:root {
  color-scheme: dark;
  --bg: #121417;
  --card: #1b1f24;
  --border: #2c333c;
  --text: #e8eaed;
  --muted: #9aa3ad;
  --accent: #7dcea0;
  --accent-text: #102016;
  --error: #f2a3a3;
  --error-bg: #3a1f22;
  --focus: #8ab4ff;
  --radius: 12px;
  font-family: "Segoe UI", system-ui, sans-serif;
}

@media (prefers-color-scheme: light) {
  :root {
    color-scheme: light;
    --bg: #f4f6f8;
    --card: #ffffff;
    --border: #d7dee6;
    --text: #1a1f24;
    --muted: #5b6570;
    --accent: #1f7a4c;
    --accent-text: #ffffff;
    --error: #9b1c1c;
    --error-bg: #fdecec;
    --focus: #1a5fb4;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}

.page {
  max-width: 1100px;
  margin: 0 auto;
  padding: 2rem 1.25rem 3rem;
}

.header {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: flex-start;
  margin-bottom: 1.25rem;
}

h1,
h2 {
  margin: 0 0 0.35rem;
  font-weight: 650;
  letter-spacing: -0.02em;
}

h1 {
  font-size: 1.65rem;
}

h2 {
  font-size: 1.1rem;
}

.lede,
.hint,
.footer,
.meta {
  color: var(--muted);
  margin: 0;
}

.lede {
  max-width: 42rem;
}

.ghost-link,
.secondary,
button {
  font: inherit;
}

.ghost-link {
  color: var(--text);
  text-decoration: none;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.45rem 0.85rem;
  white-space: nowrap;
}

.ghost-link:hover {
  border-color: var(--accent);
}

.notice {
  background: var(--card);
  border: 1px solid var(--accent);
  border-radius: var(--radius);
  padding: 0.85rem 1rem;
  margin: 0 0 1.25rem;
}

.grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.1rem 1.15rem 1.2rem;
}

.card-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 0.75rem;
}

label {
  display: block;
  font-size: 0.9rem;
  margin: 0.9rem 0 0.35rem;
}

input,
textarea,
.output {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
  color: var(--text);
  font: 0.92rem/1.45 ui-monospace, "Cascadia Code", Consolas, monospace;
  padding: 0.7rem 0.8rem;
}

textarea {
  resize: vertical;
  min-height: 10rem;
}

input:focus,
textarea:focus,
button:focus-visible,
.ghost-link:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 2px;
}

button {
  margin-top: 1rem;
  background: var(--accent);
  color: var(--accent-text);
  border: 0;
  border-radius: 8px;
  padding: 0.7rem 1rem;
  font-weight: 650;
  cursor: pointer;
}

button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.secondary {
  margin-top: 0;
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}

.secondary:hover,
button:not(:disabled):hover {
  filter: brightness(1.05);
}

.error {
  margin: 0.85rem 0 0;
  padding: 0.7rem 0.8rem;
  background: var(--error-bg);
  color: var(--error);
  border-radius: 8px;
}

.meta {
  margin: 0.75rem 0;
  font-size: 0.85rem;
}

.output {
  min-height: 16rem;
  overflow: auto;
  white-space: pre-wrap;
  word-break: break-word;
  margin: 0.75rem 0 0;
}

.output.empty {
  color: var(--muted);
  font-family: inherit;
}

.footer {
  margin-top: 1.5rem;
  font-size: 0.92rem;
}

code {
  font-family: ui-monospace, "Cascadia Code", Consolas, monospace;
}

@media (max-width: 800px) {
  .header {
    flex-direction: column;
  }

  .grid {
    grid-template-columns: 1fr;
  }
}