:root{--ink:#0f172a;--muted:#475569;--green:#047857;--dark-green:#064e3b;--line:#e2e8f0;--surface:#f8fafc;--radius:12px;color-scheme:light;font:16px/1.65 system-ui,-apple-system,"Segoe 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48px));margin-inline:auto}.narrow{width:min(760px,calc(100% - 40px));margin-inline:auto}.section{padding-block:64px}.small,small{font-size:.85rem}.muted{color:var(--muted)}.intro{font-size:1.125rem;color:var(--muted)}.eyebrow{font-size:.875rem;font-weight:650;color:var(--green);margin-bottom:16px}.skip{position:fixed;left:12px;top:-100px;z-index:100;background:white;border:2px solid var(--green);padding:12px}.skip:focus{top:12px}.site-header{border-bottom:1px solid var(--line);background:#fff;position:sticky;top:0;z-index:20}.header-inner{min-height:88px;display:flex;align-items:center;justify-content:space-between;gap:24px}.brand{display:flex;gap:12px;align-items:center;text-decoration:none;color:var(--ink);font-weight:800;letter-spacing:-.025em;font-size:18px;min-width:0}.brand svg{width:38px;height:38px;flex-shrink:0;color:var(--green)}.brand span{overflow-wrap:anywhere;min-width:0}.brand 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@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{animation:none!important;transition:none!important}}
@media print{.site-header,.site-footer,.article-cta,.step-check,.admin-sidebar,.skip,.button{display:none!important}.article,.download-guide{width:100%;max-width:none;margin:0;padding:0}.article-cover{max-height:260px}.article-step,li{break-inside:avoid}.notice{border:1px solid #999;background:none;color:#000}a{color:#000}}

/* Restore the owner's original dark hero and emerald visual identity. */
.visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.public-topbar{background:#0f172a;color:#cbd5e1;font-size:12px;padding:10px 0}.public-topbar .container{display:flex;justify-content:space-between;align-items:center;gap:16px}.public-topbar a{color:#6ee7b7;text-decoration:none;font-weight:650}
.public-page .container{width:min(1280px,calc(100% - 48px))}.public-page .header-inner{min-height:76px;gap:20px}.public-page .site-header .brand{font-size:19px;gap:10px;flex-shrink:0}.public-page .site-header .brand svg{color:white;background:#059669;padding:9px;width:42px;height:42px;border-radius:12px;box-shadow:0 3px 6px #05966924}.public-page .site-header .brand small{color:#047857;background:#ecfdf5;display:table;padding:0 5px;line-height:1.5;font-size:11px}.public-page .desktop-nav{gap:22px;font-size:13px;line-height:1.5}.public-page .desktop-nav a{max-width:130px}.public-page a.nav-safety{color:#e11d48}.public-page a.nav-ebook{color:#fff;background:#059669;border-radius:12px;padding:11px 15px;max-width:165px}
.original-hero{background:radial-gradient(ellipse at 0% 15%,#0b3a3d88,transparent 35%),radial-gradient(ellipse at 100% 90%,#155e754d,transparent 32%),linear-gradient(180deg,#0f172a 10%,#1e293b 100%);color:white;padding:66px 0 62px;text-align:center}.original-hero .hero-badge{display:table;max-width:100%;margin:0 auto 20px;padding:6px 23px;border:1px solid #10b98166;border-radius:30px;background:#064e3b66;color:#5eead4;font-size:14px;font-weight:700;line-height:1.6}.original-hero h1{font-size:clamp(2rem,3.6vw,3.1rem);line-height:1.06;letter-spacing:-.035em;max-width:1050px;margin:0 auto 20px;font-weight:800}.original-hero .hero-description{max-width:790px;margin:0 auto 32px;color:#dbe5f3;font-size:18px;line-height:1.65}.original-hero .hero-search{max-width:620px;margin:0 auto 20px}.original-hero .search-row{background:white;padding:7px;border-radius:16px;display:flex;flex-direction:row;align-items:center;gap:8px;box-shadow:0 8px 24px #0002}.original-hero .search-row input{border:0;margin:0;box-shadow:none;border-radius:8px;min-height:40px;padding:8px 0;font-size:15px}.original-hero .search-row input::placeholder{color:#64748b}.original-hero .search-row .button{background:#059669;border-color:#059669;min-height:40px;flex-shrink:0;align-self:center;padding:9px 20px;border-radius:12px}.search-symbol{font-size:28px;line-height:1;color:#64748b;margin:0 5px 0 10px}.hero-quick{display:flex;align-items:center;justify-content:center;gap:8px;flex-wrap:wrap;font-size:13px}.hero-quick>span{color:#a9bbd0;margin-right:4px;font-size:12px}.hero-quick a{display:inline-flex;align-items:center;min-height:36px;background:#1e293bcc;border:1px solid #47556988;color:#e2e8f0;padding:5px 13px;border-radius:30px;text-decoration:none}.hero-quick a:hover{border-color:#34d399;background:#064e3b}
.original-commitment{background:#022c22;padding:18px 0}.commitment-panel{display:flex;align-items:center;gap:16px;border:1px solid #05966966;background:#064e3b99;border-radius:16px;padding:18px 20px;color:#e2fdf5}.commitment-icon{background:#10b981;color:#022c22;font-size:26px;width:42px;height:42px;border-radius:12px;display:grid;place-items:center;flex-shrink:0}.commitment-panel>div{flex:1}.commitment-panel h2{color:#5eead4;font-size:13px;letter-spacing:0;margin:0 0 4px}.commitment-panel p{font-size:13px;line-height:1.6;margin:0}.commitment-panel>a{font-size:12px;font-weight:650;color:#a7f3d0;background:#ffffff0d;padding:8px 14px;border:1px solid #6ee7b744;border-radius:9px;text-decoration:none;flex-shrink:0}
.original-roadmap .eyebrow,.library-section .eyebrow{font-size:12px;letter-spacing:.07em;margin-bottom:10px}.original-roadmap h2,.library-section h2{font-size:clamp(1.5rem,2.8vw,2rem)}.roadmap-cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}.roadmap-cards article{border:1px solid #e2e8f0;border-radius:14px;padding:28px;background:white}.roadmap-number{display:grid;place-items:center;width:44px;height:44px;background:#d1fae5;color:#047857;font-weight:800;font-size:19px;border-radius:12px;margin-bottom:20px}.roadmap-cards article:nth-child(2) .roadmap-number{background:#dbeafe;color:#1d4ed8}.roadmap-cards article:nth-child(3) .roadmap-number{background:#f3e8ff;color:#7e22ce}.roadmap-cards h3{font-size:19px}.roadmap-cards p{font-size:14px;color:#475569}.roadmap-cards a{font-size:13px;font-weight:650;text-decoration:none}.library-section{background:#f8fafc;border-top:1px solid #e2e8f0}.public-page .filter{border-radius:30px}.public-page .filter.active{background:#059669;border-color:#059669}.public-page .resource-band{background:#ecfdf5}.public-page .guide-card{box-shadow:0 3px 10px #0f172a04}
@media(max-width:1180px){.public-page .desktop-nav{gap:14px}.public-page .site-header .brand{font-size:16px}.public-page .desktop-nav a{max-width:105px;font-size:12px}}
@media(max-width:1000px){.public-page .desktop-nav{display:none}.public-page .mobile-nav{display:block}.original-hero h1{font-size:40px}.original-hero .hero-description{font-size:17px}.commitment-panel{flex-wrap:wrap}.commitment-panel>a{margin-left:58px}.roadmap-cards{gap:16px}.roadmap-cards article{padding:22px}}
@media(max-width:650px){.public-page .container{width:calc(100% - 32px)}.public-topbar{padding:8px 0;font-size:10px}.public-topbar .container>span{max-width:190px}.public-page .site-header .brand{font-size:14px;gap:8px}.public-page .site-header .brand svg{width:34px;height:34px;padding:7px;border-radius:10px}.public-page .site-header .brand small{font-size:9px}.public-page .header-inner{min-height:70px;gap:10px}.public-page .mobile-nav summary{padding:8px;font-size:12px}.original-hero{padding:42px 0 40px}.original-hero .hero-badge{font-size:10px;padding:6px 12px;margin-bottom:20px}.original-hero h1{font-size:32px;line-height:1.15;letter-spacing:-.035em}.original-hero h1 br{display:none}.original-hero h1 span:before{content:' '}.original-hero .hero-description{font-size:15px;line-height:1.75;margin-bottom:24px}.original-hero .hero-search{margin-bottom:18px}.original-hero .search-row{gap:5px;padding:6px;border-radius:12px}.original-hero .search-row input{font-size:13px}.original-hero .search-row .button{font-size:12px;padding:9px 12px;border-radius:9px}.search-symbol{margin-left:4px;font-size:23px}.hero-quick{gap:7px;font-size:11px}.hero-quick>span{flex-basis:100%;font-size:11px}.hero-quick a{padding:5px 10px;min-height:36px}.original-commitment{padding:14px 0}.commitment-panel{padding:16px;gap:12px;align-items:flex-start}.commitment-icon{width:32px;height:32px;font-size:23px;border-radius:8px}.commitment-panel h2{font-size:11px;line-height:1.5}.commitment-panel p{font-size:12px}.commitment-panel>a{margin-left:44px;font-size:11px}.roadmap-cards{grid-template-columns:1fr}.original-roadmap .section-title>div p:last-child{font-size:14px}.original-roadmap .text-link{font-size:14px}.roadmap-cards article{padding:24px}.original-roadmap .section-title,.library-section .section-title{gap:16px}.public-page .mobile-nav a.nav-ebook{max-width:none}.public-page .mobile-nav nav{z-index:30}}

/* Public navigation: visible sections on tablets, a proper disclosure on phones. */
.public-page .site-header{box-shadow:0 2px 12px #0f172a06}
.public-page .header-inner{position:relative;flex-wrap:wrap;padding-block:14px;gap:12px 24px}
.public-page .desktop-nav{display:flex;gap:6px;flex:1;justify-content:flex-end}
.public-page .desktop-nav a{display:flex;align-items:center;justify-content:center;min-height:44px;max-width:none;padding:10px 12px;border-radius:9px;font-size:13px;line-height:1.4;text-align:center;transition:background .16s,color .16s}
.public-page .desktop-nav a:hover{background:#ecfdf5;color:#047857}
.public-page .desktop-nav a.nav-ebook{max-width:none;padding:10px 16px;white-space:nowrap;border-radius:9px;background:#047857}
.public-page .desktop-nav a.nav-ebook:hover{color:#fff;background:#065f46}
.public-page .mobile-nav{display:none}
@media(min-width:761px) and (max-width:1199px){
  .public-page .header-inner{gap:12px;justify-content:center;padding:16px 0 10px}
  .public-page .site-header .brand{font-size:19px}
  .public-page .desktop-nav{flex-basis:100%;justify-content:space-between;border-top:1px solid #e2e8f0;padding-top:8px;gap:4px}
  .public-page .desktop-nav a{font-size:12px;padding:8px;min-height:44px}
  .public-page .desktop-nav a.nav-ebook{padding:8px 12px}
  html{scroll-padding-top:155px}
}
@media(max-width:760px){
  .public-page .header-inner{flex-wrap:nowrap;justify-content:space-between;min-height:76px;padding-block:12px;gap:10px}
  .public-page .desktop-nav{display:none}
  .public-page .mobile-nav{display:block;position:static;font-size:13px;flex-shrink:0}
  .public-page .mobile-nav summary{display:flex;align-items:center;justify-content:center;gap:7px;min-height:44px;min-width:44px;padding:10px 11px;border:1px solid #d1e5dc;border-radius:10px;background:#f0fdf6;color:#065f46;list-style:none;font-size:12px;font-weight:650;cursor:pointer}
  .public-page .mobile-nav summary::-webkit-details-marker{display:none}
  .public-page .mobile-nav summary::marker{content:''}
  .public-page .mobile-nav summary svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;flex-shrink:0}
  .public-page .mobile-nav .menu-close{display:none}
  .public-page .mobile-nav[open] .menu-lines{display:none}
  .public-page .mobile-nav[open] .menu-close{display:block}
  .public-page .mobile-nav[open] summary{background:#d1fae5;border-color:#6ee7b7}
  .public-page .mobile-nav nav{position:absolute;left:0;right:0;top:calc(100% + 1px);width:auto;max-height:calc(100dvh - 95px);overflow-y:auto;margin:0;padding:12px;background:#fff;border:1px solid #dce8e2;border-radius:0 0 16px 16px;box-shadow:0 18px 35px #0f172a26;z-index:30}
  .public-page .mobile-nav nav a{display:flex;align-items:center;min-height:48px;margin:2px 0;padding:12px 14px;border-radius:9px;color:#334155;font-size:14px;font-weight:600;text-decoration:none}
  .public-page .mobile-nav nav a:hover{background:#ecfdf5;color:#047857}
  .public-page .mobile-nav nav a.nav-safety{color:#be123c}
  .public-page .mobile-nav nav a.nav-ebook{justify-content:center;background:#047857;color:#fff;margin-top:10px}
}
@media(max-width:380px){.public-page .mobile-nav summary{padding:10px 8px;gap:5px}.public-page .site-header .brand{font-size:13px}.public-page .site-header .brand small{font-size:8px}.public-page .site-header .brand svg{width:32px;height:32px}}

/* Floating Zalo Chat Widget */
.zalo-float{position:fixed;bottom:24px;right:24px;z-index:9999;transition:transform .2s ease,box-shadow .2s ease}
.zalo-float:hover{transform:translateY(-3px)}
@media(max-width:650px){
  .zalo-float{bottom:16px;right:16px}
  .zalo-float .zalo-label{display:none}
  .zalo-float a{padding:6px !important;border-radius:50% !important}
}


/* Article Rich Content: Figures, Callouts, Lists */
.article-figure { margin: 24px 0; text-align: center; }
.article-figure img { max-width: 100%; height: auto; border-radius: 12px; margin: 0 auto; border: 1px solid var(--line); box-shadow: 0 6px 20px rgba(15,23,42,0.06); }
.article-figure figcaption { font-size: 13px; color: var(--muted); margin-top: 10px; font-style: italic; }
.article-tip { background: #ecfdf5; border-left: 4px solid var(--green); padding: 16px 20px; border-radius: 10px; margin: 20px 0; border: 1px solid #a7f3d055; }
.article-tip .tip-badge { font-size: 12px; font-weight: 750; color: #065f46; display: inline-block; margin-bottom: 6px; text-transform: uppercase; }
.article-tip p { margin: 0; color: #064e3b; font-size: 14.5px; line-height: 1.7; }
.article-alert { background: #fffbeb; border-left: 4px solid #f59e0b; padding: 16px 20px; border-radius: 10px; margin: 20px 0; border: 1px solid #fde68a55; }
.article-alert .alert-badge { font-size: 12px; font-weight: 750; color: #b45309; display: inline-block; margin-bottom: 6px; text-transform: uppercase; }
.article-alert p { margin: 0; color: #78350f; font-size: 14.5px; line-height: 1.7; }
.article-step ul { padding-left: 24px; margin-bottom: 20px; }
.article-step li { margin-bottom: 8px; line-height: 1.75; color: #334155; }
.article-step strong { color: var(--ink); }