:root {
  --bg: #f4f0ea;
  --panel: #ffffff;
  --ink: #222222;
  --muted: #6b6b6b;
  --accent: #0b4f6c;
  --accent-2: #e07a5f;
  --shadow: rgba(0, 0, 0, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "IBM Plex Sans", "Helvetica Neue", Arial, sans-serif;
  color: var(--ink);
  background: radial-gradient(circle at top left, #fef6e4, var(--bg));
}

.page {
  max-width: 900px;
  margin: 0 auto;
  padding: 40px 24px 80px;
}

.hero {
  margin-bottom: 32px;
}

.hero h1 {
  font-family: "IBM Plex Serif", "Georgia", serif;
  font-size: 36px;
  margin: 0 0 8px;
}

.hero p {
  color: var(--muted);
  margin: 0;
}

.panel {
  background: var(--panel);
  border-radius: 16px;
  padding: 20px;
  margin-bottom: 24px;
  box-shadow: 0 12px 30px var(--shadow);
}

form {
  display: grid;
  gap: 16px;
}

label {
  display: grid;
  gap: 8px;
  font-weight: 600;
}

input,
textarea {
  border: 1px solid #d9d2c7;
  border-radius: 10px;
  padding: 10px 12px;
  font-size: 14px;
  background: #fffdf9;
}

textarea {
  resize: vertical;
  min-height: 150px;
  font-family: "IBM Plex Mono", "Courier New", monospace;
}

.checkbox {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 500;
}

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

button {
  border: none;
  border-radius: 999px;
  padding: 10px 18px;
  font-size: 14px;
  font-weight: 600;
  background: var(--accent);
  color: white;
  cursor: pointer;
}

button#convert-only {
  background: var(--accent-2);
}

pre {
  background: #f7f3ee;
  border-radius: 12px;
  padding: 16px;
  font-size: 13px;
  overflow-x: auto;
  max-height: 400px;
}

@media (max-width: 600px) {
  .page {
    padding: 24px 16px 60px;
  }

  .hero h1 {
    font-size: 28px;
  }
}