/* ============================================================ yilunzhang.com — pure CSS, zero frameworks Design notes: - CSS custom properties (variables) drive theming; the prefers-color-scheme media query swaps them for dark mode. - Layout uses CSS Grid for the timeline and Flexbox for the header. No classes from any framework. ============================================================ */ :root { --bg: #ffffff; --text: #1f2937; --muted: #6b7280; --faint: #9ca3af; --accent: #dc2626; /* medical red, from the CV — the "medicine" track */ --accent-soft: #fef2f2; --accent2: #2563eb; /* tech blue — the "building" track */ --accent2-soft: #eff6ff; --rule: #e5e7eb; --code-bg: #f3f4f6; color-scheme: light; } /* Dark mode is opt-in via the theme toggle (saved in localStorage and applied by an inline script in before paint). System prefers-color-scheme is intentionally NOT honored — default is light. */ :root[data-theme="dark"] { --bg: #0f1115; --text: #e5e7eb; --muted: #9ca3af; --faint: #6b7280; --accent: #ef4444; --accent-soft: #1d1416; --accent2: #60a5fa; --accent2-soft: #11161f; --rule: #23272f; --code-bg: #1a1d23; color-scheme: dark; } body { transition: background-color .15s ease, color .15s ease; } * { box-sizing: border-box; } html { scroll-behavior: smooth; } body { margin: 0; background: var(--bg); color: var(--text); font: 17px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; -webkit-font-smoothing: antialiased; } .container { max-width: 760px; margin: 0 auto; padding: 48px 24px 80px; } a { color: var(--accent); text-decoration: none; } a:hover { text-decoration: underline; } /* ---------- header ---------- */ header { display: flex; align-items: center; gap: 28px; } .avatar { width: 128px; height: 128px; border-radius: 50%; object-fit: cover; flex-shrink: 0; } h1 { margin: 0 0 4px; font-size: 2rem; letter-spacing: -0.5px; } .tagline { margin: 0 0 12px; color: var(--muted); font-size: 1.05rem; } .social { display: flex; gap: 14px; align-items: center; } .social a, .social button.theme-toggle { color: var(--faint); display: inline-flex; align-items: center; } .social a:hover, .social button.theme-toggle:hover { color: var(--accent); } .social svg { width: 22px; height: 22px; fill: currentColor; } /* Light/dark theme toggle. Same shape as the social icons so it sits naturally in the row (or in the blog-page top bar). The sun icon is only revealed when dark mode is active; the moon is the default. */ .theme-toggle { background: none; border: 0; padding: 0; margin: 0; cursor: pointer; font: inherit; } .theme-toggle .icon-sun { display: none; } :root[data-theme="dark"] .theme-toggle .icon-moon { display: none; } :root[data-theme="dark"] .theme-toggle .icon-sun { display: inline; } /* Top-of-page row on the blog index and post pages: crumb on the left, theme toggle on the right. */ .page-top { display: flex; align-items: center; justify-content: space-between; gap: 12px; } .page-top .crumb { margin: 0; } .page-top .theme-toggle { color: var(--faint); display: inline-flex; align-items: center; } .page-top .theme-toggle:hover { color: var(--accent); } .page-top .theme-toggle svg { width: 22px; height: 22px; fill: currentColor; } /* ---------- EKG divider ---------- */ .ekg { display: block; width: 100%; height: 44px; margin: 28px 0 8px; } .ekg path { fill: none; stroke: var(--accent); stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; stroke-dasharray: 1400; stroke-dashoffset: 1400; animation: heartbeat 2.2s ease-out forwards; } @keyframes heartbeat { to { stroke-dashoffset: 0; } } @media (prefers-reduced-motion: reduce) { .ekg path { animation: none; stroke-dashoffset: 0; } } /* ---------- sections ---------- */ section { margin-top: 56px; } h2 { font-size: 1.15rem; margin: 0 0 20px; display: flex; align-items: center; gap: 10px; } h2::before { content: ""; width: 10px; height: 10px; border-radius: 2px; background: var(--accent); flex-shrink: 0; } /* ---------- parallel timeline ---------- How it works: the .timeline is a CSS Grid with 2 columns (one per track) and 31 rows, each row representing half a year from mid-2026 (top) back to 2011 (bottom). Every card is pinned with grid-area: row-start / col-start / row-end / col-end, so a card's HEIGHT is its real duration, and concurrent chapters naturally sit side by side. On small screens the container switches to flexbox, the grid-area pins stop applying, and cards stack chronologically (DOM order). */ .timeline { display: grid; grid-template-columns: 1fr 1fr; grid-template-rows: auto repeat(31, minmax(18px, auto)); gap: 10px 14px; } .lane-h { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 0.8rem; letter-spacing: 0.5px; text-transform: uppercase; padding-bottom: 4px; } .tag-med { color: var(--accent); } .tag-build { color: var(--accent2); } .card { border-radius: 10px; border-left: 3px solid var(--rule); background: var(--code-bg); padding: 14px 16px; font-size: 0.93rem; line-height: 1.55; min-width: 0; } .card p { margin: 0 0 8px; } .card p:last-child { margin-bottom: 0; } .card .when { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 0.8rem; color: var(--faint); } .card .org { font-weight: 600; } .card .role { color: var(--muted); } .card.med { border-left-color: var(--accent); background: var(--accent-soft); } .card.build { border-left-color: var(--accent2); background: var(--accent2-soft); } .card.merged { border-left: 3px solid var(--accent); border-right: 3px solid var(--accent2); background: linear-gradient(90deg, var(--accent-soft), var(--accent2-soft)); } .lane-tag { display: none; } /* revealed on mobile, where lanes collapse */ /* grid-area: row-start / col-start / row-end / col-end row r covers the half-year starting at 2026.5 − (r − 1) · 0.5 */ .tl-atropos { grid-area: 2 / 1 / 3 / 3; } /* 2025 – now, both lanes */ .tl-sinai { grid-area: 3 / 1 / 4 / 2; } /* 2025 */ .tl-mgh { grid-area: 3 / 2 / 9 / 3; } /* 2023 – 2025 */ .tl-rutgers { grid-area: 4 / 1 / 6 / 2; } /* 2024 – 2025 */ .tl-tufts { grid-area: 6 / 1 / 20 / 2; } /* 2017 – 2024 */ .tl-hms { grid-area: 9 / 2 / 15 / 3; } /* 2020 – 2023 */ .tl-surgibox { grid-area: 15 / 2 / 19 / 3; } /* 2018 – 2020 */ .tl-einstein { grid-area: 20 / 2 / 22 / 3; } /* 2016 – 2017 */ .tl-minerva { grid-area: 22 / 1 / 24 / 2; } /* 2015 – 2016 */ .tl-union { grid-area: 24 / 1 / 32 / 2; } /* 2011 – 2015 */ .tl-nymc { grid-area: 29 / 2 / 33 / 3; } /* 2009 – 2013 */ /* ---------- writing / blog lists ---------- */ .post-list { list-style: none; padding: 0; margin: 0; } .post-list li { display: grid; grid-template-columns: 110px 1fr; gap: 16px; padding: 10px 0; } .post-list .date { color: var(--faint); font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 0.85rem; padding-top: 2px; white-space: nowrap; } .post-list .desc { color: var(--muted); font-size: 0.95rem; margin: 2px 0 0; } /* ---------- talks & publications ---------- */ .pub-list { list-style: none; padding: 0; margin: 0; } .pub-list li { padding: 12px 0; border-top: 1px solid var(--rule); } .pub-list li:first-child { border-top: none; } .pub-list .venue { color: var(--faint); font-size: 0.85rem; font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; } /* ---------- misc ---------- */ .note { color: var(--muted); font-size: 0.95rem; } ul.plain { padding-left: 1.2em; margin: 0; } ul.plain li { margin-bottom: 8px; } /* ---------- blog post pages ---------- */ .post-header h1 { font-size: 1.7rem; margin-bottom: 6px; } .post-meta { color: var(--faint); font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 0.85rem; } .post-body { margin-top: 32px; } .post-body h2 { margin-top: 40px; } .post-body img { max-width: 100%; border-radius: 8px; } .post-body code { background: var(--code-bg); padding: 2px 6px; border-radius: 4px; font-size: 0.88em; font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; } .post-body pre { background: var(--code-bg); padding: 16px; border-radius: 8px; overflow-x: auto; line-height: 1.5; } .post-body pre code { background: none; padding: 0; } .post-body blockquote { margin: 0; padding-left: 16px; border-left: 3px solid var(--accent); color: var(--muted); } .crumb { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 0.9rem; } /* ---------- footer ---------- */ footer { margin-top: 80px; padding-top: 24px; border-top: 1px solid var(--rule); color: var(--faint); font-size: 0.9rem; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px; } /* ---------- mobile ---------- */ @media (max-width: 600px) { .container { padding: 32px 18px 60px; } header { flex-direction: column; text-align: center; gap: 18px; } .social { justify-content: center; } /* collapse the parallel timeline into one chronological column */ .timeline { display: flex; flex-direction: column; gap: 12px; } .lane-h { display: none; } .lane-tag { display: inline; text-transform: uppercase; font-size: 0.7rem; letter-spacing: 0.5px; margin-left: 8px; } .post-list li { grid-template-columns: 1fr; gap: 2px; } }