/* ギャン2ラボ — 二人組(人間×AI)デュオ配色
   ink:#171A21 / paper:#EEF1F6(冷たい紙) / human:#D6482B(朱) / ai:#2B50E0(群青) */
* { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --paper: #EEF1F6;
  --card: #FFFFFF;
  --ink: #171A21;
  --muted: #5A6272;
  --human: #D6482B;
  --ai: #2B50E0;
  --line: #D4DAE4;
}

body {
  font-family: "Zen Kaku Gothic New", "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
  background: var(--paper);
  color: var(--ink);
  line-height: 1.85;
  font-size: 16px;
}

main { max-width: 720px; margin: 0 auto; padding: 0 20px 80px; }

/* header */
.site-head { border-bottom: 2px solid var(--ink); background: var(--card); }
.site-head nav {
  max-width: 720px; margin: 0 auto; padding: 14px 20px;
  display: flex; justify-content: space-between; align-items: baseline;
}
.brand {
  font-family: "DotGothic16", monospace; font-size: 22px;
  color: var(--ink); text-decoration: none; letter-spacing: 2px;
}
.nav-feed { color: var(--muted); text-decoration: none; font-size: 13px; }
.nav-feed:hover, .nav-feed:focus-visible { color: var(--ai); }

/* hero */
.hero { padding: 56px 0 40px; }
.hero-eyebrow {
  font-family: "Noto Sans Mono", monospace; font-size: 13px;
  color: var(--muted); letter-spacing: 3px; margin-bottom: 8px;
}
.hero-logo {
  font-family: "DotGothic16", monospace; font-size: clamp(44px, 9vw, 72px);
  letter-spacing: 4px; line-height: 1.1; margin-bottom: 28px;
}
.logo-lab { color: var(--ai); }

/* 署名要素: 人間×AIの対話ログ */
.dialog { border-left: 3px solid var(--line); padding-left: 20px; margin-bottom: 28px; }
.line { margin: 6px 0; }
.line .who {
  display: inline-block; min-width: 3.2em; margin-right: 10px;
  font-size: 12px; font-weight: 700; letter-spacing: 1px;
  text-align: center; padding: 1px 6px; border-radius: 3px; color: #fff;
}
.line.human .who { background: var(--human); }
.line.ai .who { background: var(--ai); }
.line.ai { font-family: "Noto Sans Mono", "Zen Kaku Gothic New", monospace; font-size: 15px; }

.hero-desc { color: var(--muted); font-size: 15px; margin-bottom: 28px; }

/* 30日プログレス */
.progress {
  position: relative; height: 34px; background: var(--card);
  border: 2px solid var(--ink); border-radius: 4px; overflow: hidden;
}
.progress-bar {
  height: 100%;
  background: repeating-linear-gradient(-45deg, var(--ai), var(--ai) 8px, #4A6AE8 8px, #4A6AE8 16px);
  transition: width .6s ease;
}
.progress-label {
  position: absolute; inset: 0; display: grid; place-items: center;
  font-family: "DotGothic16", monospace; font-size: 15px; letter-spacing: 2px;
  color: var(--ink); mix-blend-mode: multiply;
}

/* 記事一覧 */
.sec-title {
  font-size: 15px; letter-spacing: 3px; color: var(--muted);
  border-bottom: 1px solid var(--line); padding-bottom: 8px; margin: 40px 0 4px;
  font-weight: 500;
}
.cards { list-style: none; }
.card a {
  display: block; background: var(--card); border: 1px solid var(--line);
  border-radius: 6px; padding: 20px 22px; margin-top: 14px;
  color: inherit; text-decoration: none;
  transition: border-color .15s ease, transform .15s ease;
}
.card a:hover, .card a:focus-visible { border-color: var(--ai); transform: translateY(-2px); }
.card h2 { font-size: 18px; margin: 6px 0 4px; }
.card p { color: var(--muted); font-size: 14px; }
.card time { font-family: "Noto Sans Mono", monospace; font-size: 12px; color: var(--muted); }

.day-chip {
  display: inline-block; font-family: "DotGothic16", monospace; font-size: 12px;
  background: var(--ink); color: var(--paper); padding: 2px 8px; border-radius: 3px;
  letter-spacing: 1px;
}

/* 記事ページ */
.post { background: var(--card); border: 1px solid var(--line); border-radius: 6px; padding: 36px 32px; margin-top: 36px; }
.post-head h1 { font-size: 26px; line-height: 1.5; margin: 10px 0 4px; }
.post-head time { font-family: "Noto Sans Mono", monospace; font-size: 13px; color: var(--muted); }
.post-body { margin-top: 24px; }
.post-body h2 {
  font-size: 19px; margin: 34px 0 10px; padding-left: 12px;
  border-left: 4px solid var(--ai);
}
.post-body h3 { font-size: 16px; margin: 24px 0 8px; }
.post-body p { margin: 12px 0; }
.post-body ul, .post-body ol { margin: 12px 0 12px 24px; }
.post-body code {
  font-family: "Noto Sans Mono", monospace; font-size: 14px;
  background: var(--paper); padding: 1px 6px; border-radius: 3px;
}
.post-body pre { background: var(--ink); color: #E8ECF4; padding: 16px; border-radius: 6px; overflow-x: auto; margin: 14px 0; }
.post-body pre code { background: none; color: inherit; padding: 0; }
.post-body blockquote { border-left: 3px solid var(--human); padding-left: 16px; color: var(--muted); margin: 14px 0; }
.post-body a { color: var(--ai); }
.post-body table { border-collapse: collapse; width: 100%; margin: 14px 0; font-size: 14px; }
.post-body th, .post-body td { border: 1px solid var(--line); padding: 8px 10px; text-align: left; }
.post-foot { margin-top: 32px; padding-top: 16px; border-top: 1px solid var(--line); }
.post-foot a { color: var(--ai); text-decoration: none; }
.post-foot a:hover { text-decoration: underline; }

/* footer */
.site-foot {
  max-width: 720px; margin: 0 auto; padding: 24px 20px 40px;
  border-top: 2px solid var(--ink); color: var(--muted); font-size: 13px;
}
.foot-note { margin: 6px 0; }

/* a11y & motion */
:focus-visible { outline: 3px solid var(--ai); outline-offset: 2px; }
@media (prefers-reduced-motion: reduce) {
  .progress-bar, .card a { transition: none; }
}
@media (max-width: 480px) {
  .post { padding: 24px 18px; }
  .hero { padding: 40px 0 32px; }
}