margin: .8rem 0 0; font-size: .85rem; color: var(--muted); }
.status.ok { color: var(--ok); }
.status.error { color: var(--error); }

/* result */
.linkbox { display: flex; gap: .5rem; }
.linkbox input { flex: 1; min-width: 0; }
.field {
  display: flex; flex-direction: column; gap: .3rem;
  margin-bottom: .9rem; font-size: .82rem; color: var(--muted);
}
#link {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: .82rem;
}

/* recent */
#recent-wrap { margin-top: 2.25rem; padding-top: 1.25rem; border-top: 1px solid var(--line); }
.recent { list-style: none; margin: 0 0 .6rem; padding: 0; }
.recent li {
  display: flex; align-items: center; gap: .75rem;
  padding: .45rem 0; border-bottom: 1px solid var(--line); font-size: .85rem;
}
.recent li:last-child { border-bottom: none; }
.recent-name { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.recent-time { color: var(--muted); font-variant-numeric: tabular-nums; }

/* download card */
.card { padding: 1.25rem; border: 1px solid var(--line); border-radius: var(--radius); background: var(--panel); }
.filename {
  margin: 0 0 1rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: .95rem;
  word-break: break-all;
}
.facts { display: flex; flex-wrap: wrap; gap: 1.5rem; margin: 0 0 1.1rem; }
.facts div { display: flex; flex-direction: column; gap: .1rem; }
.facts dt { color: var(--muted); font-size: .75rem; text-transform: uppercase; letter-spacing: .04em; }
.facts dd { margin: 0; font-size: .9rem; font-variant-numeric: tabular-nums; }

.checkline {
  display: flex; align-items: center; gap: .45rem;
  margin-top: .7rem; color: var(--muted); font-size: .82rem;
}
.checkline input { accent-color: var(--accent); }
.card h2 { margin-top: 0; }
.card .hint { margin: 0 0 .9rem; }
.card .linkbox { margin-bottom: .2rem; }
#password-out, #gate-token {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: .85rem;
}
.options .linkbox { display: flex; gap: .5rem; }