/* ==========================================================================
   Kuruma-Logger — Minimal black theme
   Orbitron for headings/brand, system fonts for body.
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Orbitron:wght@500;600;700&family=Noto+Sans+JP:wght@400;500;600;700&display=swap');

:root {
  /* Kuruma-Logger ブランドトークン。サポートサイト(website/.vitepress/theme/custom.css)の
     --vp-c-* と値を揃えている。どちらかを変更したらもう一方も手動で合わせること。 */
  --bg:            #161b22;
  --surface:       #1f2632;
  --surface-2:     #263041;
  --line:          #3a4558;
  --line-strong:   #4c5970;

  --shadow-card:   0 1px 0 rgba(255, 255, 255, 0.05) inset, 0 12px 32px rgba(0, 0, 0, 0.6);

  --ink:           #edf2f7;
  --muted:         #b6c2cf;
  --muted-2:       #8b98a8;
  --accent:        #ffffff;
  --cyan:          #7ab8ff;
  --success:       #77f4ae;
  --danger:        #ff8f85;

  --radius-lg: 12px;
  --radius-md: 10px;
  --radius-sm: 8px;

  --font-display: "Orbitron", "Avenir Next", "Helvetica Neue", "Noto Sans JP", sans-serif;
  --font-body: "Hiragino Sans", "Yu Gothic", "BIZ UDPGothic", "Noto Sans JP", "Avenir Next", "Helvetica Neue", "Segoe UI", -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: "JetBrains Mono", "SF Mono", "Fira Code", "Menlo", monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; }
a { color: inherit; }
button, input, select { font: inherit; }
button { cursor: pointer; }

.site-shell {
  width: min(1040px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 1.5rem 0 4rem;
}

/* Header */
.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 2rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--line);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  color: inherit;
  text-decoration: none;
}

.brand-mark {
  display: inline-grid;
  place-items: center;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.9rem;
  letter-spacing: 0.05em;
  color: var(--bg);
  background: var(--cyan);
}

.brand-copy { display: flex; flex-direction: column; gap: 0.1rem; }

.brand-copy strong {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: 0.05em;
  color: var(--ink);
}

.brand-copy small {
  color: var(--muted);
  font-size: 0.78rem;
}

/* Navigation */
.top-nav { display: flex; flex-wrap: wrap; gap: 0.4rem; }

.top-nav a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.4rem;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--muted);
  text-decoration: none;
  white-space: nowrap;
  font-size: 0.92rem;
  font-weight: 500;
  transition: color 0.15s ease, background 0.15s ease;
}

.top-nav a:hover {
  color: var(--cyan);
  background: var(--surface);
}

.top-nav a[aria-current="page"] {
  color: var(--cyan);
}

/* ナビの折りたたみ(720px以下、既存のレスポンシブブレークポイントに合わせている)は
   下の `@media (max-width: 720px)` ブロック内にまとめてある。JS不使用、<details>の
   ネイティブ開閉を利用。<nav id="site-nav"> は <details class="nav-toggle"> の子ではなく
   次の兄弟要素にしている(<details> の子にすると、閉じている間は summary 以外を隠す
   UA スタイルシートの対象になり、複雑な上書きが必要になるため)。デスクトップでは
   summary(トグルボタン)自体を隠し、.top-nav は常時表示のまま。 */
.nav-toggle-summary {
  display: none;
}

/* Layout */
main { display: grid; gap: 1rem; }

.surface {
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--surface);
  padding: 1.75rem;
  box-shadow: var(--shadow-card);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(280px, 1fr);
  gap: 1.75rem;
  align-items: start;
  padding: 2.25rem;
}

.hero-copy, .hero-panel {
  display: grid;
  gap: 1rem;
  align-content: start;
}

/* Typography */
.eyebrow, .feature-kicker, .status-label {
  margin: 0;
  font-family: var(--font-display);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cyan);
}

h1, h2, h3, p { margin-top: 0; }

h1 {
  margin-bottom: 0.9rem;
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3.4vw, 2.5rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--ink);
}

h2 {
  margin-bottom: 0.6rem;
  font-family: var(--font-display);
  font-size: clamp(1.2rem, 2.2vw, 1.5rem);
  font-weight: 600;
  line-height: 1.3;
  color: var(--ink);
}

h3 {
  margin-bottom: 0.45rem;
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  color: var(--ink);
}

/* Step title inside a flow-list item */
.flow-list li strong {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.98rem;
  letter-spacing: 0.02em;
  color: var(--ink);
  display: block;
  margin-bottom: 0.25rem;
}

p {
  margin-bottom: 0;
  line-height: 1.7;
  color: var(--muted);
}

.hero-text { color: var(--muted); font-size: 1rem; }

/* Buttons */
.hero-actions, .section-headline {
  display: flex;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 0.7rem;
}

.section-headline > :first-child { min-width: min(100%, 24rem); }

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.7rem;
  padding: 0.65rem 1.3rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line-strong);
  background: transparent;
  color: var(--ink);
  text-decoration: none;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.95rem;
  white-space: nowrap;
  transition: background 0.15s ease, border-color 0.15s ease;
}

.button:hover {
  border-color: var(--ink);
  background: var(--surface-2);
}

.button-primary {
  border-color: var(--cyan);
  background: var(--cyan);
  color: var(--bg);
}

.button-primary:hover {
  background: #b8d9ff;
  border-color: #b8d9ff;
  box-shadow: 0 0 0 3px rgba(122, 184, 255, 0.2);
}

.button-secondary { background: transparent; color: var(--ink); }

.button[aria-disabled="true"], .button:disabled {
  color: var(--muted-2);
  border-color: var(--line);
  background: transparent;
  pointer-events: none;
  opacity: 0.6;
}

/* Status cards */
.status-card {
  padding: 1rem 1.15rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--surface-2);
}

.status-value {
  margin: 0.2rem 0 0.35rem;
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--ink);
}

.status-note, .feature-card p, .flow-list p, .section-grid p, .surface small {
  color: var(--muted);
}

/* Grids */
.status-grid, .support-grid, .download-grid {
  display: grid;
  gap: 0.85rem;
}

.status-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }

.metric-card, .feature-card, .download-card, .support-grid article {
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--surface-2);
  padding: 1.25rem;
  box-shadow: var(--shadow-card);
}

.metric-label {
  margin-bottom: 0.3rem;
  font-size: 0.8rem;
  color: var(--muted);
}

.metric-value {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 600;
  color: var(--ink);
}

.section-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
  gap: 1.5rem;
  align-items: start;
}

/* Flow list */
.flow-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.7rem;
}

.flow-list li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1rem;
  align-items: start;
  padding: 1rem 1.15rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--surface-2);
  box-shadow: var(--shadow-card);
}

.flow-index {
  display: inline-grid;
  place-items: center;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--cyan);
  background: rgba(122, 184, 255, 0.08);
  border: 1px solid rgba(122, 184, 255, 0.35);
}

.triptych {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.85rem;
}

.feature-card { display: grid; gap: 0.6rem; }

.text-link {
  color: var(--cyan);
  font-weight: 500;
  text-decoration: underline;
  text-underline-offset: 0.2em;
  text-decoration-color: rgba(122, 184, 255, 0.4);
  transition: text-decoration-color 0.15s ease;
}

.text-link:hover { text-decoration-color: var(--cyan); }

.split-section { display: grid; gap: 1rem; }
.support-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }

/* Focus */
.button:focus-visible,
.top-nav a:focus-visible,
.text-link:focus-visible,
input:focus-visible,
select:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

/* Footer */
.site-footer {
  margin-top: 2.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--line);
}

.site-footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1rem;
}

.site-footer-links a {
  color: var(--muted);
  font-size: 0.85rem;
  text-decoration: none;
  transition: color 0.15s ease;
}

.site-footer-links a:hover,
.site-footer-links a:focus-visible {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

.site-footer-links a:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

/* Inline support-help note (setup wizard error/help areas) */
.support-help {
  margin-top: 0.6rem;
  font-size: 0.85rem;
  color: var(--muted);
}

.support-help a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

.support-help a:hover { text-decoration-color: var(--cyan); }

/* Responsive */
@media (max-width: 960px) {
  .hero, .section-grid, .triptych, .support-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .site-shell {
    width: min(100% - 1rem, 1040px);
    padding-top: 0.75rem;
  }

  .site-header, .hero-actions, .section-headline {
    align-items: stretch;
    flex-wrap: wrap;
  }

  .nav-toggle {
    margin-left: auto;
  }

  .nav-toggle-summary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.4rem;
    height: 2.4rem;
    border-radius: var(--radius-sm);
    color: var(--ink);
    cursor: pointer;
    list-style: none;
  }

  .nav-toggle-summary::-webkit-details-marker { display: none; }
  .nav-toggle-summary::marker { content: ""; }

  .nav-toggle-summary:hover { background: var(--surface); }

  .top-nav {
    display: none;
    flex-direction: column;
    align-items: stretch;
    width: 100%;
    margin-top: 0.75rem;
  }

  .nav-toggle[open] + .top-nav {
    display: flex;
  }

  .top-nav a {
    justify-content: flex-start;
  }

  .hero-actions .button, .section-headline .button { width: 100%; }

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

  .surface { padding: 1.25rem; }
  .hero { padding: 1.5rem; }

  h1 { font-size: clamp(1.55rem, 7vw, 2rem); }
}