:root {
  color-scheme: light;
  --bg: #f4f6fb;
  --card: #ffffff;
  --text: #1f2937;
  --muted: #4b5563;
  --primary: #2563eb;
  --danger: #dc2626;
  --shadow: 0 8px 22px rgba(15, 23, 42, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
}

.container {
  min-height: 100vh;
  padding: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.card {
  width: min(100%, 480px);
  background: var(--card);
  border-radius: 16px;
  box-shadow: var(--shadow);
  padding: 1.2rem;
}

h1,
h2,
h3 {
  margin-top: 0;
}

label {
  font-weight: 600;
  display: block;
  margin-bottom: 0.5rem;
}

input[type='password'] {
  width: 100%;
  padding: 0.8rem;
  border: 1px solid #d1d5db;
  border-radius: 10px;
  font-size: 1rem;
  margin-bottom: 0.75rem;
}

button,
.button-like {
  display: inline-block;
  width: 100%;
  margin-top: 0.5rem;
  border: none;
  border-radius: 12px;
  background: var(--primary);
  color: #fff;
  padding: 0.9rem;
  text-align: center;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
}

button:disabled {
  opacity: 0.7;
  cursor: wait;
}

.preview {
  width: 100%;
  border-radius: 12px;
  margin-top: 1rem;
  border: 1px solid #d1d5db;
}

.result {
  margin-top: 1rem;
  background: #f8fafc;
  border-radius: 12px;
  border: 1px solid #e5e7eb;
  padding: 0.9rem;
}

pre {
  white-space: pre-wrap;
  word-break: break-word;
  margin: 0 0 0.8rem;
  font-family: inherit;
}

.muted {
  color: var(--muted);
}

.error {
  color: var(--danger);
  margin-top: 0.75rem;
}

.hidden {
  display: none !important;
}