/* ========================================================================= Archit Bhatnagar — personal site Custom design system. Light + dark. No framework. ========================================================================= */ /* ---- Fonts (Google Fonts, loaded in ) --------------------------- */ /* Inter (sans) for everything — clean and neutral */ /* ---- Design tokens ---------------------------------------------------- */ :root { /* Neutral ink scale (light mode default) */ --bg: #fbfbfa; --bg-elev: #ffffff; --bg-subtle: #f4f4f2; --text: #17181c; --text-muted: #55565d; --text-faint: #8b8d96; --border: #e6e5e1; --border-strong: #d6d5cf; /* Accents */ --accent: #3a56d4; /* refined cobalt/indigo */ --accent-soft: rgba(58, 86, 212, 0.10); --accent-line: rgba(58, 86, 212, 0.30); --warm: #b45309; /* amber — reserved for Best Paper / highlights */ --warm-soft: rgba(180, 83, 9, 0.10); /* Grid motif line color */ --grid-line: rgba(23, 24, 28, 0.045); /* Typography — serif for content (LaTeX-like), sans reserved for UI chrome */ --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; --font-serif: Georgia, "Iowan Old Style", "Palatino Linotype", "Book Antiqua", "Times New Roman", serif; /* Rhythm */ --maxw: 1060px; --radius: 10px; --radius-sm: 6px; --shadow: 0 1px 2px rgba(16, 18, 27, 0.04), 0 8px 24px rgba(16, 18, 27, 0.05); --shadow-hover: 0 2px 6px rgba(16, 18, 27, 0.06), 0 14px 40px rgba(16, 18, 27, 0.09); color-scheme: light; } /* Dark mode — applied for system-dark (unless user forced light) and for forced dark */ @media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) { --bg: #0d0e12; --bg-elev: #14151a; --bg-subtle: #191b21; --text: #eceef2; --text-muted: #a2a6b0; --text-faint: #6a6e79; --border: #24262e; --border-strong: #333642; --accent: #8ea2ff; --accent-soft: rgba(142, 162, 255, 0.12); --accent-line: rgba(142, 162, 255, 0.34); --warm: #f5b455; --warm-soft: rgba(245, 180, 85, 0.12); --grid-line: rgba(255, 255, 255, 0.04); --shadow: 0 1px 2px rgba(0, 0, 0, 0.4), 0 10px 30px rgba(0, 0, 0, 0.35); --shadow-hover: 0 2px 6px rgba(0, 0, 0, 0.45), 0 18px 44px rgba(0, 0, 0, 0.5); color-scheme: dark; } } :root[data-theme="dark"] { --bg: #0d0e12; --bg-elev: #14151a; --bg-subtle: #191b21; --text: #eceef2; --text-muted: #a2a6b0; --text-faint: #6a6e79; --border: #24262e; --border-strong: #333642; --accent: #8ea2ff; --accent-soft: rgba(142, 162, 255, 0.12); --accent-line: rgba(142, 162, 255, 0.34); --warm: #f5b455; --warm-soft: rgba(245, 180, 85, 0.12); --grid-line: rgba(255, 255, 255, 0.04); --shadow: 0 1px 2px rgba(0, 0, 0, 0.4), 0 10px 30px rgba(0, 0, 0, 0.35); --shadow-hover: 0 2px 6px rgba(0, 0, 0, 0.45), 0 18px 44px rgba(0, 0, 0, 0.5); color-scheme: dark; } /* ---- Reset / base ----------------------------------------------------- */ *, *::before, *::after { box-sizing: border-box; } * { margin: 0; } html { font-size: 18px; scroll-behavior: smooth; -webkit-text-size-adjust: 100%; } @media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } * { animation: none !important; transition: none !important; } } body { background: var(--bg); color: var(--text); font-family: var(--font-sans); font-size: 1rem; line-height: 1.62; -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility; font-feature-settings: "cv05" 1, "ss01" 1; transition: background-color .35s ease, color .35s ease; overflow-x: hidden; } a { color: var(--accent); text-decoration: none; } a:hover { text-decoration: underline; text-underline-offset: 2px; } /* Refined thin scrollbar */ html { scrollbar-width: thin; scrollbar-color: var(--border-strong) transparent; } ::-webkit-scrollbar { width: 10px; height: 10px; } ::-webkit-scrollbar-track { background: transparent; } ::-webkit-scrollbar-thumb { background: var(--border-strong); border-radius: 8px; border: 3px solid var(--bg); } ::-webkit-scrollbar-thumb:hover { background: var(--text-faint); } /* Scroll progress hairline along the very top edge */ .scroll-progress { position: fixed; top: 0; left: 0; z-index: 60; height: 2px; width: 0; background: var(--accent); opacity: 0.65; pointer-events: none; } /* Content links: smooth slide-in underline instead of the default snap */ .hero-bio a, .news-body a, .tl-body a, .edu-item a, .contact-grid a { background-image: linear-gradient(currentColor, currentColor); background-size: 0% 1px; background-repeat: no-repeat; background-position: 0 100%; transition: background-size .28s ease; padding-bottom: 1px; } .hero-bio a:hover, .news-body a:hover, .tl-body a:hover, .edu-item a:hover, .contact-grid a:hover { text-decoration: none; background-size: 100% 1px; } img { max-width: 100%; display: block; } h1, h2, h3, h4 { line-height: 1.2; font-weight: 700; letter-spacing: -0.02em; } ::selection { background: var(--accent-soft); color: var(--text); } :focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 3px; } .container { max-width: var(--maxw); margin: 0 auto; padding: 0 22px; } /* ---- Navbar ----------------------------------------------------------- */ .nav { position: sticky; top: 0; z-index: 50; backdrop-filter: saturate(1.4) blur(12px); -webkit-backdrop-filter: saturate(1.4) blur(12px); background: color-mix(in srgb, var(--bg) 82%, transparent); border-bottom: 1px solid transparent; transition: border-color .3s ease, background .3s ease; } .nav.scrolled { border-bottom-color: var(--border); } .nav-inner { max-width: var(--maxw); margin: 0 auto; padding: 0 22px; height: 60px; display: flex; align-items: center; justify-content: space-between; } .nav-brand { font-family: var(--font-sans); font-weight: 700; font-size: 1.02rem; letter-spacing: -0.02em; color: var(--text); display: inline-flex; align-items: center; } .nav-brand:hover { text-decoration: none; } .nav-links { display: flex; align-items: center; gap: 4px; } .nav-links a { font-family: var(--font-sans); position: relative; color: var(--text-muted); font-size: 0.88rem; font-weight: 500; padding: 7px 11px; border-radius: var(--radius-sm); transition: color .2s ease, background .2s ease; } .nav-links a::after { content: ""; position: absolute; left: 11px; right: 11px; bottom: 3px; height: 2px; border-radius: 2px; background: var(--accent); transform: scaleX(0); transform-origin: left; transition: transform .25s ease; } .nav-links a:hover { color: var(--text); background: var(--bg-subtle); text-decoration: none; } .nav-links a.active { color: var(--text); } .nav-links a.active::after { transform: scaleX(1); } .theme-toggle { display: inline-grid; place-items: center; width: 36px; height: 36px; margin-left: 6px; border: 1px solid var(--border); border-radius: var(--radius-sm); background: var(--bg-elev); color: var(--text-muted); cursor: pointer; transition: color .2s ease, border-color .2s ease, transform .2s ease; } .theme-toggle:hover { color: var(--accent); border-color: var(--border-strong); } .theme-toggle:active { transform: scale(0.94); } .theme-toggle .fa-sun { display: none; } :root[data-theme="dark"] .theme-toggle .fa-sun { display: block; } :root[data-theme="dark"] .theme-toggle .fa-moon { display: none; } @media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .theme-toggle .fa-sun { display: block; } :root:not([data-theme="light"]) .theme-toggle .fa-moon { display: none; } } .nav-toggle { display: none; } /* ---- Section scaffolding --------------------------------------------- */ section { scroll-margin-top: 76px; } .section { max-width: var(--maxw); margin: 0 auto; padding: 52px 22px; border-top: 1px solid var(--border); } .section-head { display: flex; align-items: baseline; gap: 15px; margin-bottom: 22px; } .section-index { font-family: var(--font-sans); font-size: 0.82rem; font-weight: 600; letter-spacing: 0.02em; color: var(--accent); flex: none; } .section-title { font-size: 1.5rem; letter-spacing: -0.03em; flex: none; } .section-rule { flex: 1 1 auto; height: 1px; background: var(--border); align-self: center; margin-top: 5px; } .section-note { color: var(--text-faint); font-size: 0.85rem; margin: -12px 0 22px; } /* ---- Hero ------------------------------------------------------------- */ .hero { position: relative; overflow: hidden; padding: 66px 0 30px; } .hero-net { position: absolute; inset: 0; z-index: 0; pointer-events: none; /* Soft-fade the inner edge of each side band, plus a gentle top/bottom fade. */ -webkit-mask-image: linear-gradient(to right, #000 0%, #000 11%, transparent 19%, transparent 81%, #000 89%, #000 100%), linear-gradient(to bottom, transparent 0%, #000 14%, #000 86%, transparent 100%); mask-image: linear-gradient(to right, #000 0%, #000 11%, transparent 19%, transparent 81%, #000 89%, #000 100%), linear-gradient(to bottom, transparent 0%, #000 14%, #000 86%, transparent 100%); -webkit-mask-composite: source-in; mask-composite: intersect; } .hero .container { position: relative; z-index: 1; } .hero-grid { display: grid; grid-template-columns: 1fr 300px; gap: 52px; align-items: start; } .hero h1 { font-size: clamp(34px, 4.8vw, 46px); /* pinned in px — not scaled by root */ letter-spacing: -0.045em; line-height: 1.02; margin-bottom: 22px; } .hero-role { font-size: 1.12rem; color: var(--text-muted); font-weight: 500; margin-bottom: 22px; } .hero-role a { color: var(--text); font-weight: 600; } .hero-bio { font-size: 1.02rem; color: var(--text-muted); max-width: 62ch; } .hero-bio p { margin-bottom: 14px; } .hero-bio a { font-weight: 500; } .hero-bio strong { color: var(--text); font-weight: 600; } .hero-cta { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 26px; } /* Portrait card */ .portrait { position: relative; } .portrait-img { width: 100%; aspect-ratio: 1; object-fit: cover; border-radius: 14px; border: 1px solid var(--border); box-shadow: var(--shadow); } .portrait::after { content: ""; position: absolute; inset: -1px; border-radius: 15px; pointer-events: none; background: linear-gradient(160deg, var(--accent-line), transparent 45%); opacity: 0.5; mix-blend-mode: normal; -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0); } .socials { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 16px; justify-content: center; } .socials a { display: inline-grid; place-items: center; width: 38px; height: 38px; border: 1px solid var(--border); border-radius: var(--radius-sm); color: var(--text-muted); background: var(--bg-elev); font-size: 1rem; transition: color .2s, border-color .2s, transform .2s, background .2s; } .socials a:hover { color: var(--accent); border-color: var(--accent-line); transform: translateY(-2px); text-decoration: none; background: var(--accent-soft); } /* ---- Buttons ---------------------------------------------------------- */ .btn { display: inline-flex; align-items: center; gap: 8px; font-size: 0.9rem; font-weight: 500; font-family: var(--font-sans); padding: 9px 16px; border-radius: var(--radius-sm); border: 1px solid var(--border-strong); background: var(--bg-elev); color: var(--text); cursor: pointer; transition: all .2s ease; } .btn:hover { border-color: var(--accent-line); color: var(--accent); text-decoration: none; transform: translateY(-1px); box-shadow: var(--shadow); } .btn-primary { background: var(--accent); border-color: var(--accent); color: #fff; } :root[data-theme="dark"] .btn-primary { color: #0d0e12; } @media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .btn-primary { color: #0d0e12; } } .btn-primary:hover { color: #fff; filter: brightness(1.06); } :root[data-theme="dark"] .btn-primary:hover { color: #0d0e12; } @media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .btn-primary:hover { color: #0d0e12; } } .btn-sm { font-size: 0.8rem; padding: 5px 11px; gap: 6px; } /* ---- News ------------------------------------------------------------- */ .news-block { max-width: var(--maxw); margin: 0 auto; padding: 4px 22px 8px; } .news { margin-top: 0; } .news-head { display: flex; align-items: baseline; gap: 10px; margin-bottom: 12px; } .news-list { list-style: none; padding: 0; } .news-list li { display: grid; grid-template-columns: 92px 1fr; gap: 14px; padding: 10px 0; border-bottom: 1px solid var(--border); font-size: 0.95rem; } .news-list li:last-of-type { border-bottom: none; } .news-list li.hidden-news { display: none; } .news-list li.hidden-news.show { display: grid; } .news-date { font-family: var(--font-sans); font-size: 0.76rem; color: var(--text-faint); padding-top: 2px; white-space: nowrap; } .news-body { color: var(--text); } .news-body .tag { color: var(--accent); font-weight: 600; } .news-more { margin-top: 12px; font-family: var(--font-sans); font-size: 0.78rem; color: var(--accent); background: none; border: none; cursor: pointer; padding: 0; } .news-more:hover { text-decoration: underline; } /* ---- Publications ----------------------------------------------------- */ .pub-list { display: flex; flex-direction: column; } .pub { position: relative; display: grid; grid-template-columns: 58px 1fr; gap: 18px; padding: 18px 0; border-bottom: 1px solid var(--border); } .pub::before { content: ""; position: absolute; left: -18px; top: 24px; bottom: 24px; width: 2px; border-radius: 2px; background: var(--accent); opacity: 0; transform: scaleY(0.5); transition: opacity .25s ease, transform .25s ease; } .pub:hover::before { opacity: 0.7; transform: scaleY(1); } .pub:first-child { padding-top: 0; } .pub:first-child::before { top: 6px; } .pub:last-child { border-bottom: none; } .pub-year { font-family: var(--font-sans); font-size: 0.8rem; color: var(--text-faint); padding-top: 2px; } .pub-title { font-size: 1.06rem; font-weight: 600; letter-spacing: -0.02em; line-height: 1.35; margin-bottom: 5px; text-wrap: balance; } .pub-title a { color: var(--text); transition: color .18s ease; } .pub-title a:hover { color: var(--accent); } .pub:hover .pub-title a { color: var(--accent); } .pub-authors { font-size: 0.9rem; color: var(--text-muted); margin-bottom: 9px; } .pub-authors .me { color: var(--text); font-weight: 600; } .pub-authors .me::after { content: ""; } .pub-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 16px; } .venue { display: inline-flex; align-items: center; gap: 7px; font-size: 0.8rem; font-weight: 600; letter-spacing: 0.01em; color: var(--accent); } .venue::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: currentColor; opacity: 0.8; flex: none; } .venue.warm { color: var(--warm); } .badge-award { display: inline-flex; align-items: center; gap: 6px; font-size: 0.8rem; font-weight: 600; color: var(--warm); } .badge-soft { font-size: 0.8rem; color: var(--text-faint); font-style: italic; } .pub-links { display: inline-flex; gap: 6px; } .pub-links a { font-family: var(--font-sans); font-size: 0.72rem; color: var(--text-muted); border: 1px solid var(--border); border-radius: 5px; padding: 3px 9px; display: inline-flex; align-items: center; gap: 5px; transition: all .18s ease; } .pub-links a:hover { color: var(--accent); border-color: var(--accent-line); background: var(--accent-soft); text-decoration: none; } /* ---- Experience timeline --------------------------------------------- */ .timeline { position: relative; } .tl-item { position: relative; display: grid; grid-template-columns: 52px 1fr; gap: 16px; padding-bottom: 26px; } .tl-item:last-child { padding-bottom: 0; } .tl-rail { position: relative; display: flex; justify-content: center; } .tl-logo { width: 46px; height: 46px; border-radius: 10px; background: #f7f7f5; border: 1px solid var(--border); display: grid; place-items: center; z-index: 1; overflow: hidden; padding: 7px; box-shadow: inset 0 0 0 1px rgba(255,255,255,0.6); } .tl-logo img { width: 100%; height: 100%; object-fit: contain; } .tl-item:not(:last-child) .tl-rail::after { content: ""; position: absolute; top: 52px; bottom: -26px; left: 50%; width: 1px; background: var(--border); transform: translateX(-0.5px); } .tl-body { padding-top: 2px; } .tl-role { font-size: 1.02rem; font-weight: 600; letter-spacing: -0.01em; } .tl-org { color: var(--text); font-weight: 500; } .tl-org .advisor { color: var(--text-muted); font-weight: 400; } .tl-metaline { font-family: var(--font-sans); font-size: 0.72rem; color: var(--text-faint); margin: 4px 0 9px; display: flex; flex-wrap: wrap; gap: 6px 12px; } .sep { width: 1px; height: 0.82em; background: var(--border-strong); display: inline-block; align-self: center; } .tl-desc { list-style: none; padding: 0; color: var(--text-muted); font-size: 0.94rem; } .tl-desc li { position: relative; padding-left: 16px; margin-bottom: 5px; } .tl-desc li::before { content: ""; position: absolute; left: 2px; top: 0.6em; width: 5px; height: 5px; border-radius: 50%; background: var(--accent); opacity: 0.55; } /* ---- Education / cards ------------------------------------------------ */ .edu-item { display: grid; grid-template-columns: 52px 1fr; gap: 16px; padding-bottom: 22px; } .edu-item:last-child { padding-bottom: 0; } .edu-logo { width: 46px; height: 46px; border-radius: 10px; background: #f7f7f5; border: 1px solid var(--border); display: grid; place-items: center; padding: 7px; overflow: hidden; box-shadow: inset 0 0 0 1px rgba(255,255,255,0.6); } .edu-logo img { width: 100%; height: 100%; object-fit: contain; } .edu-school { font-size: 1.02rem; font-weight: 600; } .edu-degree { color: var(--text-muted); font-size: 0.95rem; } .edu-metaline { font-family: var(--font-sans); font-size: 0.72rem; color: var(--text-faint); margin-top: 4px; display: flex; flex-wrap: wrap; gap: 6px 12px; } /* ---- Compact list blocks (service / honors / teaching) --------------- */ .stack { display: flex; flex-direction: column; gap: 18px; } .mini-head { font-family: var(--font-sans); font-size: 0.72rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--text-faint); margin-bottom: 10px; } .mini-list { list-style: none; padding: 0; } .mini-list li { display: grid; grid-template-columns: 58px 1fr; gap: 12px; padding: 7px 0; font-size: 0.92rem; border-bottom: 1px dashed var(--border); } .mini-list li:last-child { border-bottom: none; } .mini-list .yr { font-family: var(--font-sans); font-size: 0.76rem; color: var(--accent); padding-top: 1px; } .mini-list .what { color: var(--text-muted); } .mini-list .what strong { color: var(--text); font-weight: 600; } /* ---- Talks ------------------------------------------------------------ */ .talk-title { font-size: 1.06rem; font-weight: 600; letter-spacing: -0.02em; margin-bottom: 6px; } .talk-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 16px; font-size: 0.85rem; color: var(--text-faint); margin-bottom: 16px; } .video-frame { position: relative; aspect-ratio: 16 / 9; max-width: 720px; border-radius: var(--radius); overflow: hidden; border: 1px solid var(--border); background: var(--bg-subtle); box-shadow: var(--shadow); } .video-frame iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; } /* ---- Contact ---------------------------------------------------------- */ .contact-grid { display: flex; flex-direction: column; gap: 12px; } .contact-row { display: flex; align-items: center; gap: 13px; font-size: 0.92rem; } .contact-row .ico { width: 36px; height: 36px; display: grid; place-items: center; flex: none; border: 1px solid var(--border); border-radius: var(--radius-sm); color: var(--accent); background: var(--bg-elev); font-size: 0.88rem; } .contact-row .val { color: var(--text); } .contact-row .val a { font-weight: 500; } .contact-row .email-text { font-weight: 500; cursor: default; user-select: text; } .contact-note { color: var(--text-faint); font-size: 0.84rem; margin-top: 6px; } /* ---- Footer ----------------------------------------------------------- */ .footer { border-top: 1px solid var(--border); padding: 30px 0 46px; margin-top: 8px; } .footer-inner { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 12px; font-family: var(--font-sans); font-size: 0.74rem; color: var(--text-faint); } .footer-inner a { color: var(--text-muted); } .footer-net { color: var(--border-strong); display: block; flex: none; } .footer-net path { stroke: currentColor; fill: none; } .footer-net circle { fill: var(--accent); opacity: 0.6; } /* ---- Scroll reveal ---------------------------------------------------- */ .reveal { opacity: 0; transform: translateY(14px); transition: opacity .6s ease, transform .6s ease; } .reveal.in { opacity: 1; transform: none; } @media (prefers-reduced-motion: reduce) { .reveal { opacity: 1; transform: none; } } /* ---- Responsive ------------------------------------------------------- */ @media (max-width: 860px) { .section { padding: 38px 22px; } .hero-grid { grid-template-columns: 1fr; gap: 28px; } /* Photo first on small screens */ .hero-aside { order: -1; display: flex; flex-direction: column; align-items: center; } .portrait { max-width: 220px; width: 100%; } .hero { padding-top: 40px; } } @media (max-width: 620px) { body { font-size: 16px; } .nav-links { display: none; } .nav-links.open { display: flex; position: absolute; top: 60px; right: 12px; left: 12px; flex-direction: column; align-items: stretch; gap: 2px; background: var(--bg-elev); border: 1px solid var(--border); border-radius: var(--radius); padding: 8px; box-shadow: var(--shadow); } .nav-links.open a { padding: 10px 12px; } .nav-toggle { display: inline-grid; place-items: center; width: 36px; height: 36px; border: 1px solid var(--border); border-radius: var(--radius-sm); background: var(--bg-elev); color: var(--text); cursor: pointer; } .pub { grid-template-columns: 1fr; gap: 6px; } .pub-year { padding-top: 0; } .pub-links { margin-left: 0; } .news-list li { grid-template-columns: 78px 1fr; gap: 10px; } .tl-item { grid-template-columns: 40px 1fr; gap: 12px; } .tl-logo, .edu-logo { width: 40px; height: 40px; } .tl-item:not(:last-child) .tl-rail::after { top: 46px; } .edu-item { grid-template-columns: 40px 1fr; gap: 12px; } .mini-list li { grid-template-columns: 48px 1fr; } }