/* ============================================================
   lib.css — HỆ THỐNG CSS DÙNG CHUNG cho thư viện giao diện (code thật).
   Mọi component trong library.html chỉ dùng class ở đây (không tự chế CSS).
   Palette đổi qua [data-palette] (mặc định casino tối). Mobile-first.
   v2 (2026-06): NÂNG VISUAL — gradient/shadow/glow/hover. KHÔNG đổi cấu trúc/class.
   ============================================================ */
:root{
  --bg:#0b0e16; --panel:#161b27; --panel2:#1e2536; --line:#2b3346;
  --ink:#eaeefb; --mut:#9aa5bf; --brand:#ffc83d; --brand2:#e0a92a; --on:#15110a;
  --heading:#fff; /* màu chữ heading chính (h1/h2 bài/tiêu đề box·card) — per-site override được */
  --ok:#34d399; --warn:#fbbf24; --rad:12px; --maxw:1200px;
  /* v2 tokens (mới — chỉ phục vụ visual) */
  --panel-grad:linear-gradient(160deg,#1b2233,#141925);
  --panel-grad2:linear-gradient(160deg,#222a3e,#171d2c);
  --line-soft:rgba(255,255,255,.06);
  --shadow:0 6px 18px -8px rgba(0,0,0,.55);
  --shadow-lg:0 16px 40px -14px rgba(0,0,0,.65);
  --glow:0 0 0 1px rgba(255,200,61,.35),0 8px 26px -8px rgba(255,200,61,.45);
  --brand-grad:linear-gradient(135deg,#ffd564,#e0a92a);
  --ease:.22s cubic-bezier(.4,.2,.2,1);
}
[data-palette="rikvip"]{--brand:#ff3d7f;--brand2:#c01f5b;--brand-grad:linear-gradient(135deg,#ff6fa3,#c01f5b);--glow:0 0 0 1px rgba(255,61,127,.35),0 8px 26px -8px rgba(255,61,127,.45)}
[data-palette="ocean"]{--brand:#39a0ff;--brand2:#1f6fd0;--brand-grad:linear-gradient(135deg,#6cbcff,#1f6fd0);--glow:0 0 0 1px rgba(57,160,255,.35),0 8px 26px -8px rgba(57,160,255,.45)}
[data-palette="forest"]{--brand:#46c66a;--brand2:#2c8f47;--brand-grad:linear-gradient(135deg,#6fe08e,#2c8f47);--glow:0 0 0 1px rgba(70,198,106,.35),0 8px 26px -8px rgba(70,198,106,.45)}
*{margin:0;padding:0;box-sizing:border-box}
.lib{font-family:-apple-system,Segoe UI,Roboto,Arial,sans-serif;font-size:16px;line-height:1.6;color:var(--ink);
  background:
    radial-gradient(900px 420px at 85% -120px,rgba(255,200,61,.07),transparent 60%),
    radial-gradient(700px 500px at -10% 0,rgba(57,120,255,.06),transparent 55%),
    var(--bg)}
.lib img{max-width:100%;height:auto;display:block}
.lib a{color:var(--brand);text-decoration:none;transition:color var(--ease)}
.lib a:hover{color:#ffdf86}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 16px}
.h1{font-size:clamp(24px,5vw,34px);line-height:1.2;margin:0 0 12px;letter-spacing:-.01em;color:var(--heading)}
.h2{font-size:clamp(20px,4vw,26px);margin:24px 0 12px;border-left:4px solid var(--brand);padding-left:12px;
  background:linear-gradient(90deg,rgba(255,200,61,.10),transparent 40%);border-radius:0 8px 8px 0;padding-top:4px;padding-bottom:4px}
.sapo{color:#cdd5ec;font-size:16px;margin:0 0 16px}
/* nút */
.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 22px;border-radius:10px;font-weight:700;font-size:15px;cursor:pointer;border:1.5px solid var(--line);color:var(--ink);background:rgba(255,255,255,.03);transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease),background var(--ease)}
/* hover nút OUTLINE (không phải btn-main): nền gold mờ + chữ gold — KHÔNG đè nền nút gold */
.btn:not(.btn-main):hover{transform:translateY(-2px);border-color:var(--brand);background:rgba(255,200,61,.12)}
.btn-main{background:var(--brand-grad);color:var(--on);border-color:transparent;box-shadow:0 6px 18px -6px rgba(255,200,61,.5)}
/* hover nút GOLD: GIỮ nền gold (rực hơn) + chữ đậm — tương phản tốt, không bị tối */
.btn-main:hover{background:linear-gradient(135deg,#ffe27a,#e0a92a);box-shadow:0 0 0 1px rgba(255,200,61,.55),0 12px 30px -8px rgba(255,200,61,.6);transform:translateY(-2px)}
/* nút là <a> -> phải đè màu link gold của .lib a (nếu không chữ trùng màu nền) */
.lib a.btn{color:var(--ink)}
.lib a.btn-main,.lib a.btn-main:hover{color:var(--on)}
.lib a.btn:not(.btn-main):hover{color:var(--brand)}
.btn-lg{padding:15px 30px;font-size:17px}
/* HEADER — số hàng (rows-1/2/3) × căn logo (a-left/a-center/a-right) × sticky */
.lh{background:var(--panel-grad2);border-bottom:1px solid var(--line);box-shadow:0 2px 0 rgba(0,0,0,.2)}
.lh.sticky{position:sticky;top:0;z-index:90;backdrop-filter:blur(10px);background:rgba(24,30,46,.85);box-shadow:var(--shadow)}
.lh-topbar{background:rgba(0,0,0,.25);color:var(--mut);font-size:13px;text-align:center;padding:6px 16px;border-bottom:1px solid var(--line-soft)}
.lh-main{display:flex;align-items:center;gap:16px;max-width:var(--maxw);margin:0 auto;padding:11px 16px}
.lh-main>nav,.lh-main>.lh-sp{flex:1}
.lh-nav{display:flex;gap:18px;flex-wrap:wrap;max-width:var(--maxw);margin:0 auto;padding:9px 16px;border-top:1px solid var(--line-soft)}
.lh .logo{font-weight:800;color:var(--brand);font-size:20px;white-space:nowrap;text-shadow:0 0 18px rgba(255,200,61,.4)}
.lh nav{display:flex;gap:18px;flex-wrap:wrap}
.lh nav a{color:var(--ink);font-weight:600;font-size:14.5px;position:relative;padding:2px 0;transition:color var(--ease)}
.lh nav a:hover{color:var(--brand)}
.lh nav a::after{content:"";position:absolute;left:0;right:100%;bottom:-3px;height:2px;background:var(--brand);transition:right var(--ease);border-radius:2px}
.lh nav a:hover::after{right:0}
.lh .cta{display:flex;gap:8px}
.lh .burger{display:none;font-size:24px;color:var(--brand);cursor:pointer}
/* căn logo */
.lh.a-right .lh-main .logo{order:3}
.lh.a-right .lh-main .cta{order:2}
.lh.a-right .lh-main>nav,.lh.a-right .lh-main>.lh-sp{order:1}
.lh.a-center .lh-main{justify-content:center}
.lh.a-center .lh-main .logo{order:1}
.lh.a-center .lh-main>nav,.lh.a-center .lh-main>.lh-sp{order:0;flex:1}
.lh.a-center .lh-main .cta{order:2;flex:1;justify-content:flex-end}
/* FOOTER */
.lf{background:linear-gradient(180deg,#1a2030,#10141e);border-top:1px solid var(--line);padding:36px 0 0;font-size:14px;color:var(--mut)}
.lf-cols{display:grid;gap:26px;max-width:var(--maxw);margin:0 auto;padding:0 16px}
.lf--1 .lf-cols{grid-template-columns:1fr;text-align:center;justify-items:center}
.lf--1 .lf-cols>div{display:flex;flex-direction:column;align-items:center}
.lf--1 .bio{margin-left:auto;margin-right:auto}
.lf--1 .lf-badges{justify-content:center}
.lf--2 .lf-cols{grid-template-columns:1fr 1fr}
.lf--3 .lf-cols{grid-template-columns:1fr 1fr 1fr}
.lf--4 .lf-cols{grid-template-columns:repeat(4,1fr)}
.lf h4{color:var(--brand);font-size:14px;margin-bottom:10px;text-transform:uppercase;letter-spacing:.5px}
.lf a{color:var(--mut);display:block;padding:2px 0;transition:color var(--ease)}
.lf a:hover{color:var(--brand)}
.lf .bio{color:var(--mut);font-size:13.5px;margin:6px 0 10px;max-width:340px}
.lf-badges{display:flex;gap:14px;padding:6px 0;flex-wrap:wrap;align-items:center}
.lf-bottom{border-top:1px solid var(--line-soft);text-align:center;padding:14px;font-size:13px;margin-top:18px;color:var(--mut)}
/* HERO */
.hero{background:
    radial-gradient(900px 360px at 80% -60px,rgba(255,200,61,.22),transparent 60%),
    radial-gradient(600px 300px at 0% 120%,rgba(57,120,255,.12),transparent 55%),
    var(--panel-grad2);
  border-bottom:1px solid var(--line);position:relative;overflow:hidden}
.hero::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent,rgba(0,0,0,.15));pointer-events:none}
.hero-in{padding:48px 16px;max-width:var(--maxw);margin:0 auto;position:relative;z-index:1}
.hero-split{display:grid;grid-template-columns:6fr 5fr;gap:30px;align-items:center}
.trust{display:flex;gap:14px;flex-wrap:wrap;font-size:13px;color:var(--mut);margin-top:14px}
.trust span{background:rgba(255,255,255,.04);border:1px solid var(--line-soft);padding:4px 12px;border-radius:20px}
.trust span::before{content:"✓ ";color:var(--brand);font-weight:800}
/* LAYOUT body */
.lay{display:grid;gap:26px;max-width:var(--maxw);margin:0 auto;padding:30px 16px;align-items:start}
.lay-363{grid-template-columns:3fr 6fr 3fr}
.lay-93{grid-template-columns:9fr 3fr}
.lay-mag{grid-template-columns:8fr 4fr}
.lay-v2{grid-template-columns:3fr 9fr}
.lay-center{max-width:760px}
.rail{position:sticky;top:80px;display:grid;gap:16px}
/* b7grid: layout 3-6-3 cho body big7 E (rail-main-rail), max 1200px */
.b7grid{display:grid;grid-template-columns:3fr 6fr 3fr;gap:20px;max-width:1200px;margin:0 auto;padding:24px 16px;align-items:start}
.b7grid .rail{position:sticky;align-self:start}
.box{background:var(--panel-grad);border:1px solid var(--line);border-radius:var(--rad);padding:16px;box-shadow:var(--shadow);transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease)}
.box:hover{border-color:rgba(255,200,61,.3);box-shadow:var(--shadow-lg)}
.box h3{font-size:14px;text-transform:uppercase;letter-spacing:.5px;color:var(--heading);border-bottom:1px solid var(--line);padding-bottom:8px;margin-bottom:10px}
/* grids + cards */
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.game-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:12px}
.card{background:var(--panel-grad);border:1px solid var(--line);border-radius:var(--rad);overflow:hidden;box-shadow:var(--shadow);transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease)}
.card:hover{transform:translateY(-4px);border-color:rgba(255,200,61,.35);box-shadow:var(--shadow-lg)}
.card img{transition:transform .4s ease}
.card:hover img{transform:scale(1.04)}
.card .pad{padding:12px}
.card .t{font-weight:700;color:var(--heading);font-size:14px}
.gcard{background:var(--panel-grad);border:1px solid var(--line);border-radius:10px;padding:10px;text-align:center;box-shadow:var(--shadow);transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease)}
.gcard:hover{transform:translateY(-4px) scale(1.02);border-color:rgba(255,200,61,.4);box-shadow:var(--glow)}
.gcard .nm{font-weight:700;font-size:13px;color:#fff;margin-top:6px}
/* marquee */
.marquee{display:flex;gap:12px;overflow-x:auto;padding-bottom:8px;scroll-snap-type:x mandatory}
.marquee>*{flex:0 0 auto;scroll-snap-align:start}
/* tabs — nhóm nội dung vào 1 khu vực (bấm nhãn hiện 1 pane). Cần JS nhỏ toggle .on. */
.tabs{display:flex;gap:6px;flex-wrap:wrap;margin:10px 0;overflow-x:auto;scrollbar-width:none}
.tabs::-webkit-scrollbar{display:none}
.tabs .tab{padding:8px 16px;border:1px solid var(--line);border-radius:8px;background:var(--panel-grad);cursor:pointer;font-weight:600;font-size:14px;transition:all var(--ease);white-space:nowrap;flex:0 0 auto}
.tabs .tab:hover{border-color:var(--brand);color:var(--brand)}
.tabs .tab.on{background:var(--brand-grad);color:var(--on);border-color:transparent;box-shadow:0 6px 16px -6px rgba(255,200,61,.5)}
.tabpane{display:none}
.tabpane.on{display:block;margin-top:14px;animation:tabfade .25s ease}
@keyframes tabfade{from{opacity:0;transform:translateY(4px)}to{opacity:1;transform:none}}
/* accordion — băm nội dung thành nhiều mảnh, mỗi mảnh 1 thanh mở/đóng. NATIVE <details>, KHÔNG cần JS. Hợp mobile. */
.acc{display:grid;gap:10px;margin:12px 0}
.acc details{background:var(--panel-grad);border:1px solid var(--line);border-radius:10px;overflow:hidden;transition:border-color var(--ease),box-shadow var(--ease)}
.acc details[open]{border-color:rgba(255,200,61,.35);box-shadow:var(--shadow)}
.acc summary{padding:14px 46px 14px 16px;cursor:pointer;font-weight:700;color:#fff;list-style:none;position:relative}
.acc summary::-webkit-details-marker{display:none}
.acc summary::after{content:"+";position:absolute;right:16px;top:12px;color:var(--brand);font-weight:800;font-size:22px;line-height:1}
.acc details[open] summary::after{content:"−"}
.acc .acc-body{padding:0 16px 14px;color:#dce3f5}
.acc .acc-body p{margin:0 0 10px}
.acc .acc-body img{border-radius:10px;margin:8px 0}
/* subcards — lưới thẻ con trong 1 section (khi không dùng tab/accordion) */
.subcards{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin:12px 0}
.subcards .box{background:var(--panel-grad);border:1px solid var(--line);border-radius:12px;padding:16px}
.subcards .box h3{margin-top:0;color:var(--brand);font-size:16px}
/* table: top nhà cái + kèo */
.tbl{width:100%;border-collapse:collapse;background:var(--panel-grad);border:1px solid var(--line);border-radius:var(--rad);overflow:hidden;box-shadow:var(--shadow)}
.tbl th,.tbl td{padding:12px 14px;border-bottom:1px solid var(--line-soft);text-align:left;font-size:14px}
.tbl tr:last-child td{border-bottom:0}
.tbl tbody tr{transition:background var(--ease)}
.tbl tbody tr:hover{background:rgba(255,200,61,.05)}
.tbl th{background:var(--panel2);color:var(--brand);font-size:12.5px;text-transform:uppercase;letter-spacing:.4px}
.tbl .rank{font-weight:800;color:var(--brand)}
.tbl .star{color:var(--brand)}
/* steps / faq / toc / author / related */
.steps{counter-reset:s;list-style:none;display:grid;gap:10px}
.steps li{counter-increment:s;position:relative;padding:12px 14px 12px 48px;background:var(--panel-grad);border:1px solid var(--line);border-radius:10px;box-shadow:var(--shadow)}
.steps li::before{content:counter(s);position:absolute;left:12px;top:12px;width:26px;height:26px;background:var(--brand-grad);color:var(--on);border-radius:50%;display:grid;place-items:center;font-weight:800;box-shadow:0 4px 12px -4px rgba(255,200,61,.6)}
.faq details{background:var(--panel-grad);border:1px solid var(--line);border-radius:10px;margin-bottom:8px;transition:border-color var(--ease)}
.faq details[open]{border-color:rgba(255,200,61,.3)}
.faq summary{padding:13px 16px;cursor:pointer;font-weight:700;color:#fff;list-style:none}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";float:right;color:var(--brand);font-weight:800}
.faq details[open] summary::after{content:"−"}
.faq .a{padding:0 16px 14px;color:#cdd5ec}
.toc{background:var(--panel-grad);border:1px solid var(--line);border-radius:var(--rad);padding:14px;box-shadow:var(--shadow)}
.toc a{display:block;color:#cdd5ec;padding:4px 0;font-size:14px}
.author{display:flex;gap:14px;background:var(--panel-grad);border:1px solid var(--line);border-left:4px solid var(--brand);border-radius:var(--rad);padding:14px;margin:16px 0;box-shadow:var(--shadow)}
.author img{width:64px;height:64px;border-radius:50%;flex:none}
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.breadcrumb{font-size:13px;color:var(--mut);margin-bottom:8px}
.read p{margin:0 0 12px;color:#dce3f5}
.read h2{font-size:22px;margin:22px 0 10px;color:var(--heading)}
.read h3{font-size:18px;margin:16px 0 8px;color:var(--brand)}
.read img{border-radius:var(--rad);box-shadow:var(--shadow)}
.cta-block{background:
    radial-gradient(400px 120px at 50% -20px,rgba(255,200,61,.15),transparent),var(--panel-grad2);
  border:1px solid rgba(255,200,61,.25);border-radius:var(--rad);padding:22px 18px;text-align:center;margin:18px 0;box-shadow:var(--shadow)}
.archive-list{display:grid;gap:12px}
/* archive — kiểu liệt kê bài */
.arc-masonry{column-count:3;column-gap:16px}
.arc-masonry>.card{break-inside:avoid;margin-bottom:16px;display:inline-block;width:100%}
.arc-rows{display:grid;gap:14px}
.arc-row{display:grid;grid-template-columns:220px 1fr;background:var(--panel-grad);border:1px solid var(--line);border-radius:var(--rad);overflow:hidden;box-shadow:var(--shadow);transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease)}
.arc-row:hover{transform:translateY(-3px);border-color:rgba(255,200,61,.3);box-shadow:var(--shadow-lg)}
.arc-row .thumb{aspect-ratio:16/10;background:var(--panel2)}
.arc-row .pad{padding:12px 16px}
@media(max-width:900px){.arc-masonry{column-count:2}}
@media(max-width:640px){.arc-masonry{column-count:1}.arc-row{grid-template-columns:1fr}}
.pager{display:flex;gap:8px;justify-content:center;margin:18px 0}
.pager a{padding:8px 13px;border:1px solid var(--line);border-radius:8px;color:var(--ink);transition:all var(--ease)}
.pager a:hover{border-color:var(--brand);color:var(--brand);background:rgba(255,200,61,.06)}
.filter{display:flex;gap:8px;flex-wrap:wrap;margin:10px 0}
.filter .chip{padding:6px 13px;border:1px solid var(--line);border-radius:20px;font-size:13px;cursor:pointer;background:var(--panel-grad);transition:all var(--ease)}
.filter .chip:hover{border-color:var(--brand);color:var(--brand)}
/* sticky mobile + drawer */
.sticky-cta{display:none}
.drawer{display:none;position:fixed;top:0;left:0;right:0;bottom:0;z-index:300;background:var(--panel);overflow-y:auto;box-shadow:4px 0 24px rgba(0,0,0,.5)}
@media(max-width:1024px){.lay-363,.lay-93,.lay-mag,.lay-v2{grid-template-columns:1fr}.lay{width:100%;max-width:100%!important}.lay>*{min-width:0;width:100%;max-width:100%;overflow-x:hidden}.rail{position:static}.hero-split{grid-template-columns:1fr}.b7grid{grid-template-columns:1fr}.b7grid .rail{position:static}}
@media(max-width:900px){.game-grid{grid-template-columns:repeat(3,1fr)}.grid-4{grid-template-columns:repeat(2,1fr)}.subcards{grid-template-columns:repeat(2,1fr)}.related-grid{grid-template-columns:1fr}.lf--3 .lf-cols,.lf--4 .lf-cols{grid-template-columns:repeat(2,1fr)}}
@media(max-width:640px){
  .lh nav,.lh .cta{display:none}
  .lh .burger{display:block;min-width:44px;min-height:44px;display:flex;align-items:center;justify-content:center}
  /* mobile: luôn logo TRÁI · ☰ PHẢI (override a-center/a-right để khỏi đẩy logo lệch) */
  .lh .lh-main,.lh.a-center .lh-main,.lh.a-right .lh-main{justify-content:space-between}
  .lh .lh-main>.lh-sp{display:none}
  .lh .lh-main .logo,.lh.a-center .lh-main .logo,.lh.a-right .lh-main .logo{order:0;flex:0 0 auto}
  .lh .lh-main .burger{order:9}
  /* logo image: giảm size ở mobile để header gọn, tap target burger ≥44px */
  .lh .lh-main .logo img{max-height:40px;width:auto}
  .game-grid,.grid-3,.grid-2{grid-template-columns:repeat(2,1fr)}
  .subcards{grid-template-columns:1fr}   /* mảnh nội dung về 1 cột — hết chật/tràn trên mobile */
  .lf--2 .lf-cols,.lf--3 .lf-cols,.lf--4 .lf-cols{grid-template-columns:1fr;text-align:center;justify-items:center}
  .sticky-cta{display:flex;position:fixed;left:0;right:0;bottom:0;z-index:200;gap:8px;padding:9px 12px;background:rgba(20,24,34,.97);border-top:1px solid var(--line);box-shadow:0 -8px 24px -10px rgba(0,0,0,.7)}
  .sticky-cta .btn{flex:1;justify-content:center;padding:12px}
  body{padding-bottom:62px;overflow-x:hidden}
  html{overflow-x:hidden;scrollbar-width:none}
  html::-webkit-scrollbar{display:none}
  /* chặn text dài tràn viewport ở mobile */
  .h1,.h2,.read h2,.read h3,p,li,td,th{word-break:break-word;overflow-wrap:break-word}
  /* ảnh không tràn container */
  img{max-width:100%!important;height:auto}
  /* section overflow-x clip */
  section{overflow-x:clip}
}