:root {
  --bg: #f6f7f9;
  --card: #ffffff;
  --fg: #1a1d21;
  --muted: #5c6570;
  --border: #e3e7ec;
  --accent: #2563eb;
  --accent-fg: #ffffff;
  --good: #0f9d58;
  --good-bg: #eaf6ee;
  --note-bg: #fff8e6;
  --note-border: #f2d98a;
  --code-bg: #f2f4f7;
  --shadow: 0 1px 2px rgba(16, 24, 40, .04), 0 8px 24px rgba(16, 24, 40, .06);
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1216;
    --card: #171b21;
    --fg: #e6e9ee;
    --muted: #97a1ad;
    --border: #262c34;
    --accent: #4f8cff;
    --accent-fg: #0b1220;
    --good: #4ade80;
    --good-bg: #16241b;
    --note-bg: #241f10;
    --note-border: #4a3f1c;
    --code-bg: #0f1319;
    --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 12px 32px rgba(0, 0, 0, .35);
  }
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.55 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  padding: 32px 20px 64px;
  display: flex;
  justify-content: center;
}
.wrap { width: 100%; max-width: 760px; }

header { text-align: center; margin-bottom: 24px; }
h1 {
  font-size: 34px; margin: 0 0 6px;
  letter-spacing: -0.02em;
}
h1 .mono { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; }
.tagline { color: var(--muted); font-size: 16px; margin: 0; }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: var(--shadow);
  padding: 22px;
  margin-bottom: 18px;
}

.note {
  background: var(--note-bg);
  border: 1px solid var(--note-border);
  border-radius: 10px;
  padding: 12px 14px;
  font-size: 14.5px;
  margin-bottom: 18px;
}
.note b { font-weight: 650; }

.drop {
  border: 2px dashed var(--border);
  border-radius: 12px;
  padding: 30px 20px 26px;
  text-align: center;
  cursor: pointer;
  transition: border-color .15s, background .15s, transform .05s;
  background: transparent;
}
.drop:hover { border-color: var(--accent); }
.drop:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.drop.drag {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 10%, transparent);
  transform: scale(1.01);
}
.drop .drop-icon { font-size: 34px; line-height: 1; margin-bottom: 10px; }
.drop .big { font-size: 17px; font-weight: 600; margin-bottom: 6px; }
.drop .sub { color: var(--muted); font-size: 13px; margin: 6px 0 12px; letter-spacing: .04em; }
.drop .choose { pointer-events: auto; }
.drop.drag * { pointer-events: none; }
.drop code {
  background: var(--code-bg); border: 1px solid var(--border);
  border-radius: 5px; padding: 1px 5px; font-size: 13px;
}

.privacy {
  display: flex; align-items: center; gap: 8px;
  justify-content: center;
  color: var(--muted); font-size: 13.5px;
  margin-top: 14px;
}
.dot { width: 8px; height: 8px; border-radius: 50%; background: var(--good); box-shadow: 0 0 0 3px var(--good-bg); }

.result { display: none; }
.result.show { display: block; }

.filerow {
  display: flex; align-items: baseline; justify-content: space-between;
  gap: 12px; flex-wrap: wrap; margin-bottom: 14px;
}
.filename { font-weight: 600; word-break: break-all; }
.filename .badge {
  display: inline-block; margin-left: 8px; font-size: 12px; font-weight: 600;
  color: var(--good); background: var(--good-bg); border-radius: 999px;
  padding: 2px 9px; vertical-align: middle;
}

.stats {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 10px; margin-bottom: 16px;
}
.stat {
  background: var(--code-bg); border: 1px solid var(--border);
  border-radius: 10px; padding: 12px; text-align: center;
}
.stat .num { font-size: 20px; font-weight: 700; letter-spacing: -0.01em; }
.stat .lbl { color: var(--muted); font-size: 12px; margin-top: 2px; }
.stat.save .num { color: var(--good); }

.actions { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 14px; }
button {
  font: inherit; font-weight: 600; cursor: pointer;
  border-radius: 10px; padding: 10px 16px; border: 1px solid var(--border);
  background: var(--card); color: var(--fg);
  transition: transform .05s, background .15s, border-color .15s;
}
button:active { transform: translateY(1px); }
button.primary { background: var(--accent); color: var(--accent-fg); border-color: transparent; }
button.ghost { background: transparent; }

pre.preview {
  margin: 0; max-height: 380px; overflow: auto;
  background: var(--code-bg); border: 1px solid var(--border);
  border-radius: 10px; padding: 14px;
  font: 13px/1.5 ui-monospace, SFMono-Regular, Menlo, monospace;
  white-space: pre; tab-size: 2;
}

.error {
  display: none; color: #b42318; background: #fef3f2;
  border: 1px solid #fda29b; border-radius: 10px; padding: 12px 14px;
  font-size: 14px; margin-top: 12px;
}
@media (prefers-color-scheme: dark) {
  .error { color: #ffb4ab; background: #2a1513; border-color: #5a241f; }
}
.error.show { display: block; }

.how { font-size: 14.5px; color: var(--muted); }
.how ol { margin: 8px 0 0; padding-left: 20px; }
.how li { margin: 4px 0; }
.how code {
  background: var(--code-bg); border: 1px solid var(--border);
  border-radius: 5px; padding: 1px 5px; font-size: 12.5px;
}

footer {
  text-align: center; color: var(--muted); font-size: 13px; margin-top: 26px;
}
footer a { color: var(--muted); }
a { color: var(--accent); }

@media (max-width: 520px) {
  .stats { grid-template-columns: 1fr; }
  h1 { font-size: 28px; }
}