:root {
  --bg: #fbfbfa;
  --fg: #1c1c1a;
  --muted: #6b6b66;
  --border: #d7d7d2;
  --panel: #ffffff;
  --accent: #a2553a;
  --error: #b3261e;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #17171a;
    --fg: #e7e7e4;
    --muted: #9a9a95;
    --border: #35353a;
    --panel: #1f1f23;
    --accent: #d99a7f;
    --error: #f2b8b5;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 1.5rem;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  background: var(--bg);
  color: var(--fg);
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: 15px;
}

header {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
}

h1 {
  margin: 0;
  font-size: 1.4rem;
  letter-spacing: -0.02em;
}

h2 {
  margin: 0;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.version {
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

a {
  margin-left: auto;
  color: var(--accent);
}

.controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
}

.controls label {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--muted);
}

.controls .flag {
  color: var(--fg);
  cursor: pointer;
}

select {
  padding: 0.35rem 0.5rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--panel);
  color: var(--fg);
  font: inherit;
}

.status {
  margin: 0;
  min-height: 1.2em;
  color: var(--error);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.85rem;
  white-space: pre-wrap;
}

main {
  flex: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  min-height: 60vh;
}

@media (max-width: 720px) {
  main {
    grid-template-columns: 1fr;
  }
}

.panel {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  min-height: 0;
}

textarea {
  flex: 1;
  padding: 0.75rem;
  resize: none;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--panel);
  color: var(--fg);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 13px;
  line-height: 1.5;
  tab-size: 2;
}

textarea:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: -1px;
}

.binary {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  border: 1px dashed var(--border);
  border-radius: 8px;
  background: var(--panel);
  color: var(--muted);
}

.binary[hidden] {
  display: none;
}

button {
  padding: 0.45rem 0.9rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg);
  color: var(--fg);
  font: inherit;
  cursor: pointer;
}

button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

footer {
  color: var(--muted);
  font-size: 0.8rem;
}