/* O2 Lawyers · Hiểu về thế giới — trang kiến thức lịch sử, kinh tế, địa chính trị */
:root{
  --paper:#F6F7F9; --surface:#FFFFFF; --ink:#13213A; --muted:#55627A; --line:#D7DEE8;
  --navy:#0F2240; --navy-2:#162D52; --navy-ink:#EEF2F8; --navy-muted:#A9B6CB;
  --brass:#8E6A2B; --brass-2:#D6B87F; --soft:#F1ECE2;
  --f:"Be Vietnam Pro",system-ui,-apple-system,"Segoe UI",sans-serif;
  --r:6px; color-scheme:light;
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){
  --paper:#0C1424; --surface:#15213A; --ink:#E8EDF5; --muted:#A0ACC0; --line:#26344F;
  --navy:#070D19; --navy-2:#0E1830; --brass:#D6B87F; --soft:#1B2640; color-scheme:dark}}
:root[data-theme="dark"]{--paper:#0C1424; --surface:#15213A; --ink:#E8EDF5; --muted:#A0ACC0; --line:#26344F; --navy:#070D19; --navy-2:#0E1830; --brass:#D6B87F; --soft:#1B2640; color-scheme:dark}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--f);font-size:17px;line-height:1.75;text-wrap:pretty}
h1,h2,h3{line-height:1.25;letter-spacing:-.015em;text-wrap:balance;margin:0}
a{color:inherit}
:focus-visible{outline:2px solid var(--brass);outline-offset:3px}
.switch{background:var(--navy);font-size:15px;font-weight:700;padding-inline:16px}
.switch .in{max-width:1120px;margin:0 auto;display:flex;height:46px;overflow-x:auto;scrollbar-width:none}
.switch a{display:flex;align-items:center;padding:0 16px;color:var(--navy-muted);text-decoration:none;border-bottom:3px solid transparent;white-space:nowrap}
.switch a[aria-current="page"]{color:#fff;background:var(--navy-2);border-bottom-color:var(--brass-2)}
.switch a:hover{color:var(--navy-ink)}
header.top{background:var(--surface);border-bottom:1px solid var(--line);padding-inline:16px}
header.top .in{max-width:1120px;margin:0 auto;display:flex;align-items:center;gap:16px;min-height:60px;flex-wrap:wrap}
.logo{font-weight:700;font-size:19px;text-decoration:none}
header nav{margin-left:auto;display:flex;gap:4px;flex-wrap:wrap}
header nav a{text-decoration:none;color:var(--muted);font-size:14.5px;padding:8px 10px;border-radius:var(--r)}
header nav a[aria-current="page"]{color:var(--ink);background:var(--soft)}
@media (max-width:600px){header nav{margin-left:0;width:100%}header nav a{padding:8px 6px}}
.wrap{padding-inline:16px}
.col{max-width:720px;margin:0 auto}
.wide{max-width:1120px;margin:0 auto}
.eyebrow{font-size:12px;letter-spacing:.16em;text-transform:uppercase;font-weight:600;color:var(--brass)}
.hero{padding-block:clamp(40px,6vw,72px) 28px}
.hero h1{font-size:clamp(30px,4.6vw,46px);margin:10px 0 14px}
.dek{font-size:clamp(18px,2.2vw,21px);color:var(--muted);margin:0}
.meta{font-size:13.5px;color:var(--muted);margin-top:18px;display:flex;gap:6px 14px;flex-wrap:wrap}
.cover{max-width:1120px;margin:0 auto 8px;border-radius:var(--r);overflow:hidden;aspect-ratio:21/8;background:var(--navy)}
.cover img{width:100%;height:100%;object-fit:cover;display:block;opacity:.92}
article.col{padding-block:12px 40px}
article h2{font-size:clamp(23px,3vw,29px);margin:44px 0 12px}
article h3{font-size:19px;margin:26px 0 8px}
article p{margin:0 0 16px}
article ul,article ol{margin:0 0 16px;padding-left:22px}
article li{margin-bottom:6px}
.lead{font-size:19.5px}
.lead::first-letter{float:left;font-size:3.4em;line-height:.9;padding:6px 10px 0 0;font-weight:700;color:var(--brass)}
blockquote{margin:22px 0;padding:6px 0 6px 20px;border-left:3px solid var(--brass);font-size:19px;font-style:italic}
blockquote cite{display:block;font-size:14px;font-style:normal;color:var(--muted);margin-top:6px}
.fig{margin:26px 0;background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:18px 20px}
.fig h3{margin:0 0 10px;font-size:16px}
.fig .cap{font-size:13px;color:var(--muted);margin:10px 0 0}
.tl{list-style:none;margin:0;padding:0;position:relative}
.tl li{display:grid;grid-template-columns:112px 1fr;gap:14px;padding:9px 0;border-bottom:1px solid var(--line);margin:0}
.tl li:last-child{border-bottom:0}
.tl time{font-weight:700;color:var(--brass);font-variant-numeric:tabular-nums;font-size:14.5px}
.tl span{font-size:15.5px}
@media (max-width:560px){.tl li{grid-template-columns:1fr;gap:0}}
.tw{overflow-x:auto}
table{border-collapse:collapse;width:100%;font-size:15px}
th,td{border-bottom:1px solid var(--line);padding:9px 10px;text-align:left;vertical-align:top}
th{font-size:13px;letter-spacing:.04em;text-transform:uppercase;color:var(--muted);font-weight:600}
td.n{font-variant-numeric:tabular-nums;white-space:nowrap}
.check{background:var(--soft);border-radius:var(--r);padding:18px 20px;margin:28px 0}
.check h3{margin-top:0}
.check li{font-size:15.5px}
.two{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin:20px 0}
.two > div{background:var(--surface);border:1px solid var(--line);border-top:3px solid var(--navy);border-radius:var(--r);padding:16px 18px}
.two > div:last-child{border-top-color:var(--brass)}
.two h3{margin:0 0 8px;font-size:16.5px}
.two p,.two li{font-size:15.5px}
@media (max-width:700px){.two{grid-template-columns:1fr}}
.en{margin:36px 0;padding:18px 20px;border:1px solid var(--line);border-radius:var(--r);background:var(--surface)}
.en h2{margin-top:0;font-size:20px}
.en p{font-size:15.5px}
.sources{font-size:14px;color:var(--muted)}
.sources ol{padding-left:20px}
.sources a{word-break:break-word}
.note{font-size:13.5px;color:var(--muted);border-top:1px solid var(--line);padding-top:14px;margin-top:30px}
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(290px,1fr));gap:18px;padding-block:8px 48px}
.card{display:grid;text-decoration:none;color:inherit;background:var(--surface);border:1px solid var(--line);border-radius:var(--r);overflow:hidden}
.card img{width:100%;aspect-ratio:16/9;object-fit:cover;display:block;background:var(--navy)}
.card .b{padding:16px 18px 18px;display:grid;gap:8px}
.card h2{font-size:20px}
.card p{margin:0;font-size:15px;color:var(--muted)}
.card .tag{font-size:12px;font-weight:600;color:var(--brass);letter-spacing:.08em;text-transform:uppercase}
.card:hover h2{text-decoration:underline}
.method{background:var(--surface);border:1px solid var(--line);border-left:3px solid var(--navy);border-radius:var(--r);padding:16px 18px;font-size:15px;margin-bottom:28px}
footer{background:var(--navy);color:var(--navy-muted);font-size:13px;padding:26px 16px 34px}
footer .in{max-width:1120px;margin:0 auto;display:grid;gap:6px}
footer a{color:var(--navy-ink)}
.card svg{width:100%;aspect-ratio:16/9;height:auto;display:block}

/* ===== Canh đều hai bên cho văn bản liền mạch ===== */
article p, article li, .dek, .two p, .two li, .check li, .en p, .method, .serbox p {text-align:justify;text-justify:inter-word;hyphens:auto;-webkit-hyphens:auto}
article h1, article h2, article h3, .fig, .tl span, table, .sources, .sources li, .card p {text-align:left}
.lead{text-align:justify}

/* ===== Điều hướng vị trí ===== */
.crumb{font-size:13px;color:var(--muted);margin-bottom:10px}
.crumb a{color:var(--muted);text-decoration:none}
.crumb a:hover{color:var(--brass);text-decoration:underline}

/* ===== Khối chuỗi bài trong bài viết ===== */
.rel{margin:36px 0 8px;border:1px solid var(--line);border-left:3px solid var(--brass);border-radius:var(--r);background:var(--surface);padding:16px 18px}
.rel .rh{margin:0 0 8px;font-size:14px;color:var(--muted);text-align:left}
.rel ol{margin:0 0 12px;padding-left:20px}
.rel li{font-size:15px;margin-bottom:4px;text-align:left}
.rel li[aria-current="page"] a{font-weight:700;text-decoration:none;color:var(--brass)}
.pn{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.pn a{display:grid;gap:2px;text-decoration:none;border:1px solid var(--line);border-radius:var(--r);padding:10px 12px;font-size:14.5px;font-weight:600}
.pn a:hover{border-color:var(--brass)}
.pn small{font-weight:400;color:var(--muted);font-size:12.5px}
.pn .nx{text-align:right}
@media (max-width:560px){.pn{grid-template-columns:1fr}.pn .nx{text-align:left}}
.same{font-size:14.5px;margin:12px 0 0;text-align:left}

/* ===== Trang chủ mục: bộ lọc, chuỗi bài ===== */
.filters{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:14px 16px;display:grid;gap:10px;margin-bottom:22px}
.frow{display:grid;grid-template-columns:84px 1fr;gap:10px;align-items:start}
.flab{font-size:12px;letter-spacing:.1em;text-transform:uppercase;font-weight:600;color:var(--muted);padding-top:7px}
.chips{display:flex;flex-wrap:wrap;gap:6px}
.chips button{font:inherit;font-size:13.5px;font-weight:600;padding:5px 12px;border-radius:99px;border:1px solid var(--line);background:var(--paper);color:var(--ink);cursor:pointer}
.chips button[aria-pressed="true"]{background:var(--navy);border-color:var(--navy);color:#fff}
.chips small{color:var(--muted);font-weight:400}
.chips button[aria-pressed="true"] small{color:var(--navy-muted)}
.frow input{font:inherit;font-size:15px;padding:8px 12px;border:1px solid var(--line);border-radius:var(--r);background:var(--paper);color:var(--ink);width:100%;max-width:420px}
.frow:last-of-type{grid-template-columns:84px minmax(0,420px) auto}
.reset{font:inherit;font-size:13.5px;border:0;background:none;color:var(--brass);cursor:pointer;justify-self:start;padding:8px 4px}
.count{margin:0;font-size:13px;color:var(--muted)}
@media (max-width:620px){.frow,.frow:last-of-type{grid-template-columns:1fr;gap:4px}.flab{padding-top:0}}
.card .ser{font-size:12.5px;color:var(--muted);border-top:1px solid var(--line);padding-top:8px;margin-top:2px}
.card[hidden]{display:none}
.empty{color:var(--muted)}
.sech{font-size:24px;margin:10px 0 14px}
.series{display:grid;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:18px;margin-bottom:28px}
.serbox{background:var(--surface);border:1px solid var(--line);border-top:3px solid var(--navy);border-radius:var(--r);padding:16px 18px}
.serbox h3{font-size:18px;margin:0 0 6px}
.serbox p{font-size:14.5px;color:var(--muted);margin:0 0 10px}
.serbox ol{margin:0;padding-left:20px;display:grid;gap:6px}
.serbox li{font-size:15px}
.serbox small{color:var(--muted)}
.two-col{display:grid;grid-template-columns:2fr 1fr;gap:18px;margin-bottom:48px}
@media (max-width:800px){.two-col{grid-template-columns:1fr}}
.up{margin:8px 0 0;padding-left:18px;columns:2;font-size:14.5px}
/* Bảng hai cột trên điện thoại: xếp nhãn trên, giá trị dưới */
@media (max-width:560px){
  .fig table,.fig tbody,.fig tr,.fig td{display:block;width:100%}
  .fig tr:first-child{display:none}
  .fig tr{border-bottom:1px solid var(--line);padding:8px 0}
  .fig td{border:0;padding:2px 0}
  .fig td:first-child{font-weight:600;font-size:13.5px;color:var(--muted)}
  td.n{white-space:normal}
}
/* Bài dài theo giai đoạn: mục lục, nhãn giai đoạn, mối nối, sợi chỉ xuyên suốt */
.toc{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:16px 20px;margin:28px 0}
.toc h3{margin:0 0 8px;font-size:16.5px}
.toc ol{margin:0;padding-left:22px;display:grid;gap:4px}
.toc li{font-size:15.5px;text-align:left}
.toc a{text-decoration:none;border-bottom:1px solid var(--line)}
.toc a:hover{border-bottom-color:var(--brass)}
.stage{display:block;font-size:13px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--brass);margin:60px 0 0}
.stage + h2{margin-top:6px}
article h2[id]{scroll-margin-top:16px}
.bridge{margin:26px 0;padding:14px 18px;border-left:3px solid var(--brass);background:var(--soft);border-radius:0 var(--r) var(--r) 0;font-size:15.5px}
.bridge strong{color:var(--brass)}
.two.verdict > div:first-child h3::before{content:"✓ ";color:#2E7D4F}
.two.verdict > div:last-child h3::before{content:"✗ ";color:#B04A3A}
.threads{display:grid;gap:14px;margin:20px 0}
.thread{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:16px 18px}
.thread h3{margin:0 0 8px;font-size:17px}
.thread p{font-size:15.5px;margin:6px 0}
.thread b{color:var(--brass)}
/* Ô chuyên đề trên trang chủ mục */
.tiles{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:16px;margin:8px 0 30px}
.tile{all:unset;box-sizing:border-box;cursor:pointer;position:relative;display:block;border-radius:10px;overflow:hidden;min-height:210px;background:var(--navy);color:#fff;box-shadow:0 1px 0 var(--line)}
.tile img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.tile:hover img{transform:scale(1.04)}
.tile .tb{position:relative;display:grid;gap:4px;align-content:end;min-height:210px;padding:18px 20px;background:linear-gradient(180deg,rgba(8,16,32,.25) 0%,rgba(8,16,32,.78) 38%,rgba(8,16,32,.94) 100%)}
.tile small{font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:#D6B87F;font-weight:700}
.tile strong{font-size:19px;line-height:1.3}
.tile em{font-style:normal;font-size:13.5px;color:#C9D3E3;line-height:1.5}
.tile[aria-pressed="true"]{outline:3px solid #D6B87F;outline-offset:2px}
.tile:focus-visible{outline:3px solid #D6B87F;outline-offset:2px}
/* Thành phần bài Tâm lý học hành vi */
.psy .eyebrow{color:#C2593F}
:root[data-theme="dark"] .psy .eyebrow{color:#F08A6C}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .psy .eyebrow{color:#F08A6C}}
.scene{border-left:4px solid #F08A6C;background:var(--soft);padding:16px 20px;border-radius:0 var(--r) var(--r) 0;margin:24px 0;font-size:16.5px}
.try{background:var(--surface);border:1px solid var(--line);border-top:4px solid #5FC4B8;border-radius:var(--r);padding:16px 20px;margin:26px 0}
.try > p:first-child{margin-top:0;font-weight:700}
.try summary{cursor:pointer;font-weight:700;color:var(--brass);list-style:none}
.try summary::-webkit-details-marker{display:none}
.try summary::before{content:"▸ ";}
.try details[open] summary::before{content:"▾ ";}
.try details p{margin:10px 0 0}
.verify{border:1px dashed var(--line);border-radius:var(--r);padding:16px 20px;margin:28px 0;background:var(--surface)}
.verify h3{margin:0 0 10px;font-size:16.5px}
.verify ul{margin:0;padding-left:0;list-style:none;display:grid;gap:10px}
.verify li{font-size:15.5px;padding-left:0}
.st{display:inline-block;font-size:12px;font-weight:700;letter-spacing:.04em;padding:2px 8px;border-radius:99px;margin-right:6px;vertical-align:1px;white-space:nowrap}
.st.ok{background:#DDF3EC;color:#1E6B55}.st.mid{background:#FBEED3;color:#7A5410}.st.no{background:#F9DED7;color:#8C3322}
.bars{margin:24px 0;padding:16px 20px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r)}
.bars h3{margin:0 0 12px;font-size:16px}
.bar{display:grid;grid-template-columns:minmax(120px,38%) 1fr;gap:10px;align-items:center;margin:8px 0;font-size:14.5px}
.bar .t{height:26px;background:var(--soft);border-radius:4px;position:relative;overflow:hidden}
.bar .t i{position:absolute;inset:0 auto 0 0;background:#1F4258;border-radius:4px}
.bar .t i.c{background:#F08A6C}.bar .t i.g{background:#5FC4B8}
.bar .t b{position:absolute;right:8px;top:3px;font-size:13px;color:var(--ink)}
.bars .cap{font-size:13px;color:var(--muted);margin:10px 0 0}
@media (max-width:560px){.bar{grid-template-columns:1fr;gap:3px}}
.big{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:12px;margin:24px 0}
.big div{background:var(--navy);color:#EEF2F8;border-radius:var(--r);padding:16px 18px}
.big b{display:block;font-size:30px;color:#D6B87F;line-height:1.1}
.big span{font-size:13.5px;color:#C9D3E3}
.use{background:linear-gradient(135deg,#14213D,#1F4258);color:#EEF2F8;border-radius:10px;padding:20px 22px;margin:32px 0}
.use h3{margin:0 0 10px;color:#F1DDB0}
.use li{font-size:15.5px;color:#EEF2F8}
.figsvg{margin:24px 0;background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:14px}
.figsvg svg{width:100%;height:auto;display:block}
.figsvg .cap{font-size:13px;color:var(--muted);margin:8px 4px 0}
/* Trang chủ mục: hai khối chuyên mục */
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.panels{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin:36px 0 30px}
@media (max-width:860px){.panels{grid-template-columns:1fr}}
.panel{background:var(--surface);border:1px solid var(--line);border-radius:12px;overflow:hidden;display:flex;flex-direction:column}
.strip{display:grid;grid-template-columns:2fr 1fr 1fr;height:190px;gap:2px;background:var(--line)}
.strip span{overflow:hidden;display:block;background:var(--navy)}
.strip img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .6s ease}
.panel:hover .strip img{transform:scale(1.04)}
.pb{padding:18px 22px 22px}
.ph{all:unset;cursor:pointer;display:grid;gap:2px}
.ph small{font-size:12px;letter-spacing:.08em;text-transform:uppercase;font-weight:700;color:var(--brass)}
.panel.tam-ly .ph small{color:#C2593F}
.ph strong{font-size:26px;line-height:1.2;letter-spacing:-.015em}
.ph:hover strong,.ph[aria-pressed="true"] strong{text-decoration:underline;text-decoration-color:var(--brass);text-underline-offset:5px}
.ph:focus-visible,.gh:focus-visible{outline:2px solid var(--brass);outline-offset:3px;border-radius:4px}
.pb > p{margin:6px 0 14px;color:var(--muted);font-size:15px;line-height:1.6}
.pg{border-top:1px solid var(--line);padding-top:12px;margin-top:12px}
.pg:first-of-type{margin-top:0}
.gh{all:unset;cursor:pointer;font-weight:700;font-size:15px;display:inline-block;margin-bottom:8px}
.gh small{font-weight:400;color:var(--muted);margin-left:4px}
.gh[aria-pressed="true"]{color:var(--brass)}
.pl{display:flex;flex-wrap:wrap;gap:8px}
.pl a{font-size:14px;text-decoration:none;border:1px solid var(--line);border-radius:99px;padding:6px 12px;background:var(--paper);color:var(--ink)}
.pl a:hover{border-color:var(--brass);color:var(--brass)}
.panel.tam-ly .pl a:hover{border-color:#F08A6C;color:#C2593F}
/* Ảnh bìa bài viết có chú thích nguồn */
.cover.photo{position:relative;margin:0 auto 8px}
.cover.photo img{opacity:1}
.cover.photo figcaption{position:absolute;right:0;bottom:0;max-width:100%;font-size:11.5px;line-height:1.4;color:#fff;background:rgba(8,16,32,.62);padding:5px 10px;border-top-left-radius:6px}
.cover.photo figcaption a{color:#F1DDB0}