/* ════════════════════════════════════════════════
   M75 技術文庫 — 沿用主站 HUD 配色與字體
   ════════════════════════════════════════════════ */
:root {
  --hud-amber:   #f5a623;
  --hud-red:     #e8132c;
  --hud-green:   #39ff8e;
  --hud-blue:    #00cfff;
  --dark-void:   #04060a;
  --panel-dark:  #080d14;
  --panel-mid:   #0d1a26;
  --glass:       rgba(0,207,255,0.06);
  --glass-border:rgba(0,207,255,0.2);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: 'Noto Sans TC', sans-serif;
  background: var(--dark-void);
  color: #c8d8e8;
  line-height: 1.85;
  overflow-x: hidden;
}

::selection { background: var(--hud-blue); color: #000; }

/* ─── 背景網格 ─── */
body::before {
  content: '';
  position: fixed; inset: 0; z-index: 0;
  background-image:
    linear-gradient(rgba(0,207,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,207,255,0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
}

/* ─── NAVBAR ─── */
.blog-nav {
  position: sticky; top: 0; z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  gap: 1.5rem;
  padding: 0.85rem clamp(1rem, 4vw, 3rem);
  background: rgba(4,6,10,0.88);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--glass-border);
}

.blog-nav-logo {
  display: flex; align-items: center; gap: 0.7rem;
  text-decoration: none; color: #fff;
  font-family: 'Orbitron', sans-serif; font-weight: 900;
  letter-spacing: 0.08em; font-size: 1.05rem;
}
.blog-nav-logo img { width: 38px; height: 38px; }

.blog-nav ul {
  display: flex; align-items: center; gap: clamp(0.8rem, 2vw, 2rem);
  list-style: none; margin: 0; padding: 0;
  font-family: 'Rajdhani', sans-serif; font-weight: 600;
  font-size: 1rem; letter-spacing: 0.05em;
}
.blog-nav a {
  color: #c8d8e8; text-decoration: none;
  transition: color 0.2s;
}
.blog-nav a:hover { color: var(--hud-blue); }
.blog-nav a.is-current { color: var(--hud-blue); }
.blog-nav-join {
  padding: 0.35rem 1rem;
  border: 1px solid var(--hud-amber);
  color: var(--hud-amber) !important;
  clip-path: polygon(8px 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%, 0 8px);
}
.blog-nav-join:hover { background: var(--hud-amber); color: #000 !important; }

/* ─── 版面容器 ─── */
.blog-main {
  position: relative; z-index: 2;
  max-width: 780px;
  margin: 0 auto;
  padding: clamp(2.5rem, 6vw, 5rem) clamp(1.2rem, 4vw, 2rem) 5rem;
}

/* ─── 文庫列表頁 ─── */
.archive-header { margin-bottom: 3.5rem; }
.archive-kicker {
  display: block;
  font-family: 'Orbitron', sans-serif; font-size: 0.75rem;
  letter-spacing: 0.3em; color: var(--hud-blue);
  margin-bottom: 0.8rem;
}
.archive-header h1 {
  font-family: 'Orbitron', sans-serif; font-weight: 900;
  font-size: clamp(2rem, 6vw, 3rem);
  color: #fff; margin: 0 0 0.6rem;
}
.archive-header p { margin: 0; color: #8ea3b8; }

.archive-list { display: grid; gap: 1.2rem; }

.archive-card {
  display: block;
  padding: 1.6rem 1.8rem;
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-left: 3px solid var(--hud-blue);
  text-decoration: none; color: inherit;
  transition: background 0.25s, transform 0.25s, border-color 0.25s;
}
.archive-card:hover {
  background: rgba(0,207,255,0.11);
  border-left-color: var(--hud-amber);
  transform: translateX(6px);
}
.archive-card h2 {
  font-family: 'Rajdhani', sans-serif; font-weight: 700;
  font-size: 1.5rem; color: #fff;
  margin: 0.5rem 0 0.6rem; line-height: 1.35;
}
.archive-card p { margin: 0 0 1rem; color: #8ea3b8; font-size: 0.95rem; }
.archive-card-cta {
  font-family: 'Rajdhani', sans-serif; font-weight: 600;
  font-size: 0.9rem; letter-spacing: 0.08em; color: var(--hud-blue);
}
.archive-empty { color: #8ea3b8; text-align: center; padding: 3rem 0; }

.archive-card-meta, .post-meta {
  display: flex; align-items: center; gap: 0.9rem;
  font-family: 'Rajdhani', sans-serif; font-weight: 600;
  font-size: 0.85rem; letter-spacing: 0.1em; color: #5c7a94;
}
.post-cat {
  padding: 0.15rem 0.6rem;
  border: 1px solid var(--hud-amber);
  color: var(--hud-amber);
  font-size: 0.75rem; letter-spacing: 0.12em;
}

/* ─── 文章頁 ─── */
.post-header { margin-bottom: 3rem; }
.post-back {
  display: inline-block; margin-bottom: 1.8rem;
  font-family: 'Rajdhani', sans-serif; font-weight: 600;
  letter-spacing: 0.08em; color: var(--hud-blue); text-decoration: none;
}
.post-back:hover { color: var(--hud-amber); }

.post-header h1 {
  font-family: 'Orbitron', sans-serif; font-weight: 900;
  font-size: clamp(1.7rem, 5vw, 2.6rem);
  line-height: 1.3; color: #fff;
  margin: 0.8rem 0 1rem;
}
.post-lede {
  font-size: 1.08rem; color: #8ea3b8;
  padding-left: 1.1rem; border-left: 2px solid var(--glass-border);
  margin: 0;
}

.post-body { font-size: 1.05rem; }

.post-body h2 {
  font-family: 'Orbitron', sans-serif; font-weight: 700;
  font-size: 1.45rem; color: var(--hud-blue);
  margin: 3rem 0 1rem; padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--glass-border);
}
.post-body h3 {
  font-family: 'Rajdhani', sans-serif; font-weight: 700;
  font-size: 1.25rem; color: #fff; margin: 2.2rem 0 0.8rem;
}
.post-body p { margin: 0 0 1.4rem; }
.post-body strong { color: #fff; }
.post-body a { color: var(--hud-blue); text-decoration: underline; text-underline-offset: 3px; }
.post-body a:hover { color: var(--hud-amber); }

.post-body ul, .post-body ol { margin: 0 0 1.5rem; padding-left: 1.4rem; }
.post-body li { margin-bottom: 0.6rem; }
.post-body li::marker { color: var(--hud-blue); }

.post-body blockquote {
  margin: 2rem 0; padding: 1.2rem 1.6rem;
  background: var(--glass);
  border-left: 3px solid var(--hud-amber);
  color: #d8e6f2; font-style: italic;
}
.post-body blockquote p:last-child { margin-bottom: 0; }

.post-body img {
  max-width: 100%; height: auto;
  display: block; margin: 2rem auto;
  border: 1px solid var(--glass-border);
}

.post-body code {
  font-family: ui-monospace, 'Cascadia Code', Consolas, monospace;
  font-size: 0.9em; padding: 0.15em 0.45em;
  background: var(--panel-mid); color: var(--hud-green);
  border: 1px solid var(--glass-border);
}
.post-body pre {
  margin: 2rem 0; padding: 1.2rem 1.4rem;
  background: var(--panel-dark);
  border: 1px solid var(--glass-border);
  border-left: 3px solid var(--hud-green);
  overflow-x: auto;
}
.post-body pre code { padding: 0; background: none; border: none; }

/* 表格：窄螢幕可獨立橫向捲動 */
.post-body table {
  width: 100%; margin: 2rem 0;
  border-collapse: collapse; font-size: 0.95rem;
}
.post-body thead { background: var(--panel-mid); }
.post-body th, .post-body td {
  padding: 0.7rem 1rem; text-align: left;
  border: 1px solid var(--glass-border);
}
.post-body th {
  font-family: 'Rajdhani', sans-serif; font-weight: 700;
  letter-spacing: 0.05em; color: var(--hud-blue);
}

.post-body hr {
  margin: 3rem 0; border: none;
  border-top: 1px solid var(--glass-border);
}

.post-footer {
  margin-top: 4rem; padding-top: 2rem;
  border-top: 1px solid var(--glass-border);
}

/* ─── FOOTER ─── */
.blog-footer {
  position: relative; z-index: 2;
  padding: 2.5rem 1.5rem;
  text-align: center;
  border-top: 1px solid var(--glass-border);
  font-family: 'Rajdhani', sans-serif;
  font-size: 0.9rem; color: #5c7a94;
}
.blog-footer p { margin: 0.3rem 0; }
.blog-footer span { color: var(--hud-blue); }

/* ─── 窄螢幕 ─── */
@media (max-width: 640px) {
  .blog-nav { flex-wrap: wrap; gap: 0.8rem; }
  .blog-nav ul { font-size: 0.9rem; width: 100%; justify-content: space-between; }
  .blog-nav-logo span { display: none; }
  .post-body table { display: block; overflow-x: auto; white-space: nowrap; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
  html { scroll-behavior: auto; }
}