/* =====================================================================
   blog.css — หน้ารวมบทความ (blog.html) + ส่วนเสริมในหน้าบทความ
   ===================================================================== */
:root{
  --bl-blue:#0e7ae6; --bl-blue-d:#0759b0; --bl-navy:#0b1f33; --bl-sky:#38bdf8;
  --bl-ink:#334155; --bl-muted:#64748b; --bl-line:#e2ebf5; --bl-bg:#f5f8fc; --bl-soft:#eef6ff;
}
.bl-wrap{ background:var(--bl-bg); padding-bottom:70px; }

/* ---------- hero ---------- */
.bl-hero{ position:relative; overflow:hidden; color:#fff; text-align:center; padding:56px 0 110px;
  background:radial-gradient(60% 120% at 85% 0%,rgba(56,189,248,.35),transparent 60%),radial-gradient(50% 100% at 0% 100%,rgba(99,102,241,.3),transparent 60%),linear-gradient(135deg,#071a2e,#0b3768 55%,#0e6fd1); }
.bl-hero::before{ content:""; position:absolute; inset:0; opacity:.45;
  background-image:radial-gradient(rgba(255,255,255,.25) 1px,transparent 1px); background-size:24px 24px;
  -webkit-mask-image:radial-gradient(60% 80% at 50% 30%,#000,transparent); mask-image:radial-gradient(60% 80% at 50% 30%,#000,transparent); }
.bl-hero .container{ position:relative; }
.bl-kicker{ display:inline-flex; align-items:center; gap:8px; padding:6px 14px; border-radius:999px; font-size:12.5px; font-weight:600; letter-spacing:.08em;
  background:rgba(255,255,255,.12); border:1px solid rgba(255,255,255,.2); color:#e0f2fe; }
.bl-kicker--dark{ background:var(--bl-soft); border-color:#d6e8fb; color:var(--bl-blue-d); }
.bl-hero h1{ margin:16px 0 12px; font-size:clamp(30px,4.6vw,52px); line-height:1.2; font-weight:700; }
.bl-hero h1 span{ background:linear-gradient(90deg,#7dd3fc,#bae6fd); -webkit-background-clip:text; background-clip:text; color:transparent; }
.bl-hero > .container > p{ max-width:640px; margin:0 auto; font-size:17px; line-height:1.8; color:#dbeafe; }
.bl-search{ position:relative; display:block; max-width:560px; margin:26px auto 0; }
.bl-search i{ position:absolute; left:20px; top:50%; transform:translateY(-50%); color:var(--bl-muted); }
.bl-search input{ width:100%; padding:16px 20px 16px 50px; border-radius:999px; border:0; font:inherit; font-size:16px; color:var(--bl-navy);
  box-shadow:0 18px 40px rgba(0,0,0,.25); outline:none; }
.bl-search input:focus{ box-shadow:0 0 0 4px rgba(125,211,252,.5),0 18px 40px rgba(0,0,0,.25); }
.bl-hero-stats{ margin-top:20px; display:flex; justify-content:center; gap:22px; flex-wrap:wrap; font-size:14.5px; color:#bfdbfe; }
.bl-hero-stats b{ color:#fff; font-weight:600; }

/* ---------- featured ---------- */
.bl-feature{ position:relative; z-index:2; margin-top:-70px; display:grid; grid-template-columns:minmax(0,1.6fr) minmax(0,1fr); gap:20px; }
.bl-feat-main{ position:relative; display:block; min-height:400px; border-radius:24px; overflow:hidden; color:#fff; text-decoration:none; box-shadow:0 22px 50px rgba(8,48,86,.18); }
.bl-feat-main img{ position:absolute; inset:0; width:100%; height:100%; object-fit:cover; transition:transform .6s ease; }
.bl-feat-main:hover img{ transform:scale(1.04); }
.bl-feat-main::after{ content:""; position:absolute; inset:0; background:linear-gradient(180deg,rgba(7,26,46,0) 25%,rgba(7,26,46,.92)); }
.bl-feat-txt{ position:absolute; left:0; right:0; bottom:0; z-index:1; padding:28px 30px; }
.bl-feat-txt h2{ margin:10px 0 8px; font-size:clamp(22px,2.6vw,30px); line-height:1.3; }
.bl-feat-txt p{ margin:0 0 12px; color:#dbeafe; font-size:15.5px; line-height:1.7; max-width:620px; }
.bl-feat-txt .go{ font-weight:600; color:#7dd3fc; }
.bl-badge{ display:inline-block; margin-right:8px; padding:4px 11px; border-radius:999px; background:#fbbf24; color:#422006; font-size:12.5px; font-weight:700; }
.bl-feat-txt .bl-cat{ position:static; }
.bl-feat-side{ background:#fff; border:1px solid var(--bl-line); border-radius:24px; padding:20px; box-shadow:0 16px 40px rgba(8,48,86,.08); display:flex; flex-direction:column; gap:6px; }
.bl-side-title{ font-weight:600; color:var(--bl-navy); padding:0 6px 8px; display:flex; gap:8px; align-items:center; }
.bl-side-title i{ color:#f97316; }
.bl-mini{ display:grid; grid-template-columns:96px 1fr; gap:14px; align-items:center; padding:8px; border-radius:16px; text-decoration:none; transition:background .2s; }
.bl-mini:hover{ background:var(--bl-soft); }
.bl-mini img{ width:96px; height:72px; object-fit:cover; border-radius:12px; }
.bl-mini h3{ margin:2px 0 4px; font-size:15px; line-height:1.45; color:var(--bl-navy); display:-webkit-box; -webkit-line-clamp:2; -webkit-box-orient:vertical; overflow:hidden; }
.bl-mini-cat{ font-size:12px; font-weight:600; color:var(--bl-blue); }
.bl-mini-meta{ font-size:12.5px; color:var(--bl-muted); }

/* ---------- learning path ---------- */
.bl-learn{ margin-top:46px; background:#fff; border:1px solid var(--bl-line); border-radius:26px; padding:34px; box-shadow:0 10px 30px rgba(8,48,86,.05); }
.bl-learn-head{ display:grid; grid-template-columns:minmax(0,.85fr) minmax(0,1.15fr); gap:34px; align-items:start; }
.bl-learn h2{ margin:12px 0 10px; font-size:clamp(24px,2.6vw,32px); color:var(--bl-navy); line-height:1.3; }
.bl-learn-head > div > p{ margin:0 0 18px; color:var(--bl-muted); font-size:15.5px; line-height:1.8; }
.bl-btn{ display:inline-flex; align-items:center; gap:8px; padding:12px 18px; border-radius:12px; background:var(--bl-blue); color:#fff; font-weight:600; text-decoration:none; transition:background .2s,transform .2s; }
.bl-btn:hover{ background:var(--bl-blue-d); transform:translateY(-2px); }
.bl-learn-list{ list-style:none; margin:0; padding:0; display:flex; flex-direction:column; gap:8px; counter-reset:none; }
.bl-learn-list a{ display:grid; grid-template-columns:42px 1fr auto 14px; gap:12px; align-items:center; padding:12px 14px; border-radius:14px;
  border:1px solid var(--bl-line); background:#fbfdff; text-decoration:none; color:var(--bl-navy); transition:border-color .2s, background .2s, transform .2s; }
.bl-learn-list a:hover{ border-color:#bcd9f7; background:var(--bl-soft); transform:translateX(4px); }
.bl-learn-list .n{ width:42px; height:42px; border-radius:12px; display:grid; place-items:center; font-weight:700; color:#fff; background:linear-gradient(135deg,var(--bl-sky),var(--bl-blue)); }
.bl-learn-list .t{ font-size:15px; font-weight:500; line-height:1.45; }
.bl-learn-list .k{ font-size:12px; color:var(--bl-muted); background:var(--bl-bg); border:1px solid var(--bl-line); padding:3px 9px; border-radius:999px; white-space:nowrap; }
.bl-learn-list i{ color:#9fb3c8; font-size:12px; }

/* ---------- all posts ---------- */
.bl-all{ margin-top:50px; scroll-margin-top:90px; }
.bl-all-head{ margin-bottom:22px; }
.bl-all-head h2{ margin-bottom:14px !important; }
.bl-all-head h2{ margin:0; font-size:clamp(24px,2.6vw,32px); color:var(--bl-navy); }
.bl-chips{ display:flex; gap:8px; flex-wrap:wrap; }
.bl-chips button{ display:inline-flex; align-items:center; gap:7px; padding:9px 14px; border-radius:999px; border:1px solid var(--bl-line); background:#fff;
  font:inherit; font-size:14px; color:var(--bl-ink); cursor:pointer; transition:all .2s; }
.bl-chips button b{ font-size:12px; color:var(--bl-muted); background:var(--bl-bg); padding:1px 7px; border-radius:999px; }
.bl-chips button:hover{ border-color:#bcd9f7; color:var(--bl-blue-d); }
.bl-chips button.on{ background:var(--bl-navy); border-color:var(--bl-navy); color:#fff; }
.bl-chips button.on b{ background:rgba(255,255,255,.18); color:#fff; }
.bl-grid{ display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); gap:20px; }
.bl-card{ display:flex; flex-direction:column; background:#fff; border:1px solid var(--bl-line); border-radius:20px; overflow:hidden; text-decoration:none; color:inherit;
  box-shadow:0 8px 22px rgba(8,48,86,.05); transition:transform .25s, box-shadow .25s; }
.bl-card:hover{ transform:translateY(-6px); box-shadow:0 22px 44px rgba(8,48,86,.13); }
.bl-card[hidden]{ display:none; }
.bl-card-img{ position:relative; aspect-ratio:16/9; overflow:hidden; background:#e8eef6; }
.bl-card-img img{ width:100%; height:100%; object-fit:cover; transition:transform .5s ease; }
.bl-card:hover .bl-card-img img{ transform:scale(1.06); }
.bl-cat{ position:absolute; left:12px; top:12px; display:inline-flex; align-items:center; gap:6px; padding:5px 11px; border-radius:999px;
  background:rgba(255,255,255,.94); color:var(--bl-blue-d); font-size:12.5px; font-weight:600; box-shadow:0 4px 12px rgba(0,0,0,.1); }
.bl-card-body{ padding:18px 20px 18px; display:flex; flex-direction:column; flex:1; }
.bl-card-body h3{ margin:0 0 8px; font-size:17.5px; line-height:1.45; color:var(--bl-navy); }
.bl-card-body p{ margin:0 0 14px; font-size:14.5px; line-height:1.7; color:var(--bl-muted); flex:1; display:-webkit-box; -webkit-line-clamp:3; -webkit-box-orient:vertical; overflow:hidden; }
.bl-card-meta{ display:flex; justify-content:space-between; align-items:center; font-size:13.5px; color:var(--bl-muted); border-top:1px solid var(--bl-line); padding-top:12px; }
.bl-card-meta .go{ color:var(--bl-blue); font-weight:600; }
.bl-card:hover .go i{ transform:translateX(3px); } .bl-card-meta .go i{ transition:transform .2s; }
.bl-empty{ text-align:center; padding:40px 10px; color:var(--bl-muted); font-size:16px; }

.bl-cta{ margin-top:50px; border-radius:24px; padding:34px 36px; color:#fff; display:flex; gap:20px; justify-content:space-between; align-items:center; flex-wrap:wrap;
  background:linear-gradient(135deg,#0b2a4a,#0b4f9c 55%,#0e7ae6); }
.bl-cta h2{ margin:0 0 6px; font-size:24px; } .bl-cta p{ margin:0; color:#dbeafe; }
.bl-cta .btns, .ar-cta .btns{ display:flex; gap:10px; flex-wrap:wrap; }
.bl-cta .btns a{ display:inline-flex; align-items:center; gap:8px; padding:12px 18px; border-radius:12px; font-weight:600; text-decoration:none; color:#fff; }
.bl-cta .b-line{ background:#06c755; } .bl-cta .b-tel{ background:#fff; color:#0759b0; }

/* ---------- เสริมในหน้าบทความ ---------- */
.ar-progress{ position:fixed; left:0; top:0; right:0; height:3px; z-index:1002; pointer-events:none; }
.ar-progress span{ display:block; height:100%; width:0; background:linear-gradient(90deg,var(--bl-sky),var(--bl-blue)); }
a.ar-tag{ color:#fff; text-decoration:none; display:inline-flex; gap:7px; align-items:center; }
a.ar-tag:hover{ background:rgba(255,255,255,.26); }
.ar-table-wrap{ overflow-x:auto; margin:14px 0 20px; }
.ar-table-wrap .ar-table{ margin:0; }
.ar-table-wrap .ar-table:has(th:nth-child(3)){ min-width:520px; }
.ar-small{ font-size:13.5px !important; color:var(--bl-muted) !important; }
.ar-series{ margin:4px 0 28px; border:1px solid #d6e8fb; background:linear-gradient(135deg,#f3f9ff,#fbfdff); border-radius:18px; padding:18px 20px; }
.ar-series-head{ font-weight:600; color:var(--bl-blue-d); display:flex; gap:8px; align-items:center; margin-bottom:10px; }
.ar-series ol{ list-style:none; margin:0 0 12px !important; padding:0 !important; display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:4px 14px; }
.ar-series li{ margin:0 !important; font-size:14px !important; line-height:1.5 !important; }
.ar-series li a{ display:flex; gap:8px; padding:5px 6px; border-radius:8px; text-decoration:none; color:var(--bl-ink); }
.ar-series li a:hover{ background:#fff; }
.ar-series li b{ flex:0 0 22px; height:22px; border-radius:7px; display:grid; place-items:center; font-size:12px; background:#e0eefc; color:var(--bl-blue-d); }
.ar-series li.on a{ color:var(--bl-blue-d); font-weight:600; } .ar-series li.on b{ background:var(--bl-blue); color:#fff; }
.ar-series-nav{ display:flex; justify-content:space-between; gap:10px; flex-wrap:wrap; border-top:1px solid #d6e8fb; padding-top:12px; }
.ar-series-nav a{ font-size:14.5px; font-weight:600; color:var(--bl-blue-d); text-decoration:none; }
.ar-series-nav a:hover{ text-decoration:underline; }
.ar-series-nav .sn-next{ margin-left:auto; text-align:right; }
.ar-share{ margin-top:30px; display:flex; align-items:center; gap:10px; flex-wrap:wrap; padding-top:18px; border-top:1px solid var(--bl-line); }
.ar-share span{ font-weight:600; color:var(--bl-navy); margin-right:4px; }
.ar-share a, .ar-share button{ width:40px; height:40px; border-radius:12px; display:grid; place-items:center; border:0; cursor:pointer; color:#fff !important; font-size:17px; text-decoration:none; transition:transform .2s; }
.ar-share a:hover, .ar-share button:hover{ transform:translateY(-2px); }
.ar-share .s-line{ background:#06c755; } .ar-share .s-fb{ background:#1877f2; } .ar-share .s-copy{ background:#334155; }
.ar-share .s-copy.done{ background:#16a34a; }
.ar-related{ background:#fff; border-top:1px solid var(--bl-line); padding:46px 20px 56px; }
.ar-related-in{ max-width:1180px; margin:0 auto; }
.ar-related h2{ margin:0 0 20px; font-size:26px; color:var(--bl-navy); }
.ar-all{ text-align:center; margin:24px 0 0; } .ar-all a{ font-weight:600; color:var(--bl-blue); text-decoration:none; }

/* ---------- responsive ---------- */
@media (max-width:1100px){
  .bl-grid{ grid-template-columns:repeat(2,minmax(0,1fr)); }
  .bl-feature{ grid-template-columns:1fr; }
  .bl-learn-head{ grid-template-columns:1fr; gap:20px; }
}
@media (max-width:767px){
  .bl-hero{ padding:36px 0 96px; }
  .bl-hero > .container > p{ font-size:15.5px; }
  .bl-feat-main{ min-height:340px; border-radius:20px; }
  .bl-feat-txt{ padding:20px; } .bl-feat-txt p{ display:none; }
  .bl-learn{ padding:22px 16px; border-radius:20px; }
  .bl-learn-list a{ grid-template-columns:36px 1fr 12px; } .bl-learn-list .k{ display:none; }
  .bl-learn-list .n{ width:36px; height:36px; }
  .bl-grid{ grid-template-columns:1fr; gap:14px; }
  .bl-chips{ flex-wrap:nowrap; overflow-x:auto; padding-bottom:6px; margin:0 -16px; padding-left:16px; padding-right:16px; scrollbar-width:none; }
  .bl-chips::-webkit-scrollbar{ display:none; }
  .bl-chips button{ flex:0 0 auto; }
  .bl-all-head{ display:block; } .bl-all-head h2{ margin-bottom:12px; }
  .bl-cta{ padding:26px 20px; text-align:center; justify-content:center; }
  .ar-series ol{ grid-template-columns:1fr; }
  .ar-related{ padding:34px 16px 44px; }
}