:root {
  --bg: #0f1419;
  --bg-card: #131920;
  --fg: #d8dde6;
  --accent: #4cc2ff;
  --border: #2a3340;
  --error: #ff6b6b;
  --muted: #8893a4;
}
* { box-sizing: border-box; }
body {
  background: var(--bg); color: var(--fg);
  font-family: -apple-system, "Segoe UI", Roboto, Ubuntu, system-ui, sans-serif;
  margin: 0; min-height: 100vh; display: flex; flex-direction: column;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
code {
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  background: #1a2128; padding: 2px 6px; border-radius: 3px; font-size: 13px;
}
header {
  display: flex; justify-content: space-between; align-items: center;
  padding: 14px 24px; border-bottom: 1px solid var(--border); background: #0a0e13;
}
.brand { font-weight: 600; color: var(--accent); }
header .user { font-size: 13px; color: var(--muted); }
header .user .role {
  background: #1a2128; padding: 2px 8px; border-radius: 10px;
  font-size: 11px; margin-left: 6px; color: var(--accent);
}
main { flex: 1; max-width: 880px; margin: 0 auto; padding: 32px 24px; width: 100%; }
footer {
  padding: 14px 24px; border-top: 1px solid var(--border);
  text-align: center; font-size: 12px; color: var(--muted);
}
h2 { font-weight: 500; margin-top: 0; color: var(--fg); }
.flash {
  list-style: none; padding: 12px 16px; margin: 0 0 16px;
  background: rgba(255, 107, 107, 0.1); border: 1px solid var(--error);
  border-radius: 4px; color: var(--error);
}
.empty {
  padding: 32px; background: var(--bg-card);
  border: 1px dashed var(--border); border-radius: 6px;
  text-align: center; color: var(--muted);
}
form.login {
  display: flex; flex-direction: column; gap: 14px; max-width: 360px;
  margin: 40px auto 0; padding: 28px;
  background: var(--bg-card); border: 1px solid var(--border); border-radius: 8px;
}
form.login label { display: flex; flex-direction: column; gap: 4px; font-size: 13px; color: var(--muted); }
form.login input {
  padding: 10px 12px; background: #1a2128; border: 1px solid var(--border);
  border-radius: 4px; color: var(--fg); font-size: 15px;
}
form.login input:focus { outline: none; border-color: var(--accent); }
form.login button {
  padding: 12px; background: var(--accent); color: #0f1419;
  border: 0; border-radius: 4px; font-weight: 600; font-size: 15px;
  cursor: pointer; margin-top: 6px;
}
form.login button:hover { filter: brightness(1.1); }
.hint { font-size: 13px; color: var(--muted); margin-top: 14px; line-height: 1.6; }
.otp-grid {
  display: grid; gap: 14px;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}
.otp-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: 8px; padding: 18px; text-align: center;
}
.ssh-user {
  font-size: 12px; text-transform: uppercase; letter-spacing: 0.1em;
  color: var(--muted); margin-bottom: 12px;
}
.code {
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 56px; letter-spacing: 0.16em; color: var(--accent); font-weight: 600;
}
.code.error { color: var(--error); font-size: 32px; }
.error-msg { font-size: 13px; color: var(--error); margin-top: 8px; }
.countdown { margin-top: 24px; text-align: center; font-size: 13px; color: var(--muted); }
.bar {
  margin-top: 8px; height: 4px; background: var(--border);
  border-radius: 2px; overflow: hidden;
  max-width: 240px; margin-left: auto; margin-right: auto;
}
.bar-fill { height: 100%; background: var(--accent); transition: width 1s linear; }