:root{--primary:#b45309;--secondary:#78350f;--accent:#4d7c0f;--bg:#ffffff;--surface:#fef3e2;--surface-alt:#fde68a;--text:#1a0f04;--muted:#6b7280;--border:#fbbf24;--row-alt:#fef3e2;--radius:10px}
*{box-sizing:border-box}html{scroll-behavior:smooth}
body{margin:0;font-family:"Sarabun","IBM Plex Sans Thai","Noto Sans Thai",system-ui,sans-serif;color:var(--text);background:var(--bg);line-height:1.75;font-size:17px}
img,svg{max-width:100%;height:auto}a{color:var(--primary);text-decoration:underline;text-underline-offset:2px}a:hover{color:var(--secondary)}
header.site{position:sticky;top:0;z-index:50;background:linear-gradient(90deg,var(--primary),var(--secondary));color:#fff;box-shadow:0 2px 8px rgba(0,0,0,.15)}
.container{max-width:1080px;margin:0 auto;padding:0 16px}
.nav{display:flex;flex-wrap:wrap;align-items:center;gap:8px 14px;padding:12px 0}
.nav .brand{display:flex;align-items:center;gap:10px;font-weight:700;color:#fff;text-decoration:none;margin-right:auto}
.nav .brand img{width:32px;height:32px;background:#fff;border-radius:6px;padding:2px}
.nav a{color:#fff;text-decoration:none;font-weight:500;padding:6px 10px;border-radius:6px}
.nav a:hover{background:rgba(255,255,255,.15)}
.hero{background:linear-gradient(135deg,var(--surface),var(--surface-alt));padding:36px 0;border-bottom:3px solid var(--border)}
.hero h1{font-size:1.8rem;margin:0 0 12px;color:var(--secondary);line-height:1.35}
.hero .intro{font-size:1.05rem}
.byline{color:var(--muted);font-size:.95rem;margin:8px 0 16px}
main{padding:24px 0 48px}main section{margin:28px 0}
h2{font-size:1.4rem;color:var(--secondary);border-left:5px solid var(--primary);padding:8px 12px;background:var(--surface);border-radius:0 var(--radius) var(--radius) 0;margin:32px 0 14px}
h3{font-size:1.15rem;color:var(--accent);margin-top:22px}
p{margin:10px 0}ul,ol{padding-left:22px}
ul li{list-style:none;position:relative;padding-left:20px;margin:6px 0}
ul li::before{content:"▸";color:var(--primary);position:absolute;left:0;font-weight:700}
ol{counter-reset:step;list-style:none;padding-left:0}
ol li{counter-increment:step;position:relative;padding-left:38px;margin:8px 0}
ol li::before{content:counter(step);position:absolute;left:0;top:2px;width:26px;height:26px;background:var(--primary);color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:.85rem;font-weight:700}
.table-wrap{overflow-x:auto;border:1px solid var(--border);border-radius:var(--radius);margin:14px 0}
table{width:100%;border-collapse:collapse;min-width:520px}
th{background:linear-gradient(90deg,var(--primary),var(--secondary));color:#fff;padding:10px 12px;text-align:left;font-weight:600}
td{padding:10px 12px;border-top:1px solid var(--border)}
tr:nth-child(even) td{background:var(--row-alt)}
.toc{background:var(--surface);border:1px dashed var(--border);border-radius:var(--radius);padding:14px 18px;margin:18px 0}
.toc h3{margin:0 0 8px;color:var(--secondary)}.toc ul{padding-left:20px}.toc ul li::before{content:"•"}
details{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);margin:10px 0;padding:12px 16px}
details summary{cursor:pointer;font-weight:600;color:var(--secondary);list-style:none;position:relative;padding-right:28px}
details summary::after{content:"▼";position:absolute;right:0;top:0;transition:transform .2s;color:var(--primary)}
details[open] summary::after{transform:rotate(180deg)}
details p{margin-top:10px}
.author-box{display:flex;gap:14px;align-items:flex-start;background:linear-gradient(135deg,var(--surface),var(--surface-alt));border:1px solid var(--border);border-radius:var(--radius);padding:16px;margin:28px 0}
.author-box img{width:64px;height:64px;border-radius:50%}
.author-box h4{margin:0 0 4px;color:var(--secondary)}
.author-box p{margin:4px 0;font-size:.95rem}
.figure{margin:18px 0;text-align:center}
.figure svg{border-radius:var(--radius);border:1px solid var(--border);background:var(--surface)}
figcaption{color:var(--muted);font-size:.9rem;margin-top:6px}
footer.site{background:var(--secondary);color:#fff;padding:24px 0;margin-top:40px}
footer.site a{color:#fde68a}
footer .fnav{display:flex;flex-wrap:wrap;gap:8px 18px;margin-top:8px}
.crumbs{font-size:.9rem;color:var(--muted);margin:8px 0}.crumbs a{color:var(--primary)}
@media (min-width:700px){body{font-size:18px}.hero h1{font-size:2.2rem}h2{font-size:1.55rem}}
@media (min-width:980px){.hero h1{font-size:2.4rem}}