:root{--teal:#0F766E;--teal-d:#115e59;--teal-l:#f0fdfa;--amber:#F59E0B;--amber-l:#fffbeb;--ink:#1f2937;--muted:#6b7280;--line:#e5e7eb;--side:280px}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;font-size:18px;line-height:1.65;color:var(--ink);background:#fafaf9}
a{color:var(--teal);text-underline-offset:3px}
a:hover{color:var(--teal-d)}
.sidebar{position:fixed;inset:0 auto 0 0;width:var(--side);background:#fff;border-right:1px solid var(--line);padding:28px 20px;overflow-y:auto;z-index:20}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:var(--ink);font-weight:800;font-size:1.15rem;margin-bottom:28px}
.brand img{width:44px;height:44px}
.sidebar nav a{display:block;padding:9px 14px;border-radius:10px;text-decoration:none;color:var(--ink);font-size:.95rem;font-weight:500;margin-bottom:2px}
.sidebar nav a:hover{background:var(--teal-l);color:var(--teal)}
.sidebar nav a.active{background:var(--teal);color:#fff}
.sidebar nav .sep{height:1px;background:var(--line);margin:12px 6px}
.side-cta{margin-top:24px;padding:16px;border-radius:14px;background:var(--amber-l);border:1px solid #fde68a;font-size:.9rem}
.side-cta a.btn{display:block;text-align:center;margin-top:10px}
.main{margin-left:var(--side);min-height:100vh}
.content{max-width:800px;margin:0 auto;padding:56px 32px 40px}
h1{font-size:2.3rem;line-height:1.2;margin:0 0 .5em;letter-spacing:-.02em}
h2{font-size:1.5rem;line-height:1.3;margin:2em 0 .6em;color:var(--teal-d);letter-spacing:-.01em}
h3{font-size:1.2rem;margin:1.6em 0 .4em}
.lead{font-size:1.2rem;color:#374151}
.note{background:var(--teal-l);border-left:4px solid var(--teal);padding:14px 18px;border-radius:8px;font-size:.95rem}
table{width:100%;border-collapse:collapse;margin:1em 0;font-size:.92rem;background:#fff;border-radius:12px;overflow:hidden;box-shadow:0 0 0 1px var(--line)}
th,td{padding:10px 12px;text-align:left;vertical-align:top;border-bottom:1px solid var(--line)}
th{background:var(--teal);color:#fff;font-weight:600}
tr:last-child td{border-bottom:0}
.table-wrap{overflow-x:auto}
ol.steps{counter-reset:s;list-style:none;padding:0}
ol.steps>li{counter-increment:s;position:relative;padding:0 0 18px 52px}
ol.steps>li::before{content:counter(s);position:absolute;left:0;top:0;width:34px;height:34px;border-radius:50%;background:var(--amber);color:#fff;font-weight:700;display:grid;place-items:center;font-size:.95rem}
dl.glossary dt{font-weight:700;margin-top:1.1em;color:var(--teal-d)}
dl.glossary dd{margin:.2em 0 0}
.btn{display:inline-block;background:var(--amber);color:#1f2937;font-weight:700;padding:12px 22px;border-radius:999px;text-decoration:none}
.btn:hover{background:#d97706;color:#fff}
.btn.ghost{background:transparent;border:2px solid var(--teal);color:var(--teal)}
.hero{background:linear-gradient(135deg,var(--teal) 0%,var(--teal-d) 100%);color:#fff;border-radius:24px;padding:48px 40px;margin-bottom:40px}
.hero h1{color:#fff;font-size:2.5rem}
.hero p{font-size:1.2rem;opacity:.95;max-width:40em}
.hero .btn.ghost{border-color:#fff;color:#fff;margin-left:8px}
.path{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:14px;margin:1em 0}
.path a{display:block;background:#fff;border:1px solid var(--line);border-radius:16px;padding:18px;text-decoration:none;color:var(--ink);transition:.15s}
.path a:hover{border-color:var(--teal);transform:translateY(-2px)}
.path b{display:block;color:var(--amber);font-size:1.4rem}
.path span{font-weight:600}
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:16px;margin:1em 0}
.card{background:#fff;border:1px solid var(--line);border-radius:16px;padding:20px;display:flex;flex-direction:column;gap:8px}
.card h3{margin:0;font-size:1.05rem;line-height:1.35}
.card .meta{display:flex;flex-wrap:wrap;gap:8px;font-size:.8rem}
.tag{padding:3px 10px;border-radius:999px;font-weight:600}
.tag.dl{background:var(--amber-l);color:#92400e}
.tag.beginner{background:#dcfce7;color:#166534}
.tag.consortium{background:#e0f2fe;color:#075985}
.tag.competitive{background:#fee2e2;color:#991b1b}
.card p{margin:0;font-size:.92rem;color:#374151}
.card a{font-size:.9rem;font-weight:600;margin-top:auto}
.subscribe{background:var(--amber-l);border:1px solid #fde68a;border-radius:20px;padding:32px;margin:48px 0 16px;text-align:center}
.subscribe h2{margin-top:0}
.issue-list{list-style:none;padding:0}
.issue-list li{background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px 20px;margin-bottom:12px}
.issue-list .date{color:var(--muted);font-size:.9rem}
.crumb{font-size:.9rem;color:var(--muted)}
footer{max-width:800px;margin:0 auto;padding:24px 32px 48px;font-size:.85rem;color:var(--muted);border-top:1px solid var(--line)}
.menu-toggle,.menu-btn{display:none}
@media (max-width:900px){
 .sidebar{transform:translateX(-100%);transition:transform .2s;box-shadow:0 0 40px rgba(0,0,0,.15)}
 .menu-toggle:checked~.sidebar{transform:none}
 .menu-btn{display:flex;position:fixed;top:0;left:0;right:0;height:60px;align-items:center;gap:12px;padding:0 16px;background:#fff;border-bottom:1px solid var(--line);z-index:30;font-weight:800;cursor:pointer}
 .menu-btn .bars{width:26px;height:18px;background:linear-gradient(var(--ink) 0 3px,transparent 3px 7.5px,var(--ink) 7.5px 10.5px,transparent 10.5px 15px,var(--ink) 15px 18px)}
 .menu-btn img{width:32px;height:32px}
 .sidebar{padding-top:76px;z-index:25}
 .main{margin-left:0;padding-top:60px}
 .content{padding:32px 20px}
 h1,.hero h1{font-size:1.9rem}
 .hero{padding:32px 24px}
 body{font-size:17px}
}
.subform{max-width:520px;margin:0 auto;text-align:left}
.subform .row{display:flex;gap:8px;flex-wrap:wrap}
.subform input[type=email]{flex:1 1 220px;padding:12px 16px;font:inherit;font-size:1rem;border:1px solid #d1d5db;border-radius:999px;background:#fff}
.subform input[type=email]:focus{outline:3px solid #99f6e4;border-color:var(--teal)}
.subform button{border:0;cursor:pointer;font:inherit;font-weight:700}
.subform button:disabled{opacity:.6}
.subform .consent{display:flex;gap:8px;align-items:flex-start;font-size:.82rem;color:#4b5563;margin-top:12px;line-height:1.45}
.subform .consent input{margin-top:3px}
.subform .msg{min-height:1.4em;font-weight:600;font-size:.95rem;margin:10px 0 0}
.subform .msg.ok{color:#047857}.subform .msg.err{color:#b91c1c}
.hp{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}

.substack-cta{max-width:520px;margin:0 auto;text-align:center}
.substack-cta iframe{width:100%;max-width:480px;height:150px}
.substack-fallback{margin:14px 0 0}
.substack-fallback .btn{display:inline-block}