:root {
  --bg: #f6f7f9;
  --card: #ffffff;
  --text: #14161a;
  --muted: #667085;
  --line: #dfe3e8;
  --accent: #2f6feb;
  --accent-text: #ffffff;
  --ok-bg: #e7f7ed;
  --ok-line: #58b77e;
  --err-bg: #fdeceb;
  --err-line: #dc6b64;
  --warn-bg: #fff8e6;
  --warn-line: #e0b44a;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14161a;
    --card: #1c1f25;
    --text: #e8eaed;
    --muted: #9aa2ad;
    --line: #2c313a;
    --accent: #4f88f7;
    --ok-bg: #16261d;
    --ok-line: #3f8a5f;
    --err-bg: #2a1a19;
    --err-line: #b25650;
    --warn-bg: #2a2415;
    --warn-line: #9c7c2e;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  padding: 32px 16px 64px;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.55 -apple-system, "Segoe UI", Roboto, sans-serif;
}

main { max-width: 640px; margin: 0 auto; }

h1 { font-size: 26px; margin: 0 0 8px; }
h2 { font-size: 18px; margin: 0 0 8px; }

.lead { color: var(--muted); margin: 0 0 20px; }

.warning {
  background: var(--warn-bg);
  border: 1px solid var(--warn-line);
  border-radius: 10px;
  padding: 14px 16px;
  font-size: 14px;
  margin-bottom: 24px;
}

form {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.row { display: flex; gap: 16px; flex-wrap: wrap; }
.row > label { flex: 1 1 220px; }

label { display: block; font-weight: 600; font-size: 14px; }

input[type="text"], input[type="password"] {
  width: 100%;
  margin-top: 6px;
  padding: 10px 12px;
  font: inherit;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 8px;
}

input:focus-visible, .drop:focus-visible, button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

small { display: block; margin-top: 5px; font-weight: 400; color: var(--muted); font-size: 12.5px; }

.modes {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 12px 14px;
  margin: 0;
}

.modes legend { font-size: 13px; font-weight: 600; color: var(--muted); padding: 0 6px; }

.radio {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-weight: 400;
  padding: 4px 0;
  cursor: pointer;
}

.drop {
  border: 2px dashed var(--line);
  border-radius: 10px;
  padding: 26px 16px;
  text-align: center;
  color: var(--muted);
  cursor: pointer;
  transition: border-color .15s, background .15s;
}

.drop:hover, .drop.over { border-color: var(--accent); background: var(--bg); }
.drop.filled { border-style: solid; border-color: var(--ok-line); color: var(--text); }

.actions { display: flex; gap: 12px; flex-wrap: wrap; }

button {
  flex: 1 1 160px;
  padding: 11px 18px;
  font: inherit;
  font-weight: 600;
  border-radius: 8px;
  border: 1px solid var(--accent);
  background: var(--accent);
  color: var(--accent-text);
  cursor: pointer;
}

button.secondary { background: transparent; color: var(--accent); }
button:disabled { opacity: .55; cursor: default; }

.progress-wrap { display: flex; align-items: center; gap: 12px; margin-top: 18px; }

.progress {
  flex: 1;
  height: 8px;
  background: var(--line);
  border-radius: 99px;
  overflow: hidden;
}

.progress > div { width: 0; height: 100%; background: var(--accent); transition: width .15s; }

#progressText { font-variant-numeric: tabular-nums; color: var(--muted); font-size: 14px; }

.result {
  margin-top: 18px;
  padding: 14px 16px;
  border-radius: 10px;
  border: 1px solid var(--line);
  font-size: 14.5px;
  white-space: pre-wrap;
}

.result.ok { background: var(--ok-bg); border-color: var(--ok-line); }
.result.err { background: var(--err-bg); border-color: var(--err-line); }

.local { margin-top: 40px; color: var(--muted); font-size: 14px; }

pre {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 14px;
  overflow-x: auto;
  font-size: 13px;
}

code { font-family: "Cascadia Code", Consolas, monospace; }
a { color: var(--accent); }