:root{--ink:#17313a;--muted:#52636a;--brand:#175f69;--brand2:#0f4b54;--accent:#b9873e;--paper:#fff;--soft:#f3f7f7;--line:#d7e1e2;--warm:#fbf5ea;--max:1160px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;color:var(--ink);background:var(--paper);line-height:1.62}a{color:var(--brand);text-decoration-thickness:.08em;text-underline-offset:.16em}a:hover{color:var(--brand2)}img{max-width:100%}.wrap{width:min(var(--max),calc(100% - 36px));margin:auto}.site-header{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.96);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}.nav{display:flex;align-items:center;justify-content:space-between;gap:18px;min-height:72px}.brand{font-weight:800;letter-spacing:-.02em;color:var(--ink);text-decoration:none}.brand small{display:block;font-weight:500;color:var(--muted);font-size:.72rem;letter-spacing:.02em}.navlinks{display:flex;flex-wrap:wrap;gap:18px;align-items:center}.navlinks a{text-decoration:none;font-size:.94rem;font-weight:650;color:var(--ink)}.navlinks a:hover{color:var(--brand)}.hero{padding:88px 0 72px;background:linear-gradient(135deg,#f6fbfb 0%,#fff 62%,#fbf5ea 100%);border-bottom:1px solid var(--line)}.eyebrow{text-transform:uppercase;letter-spacing:.14em;color:var(--brand);font-weight:800;font-size:.78rem}.hero h1{font-size:clamp(2.55rem,7vw,5.3rem);letter-spacing:-.055em;line-height:.96;margin:.18em 0 .2em;max-width:930px}.hero h2{font-size:clamp(1.15rem,2.5vw,1.6rem);font-weight:650;color:var(--brand2);margin:0 0 20px}.lead{font-size:clamp(1.15rem,2vw,1.38rem);max-width:830px;color:#2d464e}.credentials{color:var(--muted);font-weight:600}.actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}.btn{display:inline-block;padding:12px 18px;border-radius:999px;border:1px solid var(--brand);background:var(--brand);color:#fff;text-decoration:none;font-weight:750}.btn:hover{background:var(--brand2);color:#fff}.btn.alt{background:#fff;color:var(--brand)}.btn.alt:hover{background:var(--soft)}main section{padding:70px 0}.section-soft{background:var(--soft)}.section-warm{background:var(--warm)}h1,h2,h3{line-height:1.15}h2{font-size:clamp(1.9rem,4vw,3rem);letter-spacing:-.035em;margin:0 0 18px}h3{font-size:1.28rem;margin:0 0 10px}.kicker{font-size:1.18rem;color:var(--muted);max-width:820px}.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:32px}.grid.two{grid-template-columns:repeat(2,1fr)}.card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:24px;box-shadow:0 5px 22px rgba(18,52,60,.04)}.card p:last-child{margin-bottom:0}.card strong.title{display:block;font-size:1.12rem;margin-bottom:7px}.feature{border-left:5px solid var(--accent);padding-left:24px}.quote{font-size:clamp(1.35rem,3vw,2rem);font-weight:750;line-height:1.32;max-width:880px}.pill{display:inline-block;padding:5px 10px;border-radius:999px;background:#e8f1f1;color:var(--brand2);font-size:.8rem;font-weight:750;margin:2px}.split{display:grid;grid-template-columns:1.1fr .9fr;gap:42px;align-items:start}.list-clean{padding-left:1.15rem}.list-clean li{margin:.45rem 0}.table{width:100%;border-collapse:collapse;margin:22px 0;background:#fff}.table th,.table td{border:1px solid var(--line);padding:12px 14px;vertical-align:top}.table th{text-align:left;background:#e9f2f2}.note{padding:18px 20px;border-radius:14px;background:var(--warm);border:1px solid #ead9bb}.meta{font-size:.92rem;color:var(--muted)}.page-hero{padding:64px 0 44px;background:var(--soft);border-bottom:1px solid var(--line)}.page-hero h1{font-size:clamp(2.4rem,6vw,4.5rem);letter-spacing:-.05em;margin:.15em 0}.content{max-width:880px}.content h2{margin-top:2.15em;font-size:2rem}.content h3{margin-top:1.75em}.content blockquote{margin:22px 0;padding:14px 20px;border-left:4px solid var(--brand);background:var(--soft);font-size:1.08rem}.footer{border-top:1px solid var(--line);padding:34px 0 50px;color:var(--muted);font-size:.9rem}.footer-grid{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap}.resource-card{display:grid;grid-template-columns:80px 1fr;gap:18px;align-items:start}.iconbox{width:66px;height:66px;border-radius:16px;background:var(--brand);color:#fff;display:grid;place-items:center;font-weight:900;font-size:1.35rem}.timeline{border-left:2px solid var(--line);padding-left:24px}.timeline .item{position:relative;margin:0 0 26px}.timeline .item:before{content:"";position:absolute;left:-31px;top:.42rem;width:12px;height:12px;border-radius:50%;background:var(--brand);border:3px solid #fff;box-shadow:0 0 0 1px var(--line)}.skip{position:absolute;left:-9999px}.skip:focus{left:12px;top:12px;background:#fff;padding:10px;z-index:100}.mobile{display:none}
@media(max-width:900px){.grid,.grid.two,.split{grid-template-columns:1fr}.navlinks{display:none}.mobile{display:block;font-size:.9rem}.hero{padding-top:58px}.resource-card{grid-template-columns:1fr}.iconbox{width:56px;height:56px}main section{padding:54px 0}}
@media print{.site-header,.actions,.footer{display:none}.hero,.page-hero{background:#fff;padding:20px 0}main section{padding:24px 0}.card{box-shadow:none}}

/* Portrait / profile image */
.hero-grid{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:54px;align-items:center}
.hero-copy{min-width:0}
.hero-portrait{margin:0;justify-self:end;width:min(100%,265px)}
.hero-portrait img{display:block;width:100%;height:auto;border-radius:24px;box-shadow:0 18px 48px rgba(18,52,60,.17);border:1px solid rgba(23,95,105,.16)}
.hero-portrait figcaption{font-size:.8rem;color:var(--muted);margin-top:9px;text-align:center}
.about-intro{display:grid;grid-template-columns:minmax(0,1fr) 220px;gap:38px;align-items:start}
.about-portrait{margin:0}
.about-portrait img{display:block;width:100%;height:auto;border-radius:20px;box-shadow:0 12px 34px rgba(18,52,60,.13);border:1px solid var(--line)}
@media(max-width:900px){.hero-grid,.about-intro{grid-template-columns:1fr}.hero-portrait{justify-self:start;width:220px;order:-1}.about-portrait{width:190px}.hero{padding-top:42px}}
@media(max-width:520px){.hero-portrait{width:180px}.about-portrait{width:165px}}

/* Online resource reading page */
.view-note{max-width:820px;margin:18px 0 0;padding:13px 16px;border-left:4px solid var(--accent);background:#fff;border-radius:0 10px 10px 0;color:var(--muted)}
.guide-content{max-width:960px}.guide-content .lead{max-width:900px}.guide-table td:first-child{width:38%;font-weight:650}.table-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch;margin:22px 0}.guide-frameworks{margin-top:20px}.guide-frameworks h3{color:var(--brand2)}.references li{margin:.7rem 0}.bottom-actions{padding-top:12px;border-top:1px solid var(--line);margin-top:38px}
@media(max-width:650px){.guide-table{min-width:680px}.guide-content blockquote{font-size:1rem}.view-note{font-size:.94rem}}