:root {
  --bg: #0e1116;
  --panel: #161b22;
  --panel-2: #1f2630;
  --border: #2a313c;
  --text: #e6edf3;
  --muted: #8b949e;
  --accent: #3b82f6;
  --accent-2: #60a5fa;
  --ok: #34d399;
  --err: #f87171;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  min-height: 100vh;
}

main {
  max-width: 520px;
  margin: 0 auto;
  padding: 40px 20px 60px;
}

h1 {
  font-size: 26px;
  font-weight: 600;
  margin: 0 0 24px;
  letter-spacing: -0.01em;
}

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  margin-bottom: 16px;
}
.card.hidden { display: none; }
.card h2 { margin: 0 0 6px; font-size: 18px; }

.muted { color: var(--muted); }
.small { font-size: 12px; }
.ok { color: var(--ok); }
.err { color: var(--err); }
code {
  background: var(--panel-2);
  padding: 1px 5px;
  border-radius: 3px;
  font-size: 12px;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
}

label { display: block; margin: 14px 0 0; }
label > span:first-child {
  display: block;
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 4px;
}

input[type=text], input[type=password], input[type=file] {
  width: 100%;
  background: var(--panel-2);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 10px 12px;
  border-radius: 6px;
  font: inherit;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
}
input:focus { outline: none; border-color: var(--accent); }

.pw-row { display: flex; gap: 8px; align-items: stretch; }
.pw-row input { flex: 1; }

button {
  font: inherit;
  cursor: pointer;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--panel-2);
  color: var(--text);
  padding: 10px 16px;
}
button.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: white;
  font-weight: 600;
}
button.primary:hover { background: var(--accent-2); }
button.primary.huge {
  width: 100%;
  padding: 22px;
  font-size: 20px;
  border-radius: 10px;
}
button.ghost { background: transparent; color: var(--muted); border-color: transparent; }
button.ghost:hover { color: var(--text); }
button:disabled { opacity: 0.6; cursor: not-allowed; }

.actions {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 20px;
}

#status {
  text-align: center;
  margin: 14px 0 0;
  min-height: 18px;
}

.footer {
  text-align: center;
  margin: 14px 0 0;
}
.footer a { color: var(--muted); text-decoration: none; border-bottom: 1px dotted var(--muted); }
.footer a:hover { color: var(--text); }

#result code {
  display: block;
  background: var(--panel-2);
  border: 1px solid var(--border);
  padding: 18px;
  border-radius: 8px;
  font-size: 22px;
  text-align: center;
  letter-spacing: 2px;
  margin: 8px 0 16px;
  word-break: break-all;
}
#result button { width: 100%; }