:root {
  --bg: #0d1117;
  --surface: #161b22;
  --surface2: #21262d;
  --border: #30363d;
  --text: #e6edf3;
  --muted: #8b949e;
  --accent: #58a6ff;
  --accent-dim: #1f3a5f;
  --green: #3fb950;
  --radius: 10px;
  --font: "Segoe UI", system-ui, -apple-system, sans-serif;
  --mono: "Cascadia Code", "Fira Code", Consolas, monospace;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  min-height: 100vh;
}

a {
  color: var(--accent);
}

header {
  border-bottom: 1px solid var(--border);
  padding: 1.25rem 1.5rem;
  background: var(--surface);
}

header h1 {
  margin: 0;
  font-size: 1.35rem;
  font-weight: 600;
}

header p {
  margin: 0.35rem 0 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
  max-width: 1200px;
  margin: 0 auto;
  padding: 1.25rem 1.5rem 2rem;
}

@media (max-width: 900px) {
  .layout {
    grid-template-columns: 1fr;
  }
}

.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
}

.panel h2 {
  margin: 0 0 1rem;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
  font-weight: 600;
}

.field {
  margin-bottom: 1rem;
}

.field label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 0.35rem;
}

.field .hint {
  font-size: 0.75rem;
  color: var(--muted);
  margin-top: 0.25rem;
}

input[type="text"],
input[type="url"],
input[type="number"],
select,
textarea {
  width: 100%;
  padding: 0.55rem 0.7rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font-size: 0.9rem;
  font-family: inherit;
}

input:focus,
select:focus,
textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-dim);
}

textarea {
  min-height: 4.5rem;
  resize: vertical;
  font-family: var(--mono);
  font-size: 0.82rem;
}

.row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}

.presets {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.preset-btn {
  padding: 0.4rem 0.75rem;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font-size: 0.8rem;
  cursor: pointer;
}

.preset-btn:hover {
  border-color: var(--accent);
  background: var(--accent-dim);
}

.check-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.35rem 1rem;
}

@media (max-width: 600px) {
  .check-grid,
  .row {
    grid-template-columns: 1fr;
  }
}

.check-item {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  font-size: 0.85rem;
  cursor: pointer;
}

.check-item input {
  margin-top: 0.2rem;
  accent-color: var(--accent);
}

.check-item span {
  color: var(--muted);
  font-size: 0.75rem;
  display: block;
}

.mode-tabs {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.mode-tab {
  flex: 1;
  padding: 0.6rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--muted);
  font-size: 0.9rem;
  cursor: pointer;
  text-align: center;
}

.mode-tab.active {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-dim);
}

.output-panel {
  position: sticky;
  top: 1rem;
}

.command-box {
  position: relative;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem 1rem 2.5rem;
  font-family: var(--mono);
  font-size: 0.82rem;
  line-height: 1.6;
  white-space: pre-wrap;
  word-break: break-all;
  min-height: 8rem;
}

.copy-btn {
  position: absolute;
  bottom: 0.6rem;
  right: 0.6rem;
  padding: 0.35rem 0.75rem;
  background: var(--accent);
  color: #0d1117;
  border: none;
  border-radius: 6px;
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
}

.copy-btn:hover {
  filter: brightness(1.1);
}

.copy-btn.copied {
  background: var(--green);
}

.install-line {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
  font-size: 0.85rem;
  color: var(--muted);
}

.install-line code {
  display: block;
  margin-top: 0.35rem;
  padding: 0.5rem 0.7rem;
  background: var(--bg);
  border-radius: 6px;
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--text);
}

.hidden {
  display: none !important;
}

.section-divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 1.25rem 0;
}

footer {
  text-align: center;
  padding: 1.5rem;
  color: var(--muted);
  font-size: 0.8rem;
  border-top: 1px solid var(--border);
}