:root{--bg:#0c0f12;--bg-2:#11151a;--panel:#151a20;--line:#222b33;--line-2:#2c3742;--steel:#8c98a4;--steel-light:#c7cfd6;--amber:#ff8a1f;--amber-soft:#ffb05c;--cyan:#3fd0d6;--white:#f3f6f8;--muted:#7d8893}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:'Sarabun',sans-serif;background:var(--bg);color:var(--white);line-height:1.85;font-size:17px}
a{color:inherit;text-decoration:none}
.container{max-width:840px;margin:0 auto;padding:0 24px}
nav{position:sticky;top:0;z-index:50;backdrop-filter:blur(12px);background:rgba(12,15,18,.8);border-bottom:1px solid var(--line)}
nav .container{max-width:1240px;display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{display:flex;align-items:center;gap:11px;font-weight:700;letter-spacing:.5px;font-size:18px}
.logo .mark{width:32px;height:32px;border:1.5px solid var(--amber);position:relative;background:linear-gradient(135deg,rgba(255,138,31,.12),transparent)}
.logo .mark::before{content:"";position:absolute;inset:0;margin:auto;width:12px;height:12px;border:1.5px solid var(--amber);border-radius:50%}
.logo span small{display:block;font-size:9px;letter-spacing:3px;color:var(--amber);font-family:'JetBrains Mono',monospace}
.btn{background:var(--amber);color:#0c0f12;padding:10px 20px;font-weight:700;border-radius:2px;font-size:14px;transition:.2s}
.btn:hover{background:var(--amber-soft)}
.crumb{font-family:'JetBrains Mono',monospace;font-size:12px;letter-spacing:1px;color:var(--muted);padding:36px 0 0}
.crumb a:hover{color:var(--amber)}
.art-head{padding:24px 0 30px;border-bottom:1px solid var(--line);margin-bottom:40px}
.art-head .cat{font-family:'JetBrains Mono',monospace;font-size:12px;letter-spacing:3px;color:var(--amber);margin-bottom:18px}
.art-head h1{font-family:'Space Grotesk','Sarabun',sans-serif;font-size:clamp(28px,4.6vw,42px);font-weight:700;line-height:1.3;letter-spacing:-.5px;margin-bottom:18px}
.art-head .meta{font-family:'JetBrains Mono',monospace;font-size:12px;color:var(--muted);letter-spacing:1px}
.prose{padding-bottom:60px}
.prose h2{font-family:'Space Grotesk','Sarabun',sans-serif;font-size:clamp(22px,3vw,30px);font-weight:700;letter-spacing:-.5px;margin:42px 0 16px;line-height:1.25}
.prose h3{font-family:'Space Grotesk','Sarabun',sans-serif;font-size:20px;font-weight:600;margin:28px 0 10px}
.prose p{color:var(--steel-light);margin-bottom:18px}
.prose ul{margin:0 0 18px 4px;list-style:none}
.prose li{color:var(--steel-light);padding:6px 0 6px 24px;position:relative}
.prose li::before{content:"›";position:absolute;left:0;color:var(--amber);font-weight:700}
.prose strong{color:var(--white);font-weight:600}
.callout{border-left:3px solid var(--amber);background:linear-gradient(90deg,rgba(255,138,31,.08),transparent);padding:18px 22px;margin:26px 0;border-radius:0 2px 2px 0}
.callout b{color:var(--amber)}
.formula{font-family:'JetBrains Mono',monospace;background:var(--bg-2);border:1px solid var(--line-2);border-radius:3px;padding:18px 20px;margin:22px 0;color:var(--cyan);font-size:14.5px;line-height:1.8}
table{width:100%;border-collapse:collapse;font-size:14.5px;margin:24px 0;border:1px solid var(--line)}
th{font-family:'JetBrains Mono',monospace;font-size:11px;letter-spacing:1px;color:var(--muted);text-align:left;padding:12px 16px;border-bottom:1px solid var(--line);text-transform:uppercase}
td{padding:12px 16px;border-bottom:1px solid var(--line);color:var(--steel-light)}
tr:last-child td{border-bottom:none}
td:first-child{color:var(--white);font-weight:600}
.win{color:var(--amber);font-weight:700}
.endcta{border:1px solid var(--line-2);background:linear-gradient(160deg,var(--panel),var(--bg));border-radius:6px;padding:36px 32px;margin:20px 0 60px;text-align:center}
.endcta h3{font-family:'Space Grotesk','Sarabun',sans-serif;font-size:24px;font-weight:700;margin-bottom:10px}
.endcta p{color:var(--steel-light);margin-bottom:22px}
.related{border-top:1px solid var(--line);padding:40px 0 70px}
.related .k{font-family:'JetBrains Mono',monospace;font-size:12px;letter-spacing:2px;color:var(--amber);margin-bottom:20px}
.related a{display:block;padding:14px 0;border-bottom:1px solid var(--line);color:var(--steel-light);transition:.2s}
.related a:hover{color:var(--amber);padding-left:8px}
footer{border-top:1px solid var(--line);padding:30px 0;font-family:'JetBrains Mono',monospace;font-size:12px;color:var(--muted);text-align:center}