/* ===========================================================
   blog.css — khu Blog của nguyendotrongan.vn
   Dùng CHUNG token với styles.css (:root đã khai báo ở đó).
   File riêng để không đụng styles.css (tránh xung đột dual-codebase).
   =========================================================== */

.blog-wrap{
  position:relative;z-index:3;
  max-width:var(--max);
  margin:0 auto;
  padding:clamp(96px,12vh,150px) var(--pad-x) 0;
}

/* ===== Breadcrumb ===== */
.crumb{
  display:flex;align-items:center;gap:9px;flex-wrap:wrap;
  margin:0 0 26px;
  font-family:'Geist Mono',ui-monospace,'SF Mono',monospace;
  font-size:11px;letter-spacing:.04em;
  color:var(--ink-3);
  text-transform:uppercase;
}
.crumb a{color:var(--ink-3);transition:color var(--t-fast)}
.crumb a:hover{color:var(--ink)}
.crumb .sep{color:var(--mute)}
.crumb .now{
  background:var(--gradient);
  -webkit-background-clip:text;background-clip:text;
  -webkit-text-fill-color:transparent;color:transparent;
}

/* ===== Blog index ===== */
.blog-head{
  padding-bottom:56px;
  border-bottom:1px solid var(--border);
  margin-bottom:56px;
}
.blog-title{
  margin:0 0 20px;
  font-family:'Geist','Inter',sans-serif;
  font-size:clamp(40px,7vw,92px);
  line-height:1.06;
  letter-spacing:-.04em;
  font-weight:600;
  color:var(--ink);
}
.blog-title .dot{font-style:normal}
.blog-intro{
  margin:0;
  max-width:64ch;
  font-size:clamp(16px,1.5vw,20px);
  line-height:1.65;
  letter-spacing:-.008em;
  color:var(--ink-2);
}

.post-list{
  list-style:none;margin:0;padding:0;
  display:flex;flex-direction:column;gap:20px;
  padding-bottom:140px;
}
.post-card{
  position:relative;
  border-radius:24px;
  background:var(--card);
  border:1px solid var(--border);
  overflow:hidden;
  isolation:isolate;
  transition:border-color var(--t-mid), background-color var(--t-mid);
}
.post-card::before{
  content:"";position:absolute;inset:0;
  border-radius:24px;padding:1px;
  background:var(--gradient);
  -webkit-mask:linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite:xor;mask-composite:exclude;
  opacity:0;transition:opacity var(--t-mid);
  pointer-events:none;z-index:2;
}
.post-card:hover::before{opacity:1}
.post-card:hover{background:rgba(255,255,255,.04)}
.post-card-link{
  display:grid;
  grid-template-columns:1fr auto;
  align-items:center;gap:32px;
  padding:40px 36px;
}
.post-card-body{display:flex;flex-direction:column;gap:16px;min-width:0}
.post-card-meta{
  display:flex;align-items:center;gap:10px;flex-wrap:wrap;
  font-family:'Geist Mono',ui-monospace,monospace;
  font-size:11px;letter-spacing:.04em;
  color:var(--ink-3);
}
.post-card-meta .pill{
  display:inline-flex;align-items:center;
  padding:4px 11px;border-radius:999px;
  border:1px solid var(--border-2);
  background:rgba(255,255,255,.04);
  color:var(--ink-2);
}
.post-card-name{
  margin:0;
  font-size:clamp(24px,3.2vw,40px);
  line-height:1.22;
  letter-spacing:-.028em;
  font-weight:600;
  color:var(--ink);
  /* Stops nằm gọn trong 35–64% để trạng thái nghỉ (position 100%) và
     kết thúc hover (position 0) đều là màu chữ đặc — vệt sáng chỉ chạy giữa chừng. */
  background:linear-gradient(120deg,var(--ink) 0%,var(--ink) 35%,#4f8aff 45%,#a07cff 55%,var(--ink) 64%,var(--ink) 100%);
  background-size:300% 100%;background-position:100% 0;
  -webkit-background-clip:text;background-clip:text;color:transparent;
  transition:background-position .9s var(--t-mid);
}
.post-card:hover .post-card-name{background-position:0 0}
.post-card-desc{
  margin:0;
  font-size:clamp(14px,1.15vw,16px);
  line-height:1.68;letter-spacing:-.005em;
  color:var(--ink-2);
}
.post-card-arrow{
  display:inline-flex;align-items:center;justify-content:center;
  width:52px;height:52px;border-radius:50%;
  background:rgba(255,255,255,.04);
  border:1px solid var(--border-2);
  color:var(--ink);flex-shrink:0;
  transition:background var(--t-fast), color var(--t-fast), border-color var(--t-fast), transform var(--t-mid), box-shadow var(--t-mid);
}
.post-card:hover .post-card-arrow{
  background:var(--gradient);border-color:transparent;color:#0a0a0c;
  transform:translate(4px,-4px);
  box-shadow:0 0 30px rgba(160,124,255,.4);
}

/* ===== Article ===== */
.post{
  position:relative;z-index:3;
  max-width:800px;
  margin:0 auto;
  padding:clamp(96px,12vh,150px) var(--pad-x) 0;
}
.post-header{padding-bottom:40px}
.post-kicker{
  display:inline-flex;align-items:center;gap:8px;
  padding:5px 13px;border-radius:999px;
  border:1px solid rgba(160,124,255,.3);
  background:rgba(160,124,255,.09);
  font-family:'Geist Mono',ui-monospace,monospace;
  font-size:10px;letter-spacing:.06em;text-transform:uppercase;
  color:#c3aaff;
  margin-bottom:22px;
}
.post-h1{
  margin:0 0 26px;
  font-family:'Geist','Inter',sans-serif;
  font-size:clamp(32px,5.2vw,60px);
  line-height:1.13;
  letter-spacing:-.035em;
  font-weight:600;
  color:var(--ink);
  text-wrap:balance;
}
.post-standfirst{
  margin:0 0 30px;
  font-size:clamp(17px,1.65vw,22px);
  line-height:1.62;
  letter-spacing:-.01em;
  color:var(--ink-2);
  text-wrap:pretty;
}
.post-meta{
  display:flex;align-items:center;gap:8px;flex-wrap:wrap;
  padding:18px 0;
  border-top:1px solid var(--border);
  border-bottom:1px solid var(--border);
  font-family:'Geist Mono',ui-monospace,monospace;
  font-size:11px;letter-spacing:.04em;
  color:var(--ink-3);
}
.post-meta .who{color:var(--ink-2)}
.post-meta .sep{color:var(--mute)}
.post-meta .langlink{
  margin-left:auto;
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:999px;
  border:1px solid var(--border-2);
  background:rgba(255,255,255,.04);
  color:var(--ink-2);
  transition:border-color var(--t-fast), color var(--t-fast), background var(--t-fast);
}
.post-meta .langlink:hover{
  border-color:rgba(160,124,255,.5);
  background:rgba(160,124,255,.1);
  color:var(--ink);
}

/* ===== Film fact card ===== */
.film-card{
  margin:36px 0 4px;
  padding:26px 28px;
  border:1px solid var(--border);
  border-radius:20px;
  background:var(--card);
}
.film-card h2{
  margin:0 0 16px;
  font-family:'Geist Mono',ui-monospace,monospace;
  font-size:11px;letter-spacing:.08em;text-transform:uppercase;
  font-weight:500;
  color:var(--ink-3);
}
.film-card dl{
  margin:0;
  display:grid;
  grid-template-columns:auto 1fr;
  gap:10px 22px;
  font-size:14px;line-height:1.6;
}
.film-card dt{
  color:var(--ink-3);
  font-family:'Geist Mono',ui-monospace,monospace;
  font-size:11px;letter-spacing:.03em;
  text-transform:uppercase;
  padding-top:2px;
  white-space:nowrap;
}
.film-card dd{margin:0;color:var(--ink-2);letter-spacing:-.005em}
.film-card dd b{color:var(--ink);font-weight:500}

/* ===== TOC ===== */
.post-toc{
  margin:32px 0 12px;
  border:1px solid var(--border);
  border-radius:20px;
  background:var(--card);
  overflow:hidden;
}
.post-toc > summary{
  list-style:none;cursor:pointer;
  padding:20px 26px;
  display:flex;align-items:center;gap:12px;
  font-family:'Geist Mono',ui-monospace,monospace;
  font-size:11px;letter-spacing:.08em;text-transform:uppercase;
  color:var(--ink-2);
  user-select:none;
  transition:color var(--t-fast);
}
.post-toc > summary::-webkit-details-marker{display:none}
.post-toc > summary:hover{color:var(--ink)}
.post-toc > summary::after{
  content:"+";margin-left:auto;
  font-size:15px;color:var(--ink-3);
  transition:transform .3s var(--t-mid);
}
.post-toc[open] > summary::after{transform:rotate(45deg)}
.post-toc ol{
  margin:0;padding:0 26px 24px 44px;
  counter-reset:toc;
  list-style:none;
}
.post-toc li{
  counter-increment:toc;
  position:relative;
  padding:7px 0;
  font-size:14.5px;line-height:1.5;
  letter-spacing:-.005em;
}
.post-toc li::before{
  content:counter(toc,decimal-leading-zero);
  position:absolute;left:-32px;top:9px;
  font-family:'Geist Mono',ui-monospace,monospace;
  font-size:10.5px;color:var(--mute);
}
.post-toc a{color:var(--ink-2);transition:color var(--t-fast)}
.post-toc a:hover{color:var(--ink)}

/* ===== Body ===== */
.post-body{
  padding:16px 0 0;
  font-size:clamp(16.5px,1.35vw,18.5px);
  line-height:1.78;
  letter-spacing:-.006em;
  color:#d0d0dc;
}
.post-body p{margin:0 0 1.15em;text-wrap:pretty}
.post-body h2{
  margin:2.6em 0 .9em;
  scroll-margin-top:90px;
  font-family:'Geist','Inter',sans-serif;
  font-size:clamp(23px,2.7vw,33px);
  line-height:1.24;
  letter-spacing:-.028em;
  font-weight:600;
  color:var(--ink);
  text-wrap:balance;
}
.post-body h2::before{
  content:"";
  display:block;
  width:44px;height:2px;
  margin-bottom:18px;
  border-radius:2px;
  background:var(--gradient);
  opacity:.75;
}
.post-body h3{
  margin:2em 0 .7em;
  font-size:clamp(18px,1.7vw,21px);
  line-height:1.35;letter-spacing:-.02em;
  font-weight:600;color:var(--ink);
}
.post-body em{
  font-family:inherit;
  font-style:italic;
  font-weight:400;
  background:none;
  -webkit-background-clip:initial;background-clip:initial;
  color:var(--ink);
  letter-spacing:0;
}
.post-body em::after{display:none}
.post-body strong{color:var(--ink);font-weight:600}
.post-body a:not(.post-card-link){
  color:#9db6ff;
  text-decoration:underline;
  text-decoration-color:rgba(157,182,255,.35);
  text-underline-offset:3px;
  transition:color var(--t-fast), text-decoration-color var(--t-fast);
}
.post-body a:not(.post-card-link):hover{
  color:#c3aaff;
  text-decoration-color:rgba(195,170,255,.7);
}
.post-body hr{
  border:0;height:1px;
  margin:3em 0;
  background:linear-gradient(90deg,transparent,var(--border-2),transparent);
}
.post-body blockquote{
  margin:2em 0;
  padding:22px 26px;
  border-left:2px solid transparent;
  border-image:var(--gradient) 1;
  background:rgba(255,255,255,.022);
  border-radius:0 16px 16px 0;
  font-size:1.02em;
  line-height:1.7;
  color:var(--ink);
}
.post-body blockquote p{margin:0 0 .5em}
.post-body blockquote p:last-child{margin:0}
.post-body blockquote cite{
  display:block;margin-top:12px;
  font-style:normal;
  font-family:'Geist Mono',ui-monospace,monospace;
  font-size:11px;letter-spacing:.04em;
  color:var(--ink-3);
}
/* Truyện: mọi dòng cách nhau bằng nhau, không phân nhóm */
.post-body .beat{
  margin:0 0 .85em;
}
.post-body .lede{
  font-size:1.06em;
  color:var(--ink-2);
}

/* ===== FAQ ===== */
.post-faq{
  margin:80px 0 0;
  padding-top:48px;
  border-top:1px solid var(--border);
}
.post-faq > h2{
  margin:0 0 24px;
  font-size:clamp(22px,2.4vw,30px);
  line-height:1.25;letter-spacing:-.028em;
  font-weight:600;color:var(--ink);
}
.faq-item{
  border:1px solid var(--border);
  border-radius:16px;
  background:var(--card);
  margin-bottom:12px;
  overflow:hidden;
  transition:border-color var(--t-fast);
}
.faq-item[open]{border-color:var(--border-2)}
.faq-item summary{
  list-style:none;cursor:pointer;
  padding:18px 24px;
  display:flex;align-items:flex-start;gap:14px;
  font-size:16px;font-weight:500;letter-spacing:-.01em;
  color:var(--ink);line-height:1.5;
  user-select:none;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:"+";margin-left:auto;flex-shrink:0;
  font-family:'Geist Mono',monospace;font-size:16px;
  color:var(--ink-3);
  transition:transform .3s var(--t-mid);
}
.faq-item[open] summary::after{transform:rotate(45deg)}
.faq-item .faq-a{
  padding:0 24px 20px;
  font-size:15.5px;line-height:1.72;
  letter-spacing:-.005em;
  color:var(--ink-2);
}
.faq-item .faq-a p{margin:0 0 .8em}
.faq-item .faq-a p:last-child{margin:0}

/* ===== Post footer ===== */
.post-foot{
  margin:72px 0 0;
  padding:36px 0 0;
  border-top:1px solid var(--border);
  display:flex;gap:14px;flex-wrap:wrap;align-items:center;
  padding-bottom:20px;
}
.post-foot .ghost{
  display:inline-flex;align-items:center;gap:9px;
  padding:11px 20px;border-radius:999px;
  border:1px solid var(--border-2);
  background:rgba(255,255,255,.04);
  color:var(--ink-2);
  font-size:14px;font-weight:500;letter-spacing:-.005em;
  transition:border-color var(--t-fast), background var(--t-fast), color var(--t-fast), transform var(--t-fast);
}
.post-foot .ghost:hover{
  border-color:rgba(160,124,255,.5);
  background:rgba(160,124,255,.1);
  color:var(--ink);
  transform:translateY(-1px);
}

/* ===== Subscribe block on blog ===== */
/* Cùng khuôn với khối đăng ký ở trang chủ (.notify-sub trong styles.css) */
.blog-sub{
  margin:20px 0 0;
  display:grid;
  grid-template-columns:auto 1fr;
  gap:32px;
  align-items:center;
  padding:24px 28px;
  background:var(--card);
  border:1px solid var(--border);
  border-radius:24px;
}

/* ===== Reading progress ===== */
.read-bar{
  position:fixed;top:0;left:0;right:0;height:2px;z-index:100;
  pointer-events:none;background:transparent;
}
.read-bar span{
  display:block;height:100%;width:0;
  background:var(--gradient);
  box-shadow:0 0 16px rgba(79,138,255,.5);
}

/* ===== Back-to-top ===== */
.to-top{
  position:fixed;
  right:clamp(14px,2.2vw,26px);
  bottom:clamp(18px,3vw,32px);
  z-index:90;
  width:46px;height:46px;border-radius:50%;
  display:inline-flex;align-items:center;justify-content:center;
  background:rgba(14,14,20,.72);
  border:1px solid var(--border-2);
  color:var(--ink-2);
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  cursor:pointer;
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .3s var(--t-mid), transform .3s var(--t-mid), visibility .3s, border-color var(--t-fast), color var(--t-fast);
}
.to-top.is-on{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{border-color:rgba(160,124,255,.5);color:var(--ink)}

/* ===== Site footer (blog) ===== */
.blog-footer{
  position:relative;z-index:3;
  max-width:var(--max);margin:0 auto;
  padding:60px var(--pad-x) 70px;
  border-top:1px solid var(--border);
  margin-top:90px;
  display:flex;justify-content:space-between;align-items:center;
  gap:20px;flex-wrap:wrap;
  font-family:'Geist Mono',ui-monospace,monospace;
  font-size:11px;letter-spacing:.04em;
  color:var(--ink-3);
}
.blog-footer a{color:var(--ink-3);transition:color var(--t-fast)}
.blog-footer a:hover{color:var(--ink)}
.blog-footer .links{display:flex;gap:18px;flex-wrap:wrap}

/* ===== Homepage "Viết" section ===== */
.writing{
  padding:0 var(--pad-x) 140px;
  max-width:var(--max);
  margin:0 auto;
  position:relative;
}
.writing .post-list{padding-bottom:0}

@media (max-width:760px){
  .post-card-link{grid-template-columns:1fr;gap:22px;padding:30px 24px}
  .post-card-arrow{justify-self:flex-start}
  .film-card dl{grid-template-columns:1fr;gap:4px 0}
  .film-card dt{padding-top:10px}
  .writing{padding:0 var(--pad-x) 90px}
  .blog-footer{margin-top:60px;padding:44px var(--pad-x) 56px}
  .blog-sub{grid-template-columns:1fr;gap:14px;padding:22px;align-items:stretch}
}
@media (max-width:480px){
  .post{padding-top:88px}
  .blog-wrap{padding-top:88px}
  .post-card,.post-toc,.film-card,.blog-sub{border-radius:18px}
  .post-card::before{display:none}
  .post-card-link{padding:26px 20px}
  .film-card,.blog-sub{padding:22px 20px}
  .post-toc > summary{padding:17px 20px}
  .post-toc ol{padding:0 20px 20px 38px}
  .post-body{font-size:16.5px;line-height:1.76}
  .post-meta{gap:6px;font-size:10px}
  .post-meta .langlink{margin-left:0;margin-top:8px}
  .post-list{padding-bottom:90px}
}