:root{
  /* Dark Neon Tech (refined) — single accent */
  --bg:#0A0B0D;        /* near-black */
  --bg2:#141619;       /* solid reading panel / inset */
  --card:#101214;
  --line:#23262C;      /* hairline */
  --line2:#2E323A;
  --txt:#E6E6E6;
  --read:#CDD0D4;      /* article body */
  --muted:#8B949E;
  --neon:#00E5FF;      /* the ONE accent */
  --cyan:#00E5FF;
  --purple:#00E5FF;    /* alias */
  --violet:#00E5FF;
  --gold:#FBBF24;
  --accent:#00E5FF;
  --mono:'IBM Plex Mono','SFMono-Regular',Menlo,monospace;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:'IBM Plex Sans Thai','Noto Sans Thai','Segoe UI',Tahoma,sans-serif;
  background:var(--bg);color:var(--txt);line-height:1.75;font-size:18px;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{max-width:1080px;margin:0 auto;padding:0 20px}
.grad-text,.hl{color:var(--neon)}

/* nav */
.nav{position:sticky;top:0;z-index:50;background:rgba(10,11,13,.82);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav .container{display:flex;align-items:center;gap:22px;height:62px}
.logo{font-weight:700;font-size:22px;letter-spacing:.5px;color:#fff;font-family:var(--mono)}
.logo .dot{color:var(--neon)}
.nav-links{display:flex;gap:18px;margin-left:auto;flex-wrap:wrap}
.nav-links a{color:var(--muted);font-size:15px;transition:.15s}
.nav-links a:hover,.nav-links a.active{color:var(--neon)}

/* hero — dark + subtle neon glow */
.hero{padding:78px 0 60px;text-align:center;position:relative;overflow:hidden}
.hero::before{content:'';position:absolute;top:-160px;left:50%;transform:translateX(-50%);width:680px;height:420px;background:radial-gradient(ellipse,rgba(0,229,255,.12),transparent 70%);pointer-events:none}
.hero .container{position:relative;z-index:1}
.hero .eyebrow{color:var(--neon);font-weight:500;letter-spacing:2.5px;font-size:12px;text-transform:uppercase;font-family:var(--mono)}
.hero h1{font-size:48px;font-weight:700;margin:16px 0;line-height:1.22;color:#fff}
.hero h1 .hl{color:var(--neon);text-shadow:0 0 26px rgba(0,229,255,.5)}
.hero h1 .hl-en{color:var(--neon);font-size:.62em;font-weight:600;letter-spacing:.5px;opacity:.92}
.hero p.sub{color:var(--muted);font-size:19px;max-width:640px;margin:0 auto 28px}

/* hero scan laser line */
.hero::after{content:'';position:absolute;left:0;right:0;top:0;height:2px;background:linear-gradient(90deg,transparent,var(--neon),transparent);opacity:.5;filter:blur(.5px);pointer-events:none;animation:scan 6s linear infinite}
@keyframes scan{0%{top:0;opacity:0}8%{opacity:.6}92%{opacity:.6}100%{top:100%;opacity:0}}

/* full-page typing-code background (homepage) */
.code-rain{position:fixed;inset:0;width:100%;height:100%;z-index:-1;opacity:.16;pointer-events:none}
@media(prefers-reduced-motion:reduce){.hero::after{animation:none}}

/* email capture */
.capture{display:flex;gap:10px;max-width:480px;margin:0 auto;flex-wrap:wrap;justify-content:center}
.capture input{flex:1;min-width:220px;padding:14px 18px;border-radius:10px;border:1px solid var(--line2);background:#0E1013;color:var(--txt);font-size:15px;font-family:inherit}
.capture input::placeholder{color:var(--muted)}
.capture input:focus{outline:none;border-color:var(--neon);box-shadow:0 0 0 3px rgba(0,229,255,.15)}
.btn{padding:14px 26px;border-radius:10px;border:none;background:var(--neon);color:#06181C;font-weight:700;font-size:15px;cursor:pointer;font-family:inherit;transition:.15s}
.btn:hover{box-shadow:0 0 22px rgba(0,229,255,.45);transform:translateY(-1px)}
.btn-ghost{background:transparent;border:1px solid var(--line2);color:var(--txt)}
.btn-ghost:hover{box-shadow:none;border-color:var(--neon);color:var(--neon)}
.capture-note{color:var(--muted);font-size:13px;margin-top:12px}

/* sections */
.section{padding:48px 0}
.section h2{font-size:28px;font-weight:700;margin-bottom:6px;color:#fff}
.section .lead{color:var(--muted);margin-bottom:26px}

/* article grid — dark cards, hairline + neon-on-hover */
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.grid.feat{grid-template-columns:repeat(3,1fr)}
.card{background:var(--card);border:1px solid var(--line);border-radius:12px;overflow:hidden;transition:.18s;display:flex;flex-direction:column}
.card:hover{border-color:var(--neon);box-shadow:0 0 0 1px rgba(0,229,255,.35),0 12px 30px rgba(0,0,0,.45);transform:translateY(-3px)}
.card .thumb{height:150px;display:flex;align-items:center;justify-content:center;font-size:42px}
.card .body{padding:18px;display:flex;flex-direction:column;gap:10px;flex:1}
.tag{align-self:flex-start;font-size:11px;font-weight:500;padding:4px 10px;border-radius:6px;background:rgba(0,229,255,.1);color:var(--neon);font-family:var(--mono);letter-spacing:.5px}
.card h3{font-size:18px;line-height:1.45;font-weight:700;color:#fff}
.card .excerpt{color:var(--muted);font-size:14px;flex:1}
.card .meta{color:var(--muted);font-size:12px;display:flex;gap:12px;align-items:center;flex-wrap:wrap;font-family:var(--mono)}

/* category gradients for thumbs */
.thumb.news{background:linear-gradient(135deg,#0ea5e9,#1e3a8a)}
.thumb.opb{background:linear-gradient(135deg,#f43f5e,#7c3aed)}
.thumb.guides{background:linear-gradient(135deg,#f59e0b,#b45309)}
.thumb.tools{background:linear-gradient(135deg,#10b981,#065f46)}
.thumb.cases{background:linear-gradient(135deg,#a78bfa,#6d28d9)}

/* article page — solid reading panel */
.article{max-width:720px;margin:36px auto;padding:40px 38px;background:var(--bg2);border:1px solid var(--line);border-radius:14px}
.article .tag{margin-bottom:14px;display:inline-block}
.article h1{font-size:36px;line-height:1.3;margin-bottom:14px;font-weight:700;color:#fff}
.article .meta{color:var(--muted);font-size:13px;margin-bottom:28px;border-bottom:1px solid var(--line);padding-bottom:20px;font-family:var(--mono)}
.article .content{font-size:19px;line-height:1.85;color:var(--read)}
.article .content h2{font-size:25px;margin:34px 0 12px;font-weight:700;color:#fff}
.article .content h3{font-size:20px;margin:24px 0 10px;font-weight:700;color:#fff}
.article .content p{margin:16px 0}
.article .content ul,.article .content ol{margin:16px 0 16px 24px}
.article .content li{margin:7px 0}
.article .content blockquote{border-left:2px solid var(--neon);padding:8px 18px;margin:20px 0;background:rgba(0,229,255,.05);color:var(--muted);border-radius:0 8px 8px 0}
.article .content strong{color:#fff}
.article .content a{color:var(--neon);text-decoration:underline;text-underline-offset:2px}
.article .content h2[id]{scroll-margin-top:80px}

/* table of contents */
.toc{background:rgba(255,255,255,.025);border:1px solid var(--line);border-left:2px solid var(--neon);border-radius:0 10px 10px 0;padding:18px 22px;margin:0 0 30px}
.toc-title{font-weight:500;margin-bottom:10px;font-size:12px;text-transform:uppercase;letter-spacing:1.5px;color:var(--neon);font-family:var(--mono)}
.toc ol{margin:0;padding-left:20px}
.toc li{margin:7px 0;color:var(--muted)}
.toc a{color:var(--read)}
.toc a:hover{color:var(--neon)}

/* share buttons */
.share{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin:36px 0 0;border-top:1px solid var(--line);padding-top:24px}
.share-label{color:var(--muted);font-size:14px}
.share-btn{padding:8px 16px;border-radius:8px;font-size:13px;font-weight:500;border:1px solid var(--line2);background:transparent;color:var(--txt);cursor:pointer;font-family:var(--mono);transition:.15s;text-decoration:none}
.share-btn:hover{border-color:var(--neon);color:var(--neon)}

/* inline cta */
.cta-box{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:28px;text-align:center;margin:40px auto;max-width:720px}
.cta-box h3{font-size:20px;margin-bottom:6px;color:#fff}
.cta-box p{color:var(--muted);margin-bottom:16px}

/* footer */
footer{border-top:1px solid var(--line);padding:36px 0;margin-top:40px;color:var(--muted);font-size:14px}
footer .container{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap}
footer a{color:var(--muted)}footer a:hover{color:var(--neon)}

/* admin */
.admin-wrap{max-width:1000px;margin:0 auto;padding:30px 20px}
.admin-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:24px;flex-wrap:wrap;gap:12px}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-bottom:26px}
.stat{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:18px}
.stat .n{font-size:28px;font-weight:700;color:#fff;font-family:var(--mono)}
.stat .l{color:var(--muted);font-size:13px}
table{width:100%;border-collapse:collapse;background:var(--card);border:1px solid var(--line);border-radius:12px;overflow:hidden}
th,td{padding:12px 14px;text-align:left;border-bottom:1px solid var(--line);font-size:14px}
th{color:var(--muted);font-weight:600;background:rgba(255,255,255,.03);font-family:var(--mono)}
.pill{font-size:12px;padding:3px 10px;border-radius:6px;font-family:var(--mono)}
.pill.pub{background:rgba(16,185,129,.16);color:#34d399}
.pill.draft{background:rgba(251,191,36,.16);color:var(--gold)}
.pill.fb{background:rgba(0,229,255,.16);color:var(--neon)}
.form-card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:26px;max-width:820px;margin:0 auto}
.field{margin-bottom:18px}
.field label{display:block;font-size:14px;margin-bottom:6px;color:var(--muted)}
.field input[type=text],.field textarea,.field select{width:100%;padding:11px 14px;border-radius:8px;border:1px solid var(--line2);background:#0E1013;color:var(--txt);font-family:inherit;font-size:15px}
.field textarea{resize:vertical}
.field input:focus,.field textarea:focus,.field select:focus{outline:none;border-color:var(--neon)}
.checks{display:flex;gap:24px;align-items:center;flex-wrap:wrap}
.checks label{display:flex;gap:8px;align-items:center;color:var(--txt)}
.row-actions{display:flex;gap:8px;flex-wrap:wrap}
.btn-sm{padding:7px 14px;font-size:13px;border-radius:7px}
.hint{background:rgba(255,255,255,.03);border:1px dashed var(--line2);border-radius:8px;padding:12px 14px;color:var(--muted);font-size:13px;margin-top:6px}
.login-box{max-width:380px;margin:80px auto;background:var(--card);border:1px solid var(--line);border-radius:14px;padding:34px}
.login-box h1{font-size:24px;margin-bottom:20px;text-align:center;color:#fff}
.err{background:rgba(239,68,68,.14);color:#f87171;padding:10px 14px;border-radius:8px;margin-bottom:16px;font-size:14px}

@media(max-width:820px){
  .grid,.grid.feat{grid-template-columns:1fr}
  .stats{grid-template-columns:repeat(2,1fr)}
  .hero h1{font-size:34px}
  .article{padding:30px 22px}
  .nav-links{gap:14px}
}