:root {
  --bg: #0f1115;
  --bg-elev: #171a21;
  --bg-card: #1d2129;
  --fg: #e6e8eb;
  --fg-muted: #9aa3ad;
  --accent: #4cc2ff;
  --accent-hover: #7fd4ff;
  --border: #2a2f3a;
  --tag-bg: #2a3340;
  --tag-fg: #9fc6e8;
  --good-bg: rgba(63, 185, 80, 0.18);
  --good-fg: #7ee787;
  --good-border: rgba(63, 185, 80, 0.4);
  --soon-bg: rgba(245, 180, 50, 0.22);
  --soon-fg: #ffd966;
  --soon-border: #d49a1c;
  --radius: 8px;
  --max-width: 1080px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Sans",
    "Yu Gothic UI", Meiryo, sans-serif;
  --font-mono: "Cascadia Code", Consolas, Menlo, monospace;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #fafbfc;
    --bg-elev: #ffffff;
    --bg-card: #ffffff;
    --fg: #1a1d22;
    --fg-muted: #5c6370;
    --accent: #0a66c2;
    --accent-hover: #0850a0;
    --border: #e1e4e8;
    --tag-bg: #eaf3fb;
    --tag-fg: #0a66c2;
    --good-bg: rgba(31, 136, 61, 0.10);
    --good-fg: #1a7f37;
    --good-border: rgba(31, 136, 61, 0.35);
    --soon-bg: #fff4d6;
    --soon-fg: #6b4d00;
    --soon-border: #c89512;
  }
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
}

a {
  color: var(--accent);
  text-decoration: none;
}
a:hover { color: var(--accent-hover); text-decoration: underline; }

code {
  font-family: var(--font-mono);
  font-size: 0.92em;
  background: var(--bg-elev);
  padding: 0.1em 0.35em;
  border-radius: 4px;
  border: 1px solid var(--border);
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* ---- Header ---- */
.site-header {
  background: var(--bg-elev);
  border-bottom: 1px solid var(--border);
  padding: 2rem 0 1.25rem;
}
.site-header h1 {
  margin: 0;
  font-size: 1.8rem;
  letter-spacing: 0.02em;
}
.site-header .tagline {
  margin: 0.25rem 0 1rem;
  color: var(--fg-muted);
}
.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1.2rem;
  font-size: 0.95rem;
}
.site-nav a {
  color: var(--fg-muted);
}
.site-nav a:hover {
  color: var(--accent);
  text-decoration: none;
}

/* ---- Sections ---- */
.intro {
  margin: 2rem 0 1rem;
  color: var(--fg);
}

.card-section {
  margin: 3rem 0;
}
.card-section h2 {
  font-size: 1.4rem;
  border-left: 4px solid var(--accent);
  padding-left: 0.6rem;
  margin: 0 0 0.4rem;
}
.section-lead {
  color: var(--fg-muted);
  margin: 0 0 1.25rem;
}
.subcat {
  font-size: 1.05rem;
  margin: 1.8rem 0 0.6rem;
  color: var(--fg);
  border-bottom: 1px dashed var(--border);
  padding-bottom: 0.3rem;
}

/* ---- Cards (own / binaries) ---- */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1rem;
}
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.1rem 1.2rem;
  display: flex;
  flex-direction: column;
}
.card h3 {
  margin: 0 0 0.4rem;
  font-size: 1.05rem;
}
.card-title-link {
  color: var(--accent);
  text-decoration: none;
}
.card-title-link:hover {
  color: var(--accent-hover);
  text-decoration: underline;
}
.card-desc {
  color: var(--fg);
  margin: 0 0 0.8rem;
  font-size: 0.95rem;
}
.card .meta {
  list-style: none;
  padding: 0;
  margin: 0 0 1rem;
  font-size: 0.85rem;
  color: var(--fg-muted);
}
.card .meta li { margin: 0.15rem 0; }
.meta-key {
  display: inline-block;
  min-width: 6.5em;
  color: var(--fg-muted);
}
.card-actions {
  margin-top: auto;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.btn {
  display: inline-block;
  font-size: 0.85rem;
  padding: 0.35rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--fg);
  background: transparent;
  transition: background 0.15s, border-color 0.15s;
}
.btn:hover {
  background: var(--bg-elev);
  border-color: var(--accent);
  color: var(--accent);
  text-decoration: none;
}
.btn-primary {
  background: #1f7ae0;
  border-color: #1f7ae0;
  color: #ffffff;
  font-weight: 600;
}
.btn-primary:hover {
  background: #3a8dec;
  border-color: #3a8dec;
  color: #ffffff;
  text-decoration: none;
}

/* ---- Link list (external tools) ---- */
.link-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 0.6rem;
}
.link-item {
  display: block;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.7rem 0.9rem;
  color: var(--fg);
}
.link-item:hover {
  border-color: var(--accent);
  background: var(--bg-elev);
  text-decoration: none;
}
.link-title {
  display: block;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 0.2rem;
}
.link-desc {
  display: block;
  font-size: 0.88rem;
  color: var(--fg-muted);
}
.tag {
  display: inline-block;
  font-size: 0.72rem;
  background: var(--tag-bg);
  color: var(--tag-fg);
  padding: 0.05em 0.5em;
  border-radius: 999px;
  margin-left: 0.4em;
  vertical-align: middle;
}

.card-badges {
  margin: 0 0 0.6rem;
  line-height: 1;
}
.badge-good,
.badge-soon {
  display: inline-block;
  padding: 0.15em 0.6em;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 600;
  white-space: nowrap;
  line-height: 1.4;
}
.badge-good {
  background: var(--good-bg);
  color: var(--good-fg);
  border: 1px solid var(--good-border);
}
.badge-soon {
  background: var(--soon-bg);
  color: var(--soon-fg);
  border: 1px solid var(--soon-border);
}

/* ---- Footer ---- */
.site-footer {
  margin-top: 4rem;
  padding: 1.5rem 0;
  border-top: 1px solid var(--border);
  color: var(--fg-muted);
  font-size: 0.9rem;
  text-align: center;
}