*{margin:0;padding:0;box-sizing:border-box}
:root{
  --bg:#f8f6f1;--card:#fffdf8;--text:#2c2418;--muted:#8a7c6a;
  --accent:#8b6914;--border:#e0d8c8;--shadow:rgba(139,105,20,.08);
}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Noto Sans SC",sans-serif;
  background:var(--bg);color:var(--text);line-height:1.8}

/* Hero */
.hero{text-align:center;padding:3rem 1.5rem 2rem;background:linear-gradient(135deg,#f5efe0,#ebe3d0)}
.hero h1{font-size:2rem;color:var(--accent);letter-spacing:.05em;margin-bottom:.3rem}
.subtitle{color:var(--muted);font-size:.95rem}
.search-box{margin:1.5rem auto;max-width:400px}
.search-box input{width:100%;padding:.7rem 1.2rem;border:2px solid var(--border);
  border-radius:2rem;font-size:.95rem;background:var(--card);color:var(--text);
  transition:border-color .2s}
.search-box input:focus{outline:none;border-color:var(--accent)}
.stats{color:var(--muted);font-size:.8rem}

/* Notes grid */
.notes-grid{max-width:900px;margin:2rem auto;padding:0 1rem;
  display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:1rem}
.note-card{display:block;text-decoration:none;color:inherit;
  background:var(--card);border:1px solid var(--border);border-radius:.5rem;
  padding:1.2rem;transition:all .2s;position:relative;overflow:hidden}
.note-card:hover{transform:translateY(-2px);box-shadow:0 6px 20px var(--shadow);
  border-color:var(--accent)}
.card-body{display:flex;flex-direction:column;gap:.5rem}
.card-title{font-size:.95rem;font-weight:600;color:var(--text);
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.card-date{font-size:.75rem;color:var(--muted)}

/* Article page */
.topbar{display:flex;align-items:center;gap:1rem;padding:.8rem 1.5rem;
  background:var(--card);border-bottom:1px solid var(--border);
  position:sticky;top:0;z-index:10}
.back-link{color:var(--accent);text-decoration:none;font-size:.85rem;white-space:nowrap}
.back-link:hover{text-decoration:underline}
.site-name{color:var(--muted);font-size:.85rem}

.article{max-width:720px;margin:0 auto;padding:2rem 1.5rem 4rem}
.article-title{font-size:1.6rem;color:var(--accent);margin-bottom:.5rem;line-height:1.4}
.article-meta{color:var(--muted);font-size:.8rem;margin-bottom:2rem;
  padding-bottom:1rem;border-bottom:1px solid var(--border)}
.article p{margin-bottom:1rem}
.article h2{font-size:1.3rem;color:var(--text);margin:2rem 0 .8rem}
.article h3{font-size:1.1rem;color:var(--text);margin:1.5rem 0 .5rem}
.article img{max-width:100%;border-radius:.5rem;margin:1rem 0;
  box-shadow:0 2px 12px var(--shadow)}
.article video{max-width:100%;border-radius:.5rem;margin:1rem 0}
.article a{color:var(--accent)}
.article ul,.article ol{margin:1rem 0 1rem 1.5rem}
.article li{margin-bottom:.3rem}
.article-blockquote{border-left:3px solid var(--accent);padding-left:1rem;
  margin:1rem 0;color:var(--muted)}
.article-blockcode{background:var(--border);padding:.1rem .3rem;border-radius:.2rem;font-size:.9em}
.article-pre{background:#2c2418;color:#f0e8d8;padding:1rem;border-radius:.5rem;
  overflow-x:auto;margin:1rem 0}
.article-pre code{background:none;padding:0}
.article table{width:100%;border-collapse:collapse;margin:1rem 0}
.article th,.article td{border:1px solid var(--border);padding:.5rem .8rem;text-align:left}
.article th{background:var(--card)}
.tags-bar{display:flex;gap:.4rem;flex-wrap:wrap;margin:1rem 0 1.5rem}
.tag{display:inline-block;padding:.15rem .6rem;background:var(--accent);
  color:#fff;border-radius:2rem;font-size:.75rem;font-weight:500;
  text-decoration:none;transition:opacity .2s}
.tag:hover{opacity:.8}
.tag-filter-bar{margin:1rem auto;display:flex;gap:.5rem;justify-content:center;flex-wrap:wrap}
.tag-filter-btn{display:inline-block;padding:.25rem .8rem;background:var(--card);
  color:var(--text);border:1px solid var(--border);border-radius:2rem;
  font-size:.8rem;text-decoration:none;transition:all .2s}
.tag-filter-btn:hover,.tag-filter-btn.active{background:var(--accent);
  color:#fff;border-color:var(--accent)}
.tag-note-item{display:block;text-decoration:none;color:inherit;
  background:var(--card);border:1px solid var(--border);border-radius:.5rem;
  padding:1rem 1.2rem;margin-bottom:.5rem;transition:all .2s}
.tag-note-item:hover{transform:translateY(-1px);box-shadow:0 4px 12px var(--shadow);
  border-color:var(--accent)}
.tag-note-item .tn-title{font-size:.9rem;font-weight:600;color:var(--text);margin-bottom:.2rem}
.tag-note-item .tn-date{font-size:.75rem;color:var(--muted)}

.footer{text-align:center;padding:2rem;color:var(--muted);font-size:.8rem}

@media(max-width:600px){
  .hero{padding:2rem 1rem 1.5rem}
  .hero h1{font-size:1.5rem}
  .notes-grid{grid-template-columns:1fr}
  .article{padding:1.5rem 1rem 3rem}
}