/*
Theme Name: Tam Long.vn
Description: Theme cá nhân Trần Tống Thanh Tâm — ngôn ngữ thiết kế long.vn (nền đen ink + vàng đồng, Montserrat + Playfair Display). Trang chủ front-page.php + skin bài viết/lưu trữ/trang.
Author: Brian Hưng + Claude
Version: 1.0.0
Text Domain: tam-longvn
*/

*,*::before,*::after{box-sizing:border-box}
:root{
  --ink-900:#08080A; --ink-850:#0A0A0C; --ink-800:#101013; --ink-700:#16161A; --ink-600:#1E1E23;
  --gold:#C9A24B; --gold-bright:#E7C975; --gold-deep:#8A6D2F;
  --gold-glow:rgba(201,162,75,.35);
  --hairline:rgba(201,162,75,.18); --hairline-soft:rgba(242,239,233,.08);
  --paper:#F2EFE9; --paper-dim:#C9C5BC; --muted:#87837A;
  --maxw:1280px; --gutter:clamp(20px,5vw,72px);
  --ff:'Montserrat',system-ui,-apple-system,sans-serif;
  --serif:'Playfair Display',Georgia,serif;
  --ease:cubic-bezier(.22,1,.36,1);
}
html{scroll-behavior:smooth}
body{margin:0;background:var(--ink-900);color:var(--paper);font-family:var(--ff);font-size:16px;line-height:1.7;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 var(--gutter)}
.sec-pad{padding:clamp(72px,9vw,110px) 0}
.vig{background:var(--ink-850)}

.eyebrow{display:inline-block;font-size:12px;font-weight:700;letter-spacing:.32em;text-transform:uppercase;color:var(--gold)}
.h-xl{font-weight:900;text-transform:uppercase;letter-spacing:.01em;line-height:1.02;font-size:clamp(44px,8.2vw,108px);margin:0}
.h-lg{font-weight:800;text-transform:uppercase;letter-spacing:.01em;line-height:1.08;font-size:clamp(30px,4vw,48px);margin:0}
.gradient-gold{background:linear-gradient(100deg,var(--gold-deep) 0%,var(--gold) 35%,var(--gold-bright) 60%,var(--gold) 100%);-webkit-background-clip:text;background-clip:text;color:transparent}
.lede{color:var(--paper-dim);font-size:clamp(16px,1.4vw,18.5px);max-width:36em}
.serif-q{font-family:var(--serif);font-style:italic;font-weight:500;color:var(--paper);line-height:1.45}

.btn{display:inline-flex;align-items:center;gap:10px;font:700 13px/1 var(--ff);letter-spacing:.18em;text-transform:uppercase;padding:18px 32px;border:1px solid transparent;transition:.35s var(--ease);cursor:pointer}
.btn .arr{transition:transform .35s var(--ease)}
.btn:hover .arr{transform:translateX(5px)}
.btn-gold{background:linear-gradient(120deg,var(--gold-deep),var(--gold) 55%,var(--gold-bright));color:var(--ink-900);box-shadow:0 10px 34px -12px var(--gold-glow)}
.btn-gold:hover{filter:brightness(1.08)}
.btn-ghost{border-color:var(--hairline);color:var(--paper)}
.btn-ghost:hover{border-color:var(--gold);color:var(--gold-bright)}

/* HEADER */
.site-header{position:fixed;inset:0 0 auto 0;z-index:90;transition:.35s;border-bottom:1px solid transparent}
.site-header.solid{background:rgba(8,8,10,.88);backdrop-filter:blur(12px);border-bottom-color:var(--hairline-soft)}
.nav{display:flex;align-items:center;justify-content:space-between;max-width:var(--maxw);margin:0 auto;padding:18px var(--gutter)}
.brand{font-weight:900;text-transform:uppercase;letter-spacing:.08em;font-size:15px;line-height:1.15}
.brand small{display:block;font-size:9.5px;font-weight:700;letter-spacing:.34em;color:var(--gold)}
.nav-links{display:flex;gap:34px;align-items:center;font-size:12.5px;font-weight:700;letter-spacing:.16em;text-transform:uppercase}
.nav-links a{color:var(--paper-dim);transition:.25s}
.nav-links a:hover{color:var(--gold-bright)}
.nav-cta{border:1px solid var(--hairline);padding:11px 20px;color:var(--paper)!important}
.nav-cta:hover{border-color:var(--gold);color:var(--gold-bright)!important}

/* HERO (front) */
.hero{position:relative;min-height:100svh;display:flex;align-items:center;overflow:hidden}
.hero-bg{position:absolute;inset:0}
.hero-bg img{width:100%;height:100%;object-fit:cover;object-position:center 28%}
.hero-bg::after{content:"";position:absolute;inset:0;background:
  linear-gradient(90deg,rgba(8,8,10,.94) 0%,rgba(8,8,10,.82) 34%,rgba(8,8,10,.45) 62%,rgba(8,8,10,.55) 100%),
  linear-gradient(0deg,var(--ink-900) 0%,rgba(8,8,10,.18) 26%,rgba(8,8,10,.42) 100%)}
.hero-inner{position:relative;z-index:2;width:100%;padding-top:110px;padding-bottom:120px}
.hero .tag-line{margin-bottom:26px}
.hero h1{margin:0 0 26px}
.hero .sub{margin-bottom:38px}
.hero-cta{display:flex;gap:16px;flex-wrap:wrap}
.hero-rail{position:absolute;z-index:2;right:var(--gutter);bottom:110px;display:flex;flex-direction:column;gap:26px;text-align:right}
.hero-rail .stat .n{font-weight:900;font-size:30px;color:var(--gold-bright);line-height:1;font-variant-numeric:tabular-nums}
.hero-rail .stat .l{font-size:11px;font-weight:700;letter-spacing:.2em;text-transform:uppercase;color:var(--paper-dim);margin-top:6px}
.scroll-cue{position:absolute;z-index:2;left:var(--gutter);bottom:34px;display:flex;align-items:center;gap:12px;font-size:10.5px;font-weight:700;letter-spacing:.3em;text-transform:uppercase;color:var(--muted)}
.scroll-cue .bar{width:52px;height:1px;background:var(--gold);display:inline-block;animation:pulse 2.2s infinite}
@keyframes pulse{0%,100%{opacity:.35}50%{opacity:1}}

/* MARQUEE */
.marquee{border-top:1px solid var(--hairline);border-bottom:1px solid var(--hairline);padding:20px 0;overflow:hidden;background:var(--ink-850)}
.marquee-track{display:flex;gap:56px;width:max-content;animation:mq 36s linear infinite;white-space:nowrap}
.marquee span{font-size:12.5px;font-weight:800;letter-spacing:.26em;text-transform:uppercase;color:var(--paper-dim)}
.marquee i{color:var(--gold);font-style:normal}
@keyframes mq{to{transform:translateX(-50%)}}

/* STORY */
.story-grid{display:grid;grid-template-columns:.92fr 1.08fr;gap:clamp(40px,6vw,84px);align-items:center}
.story-img{position:relative}
.story-img img{width:100%;aspect-ratio:4/5;object-fit:cover;filter:saturate(.94)}
.story-img::before{content:"";position:absolute;inset:18px -18px -18px 18px;border:1px solid var(--hairline);z-index:-1}
.year-chip{position:absolute;left:-14px;top:26px;background:var(--ink-900);border:1px solid var(--hairline);padding:12px 18px;font-weight:900;color:var(--gold-bright);font-size:20px;line-height:1}
.year-chip small{display:block;font-size:9.5px;font-weight:700;letter-spacing:.26em;color:var(--paper-dim);margin-top:5px}
.story-copy .eyebrow{margin-bottom:18px}
.story-copy h2{margin-bottom:26px}
.story-copy p{color:var(--paper-dim);margin:0 0 18px;max-width:38em}
.count-row{display:flex;gap:clamp(28px,4vw,56px);flex-wrap:wrap;margin:34px 0 36px;border-top:1px solid var(--hairline-soft);padding-top:30px}
.count .n{font-weight:900;font-size:clamp(30px,3vw,40px);color:var(--gold-bright);line-height:1;font-variant-numeric:tabular-nums}
.count .l{font-size:11.5px;font-weight:700;letter-spacing:.16em;text-transform:uppercase;color:var(--muted);margin-top:8px;max-width:15em}
.link-gold{font-size:12.5px;font-weight:800;letter-spacing:.2em;text-transform:uppercase;color:var(--gold);border-bottom:1px solid var(--hairline);padding-bottom:6px;transition:.25s}
.link-gold:hover{color:var(--gold-bright);border-color:var(--gold)}

/* PHILOSOPHY */
.phi-grid{display:grid;grid-template-columns:.62fr 1.38fr;gap:clamp(36px,5vw,72px);align-items:center;margin-bottom:clamp(48px,6vw,72px)}
.phi-img{position:relative;max-width:380px}
.phi-img img{width:100%;aspect-ratio:3/4;object-fit:cover;object-position:center top}
.phi-img::after{content:"";position:absolute;inset:0;border:1px solid var(--hairline);transform:translate(-14px,14px);pointer-events:none}
.phi-quote .serif-q{font-size:clamp(22px,3vw,34px);margin:0}
.phi-quote .who{margin-top:22px;font-size:11.5px;font-weight:800;letter-spacing:.3em;text-transform:uppercase;color:var(--muted)}
.pillars{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--hairline);border-left:1px solid var(--hairline)}
.pillar{border-right:1px solid var(--hairline);border-bottom:1px solid var(--hairline);padding:clamp(26px,3vw,40px)}
.pillar .num{font-weight:900;color:var(--gold);font-size:14px;letter-spacing:.2em;margin-bottom:16px}
.pillar h3{font-size:16.5px;font-weight:800;text-transform:uppercase;letter-spacing:.06em;margin:0 0 12px}
.pillar p{font-size:14.5px;color:var(--paper-dim);margin:0}

/* FLAGSHIP */
.flag-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:clamp(40px,6vw,80px);align-items:center}
.flag-copy .star{color:var(--gold);letter-spacing:.3em;font-size:12px;font-weight:800;text-transform:uppercase;margin-bottom:20px;display:inline-block}
.flag-copy h2{margin-bottom:24px}
.flag-copy p{color:var(--paper-dim);max-width:36em;margin:0 0 34px}
.flag-img{position:relative}
.flag-img img{width:100%;aspect-ratio:3/4;object-fit:cover;object-position:center top}
.flag-img::after{content:"";position:absolute;inset:0;border:1px solid var(--hairline);transform:translate(16px,16px);pointer-events:none}

/* CARDS */
.head-row{display:flex;align-items:end;justify-content:space-between;gap:24px;margin-bottom:clamp(36px,5vw,56px);flex-wrap:wrap}
.head-row .eyebrow{margin-bottom:14px}
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.card{background:var(--ink-800);border:1px solid var(--hairline-soft);display:flex;flex-direction:column;transition:.4s var(--ease)}
.card:hover{transform:translateY(-6px);border-color:var(--hairline)}
.card .thumb{aspect-ratio:16/10;overflow:hidden}
.card .thumb img{width:100%;height:100%;object-fit:cover;transition:1.2s var(--ease)}
.card:hover .thumb img{transform:scale(1.05)}
.card .in{padding:28px 26px 30px;display:flex;flex-direction:column;gap:12px;flex:1}
.card .kick{font-size:10.5px;font-weight:800;letter-spacing:.26em;text-transform:uppercase;color:var(--gold)}
.card h3{font-size:19px;font-weight:800;text-transform:uppercase;letter-spacing:.03em;line-height:1.25;margin:0}
.card p{font-size:14.5px;color:var(--paper-dim);margin:0}
.card .more{margin-top:auto;padding-top:14px;font-size:12px;font-weight:800;letter-spacing:.2em;text-transform:uppercase;color:var(--gold)}

/* MVITA BAND */
.mvita{border:1px solid var(--hairline);background:linear-gradient(120deg,var(--ink-800),var(--ink-850));padding:clamp(30px,4vw,46px);display:grid;grid-template-columns:1fr auto;gap:28px;align-items:center;margin-top:26px}
.mvita h3{font-size:clamp(19px,2vw,24px);font-weight:800;text-transform:uppercase;letter-spacing:.04em;margin:10px 0 12px}
.mvita p{color:var(--paper-dim);font-size:15px;max-width:46em;margin:0}

/* IMPACT */
.impact{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;text-align:center}
.imp{border:1px solid var(--hairline-soft);padding:clamp(28px,3.4vw,44px) 18px;background:var(--ink-850)}
.imp .n{font-weight:900;font-size:clamp(28px,3.2vw,42px);color:var(--gold-bright);line-height:1;font-variant-numeric:tabular-nums}
.imp .l{margin-top:12px;font-size:11px;font-weight:700;letter-spacing:.18em;text-transform:uppercase;color:var(--paper-dim)}

/* TESTI */
.testis{display:grid;grid-template-columns:repeat(3,1fr);gap:clamp(24px,3vw,40px)}
.testi{border-top:1px solid var(--hairline);padding-top:28px}
.testi .serif-q{font-size:18.5px;margin:0}
.testi .who{margin-top:22px;font-size:12.5px;font-weight:800;letter-spacing:.18em;text-transform:uppercase;color:var(--gold-bright)}
.testi .role{font-size:12px;color:var(--muted);margin-top:5px;letter-spacing:.06em}

/* POST ROWS (front + archive) */
.post-row{display:grid;grid-template-columns:auto 1fr auto;gap:clamp(18px,3vw,40px);align-items:center;padding:26px 0;border-bottom:1px solid var(--hairline-soft);transition:.3s}
.post-row:first-of-type{border-top:1px solid var(--hairline-soft)}
.post-row:hover h3{color:var(--gold-bright)}
.post-row .meta{font-size:10.5px;font-weight:800;letter-spacing:.22em;text-transform:uppercase;color:var(--gold);white-space:nowrap}
.post-row h3{font-size:clamp(16px,1.8vw,21px);font-weight:800;text-transform:uppercase;letter-spacing:.02em;line-height:1.35;transition:.3s;margin:0}
.post-row .go{font-size:11.5px;font-weight:800;letter-spacing:.2em;text-transform:uppercase;color:var(--paper-dim);white-space:nowrap}

/* FINAL CTA */
.final{text-align:center}
.final .eyebrow{margin-bottom:22px}
.final h2{margin-bottom:22px}
.final .lede{margin:0 auto 40px}
.final .hero-cta{justify-content:center}

/* FOOTER */
.site-footer{border-top:1px solid var(--hairline);background:var(--ink-850);padding:clamp(48px,6vw,72px) 0 32px}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.3fr;gap:38px}
.foot-grid h4{font-size:11px;font-weight:800;letter-spacing:.26em;text-transform:uppercase;color:var(--gold);margin:0 0 18px}
.foot-grid ul{margin:0;padding:0;list-style:none}
.foot-grid li{margin-bottom:10px}
.foot-grid a,.foot-grid p{color:var(--paper-dim);font-size:14px;margin:0}
.foot-grid a:hover{color:var(--gold-bright)}
.foot-about{max-width:30em;margin-top:16px!important;line-height:1.75}
.copy-line{border-top:1px solid var(--hairline-soft);margin-top:46px;padding-top:24px;display:flex;justify-content:space-between;gap:18px;flex-wrap:wrap;color:var(--muted);font-size:12.5px;letter-spacing:.04em}

/* REVEAL */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .9s var(--ease),transform .9s var(--ease)}
.reveal.in{opacity:1;transform:none}
.no-js .reveal{opacity:1;transform:none}

/* ===== SINGLE POST / ARCHIVE / PAGE ===== */
.post-hero{padding:clamp(140px,16vw,190px) 0 clamp(28px,4vw,44px)}
.post-hero .eyebrow{margin-bottom:20px}
.post-hero h1{font-weight:900;text-transform:uppercase;letter-spacing:.01em;line-height:1.12;font-size:clamp(28px,4.4vw,54px);margin:0;max-width:20em}
.post-hero .pmeta{margin-top:22px;font-size:12px;font-weight:700;letter-spacing:.18em;text-transform:uppercase;color:var(--muted)}
.post-feat{margin:clamp(24px,4vw,40px) 0 0;position:relative}
.post-feat img{width:100%;max-height:560px;object-fit:cover;border:1px solid var(--hairline-soft)}
.prose{max-width:760px;margin:0 auto;padding:clamp(40px,6vw,64px) 0 clamp(56px,7vw,84px);font-size:17.5px;line-height:1.85;color:var(--paper-dim)}
.prose>*{margin:0 0 1.35em}
.prose h2{font-family:var(--ff);font-weight:800;text-transform:uppercase;letter-spacing:.03em;font-size:clamp(20px,2.4vw,27px);color:var(--paper);border-top:1px solid var(--hairline);padding-top:1.1em;margin-top:1.8em}
.prose h3{font-weight:800;font-size:clamp(17px,2vw,21px);color:var(--paper);text-transform:uppercase;letter-spacing:.03em}
.prose h4{font-weight:800;color:var(--paper)}
.prose strong,.prose b{color:var(--paper)}
.prose a{color:var(--gold-bright);border-bottom:1px solid var(--hairline)}
.prose a:hover{color:var(--gold)}
.prose ul,.prose ol{padding-left:1.3em}
.prose li{margin-bottom:.55em}
.prose li::marker{color:var(--gold)}
.prose blockquote{font-family:var(--serif);font-style:italic;font-size:1.12em;color:var(--paper);border-left:2px solid var(--gold);margin-left:0;padding:.2em 0 .2em 1.2em}
.prose img{border:1px solid var(--hairline-soft)}
.prose figure{margin:2em 0}
.prose figcaption{font-size:13px;color:var(--muted);margin-top:10px;letter-spacing:.04em}
.prose table{width:100%;border-collapse:collapse;font-size:15px}
.prose th,.prose td{border:1px solid var(--hairline-soft);padding:10px 12px;text-align:left}
.prose th{color:var(--paper);text-transform:uppercase;font-size:12.5px;letter-spacing:.08em}
.prose hr{border:0;border-top:1px solid var(--hairline);margin:2.4em 0}
.prose .wp-block-image img{height:auto}
.post-cta{border:1px solid var(--hairline);background:linear-gradient(120deg,var(--ink-800),var(--ink-850));padding:clamp(28px,4vw,42px);margin:0 0 clamp(56px,7vw,84px)}
.post-cta h3{margin:0 0 10px;font-weight:800;text-transform:uppercase;letter-spacing:.04em;font-size:19px}
.post-cta p{margin:0 0 22px;color:var(--paper-dim);font-size:15px}
.post-nav{display:flex;justify-content:space-between;gap:20px;border-top:1px solid var(--hairline-soft);padding:26px 0 70px;font-size:13px;font-weight:700;letter-spacing:.1em;text-transform:uppercase}
.post-nav a{color:var(--paper-dim)}
.post-nav a:hover{color:var(--gold-bright)}
.archive-head{padding:clamp(150px,17vw,200px) 0 clamp(36px,5vw,56px)}
.archive-head h1{font-weight:900;text-transform:uppercase;font-size:clamp(30px,5vw,60px);line-height:1.05;margin:0}
.archive-head .eyebrow{margin-bottom:18px}
.archive-list{padding-bottom:clamp(64px,8vw,100px)}
.pagination{display:flex;gap:10px;padding:34px 0 0;font-weight:800;font-size:13px;letter-spacing:.12em;text-transform:uppercase}
.pagination .page-numbers{border:1px solid var(--hairline-soft);padding:10px 16px;color:var(--paper-dim)}
.pagination .page-numbers.current,.pagination .page-numbers:hover{border-color:var(--gold);color:var(--gold-bright)}
/* trang legacy tự đóng gói (sale page cũ nền sáng) */
.legacy-canvas{background:#fff;color:#222;padding-top:76px}
.legacy-canvas a{color:inherit}

@media(max-width:1020px){
  .pillars{grid-template-columns:repeat(2,1fr)}
  .impact{grid-template-columns:repeat(2,1fr)}
  .hero-rail{display:none}
}
@media(max-width:860px){
  .nav-links a:not(.nav-cta){display:none}
  .story-grid,.flag-grid,.phi-grid{grid-template-columns:1fr}
  .flag-img{max-width:440px}
  .cards,.testis{grid-template-columns:1fr}
  .mvita{grid-template-columns:1fr}
  .post-row{grid-template-columns:1fr;gap:10px}
  .foot-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:560px){.foot-grid{grid-template-columns:1fr}.pillars{grid-template-columns:1fr}.impact{grid-template-columns:1fr}}