:root{color-scheme:light;--color-bg: #ffffff;--color-text: #1d1d1f;--color-muted: #6e6e73;--color-subtle: #86868b;--color-surface: #f5f5f7;--color-surface-deep: #ececef;--color-border: rgba(0, 0, 0, .08);--color-accent: #0066cc;--color-accent-hover: #004f9e;--color-dark-surface: #0b0b0c;--color-dark-tile: #252527;--color-dark-text: #f5f5f7;--color-dark-muted: #a1a1a6;--color-link-dark: #2997ff;--color-text-primary: var(--color-text);--color-text-secondary: var(--color-muted);--color-text-muted: var(--color-subtle);--color-surface-card: var(--color-surface);--color-cyan: var(--color-accent);--color-cyan-hover: var(--color-accent-hover);--color-emerald: var(--color-accent);--color-accent-glow-top: transparent;--color-accent-glow-bottom: transparent;--color-border-hover: rgba(0, 102, 204, .42);--font-sans: -apple-system, BlinkMacSystemFont, "SF Pro Text", "SF Pro Display", "Geist", "Segoe UI", sans-serif;--font-mono: ui-monospace, "SFMono-Regular", Menlo, Monaco, Consolas, monospace;--container-width: 90rem;--container-width-narrow: 61.25rem;--section-spacing: clamp(5.5rem, 10vw, 9rem);--radius-small: .5rem;--radius-medium: 1.125rem;--radius-large: 1.125rem;--radius-outer: 1.125rem;--radius-inner: .5rem;--radius-button: 999px;--motion-ease: cubic-bezier(.32, .72, 0, 1);--motion-micro-duration: .2s;--motion-page-duration: .22s;--motion-reveal-duration: .56s;--motion-hero-duration: .62s;--motion-media-duration: .65s;--motion-stagger: 60ms;--transition-fast: var(--motion-micro-duration) var(--motion-ease);--transition-default: var(--motion-reveal-duration) var(--motion-ease);--z-background: 0;--z-content: 10;--z-navigation: 50}@view-transition{navigation:auto}::view-transition-old(root),::view-transition-new(root){animation-duration:var(--motion-page-duration);animation-timing-function:var(--motion-ease)}*,*:before,*:after{box-sizing:border-box}html{background:var(--color-dark-surface);scroll-padding-top:4.5rem}body{margin:0;background:var(--color-dark-surface);color:var(--color-text);font-family:var(--font-sans);font-size:1.0625rem;line-height:1.55;letter-spacing:-.012em;-webkit-font-smoothing:antialiased}::selection{background:#0066cc2e;color:var(--color-text)}:where(a,button,input,select,textarea,summary):focus-visible{outline:2px solid var(--color-accent);outline-offset:4px}.skip-link{position:fixed;top:.75rem;left:.75rem;z-index:100;padding:.65rem 1rem;border-radius:var(--radius-small);background:var(--color-bg);color:var(--color-accent);font-weight:600;text-decoration:none;transform:translateY(-160%);transition:transform var(--transition-fast)}.skip-link:focus{transform:translateY(0)}.brand-nav-header.brand-nav-header{position:fixed;inset:0 0 auto;z-index:var(--z-navigation);width:100%;border-bottom:1px solid transparent;background:#0b0b0cc2;color:var(--color-dark-text);backdrop-filter:saturate(180%) blur(18px);-webkit-backdrop-filter:saturate(180%) blur(18px);transition:background-color var(--transition-fast),border-color var(--transition-fast)}.brand-nav-header.is-scrolled{border-color:#ffffff1a;background:#0b0b0ceb}.brand-nav-island.brand-nav-island{position:relative;display:flex;align-items:center;width:min(calc(100% - 3rem),var(--container-width));min-height:3.5rem;margin-inline:auto}.brand-nav-logo.brand-nav-logo{display:grid;place-items:center;min-width:2.75rem;min-height:2.75rem;color:var(--color-dark-text);font-size:1.05rem;font-weight:700;letter-spacing:-.055em;text-decoration:none;view-transition-name:site-logo}.brand-nav-links.brand-nav-links{display:flex;align-items:center;gap:clamp(1rem,2.4vw,2rem);margin:0 auto;padding:0 2rem;list-style:none}.brand-nav-links.brand-nav-links a,.brand-nav-destination.brand-nav-destination{color:#f5f5f7bd;font-size:.78rem;font-weight:500;text-decoration:none;transition:color var(--transition-fast)}.brand-nav-links.brand-nav-links a:hover,.brand-nav-links.brand-nav-links a.active,.brand-nav-destination.brand-nav-destination:hover{color:#fff}.brand-nav-actions.brand-nav-actions{display:flex;align-items:center;gap:.75rem}.brand-nav-destination.brand-nav-destination{display:inline-flex;align-items:center;gap:.35rem;min-height:2.75rem;color:var(--color-link-dark);font-weight:600;white-space:nowrap}.lang-switch-wrapper{display:inline-flex;align-items:center;-webkit-user-select:none;user-select:none}.no-js-language-links{display:inline-flex;align-items:center;gap:.75rem}.no-js-language-links a{display:inline-flex;align-items:center;min-height:2.75rem;color:var(--color-link-dark);font-size:.78rem;font-weight:600;text-decoration:none}.brand-language-switch.brand-language-switch{-webkit-appearance:none;-moz-appearance:none;appearance:none;position:relative;display:inline-grid;grid-template-columns:repeat(2,2rem);align-items:center;min-width:4.5rem;min-height:2.75rem;padding:0 .25rem;border:0;border-radius:0;background:transparent;color:inherit;cursor:pointer}.brand-language-switch:after{position:absolute;top:50%;left:50%;width:1px;height:.75rem;background:#fff3;content:"";transform:translate(-50%,-50%)}.brand-language-switch .lang-segmented-pill{position:relative;z-index:2;display:grid;place-items:center;min-width:2rem;color:#f5f5f77a;font-size:.72rem;font-weight:600;letter-spacing:.02em;transition:color var(--transition-fast)}.brand-language-switch .lang-segmented-slider{position:absolute;bottom:.35rem;left:.75rem;z-index:1;width:1rem;height:2px;border-radius:1px;background:var(--color-link-dark);transition:transform var(--transition-fast)}.brand-language-switch:hover .lang-segmented-pill{color:#f5f5f7c7}.lang-switch-wrapper[data-lang=en] .lang-segmented-slider{transform:translate(2rem)}.lang-switch-wrapper[data-lang=vi] .lang-vi,.lang-switch-wrapper[data-lang=en] .lang-en{color:#fff}.brand-nav-mobile-actions{display:none}.brand-nav-toggle.brand-nav-toggle{display:none;align-items:center;justify-content:center;width:2.75rem;height:2.75rem;padding:0;border:0;background:transparent;color:#fff;cursor:pointer}.hamburger-lines,.hamburger-lines:before,.hamburger-lines:after{display:block;width:1.2rem;height:1px;background:currentColor;content:"";transition:transform var(--transition-fast),opacity var(--transition-fast)}.hamburger-lines:before{transform:translateY(-5px)}.hamburger-lines:after{transform:translateY(4px)}[aria-expanded=true] .hamburger-lines{background:transparent}[aria-expanded=true] .hamburger-lines:before{transform:translateY(1px) rotate(45deg)}[aria-expanded=true] .hamburger-lines:after{transform:rotate(-45deg)}.brand-button{display:inline-flex;align-items:center;justify-content:center;gap:.7rem;min-height:3rem;padding:.7rem 1.35rem;border-radius:var(--radius-button);font-size:.94rem;font-weight:600;text-decoration:none;transition:color var(--transition-fast),background-color var(--transition-fast),transform var(--transition-fast)}.brand-button:hover span:last-child{transform:translate(.25rem)}.brand-button span:last-child{transition:transform var(--transition-fast)}.brand-button:active{transform:scale(.97)}.brand-reveal{opacity:1;transform:none}.motion-ready .brand-reveal{opacity:0;transform:translate3d(0,1rem,0);transition:opacity var(--transition-default),transform var(--transition-default)}.brand-reveal.is-visible{opacity:1;transform:none}@media(max-width:900px){.brand-nav-island.brand-nav-island{width:min(calc(100% - 2rem),var(--container-width));justify-content:space-between}.js .brand-nav-links.brand-nav-links{position:fixed;inset:0 0 0 auto;z-index:100;width:min(21rem,100vw);height:100dvh;margin:0;padding:5.5rem 1.5rem 2rem;flex-direction:column;align-items:stretch;gap:0;background:#0b0b0c;transform:translate(100%);visibility:hidden;transition:transform .42s var(--motion-ease),visibility .42s}.js .brand-nav-links.brand-nav-links.open{transform:translate(0);visibility:visible}.js .brand-nav-links.brand-nav-links>li>a{display:flex;align-items:center;min-height:3.5rem;border-bottom:1px solid rgba(255,255,255,.1);font-size:1rem}.js .brand-nav-actions.brand-nav-actions{display:none}.js .brand-nav-mobile-actions.brand-nav-mobile-actions{display:flex;width:100%;margin-top:1rem;padding-top:1rem;flex-direction:column;align-items:flex-start;gap:.75rem}.js .brand-nav-toggle.brand-nav-toggle{display:inline-flex;position:relative;z-index:110}body.nav-open{overflow:hidden}html:not(.js) .brand-nav-header{position:relative;background:var(--color-dark-surface)}html:not(.js) .brand-nav-island{flex-wrap:wrap;padding-block:.5rem}html:not(.js) .brand-nav-links{order:3;width:100%;padding:0;flex-wrap:wrap;gap:.25rem 1rem}html:not(.js) .brand-nav-links a{display:inline-flex;align-items:center;min-height:2.75rem}html:not(.js) .brand-nav-mobile-actions{display:none}html:not(.js) .brand-language-switch{display:none}}@media(prefers-reduced-motion:reduce){@view-transition{navigation:none}html{scroll-behavior:auto}*,*:before,*:after{animation-duration:.01ms!important;animation-iteration-count:1!important;scroll-behavior:auto!important;transition-duration:.01ms!important}.brand-reveal{opacity:1;transform:none}}