:root {
  --bg: #0d1117;
  --card-bg: #161b22;
  --border: #30363d;
  --text: #c9d1d9;
  --muted: #8b949e;
  --accent-1: #6a1b9a;
  --accent-2: #b24392;
  --weak: #ff4d4d;
  --medium: #ffcc00;
  --strong: #39d353;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  padding: 24px;
}

.card {
  width: 100%;
  max-width: 480px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 32px;
}

h1 {
  margin: 0 0 4px;
  font-size: 1.5rem;
  background: linear-gradient(90deg, var(--accent-1), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.subtitle {
  margin: 0 0 24px;
  color: var(--muted);
  font-size: 0.85rem;
}

.input-row {
  display: flex;
  gap: 8px;
}

#pwInput {
  flex: 1;
  padding: 12px 14px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-size: 1rem;
}

#pwInput:focus {
  outline: none;
  border-color: var(--accent-2);
}

#toggleBtn {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  cursor: pointer;
  padding: 0 14px;
}

.meter {
  margin-top: 16px;
  height: 8px;
  background: var(--bg);
  border-radius: 999px;
  overflow: hidden;
}

.meter-fill {
  height: 100%;
  width: 0%;
  background: var(--weak);
  transition: width 0.25s ease, background 0.25s ease;
}

.strength-label {
  margin: 8px 0 0;
  font-size: 0.85rem;
  color: var(--muted);
}

.stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-top: 20px;
}

.stat {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px;
  text-align: center;
}

.stat-label {
  display: block;
  font-size: 0.7rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.stat-value {
  display: block;
  margin-top: 4px;
  font-weight: 600;
  font-size: 0.95rem;
}

.issues {
  list-style: none;
  padding: 0;
  margin: 20px 0 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.issues li {
  background: var(--bg);
  border-left: 3px solid var(--weak);
  padding: 8px 12px;
  border-radius: 4px;
  font-size: 0.82rem;
}

.issues li.ok {
  border-left-color: var(--strong);
}

footer {
  margin-top: 24px;
  text-align: center;
}

footer a {
  color: var(--accent-2);
  text-decoration: none;
  font-size: 0.8rem;
}

footer a:hover {
  text-decoration: underline;
}