:root {
  --bg: #0f1115;
  --panel: #171a21;
  --panel-2: #1e222b;
  --fg: #e6e8ec;
  --muted: #8a93a6;
  --accent: #7cc4ff;
  --border: #272b35;
  --c1: #c5a3ff;
  --c2: #9ae6b4;
  --c3: #f5c26b;
  --c4: #ff9ec7;
  --c5: #ff6b6b;
}

* { box-sizing: border-box; }

html, body {
  margin: 0; padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Sans",
    "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;
  font-size: 15px;
  line-height: 1.6;
}

header {
  padding: 24px 32px 8px;
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 8px;
  border-bottom: 1px solid var(--border);
}
header h1 { margin: 0; font-size: 22px; }
header #subtitle {
  grid-column: 1 / 2;
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 14px;
}
.lang-switch {
  grid-column: 2 / 3;
  grid-row: 1 / 3;
  display: flex;
  align-items: center;
  gap: 6px;
}

main {
  padding: 24px 32px 48px;
  max-width: 1000px;
  margin: 0 auto;
}

.controls { margin-bottom: 20px; }

#search-input {
  width: 100%;
  padding: 12px 16px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--fg);
  font-size: 15px;
  font-family: inherit;
  margin-bottom: 14px;
}
#search-input:focus { outline: none; border-color: var(--accent); }

.category-wrap {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
}
#category-label {
  color: var(--muted);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.categories {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}
.cat-btn {
  padding: 5px 12px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--muted);
  font-size: 12px;
  cursor: pointer;
  font-family: inherit;
}
.cat-btn:hover { color: var(--fg); }
.cat-btn.active {
  background: var(--accent);
  color: #0b1320;
  border-color: var(--accent);
  font-weight: 700;
}

select {
  padding: 8px 10px;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--fg);
  font-size: 13px;
}
label {
  color: var(--muted);
  font-size: 11px;
}

.list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.code-row {
  display: grid;
  grid-template-columns: 80px 1fr auto;
  gap: 16px;
  align-items: center;
  padding: 12px 18px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
}

.code-number {
  font-family: "SF Mono", Menlo, Consolas, monospace;
  font-size: 22px;
  font-weight: 700;
  text-align: center;
}
.cat-1xx .code-number { color: var(--c1); }
.cat-2xx .code-number { color: var(--c2); }
.cat-3xx .code-number { color: var(--c3); }
.cat-4xx .code-number { color: var(--c4); }
.cat-5xx .code-number { color: var(--c5); }

.code-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--fg);
  margin-bottom: 2px;
}

.code-desc {
  font-size: 13px;
  color: var(--muted);
}

.code-rfc {
  font-family: "SF Mono", Menlo, Consolas, monospace;
  font-size: 11px;
  color: var(--muted);
  white-space: nowrap;
}

.empty {
  text-align: center;
  color: var(--muted);
  padding: 48px 0;
  font-style: italic;
}

footer {
  padding: 24px 32px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 12px;
  text-align: center;
}

@media (max-width: 600px) {
  .code-row { grid-template-columns: 60px 1fr; }
  .code-rfc { grid-column: 1 / -1; text-align: right; }
}