@font-face{font-family:Be Vietnam Pro;font-style:normal;font-display:swap;font-weight:400;src:url(/_astro/be-vietnam-pro-vietnamese-400-normal.CRcqvyg1.woff2)format("woff2"),url(/_astro/be-vietnam-pro-vietnamese-400-normal.BuGn0gnm.woff)format("woff")}@font-face{font-family:Be Vietnam Pro;font-style:normal;font-display:swap;font-weight:600;src:url(/_astro/be-vietnam-pro-vietnamese-600-normal.nyU-ZL2p.woff2)format("woff2"),url(/_astro/be-vietnam-pro-vietnamese-600-normal.DkpCIyan.woff)format("woff")}@font-face{font-family:Be Vietnam Pro;font-style:normal;font-display:swap;font-weight:400;src:url(/_astro/be-vietnam-pro-latin-400-normal.PpnXBOrz.woff2)format("woff2"),url(/_astro/be-vietnam-pro-latin-400-normal.bXgqVju9.woff)format("woff")}@font-face{font-family:Be Vietnam Pro;font-style:normal;font-display:swap;font-weight:600;src:url(/_astro/be-vietnam-pro-latin-600-normal.BZDkUTrt.woff2)format("woff2"),url(/_astro/be-vietnam-pro-latin-600-normal.5IO4e7bK.woff)format("woff")}@font-face{font-family:Be Vietnam Pro;font-style:normal;font-display:swap;font-weight:400;src:url(/_astro/be-vietnam-pro-latin-ext-400-normal.CiZNW1ec.woff2)format("woff2"),url(/_astro/be-vietnam-pro-latin-ext-400-normal.DYBYyMQr.woff)format("woff")}@font-face{font-family:Be Vietnam Pro;font-style:normal;font-display:swap;font-weight:600;src:url(/_astro/be-vietnam-pro-latin-ext-600-normal.BNd8euf0.woff2)format("woff2"),url(/_astro/be-vietnam-pro-latin-ext-600-normal.BeUwKxhG.woff)format("woff")}:root{color-scheme:light dark;--bg:#fff;--bg-muted:#f4f7fb;--text:#111827;--text-muted:#4b5563;--accent:#1565c0;--accent-hover:#0d47a1;--border:#e5e7eb;--space-1:.25rem;--space-2:.5rem;--space-3:.75rem;--space-4:1rem;--space-5:1.5rem;--space-6:2.5rem;--space-7:4rem;--measure:65ch;--page:min(72rem, calc(100% - 2.5rem));--font-serif:"Be Vietnam Pro", system-ui, sans-serif;--font-sans:"Be Vietnam Pro", system-ui, sans-serif;--step-0:1.125rem;--step-1:1.333rem;--step-2:1.777rem;--step-3:clamp(2.75rem, 4vw + 1rem, 3.75rem);--leading:1.7;--rule:4px}html[data-theme=dark]{color-scheme:dark;--bg:#0b1220;--bg-muted:#121a2a;--text:#e8eef6;--text-muted:#9aa8bc;--accent:#64b5f6;--accent-hover:#90caf9;--border:#243044}@media (prefers-color-scheme:dark){html[data-theme=system]{color-scheme:dark;--bg:#0b1220;--bg-muted:#121a2a;--text:#e8eef6;--text-muted:#9aa8bc;--accent:#64b5f6;--accent-hover:#90caf9;--border:#243044}}*,:before,:after{box-sizing:border-box}html{background-color:var(--bg)}body{min-height:100vh;color:var(--text);font-family:var(--font-sans);font-size:var(--step-0);line-height:var(--leading);background-color:#0000;margin:0}html[data-theme=dark] body,html[data-theme=system] body{letter-spacing:.01em}h1,h2,h3{font-family:var(--font-serif);text-wrap:balance;letter-spacing:0;font-weight:600;line-height:1.3}h1{font-size:var(--step-3);max-width:min(18ch,100%);margin:0 0 var(--space-4)}h2{font-size:var(--step-2);margin:var(--space-7) 0 var(--space-4);padding-bottom:var(--space-2);border-bottom:1px solid var(--border);overflow-wrap:break-word}h3{font-size:var(--step-1);margin:var(--space-5) 0 var(--space-2);overflow-wrap:break-word}p{margin:0 0 var(--space-4);max-width:min(var(--measure), 100%);overflow-wrap:break-word;text-wrap:pretty}a{color:var(--accent);text-underline-offset:.18em;text-decoration-thickness:1px}a:hover{color:var(--accent-hover)}:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.site-shell{width:var(--page);min-width:0;max-width:100%;margin-inline:auto}.docs-page{width:min(92rem,100% - 1.5rem);margin-inline:auto}.site-header{border-bottom:1px solid var(--border);background:0 0}.site-header-inner{width:var(--page);justify-content:space-between;align-items:center;gap:var(--space-3);padding-block:var(--space-4);flex-wrap:wrap;margin-inline:auto;display:flex}.site-footer{justify-content:center;align-items:center;gap:var(--space-4);padding-block:var(--space-4);border-bottom:0;border-top:1px solid var(--border);margin-top:var(--space-7);color:var(--text-muted);background:0 0;flex-wrap:wrap;font-size:.95rem;display:flex}.wordmark{font-family:var(--font-serif);color:var(--text);font-size:1.15rem;text-decoration:none}.nav{gap:var(--space-4);flex-wrap:wrap;margin:0;padding:0;list-style:none;display:flex}.nav a{align-items:center;gap:var(--space-2);color:var(--text);text-decoration:none;display:inline-flex}.nav a[aria-current=page]{color:var(--accent)}.icon{flex-shrink:0;display:block}.with-icon{align-items:center;gap:var(--space-2);display:inline-flex}.control-menu-item.with-icon{align-items:center;gap:var(--space-2);width:100%;display:flex}.org-mark{align-items:center;gap:var(--space-2);min-width:0;display:inline-flex}.org-mark-fallback{flex-shrink:0}.org-mark-logo{object-fit:contain;background:#fff;flex-shrink:0;width:auto;max-width:5.5rem;height:2rem;padding:.12rem}.org-mark-name{min-width:0}.visually-hidden{clip:rect(0, 0, 0, 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.nav-desktop{flex:auto;min-width:0}.nav-toggle{position:relative}.nav-panel{top:calc(100% + var(--space-2));z-index:6;min-width:12rem;padding:var(--space-3);background:var(--bg);border:1px solid var(--border);position:absolute;left:0}.nav-toggle .nav{gap:var(--space-2);flex-direction:column}.controls{align-items:center;gap:var(--space-2);margin-left:auto;display:flex}.control-trigger{border:1px solid var(--border);width:2.25rem;height:2.25rem;color:var(--text);cursor:pointer;background:0 0;justify-content:center;align-items:center;padding:0;list-style:none;display:inline-flex}.control-trigger::-webkit-details-marker{display:none}.control-dropdown,.nav-toggle{position:relative}.control-menu{top:calc(100% + var(--space-1));z-index:6;min-width:10rem;padding:var(--space-1);background:var(--bg);border:1px solid var(--border);position:absolute;right:0}.control-menu-item{align-items:center;gap:var(--space-2);width:100%;color:var(--text);font:inherit;text-align:left;cursor:pointer;white-space:nowrap;background:0 0;border:0;padding:.45rem .65rem;font-size:.9rem;text-decoration:none;display:flex}.control-menu-item .icon{flex-shrink:0}.control-menu-item:hover,.control-menu-item:focus-visible,.control-menu-item.is-selected,.control-menu-item[aria-checked=true]{color:var(--accent)}.theme-icon{display:none}html[data-theme=light] .theme-icon-light,html[data-theme=dark] .theme-icon-dark,html[data-theme=system] .theme-icon-system{display:block}@media (width<=720px){.site-header-inner{grid-template-columns:auto 1fr auto;align-items:center;display:grid}.nav-toggle{grid-area:1/1}.controls{grid-area:1/3}.nav-desktop{display:none}.nav-toggle{display:block}}@media (width>=721px){.nav-toggle,.nav-panel{display:none}}.hero{gap:var(--space-6);padding-block:var(--space-7);grid-template-columns:minmax(0,2.2fr) minmax(0,.8fr);display:grid}.hero>*{min-width:0;max-width:100%}.hero>div:first-child{border-left:var(--rule) solid var(--accent);padding-left:var(--space-4)}.hero .placeholder{border:2px solid color-mix(in srgb, var(--accent) 28%, var(--border));background:var(--bg-muted);aspect-ratio:1;border-radius:50%;justify-self:end;width:min(100%,15.5rem);padding:0;position:relative;overflow:hidden}.hero .placeholder img{object-fit:cover;object-position:center 18%;width:100%;height:100%;display:block;position:absolute;inset:0}.hero .placeholder-label{text-align:center;padding:var(--space-3);background:var(--bg-muted);place-items:center;margin:0;display:grid;position:absolute;inset:0}.hero .placeholder-label[hidden]{display:none}@media (width<=1120px){.hero{gap:var(--space-4);grid-template-columns:minmax(0,1fr)}.hero .placeholder{justify-self:start;max-width:14rem}}@media (width<=720px){:root{--page:min(72rem, calc(100% - 1.5rem))}.hero{padding-block:var(--space-5)}.hero .placeholder{max-width:11.5rem}}.section-heading{align-items:center;gap:var(--space-3);display:flex}.section-heading-icon{color:var(--accent);flex-shrink:0}h1.section-heading{max-width:none}.services-intro{padding-top:var(--space-5)}.muted{color:var(--text-muted)}.list-plain{margin:0;padding:0;list-style:none}.list-plain>li{padding-block:var(--space-4);border-top:1px solid var(--border)}.hero-links,.contact-links{align-items:center;gap:var(--space-4);flex-wrap:wrap;display:flex}.hero-summary{max-width:42rem;line-height:1.55}.section-lead{max-width:42rem;margin:0 0 var(--space-4);color:var(--text-muted)}.activity-embeds{gap:var(--space-4);margin-top:var(--space-4);max-width:100%;display:grid}.activity-embed{background:0 0;border:0;width:100%;max-width:100%;display:block}.hero-links{margin-top:var(--space-4)}.timeline-section .timeline>li{padding-block:var(--space-5)}.timeline-section .timeline h3{margin-block:.15em .2em}.timeline-section .timeline ul{margin-block:var(--space-3) 0}.experience-group-label{margin:0 0 var(--space-3);letter-spacing:.04em;text-transform:uppercase;color:var(--text-muted);font-size:.85rem;font-weight:600}.experience-previous{margin-top:var(--space-4);border-top:1px solid var(--border)}.experience-previous>summary{cursor:pointer;padding-block:var(--space-4);color:var(--text-muted);font-size:.9rem;font-weight:500;list-style:none}.experience-previous>summary::-webkit-details-marker{display:none}.experience-previous[open]>summary{padding-bottom:var(--space-2)}.edu-highlights{margin:var(--space-2) 0 var(--space-3);font-weight:500;line-height:1.5}.pub-table-wrap{-webkit-overflow-scrolling:touch;width:100%;overflow-x:auto}.pub-table{border-collapse:collapse;width:100%;font-size:.95rem}.pub-table th,.pub-table td{text-align:left;vertical-align:top;padding:var(--space-3) var(--space-3) var(--space-3) 0;border-bottom:1px solid var(--border)}.pub-table th{color:var(--text-muted);letter-spacing:.02em;font-size:.8rem;font-weight:500}.pub-table td:first-child{overflow-wrap:anywhere;word-break:break-word;min-width:16rem}.pub-table .pub-year,.pub-table th.pub-year{text-align:right;white-space:nowrap;width:4.5rem}.pub-table .pub-status,.pub-table th.pub-status{white-space:nowrap;width:8rem;color:var(--text-muted);padding-right:0}@media (width<=640px){.pub-table thead{clip:rect(0, 0, 0, 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.pub-table,.pub-table tbody,.pub-table tr,.pub-table td{width:100%;display:block}.pub-table tr{padding-block:var(--space-4);border-bottom:1px solid var(--border)}.pub-table td{border:0;padding:.15rem 0}.pub-table .pub-year,.pub-table .pub-status{text-align:left}}.status{letter-spacing:.08em;text-transform:uppercase;color:var(--accent);font-size:.75rem}.placeholder{min-width:0;max-width:100%;aspect-ratio:var(--ph-ratio,3 / 4);background:var(--bg-muted);border:1px dashed var(--border);color:var(--text-muted);text-align:center;padding:var(--space-3);place-items:center;font-size:.8rem;display:grid}.placeholder img{object-fit:cover;width:100%;height:100%}.cta-row{gap:var(--space-4);margin-top:var(--space-6);flex-wrap:wrap;display:flex}.cta-row>*{min-width:0;max-width:100%}.katex{color:inherit}html[data-locale=en] [data-i18n=vi],html[data-locale=vi] [data-i18n=en],[data-i18n][hidden]{display:none!important}.skip-link{left:var(--space-4);background:var(--bg);padding:var(--space-2) var(--space-3);z-index:2;position:absolute;top:-3rem}.skip-link:focus{top:var(--space-2)}.placeholder-label{margin:0}.ask-ai-dropdown .control-menu{min-width:11rem}.page-outline-ask{margin:0 0 var(--space-3)}.ask-ai{width:100%;position:relative}.ask-ai-trigger{align-items:center;gap:var(--space-2);border:1px solid var(--border);width:100%;color:var(--accent);font:inherit;cursor:pointer;background:0 0;padding:.45rem .65rem;font-size:.95rem;list-style:none;display:inline-flex}.ask-ai-trigger::-webkit-details-marker{display:none}.ask-ai[open] .ask-ai-trigger{border-color:color-mix(in srgb, var(--accent) 45%, var(--border))}.ask-ai-menu{margin-top:var(--space-1);padding:var(--space-1);border:1px solid var(--border);background:var(--bg)}.ask-ai-item{align-items:center;gap:var(--space-2);width:100%;color:var(--text);font:inherit;text-align:left;cursor:pointer;background:0 0;border:0;padding:.45rem .65rem;font-size:.9rem;text-decoration:none;display:flex}.ask-ai-item:hover,.ask-ai-item:focus-visible{color:var(--accent)}.translate-toolbar{z-index:5;background:var(--bg);border:1px solid var(--border);padding:var(--space-1);position:absolute}.translate-toolbar button{align-items:center;gap:var(--space-2);appearance:none;color:var(--accent);font:inherit;cursor:pointer;background:0 0;border:0;padding:.2rem .35rem;font-size:.9rem;display:inline-flex}.prose{max-width:var(--measure)}.prose :is(h1,h2,h3){font-family:var(--font-serif)}.prose pre{border:1px solid var(--border);padding:var(--space-4);background:var(--bg-muted);overflow-x:auto}.prose :not(pre)>code{font-family:ui-monospace,monospace;font-size:.92em}.module-block{margin-bottom:var(--space-6)}.section-rule{border-left:var(--rule) solid var(--accent);padding-left:var(--space-5)}html{background-color:var(--bg);background-image:radial-gradient(ellipse 65% 50% at 12% 0%, color-mix(in srgb, var(--accent) 10%, transparent), transparent 62%), radial-gradient(ellipse 50% 42% at 92% 8%, color-mix(in srgb, var(--accent) 7%, transparent), transparent 58%);background-repeat:no-repeat;background-size:160% 160%;animation:60s ease-in-out infinite ambient-shift}html[data-theme=dark]{background-image:radial-gradient(ellipse 65% 50% at 12% 0%, color-mix(in srgb, var(--accent) 7%, transparent), transparent 62%), radial-gradient(ellipse 50% 42% at 92% 8%, color-mix(in srgb, var(--accent) 5%, transparent), transparent 58%)}@media (prefers-color-scheme:dark){html[data-theme=system]{background-image:radial-gradient(ellipse 65% 50% at 12% 0%, color-mix(in srgb, var(--accent) 7%, transparent), transparent 62%), radial-gradient(ellipse 50% 42% at 92% 8%, color-mix(in srgb, var(--accent) 5%, transparent), transparent 58%)}}html[data-layout=about]{background-image:radial-gradient(ellipse 65% 50% at 12% 0%, color-mix(in srgb, var(--accent) 14%, transparent), transparent 62%), radial-gradient(ellipse 50% 42% at 92% 8%, color-mix(in srgb, var(--accent) 10%, transparent), transparent 58%)}html[data-theme=dark][data-layout=about]{background-image:radial-gradient(ellipse 65% 50% at 12% 0%, color-mix(in srgb, var(--accent) 10%, transparent), transparent 62%), radial-gradient(ellipse 50% 42% at 92% 8%, color-mix(in srgb, var(--accent) 7%, transparent), transparent 58%)}@media (prefers-color-scheme:dark){html[data-theme=system][data-layout=about]{background-image:radial-gradient(ellipse 65% 50% at 12% 0%, color-mix(in srgb, var(--accent) 10%, transparent), transparent 62%), radial-gradient(ellipse 50% 42% at 92% 8%, color-mix(in srgb, var(--accent) 7%, transparent), transparent 58%)}}@keyframes ambient-shift{0%,to{background-position:0 30%,100% 0}50%{background-position:55% 15%,25% 70%}}@media (prefers-reduced-motion:reduce){html{animation:none}}