/* ============================================================
   GTM ENGINEER LOG — /scratch/（雑記）
   一覧ページと記事ページで共用。トップより静か、本文優先。
   ============================================================ */

:root {
  --bg:        #070b14;
  --surface:   #0b111d;
  --line:      rgba(126, 165, 195, 0.18);
  --line-hot:  rgba(0, 229, 255, 0.3);

  --cyan:      #35e7ff;
  --gold:      #f0c53a;

  --text:      #e6eff8;
  --text-2:    #b3c6d6;
  --text-3:    #7e96ab;

  --hud:  "Orbitron", sans-serif;
  --mono: "Share Tech Mono", ui-monospace, monospace;
  --body: "Noto Sans JP", "Hiragino Sans", "Yu Gothic", sans-serif;

  --shell: 780px;
  --gutter: clamp(1.25rem, 5vw, 2.5rem);
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--body);
  font-size: 16px;
  line-height: 2;
  letter-spacing: 0.02em;
  font-feature-settings: "palt" 1;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  background-image:
    radial-gradient(ellipse 55% 35% at 50% -8%, rgba(0, 229, 255, 0.06), transparent 65%);
  background-repeat: no-repeat;
}

a { color: var(--cyan); text-decoration: none; }
a:hover { color: #9ff4ff; }

:focus-visible { outline: 2px solid var(--cyan); outline-offset: 3px; }

strong { font-weight: 700; color: #fff; }

h1, h2, h3 { text-wrap: pretty; }

.shell {
  width: min(var(--shell), 100%);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 20;
  padding: 0.6rem 1rem;
  background: var(--cyan);
  color: #04121a;
  font-family: var(--mono);
}
.skip-link:focus { left: 0; }

/* ── topbar ────────────────────────────────────────────── */

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(7, 11, 20, 0.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}

.topbar-inner {
  width: min(var(--shell), 100%);
  margin-inline: auto;
  padding: 0.7rem var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
}

.topbar-id {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  min-height: 32px;
  color: var(--text-2);
  white-space: nowrap;
}
.topbar-id:hover { color: var(--cyan); }
.topbar-id .sep { color: var(--text-3); }

.dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 10px rgba(0, 229, 255, 0.7);
}

.chip {
  padding: 0.2rem 0.6rem;
  color: var(--cyan);
  border: 1px solid var(--line-hot);
  background: rgba(0, 229, 255, 0.06);
}

/* ── page head ─────────────────────────────────────────── */

.page-head {
  padding: clamp(2.5rem, 7vw, 4.5rem) 0 clamp(1.75rem, 4vw, 2.5rem);
}

.eyebrow {
  margin: 0 0 1.25rem;
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.22em;
  line-height: 1.6;
  color: var(--gold);
}
.eyebrow .sep { color: var(--text-3); }

.page-head h1 {
  margin: 0 0 1rem;
  font-family: var(--hud);
  font-weight: 700;
  font-size: clamp(1.6rem, 6vw, 2.4rem);
  letter-spacing: 0.14em;
  line-height: 1.3;
  color: #eafcff;
}

.page-head .jp {
  margin: 0 0 1.5rem;
  font-size: 0.85rem;
  color: var(--text-3);
}

.page-head .lead {
  margin: 0;
  max-width: 34em;
  color: var(--text-2);
  line-height: 2.15;
  text-wrap: pretty;
}

/* ── post list ─────────────────────────────────────────── */

.posts {
  margin: 0;
  padding: 0 0 clamp(3rem, 7vw, 5rem);
  list-style: none;
  border-top: 1px solid var(--line);
}

.posts li { border-bottom: 1px solid var(--line); }

.post-link {
  display: grid;
  gap: 0.35rem;
  padding: 1.5rem 0.25rem;
  color: inherit;
  transition: background 0.2s, padding-left 0.2s;
}

.post-link:hover {
  color: inherit;
  background: rgba(0, 229, 255, 0.04);
  padding-left: 0.9rem;
}

.post-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 0.9rem;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  color: var(--text-3);
}

.post-cat {
  padding: 0.1rem 0.5rem;
  color: var(--cyan);
  border: 1px solid var(--line-hot);
  background: rgba(0, 229, 255, 0.06);
  font-size: 0.66rem;
}

.post-title {
  font-size: 1.05rem;
  font-weight: 500;
  line-height: 1.8;
  color: var(--text);
}

.post-excerpt {
  font-size: 0.86rem;
  line-height: 1.95;
  color: var(--text-3);
}

.list-note {
  margin: 0 0 clamp(3rem, 7vw, 5rem);
  padding-left: 1rem;
  border-left: 1px solid var(--line-hot);
  font-size: 0.85rem;
  line-height: 2;
  color: var(--text-3);
}

/* ── article ───────────────────────────────────────────── */

.article {
  padding: 0 0 clamp(3rem, 7vw, 5rem);
}

.article-head {
  padding: clamp(2.5rem, 7vw, 4rem) 0 clamp(1.5rem, 4vw, 2rem);
  border-bottom: 1px solid var(--line);
}

.article-head h1 {
  margin: 0.75rem 0 0;
  font-size: clamp(1.4rem, 5.2vw, 2rem);
  font-weight: 700;
  line-height: 1.7;
  letter-spacing: 0.03em;
  color: var(--text);
}

.article-body {
  padding-top: clamp(1.75rem, 4vw, 2.5rem);
}

.article-body p {
  margin: 0 0 1.6rem;
  color: var(--text-2);
  line-height: 2.2;
}

.article-body h2 {
  margin: 2.75rem 0 1rem;
  font-size: 1.05rem;
  font-weight: 700;
  line-height: 1.8;
  letter-spacing: 0.04em;
  color: var(--text);
  padding-left: 0.9rem;
  border-left: 2px solid var(--cyan);
}

.article-body ul {
  margin: 0 0 1.6rem;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.5rem;
}

.article-body ul li {
  position: relative;
  padding-left: 1.2rem;
  color: var(--text-2);
  font-size: 0.94rem;
  line-height: 2;
}

.article-body ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 1em;
  width: 7px;
  height: 1px;
  background: var(--cyan);
}

.article-body blockquote {
  margin: 0 0 1.6rem;
  padding: 1rem 1.25rem;
  border-left: 1px solid var(--line-hot);
  background: var(--surface);
  color: var(--text-3);
  font-size: 0.9rem;
  line-height: 2;
}

.article-foot {
  margin-top: clamp(2.5rem, 6vw, 3.5rem);
  padding-top: 1.5rem;
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.5rem;
  justify-content: space-between;
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
}

/* ── footer ────────────────────────────────────────────── */

.site-footer {
  padding: clamp(2.5rem, 6vw, 3.5rem) 0 3rem;
  border-top: 1px solid var(--line);
  background: rgba(4, 7, 13, 0.7);
}

.footer-inner {
  display: grid;
  gap: 1rem;
  text-align: center;
}

.footer-brand {
  margin: 0;
  font-family: var(--hud);
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  color: var(--text-3);
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem 1.75rem;
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
}

.footer-nav a {
  min-height: 40px;
  display: inline-flex;
  align-items: center;
}

.footer-note {
  margin: 0;
  max-width: 44em;
  margin-inline: auto;
  font-size: 0.74rem;
  line-height: 1.9;
  color: var(--text-3);
}

@media (max-width: 640px) {
  body { font-size: 15.5px; }
  .topbar-inner { font-size: 0.66rem; letter-spacing: 0.1em; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
  }
}

/* ── /privacy/ で使う追加要素 ── */

.policy-sub {
  margin: 1.6rem 0 0.4rem;
  font-family: var(--mono, "Share Tech Mono", monospace);
  font-size: 0.82rem;
  letter-spacing: 0.1em;
  color: var(--cyan, #35e7ff);
}

.policy-rev {
  margin-top: 2.5rem;
  padding-top: 1.2rem;
  border-top: 1px solid var(--line, rgba(126, 165, 195, 0.18));
  font-family: var(--mono, "Share Tech Mono", monospace);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  color: var(--text-3, #7e96ab);
}