/* tn-labo.com 共通スタイル - 軽量・依存ゼロ */
:root {
  --bg: #f8fafc;
  --bg-soft: #eef3f9;
  --bg-elev: #ffffff;
  --fg: #132238;
  --fg-soft: #5d6b82;
  --border: #d5deea;
  --border-soft: #e8eef5;
  --primary: #0f5bd8;
  --primary-hover: #0a44a3;
  --accent: #0f9a8a;
  --highlight: #f59e0b;
  --danger: #cf222e;
  --warning: #9a6700;
  --code-bg: #f4f7fb;
  --shadow-sm: 0 1px 2px rgba(19,34,56,0.06);
  --shadow: 0 14px 36px rgba(19,34,56,0.08), 0 3px 10px rgba(19,34,56,0.06);
  --shadow-lg: 0 22px 48px rgba(19,34,56,0.14);
  --radius: 14px;
  --radius-sm: 6px;
  --header-h: 74px;
  --max-w: 1200px;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  --sans: "Aptos", "Segoe UI Variable", "Segoe UI", "Hiragino Sans", "Yu Gothic UI", Meiryo, sans-serif;
  --display: "Aptos Display", "Segoe UI Variable Display", "Hiragino Sans", "Yu Gothic UI", sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #09111d;
    --bg-soft: #101b2a;
    --bg-elev: #132238;
    --fg: #edf3fb;
    --fg-soft: #9db0c7;
    --border: #24364c;
    --border-soft: #1a293c;
    --primary: #7fb1ff;
    --primary-hover: #9ac2ff;
    --accent: #47c9b9;
    --highlight: #f7ba4d;
    --code-bg: #101b2a;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
    --shadow: 0 1px 3px rgba(0,0,0,0.4), 0 8px 24px rgba(0,0,0,0.3);
    --shadow-lg: 0 12px 28px rgba(0,0,0,0.5);
  }
}

* { box-sizing: border-box; }
html, body { padding: 0; margin: 0; }
body {
  font-family: var(--sans);
  background:
    radial-gradient(circle at top left, color-mix(in srgb, var(--primary) 14%, transparent), transparent 26%),
    radial-gradient(circle at top right, color-mix(in srgb, var(--accent) 14%, transparent), transparent 24%),
    linear-gradient(180deg, var(--bg), color-mix(in srgb, var(--bg-soft) 78%, var(--bg)));
  color: var(--fg);
  line-height: 1.7; font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }
code, pre, kbd { font-family: var(--mono); }
code { background: var(--code-bg); padding: 0.1em 0.35em; border-radius: 4px; font-size: 0.92em; }
pre { background: var(--code-bg); padding: 14px 16px; border-radius: var(--radius); overflow-x: auto; border: 1px solid var(--border); font-size: 0.9rem; line-height: 1.55; }
kbd { background: var(--bg-soft); border: 1px solid var(--border); border-bottom-width: 2px; border-radius: 4px; padding: 1px 6px; font-size: 0.8em; color: var(--fg-soft); }

/* ヘッダ */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: color-mix(in srgb, var(--bg-elev) 92%, transparent);
  border-bottom: 1px solid var(--border);
  height: var(--header-h);
  display: flex; align-items: center;
  backdrop-filter: saturate(180%) blur(10px);
  -webkit-backdrop-filter: saturate(180%) blur(10px);
  box-shadow: 0 12px 30px rgba(19,34,56,0.05);
}
.site-header .container {
  width: 100%; max-width: var(--max-w);
  margin: 0 auto; padding: 0 20px;
  display: flex; align-items: center; gap: 24px;
}
.brand {
  color: var(--fg); display: flex; align-items: center; gap: 12px;
  min-width: 0;
}
.brand:hover { text-decoration: none; }
.brand-mark {
  position: relative;
  width: 44px; height: 44px;
  background: linear-gradient(145deg, var(--primary), var(--accent) 62%, var(--highlight));
  border-radius: 16px; color: #fff;
  display: inline-flex; align-items: center; justify-content: center;
  box-shadow: 0 16px 28px rgba(15,91,216,0.22);
  flex-shrink: 0;
}
.brand-mark::before {
  content: '';
  position: absolute;
  inset: 3px;
  border-radius: 13px;
  background: linear-gradient(180deg, rgba(255,255,255,0.24), rgba(255,255,255,0.04));
}
.brand-mark-core {
  position: relative;
  z-index: 1;
  font-family: var(--display);
  font-weight: 800;
  font-size: 0.88rem;
  letter-spacing: 0.16em;
  text-indent: 0.16em;
}
.brand-mark-dot {
  position: absolute;
  top: -3px;
  right: -3px;
  width: 12px;
  height: 12px;
  border-radius: 999px;
  background: #fff;
  border: 3px solid color-mix(in srgb, var(--accent) 78%, white);
  box-shadow: 0 8px 20px rgba(19,34,56,0.14);
}
.brand-copy {
  display: flex;
  flex-direction: column;
  gap: 1px;
  min-width: 0;
}
.brand-name {
  font-family: var(--display);
  font-weight: 800;
  font-size: 1.04rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  white-space: nowrap;
}
.brand-sub {
  color: var(--fg-soft);
  font-size: 0.68rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  white-space: nowrap;
}
.nav { display: flex; gap: 22px; flex: 1; }
.nav a { color: var(--fg-soft); font-weight: 600; }
.nav a:hover { color: var(--primary); text-decoration: none; }
.search-box {
  margin-left: auto;
  position: relative;
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
  padding: 6px 8px 6px 12px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: color-mix(in srgb, var(--bg-elev) 90%, transparent);
  box-shadow: var(--shadow-sm);
}
.search-box:focus-within {
  border-color: color-mix(in srgb, var(--primary) 55%, var(--border));
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--primary) 12%, transparent), var(--shadow-sm);
}
.search-box .search-icon { color: var(--fg-soft); pointer-events: none; font-size: 1rem; }
.search-box .search-chip {
  border-radius: 999px;
  padding: 7px 12px;
  background: linear-gradient(135deg, color-mix(in srgb, var(--primary) 92%, white), color-mix(in srgb, var(--accent) 84%, white));
  color: #fff;
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  white-space: nowrap;
}
.search-box input {
  width: 320px; padding: 4px 0;
  border: none;
  background: transparent; color: var(--fg); font-size: 14px;
}
.search-box input::placeholder { color: color-mix(in srgb, var(--fg-soft) 82%, transparent); }
.search-box input:focus { outline: none; }
.search-result {
  position: absolute; top: calc(100% + 10px); right: 0;
  width: 100%; min-width: 380px; max-height: 440px; overflow: auto;
  background: var(--bg-elev); border: 1px solid var(--border);
  border-radius: var(--radius); box-shadow: var(--shadow-lg); z-index: 200;
}
.search-item { display: flex; flex-direction: column; padding: 10px 14px; border-bottom: 1px solid var(--border-soft); color: var(--fg); }
.search-item:last-child { border-bottom: none; }
.search-item:hover, .search-item.active { background: var(--bg-soft); text-decoration: none; }
.search-item span { font-size: 0.8rem; color: var(--fg-soft); }
.search-empty { padding: 16px; color: var(--fg-soft); text-align: center; }

.tool-mode-switch { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
.mode-hint { margin: 12px 0 0; color: var(--fg-soft); font-size: 0.95rem; }

/* レイアウト */
main { max-width: var(--max-w); margin: 0 auto; padding: 28px 20px 64px; }
h1 { font-size: 2rem; margin: 0 0 8px; line-height: 1.3; }
h2 { font-size: 1.4rem; margin: 32px 0 12px; }
h3 { font-size: 1.15rem; margin: 22px 0 8px; }
.lead { color: var(--fg-soft); font-size: 1.05rem; margin: 4px 0 24px; }

/* パンくず */
.breadcrumbs { font-size: 0.85rem; color: var(--fg-soft); margin: 0 0 12px; }
.breadcrumbs ol { list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: 6px; }
.breadcrumbs li::after { content: '›'; margin-left: 6px; color: var(--fg-soft); }
.breadcrumbs li:last-child::after { content: ''; }
.breadcrumbs a { color: var(--fg-soft); }
.breadcrumbs a:hover { color: var(--primary); }
.breadcrumbs [aria-current="page"] { color: var(--fg); font-weight: 500; }

/* ヒーロー */
.hero {
  text-align: center;
  padding: 64px 20px 40px;
  background: radial-gradient(ellipse at top, color-mix(in srgb, var(--primary) 8%, transparent), transparent 60%), linear-gradient(180deg, var(--bg-soft), transparent);
  border-radius: 16px;
  margin-bottom: 32px;
}
.hero h1 {
  font-size: clamp(1.9rem, 4.2vw, 2.8rem);
  font-weight: 800; letter-spacing: -0.01em;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 12px;
}
.hero p { color: var(--fg-soft); font-size: 1.08rem; max-width: 720px; margin: 8px auto 0; }
.hero .search-hero { margin: 28px auto 0; max-width: 580px; position: relative; display: flex; gap: 8px; }
.hero .search-hero input {
  flex: 1; padding: 13px 18px;
  border: 1px solid var(--border); border-radius: var(--radius);
  background: var(--bg-elev); color: var(--fg);
  font-size: 16px; box-shadow: var(--shadow-sm);
}
.hero .search-hero input:focus { outline: 2px solid var(--primary); outline-offset: -1px; box-shadow: var(--shadow); }
.hero-stats { display: flex; flex-wrap: wrap; gap: 24px; justify-content: center; margin: 24px auto 0; color: var(--fg-soft); font-size: 0.92rem; }
.hero-stats strong { color: var(--fg); font-weight: 700; }

/* カテゴリ */
.category { margin-top: 40px; }
.category-header {
  display: flex; align-items: baseline; gap: 12px;
  margin-bottom: 14px; border-bottom: 1px solid var(--border); padding-bottom: 8px;
}
.category-header h2 { margin: 0; font-size: 1.25rem; }
.category-header .count { color: var(--fg-soft); font-size: 0.9rem; }

/* チップフィルタ */
.chip-bar { display: flex; flex-wrap: wrap; gap: 8px; margin: 8px 0 12px; }
.chip {
  padding: 5px 12px; border: 1px solid var(--border); border-radius: 999px;
  background: var(--bg-elev); color: var(--fg-soft); font-size: 0.85rem;
  cursor: pointer; transition: all 0.12s ease; user-select: none;
}
.chip:hover { border-color: var(--primary); color: var(--primary); }
.chip.active { background: var(--primary); color: #fff; border-color: var(--primary); }

/* ツールグリッド */
.tool-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 14px; }
.tool-card {
  display: flex; flex-direction: column; gap: 4px;
  padding: 16px;
  border: 1px solid var(--border); border-radius: var(--radius);
  background: var(--bg-elev); color: var(--fg);
  transition: transform 0.12s ease, box-shadow 0.12s ease, border-color 0.12s ease;
  text-decoration: none;
}
.tool-card:hover { transform: translateY(-2px); box-shadow: var(--shadow); border-color: var(--primary); text-decoration: none; }
.tool-card .name { font-weight: 600; color: var(--fg); }
.tool-card .desc { font-size: 0.85rem; color: var(--fg-soft); line-height: 1.5; }
.tool-card .badge {
  font-size: 0.7rem; color: var(--fg-soft);
  border: 1px solid var(--border);
  padding: 2px 8px; border-radius: 999px;
  align-self: flex-start; margin-top: 6px;
}
.tool-card .badge.server { color: var(--accent); border-color: var(--accent); }
.tool-card .badge.client { color: var(--primary); border-color: var(--primary); }

/* フォーム/コントロール */
.field { margin-bottom: 14px; }
.field label { display: block; font-weight: 500; margin-bottom: 4px; color: var(--fg); font-size: 0.92rem; }
.field .hint { color: var(--fg-soft); font-size: 0.83rem; margin-top: 4px; }
input[type="text"], input[type="url"], input[type="number"], input[type="email"], input[type="password"], input[type="search"], input[type="date"], select, textarea {
  width: 100%; padding: 10px 12px;
  border: 1px solid var(--border); border-radius: 8px;
  background: var(--bg); color: var(--fg);
  font-size: 15px; font-family: inherit;
  transition: border-color 0.12s, box-shadow 0.12s;
}
textarea { font-family: var(--mono); min-height: 160px; resize: vertical; line-height: 1.5; }
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px color-mix(in srgb, var(--primary) 25%, transparent); }
input[type="checkbox"] { width: auto; margin-right: 4px; vertical-align: middle; }

.btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 9px 16px;
  border: 1px solid var(--primary); background: var(--primary); color: #fff;
  border-radius: 8px; font-weight: 600; cursor: pointer;
  font-size: 14px; font-family: inherit;
  transition: background 0.12s, transform 0.06s;
  text-decoration: none;
}
.btn:hover { background: var(--primary-hover); border-color: var(--primary-hover); text-decoration: none; }
.btn:active { transform: translateY(1px); }
.btn.secondary { background: var(--bg-elev); color: var(--fg); border-color: var(--border); }
.btn.secondary:hover { background: var(--bg-soft); border-color: var(--fg-soft); color: var(--fg); }
.btn.ghost { background: transparent; color: var(--primary); border-color: transparent; }
.btn.ghost:hover { background: var(--bg-soft); }
.btn.small { padding: 5px 10px; font-size: 12.5px; }
.btn.large { padding: 12px 24px; font-size: 16px; }

/* レイアウト：入力とボタンを並べる */
.row { display: flex; gap: 12px; flex-wrap: wrap; align-items: flex-end; }
.row .field { flex: 1 1 200px; margin-bottom: 0; }
.row .field.shrink { flex: 0 0 auto; }
.actions { display: flex; flex-wrap: wrap; gap: 8px; margin: 4px 0 12px; align-items: center; }
.actions .spacer { flex: 1; }

/* 結果ペイン */
.result {
  margin-top: 24px; padding: 18px 20px;
  border: 1px solid var(--border); border-radius: var(--radius);
  background: var(--bg-elev); box-shadow: var(--shadow-sm);
}
.result h3 { margin-top: 0; font-size: 1.05rem; }
.result h4 { margin: 16px 0 6px; font-size: 0.95rem; }
.result pre { background: var(--bg-soft); }
.result.error { border-color: var(--danger); background: color-mix(in srgb, var(--danger) 4%, var(--bg-elev)); }
.result.error h3 { color: var(--danger); }
.result-toolbar { display: flex; gap: 8px; align-items: center; justify-content: flex-end; margin-top: -4px; margin-bottom: 8px; }

.kv { display: grid; grid-template-columns: max-content 1fr; gap: 8px 18px; margin: 10px 0; }
.kv dt { color: var(--fg-soft); font-weight: 500; }
.kv dd { margin: 0; word-break: break-word; }

.tabs { display: flex; gap: 2px; margin-bottom: 12px; border-bottom: 1px solid var(--border); }
.tabs button {
  padding: 8px 14px; background: transparent; border: none;
  color: var(--fg-soft); font-weight: 500; cursor: pointer;
  border-bottom: 2px solid transparent; font-family: inherit; font-size: 14px;
}
.tabs button.active { color: var(--primary); border-bottom-color: var(--primary); }

.alert { padding: 4px 10px; border-radius: 999px; border: 1px solid; font-size: 0.82rem; display: inline-block; line-height: 1.5; }
.alert.info { background: color-mix(in srgb, var(--primary) 10%, transparent); border-color: var(--primary); color: var(--primary); }
.alert.warn { background: color-mix(in srgb, var(--warning) 12%, transparent); border-color: var(--warning); color: var(--warning); }
.alert.error { background: color-mix(in srgb, var(--danger) 10%, transparent); border-color: var(--danger); color: var(--danger); }
.alert.ok { background: color-mix(in srgb, var(--accent) 12%, transparent); border-color: var(--accent); color: var(--accent); }
.alert-block { display: block; padding: 12px 16px; border-radius: 8px; border: 1px solid; margin: 12px 0; font-size: 0.92rem; }

.spinner {
  display: inline-block; width: 14px; height: 14px;
  border: 2px solid var(--border); border-top-color: var(--primary);
  border-radius: 50%; animation: spin 0.7s linear infinite;
  vertical-align: middle; margin-right: 6px;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* スコアバッジ(SEO 等) */
.score-ring {
  display: inline-flex; align-items: center; justify-content: center;
  width: 64px; height: 64px; border-radius: 50%;
  font-weight: 700; font-size: 1.4rem; color: #fff;
}
.score-ring.high { background: var(--accent); }
.score-ring.mid { background: var(--warning); }
.score-ring.low { background: var(--danger); }

/* 記事 */
.article { max-width: 760px; margin: 0 auto; }
.article h2 { margin-top: 40px; padding-top: 8px; }
.article h3 { margin-top: 28px; }
.article p { margin: 1em 0; }
.article ul, .article ol { padding-left: 1.5em; }
.article li { margin: 4px 0; }
.article blockquote {
  border-left: 4px solid var(--primary);
  padding: 8px 16px; margin: 16px 0;
  color: var(--fg-soft); background: var(--bg-soft);
  border-radius: 0 8px 8px 0;
}
.article-meta { color: var(--fg-soft); font-size: 0.9rem; margin-bottom: 24px; }
.article hr { border: none; border-top: 1px solid var(--border); margin: 32px 0; }
.toc {
  background: var(--bg-soft); border: 1px solid var(--border-soft);
  border-radius: 8px; padding: 16px 20px; margin: 16px 0 24px;
}
.toc h4 { margin: 0 0 8px; font-size: 0.9rem; color: var(--fg-soft); text-transform: uppercase; letter-spacing: 0.05em; }
.toc ol { margin: 0; padding-left: 20px; }
.toc a { color: var(--fg); }

/* FAQ (詳細開閉) */
.faq details {
  border: 1px solid var(--border); border-radius: 8px;
  padding: 12px 16px; margin: 8px 0;
  background: var(--bg-elev);
}
.faq summary { cursor: pointer; font-weight: 600; color: var(--fg); }
.faq summary::marker, .faq summary::-webkit-details-marker { color: var(--primary); }
.faq details[open] { box-shadow: var(--shadow-sm); }

/* 関連ツール */
.related { margin-top: 48px; padding-top: 24px; border-top: 1px solid var(--border); }

/* フッタ */
.site-footer {
  border-top: 1px solid var(--border);
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--bg-elev) 68%, var(--bg-soft)), color-mix(in srgb, var(--bg-soft) 94%, var(--bg))),
    var(--bg-soft);
  padding: 42px 20px 28px;
  margin-top: 64px;
  color: var(--fg-soft); font-size: 0.9rem;
}
.site-footer .container {
  max-width: var(--max-w); margin: 0 auto;
  display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 28px;
}
.footer-brand-block p { margin: 10px 0 0; }
.brand-footer { align-items: flex-start; }
.brand-footer .brand-name { font-size: 1rem; }
.brand-footer .brand-sub { font-size: 0.64rem; }
.site-footer h4 { color: var(--fg); margin: 0 0 10px; font-size: 0.9rem; text-transform: uppercase; letter-spacing: 0.04em; }
.site-footer ul { list-style: none; padding: 0; margin: 0; }
.site-footer li { margin-bottom: 4px; }
.site-footer a { color: var(--fg-soft); }
.site-footer a:hover { color: var(--primary); }
.site-footer .copyright { grid-column: 1 / -1; padding-top: 18px; border-top: 1px solid var(--border); font-size: 0.85rem; }

/* トースト */
.toast-host {
  position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%);
  display: flex; flex-direction: column; gap: 8px; z-index: 9999;
  pointer-events: none;
}
.toast {
  padding: 10px 18px; border-radius: 999px;
  background: var(--fg); color: var(--bg);
  font-size: 0.9rem; font-weight: 500;
  box-shadow: var(--shadow-lg);
  opacity: 0; transform: translateY(8px);
  transition: opacity 0.2s, transform 0.2s;
  pointer-events: auto;
}
.toast.show { opacity: 1; transform: translateY(0); }
.toast-ok { background: var(--accent); color: #fff; }
.toast-warn { background: var(--warning); color: #fff; }
.toast-error { background: var(--danger); color: #fff; }

@media (max-width: 720px) {
  .nav { display: none; }
  .nav-toggle { display: flex; }
  .nav.open { display: flex; flex-direction: column; position: absolute; top: var(--header-h); left: 0; right: 0; background: var(--bg-elev); border-bottom: 1px solid var(--border); padding: 12px 20px; gap: 12px; box-shadow: var(--shadow); z-index: 150; }
  .brand-sub { display: none; }
  .search-box { padding-right: 10px; }
  .search-box input { width: 140px; }
  .search-box .search-chip { display: none; }
  .search-result { width: calc(100vw - 32px); right: -8px; }
  .site-footer .container { grid-template-columns: 1fr 1fr; }
  main { padding: 16px 14px 48px; }
  .hero { padding: 40px 16px 28px; margin-bottom: 20px; }
  .kv { grid-template-columns: 1fr; gap: 0; }
  .kv dt { margin-top: 8px; }
  .tool-mode-switch { align-items: stretch; }
  .tool-mode-switch .btn { flex: 1 1 160px; }
}

/* ユーティリティ */
.muted { color: var(--fg-soft); }
.mono { font-family: var(--mono); }
.text-center { text-align: center; }
.mt-0 { margin-top: 0; }
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-4 { margin-top: 32px; }
.flex { display: flex; gap: 8px; }
.flex-wrap { flex-wrap: wrap; }
.grow { flex: 1; }
table { width: 100%; border-collapse: collapse; margin: 12px 0; table-layout: fixed; }
th, td { padding: 8px 12px; text-align: left; border-bottom: 1px solid var(--border); vertical-align: top; overflow-wrap: anywhere; word-break: break-word; }
th { background: var(--bg-soft); font-weight: 600; }
hr { border: none; border-top: 1px solid var(--border); margin: 24px 0; }

/* スキップリンク(アクセシビリティ) */
.skip-link {
  position: absolute; top: -100%; left: 16px;
  background: var(--primary); color: #fff; padding: 8px 16px;
  border-radius: 0 0 8px 8px; font-weight: 600; z-index: 999;
  transition: top 0.15s;
}
.skip-link:focus { top: 0; }

/* フォーカスリング強化 */
:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}
button:focus-visible, .btn:focus-visible, a:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

/* モバイルナビトグル */
.nav-toggle {
  display: none;
  align-items: center; justify-content: center;
  width: 36px; height: 36px;
  background: transparent; border: 1px solid var(--border);
  border-radius: 6px; cursor: pointer; color: var(--fg);
  font-size: 1.2rem; line-height: 1;
}
.nav-toggle:hover { background: var(--bg-soft); }

/* 無効ボタン */
.btn:disabled, .btn[disabled] {
  opacity: 0.5; cursor: not-allowed; pointer-events: none;
}