:root {
  --green-950: #10201b;
  --green-900: #0c4a3c;
  --green-700: #164f42;
  --green-100: #dfe7de;
  --cream: #fbfaf6;
  --paper: #ffffff;
  --sand: #edf0e4;
  --hairline: #deddd6;
  --ink: #10201b;
  --muted: #5f675f;
  --terra: #b5643c;
  --green: #0c4a3c;
  --paper-2: #f6f4ed;
  --line: #deddd6;
  --serif: 'Libre Caslon Display', Georgia, serif;
  --sans: 'DM Sans', Arial, sans-serif;
}
* { box-sizing: border-box; margin: 0; }
body { font-family: var(--sans); color: var(--ink); background: var(--cream); line-height: 1.6; font-size: 16px; }
a { color: inherit; text-decoration: none; }
img, svg { display: block; }
.wrap { max-width: 1140px; margin: 0 auto; padding: 0 24px; }
.eyebrow { font-size: 12px; font-weight: 600; letter-spacing: .14em; text-transform: uppercase; color: var(--green-700); }
h1, h2, h3, .serif { font-family: var(--serif); font-weight: 500; line-height: 1.12; letter-spacing: -0.01em; }
.arrowlink { font-size: 14px; font-weight: 600; color: var(--ink); display: inline-flex; align-items: center; gap: 8px; }
.arrowlink:hover { color: var(--green-700); }
.arrow { width: 16px; height: 16px; stroke: currentColor; stroke-width: 1.8; fill: none; }


/* hero */
.hero { position: relative; background: var(--cream); overflow: hidden; }
.hero-grid { display: grid; grid-template-columns: minmax(0, 620px) 1fr; align-items: center; max-width: 1240px; margin: 0 auto; }
.hero-copy { padding: 72px 24px 72px; position: relative; z-index: 2; }
.hero-copy h1 { font-size: clamp(40px, 5.2vw, 58px); color: var(--green-950); margin: 16px 0 20px; }
.hero-copy .sub { font-size: 17px; color: var(--muted); max-width: 44ch; margin-bottom: 28px; }
.searchbar { display: flex; align-items: center; gap: 10px; background: var(--paper); border: 1px solid var(--hairline); border-radius: 10px; padding: 14px 16px; max-width: 460px; box-shadow: 0 1px 2px rgba(18,46,39,.05); margin-bottom: 26px; }
.searchbar svg { width: 18px; height: 18px; stroke: var(--muted); stroke-width: 1.8; fill: none; flex-shrink: 0; }
.searchbar input { border: 0; outline: none; font: inherit; font-size: 15px; width: 100%; background: transparent; color: var(--ink); }
.searchbar input::placeholder { color: #9AA69C; }
.hero-ctas { display: flex; align-items: center; gap: 28px; }
.btn-solid { background: var(--green-900); color: #fff; font-size: 14px; font-weight: 600; padding: 14px 22px; border-radius: 8px; display: inline-block; }
.btn-solid:hover { background: var(--green-700); }
.hero-art { position: relative; height: 100%; min-height: 480px; }
.hero-art svg.scene { position: absolute; inset: 0; width: 100%; height: 100%; }
.hero-fade { position: absolute; inset: 0 auto 0 0; width: 140px; background: linear-gradient(90deg, var(--cream), rgba(250,247,241,0)); z-index: 1; }

/* topics */
.section { padding: 64px 0; }
.section-head { display: flex; align-items: baseline; justify-content: space-between; margin-bottom: 32px; }
.section-head h2 { font-size: 30px; color: var(--green-950); }
.topic-grid { display: grid; grid-template-columns: repeat(8, 1fr); gap: 0; border-left: 1px solid var(--hairline); }
.topic { border-right: 1px solid var(--hairline); padding: 6px 14px; text-align: center; }
.topic .ic { width: 46px; height: 46px; margin: 0 auto 12px; stroke: var(--green-700); stroke-width: 1.5; fill: none; }
.topic .ic.terra { stroke: var(--terra); }
.topic h3 { font-family: var(--sans); font-size: 13.5px; font-weight: 600; margin-bottom: 4px; }
.topic p { font-size: 12px; color: var(--muted); line-height: 1.45; }
@media (max-width: 980px) { .topic-grid { grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--hairline); } .topic { padding: 18px 12px; } }
@media (max-width: 560px) { .topic-grid { grid-template-columns: repeat(2, 1fr); } }

/* guides */
.guides { background: var(--cream); }
.guide-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 20px; }
.gcard { background: var(--paper); border: 1px solid var(--hairline); border-radius: 12px; overflow: hidden; display: flex; flex-direction: column; transition: box-shadow .15s, transform .15s; }
.gcard:hover { box-shadow: 0 12px 32px -12px rgba(18,46,39,.18); transform: translateY(-2px); }
.gcard .media { aspect-ratio: 16/10; overflow: hidden; }
.gcard .media svg { width: 100%; height: 100%; }
.gcard .body { padding: 18px 18px 16px; display: flex; flex-direction: column; flex: 1; }
.gcard .cat { font-size: 10.5px; font-weight: 600; letter-spacing: .12em; text-transform: uppercase; color: var(--terra); margin-bottom: 8px; }
.gcard h3 { font-size: 19px; color: var(--green-950); margin-bottom: 8px; }
.gcard p { font-size: 13.5px; color: var(--muted); margin-bottom: 16px; }
.gcard .meta { margin-top: auto; display: flex; align-items: center; justify-content: space-between; font-size: 12.5px; color: var(--muted); }

/* trust */
.trust { border-top: 1px solid var(--hairline); }
.trust-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 32px; }
.titem { display: flex; gap: 14px; align-items: flex-start; }
.titem svg { width: 34px; height: 34px; stroke: var(--green-700); stroke-width: 1.4; fill: none; flex-shrink: 0; margin-top: 2px; }
.titem h3 { font-family: var(--sans); font-size: 15px; font-weight: 600; margin-bottom: 4px; }
.titem p { font-size: 13px; color: var(--muted); }

/* newsletter */
.news { background: var(--green-900); color: #F2EFE6; }
.news-inner { display: grid; grid-template-columns: 1fr auto; gap: 40px; align-items: center; padding: 52px 0; }
.news h2 { font-size: 28px; color: #FBF8F0; max-width: 20ch; }
.news .small { font-size: 13.5px; color: #B9C6BB; margin-top: 10px; max-width: 48ch; }
.news-form { display: flex; gap: 0; }
.news-form input { font: inherit; font-size: 14px; padding: 15px 18px; border: 0; outline: none; border-radius: 8px 0 0 8px; min-width: 280px; color: var(--ink); }
.news-form button { font: inherit; font-size: 14px; font-weight: 600; padding: 15px 22px; border: 0; background: var(--cream); border-left: 1px solid var(--hairline); color: var(--green-900); border-radius: 0 8px 8px 0; cursor: pointer; }
.news-form button:hover { background: #fff; }
.news .lock { display: flex; align-items: center; gap: 8px; font-size: 12.5px; color: #B9C6BB; margin-top: 12px; }
.news .lock svg { width: 14px; height: 14px; stroke: currentColor; stroke-width: 1.6; fill: none; }
@media (max-width: 900px) { .news-inner { grid-template-columns: 1fr; } .hero-grid { grid-template-columns: 1fr; } .hero-art { min-height: 320px; } }


/* ---------- interior pages ---------- */
.page-hero { background: var(--cream); border-bottom: 1px solid var(--hairline); padding: 56px 0 44px; }
.page-hero h1 { font-size: clamp(32px, 4vw, 44px); color: var(--green-950); margin: 12px 0 14px; }
.page-hero .sub { font-size: 16px; color: var(--muted); max-width: 62ch; }
.crumbs { font-size: 12.5px; color: var(--muted); margin-bottom: 18px; }
.crumbs a:hover { color: var(--green-700); }
.crumbs span { margin: 0 6px; color: var(--hairline); }

.filters { display: flex; gap: 8px; flex-wrap: wrap; margin: 28px 0 8px; }
.fchip { font-size: 13px; font-weight: 500; padding: 7px 14px; border-radius: 999px; border: 1px solid var(--hairline); background: var(--paper); color: var(--ink); cursor: pointer; font-family: var(--sans); }
.fchip:hover { border-color: var(--green-700); }
.fchip.on { background: var(--green-900); color: #fff; border-color: var(--green-900); }

.hub-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 20px; }
.hub-card { background: var(--paper); border: 1px solid var(--hairline); border-radius: 12px; padding: 26px 26px 22px; display: flex; flex-direction: column; gap: 10px; transition: box-shadow .15s; }
.hub-card:hover { box-shadow: 0 12px 32px -12px rgba(18,46,39,.16); }
.hub-card .ic { width: 40px; height: 40px; stroke: var(--green-700); stroke-width: 1.5; fill: none; }
.hub-card .ic.terra { stroke: var(--terra); }
.hub-card h3 { font-size: 21px; color: var(--green-950); }
.hub-card p { font-size: 14px; color: var(--muted); }
.hub-card .foot { margin-top: auto; padding-top: 12px; font-size: 13px; font-weight: 600; display: flex; align-items: center; gap: 8px; color: var(--green-700); }

.prose { max-width: 68ch; }
.prose h2 { font-size: 26px; color: var(--green-950); margin: 40px 0 14px; }
.prose p { font-size: 15.5px; color: #33413A; margin-bottom: 14px; }
.prose ul { margin: 0 0 14px 20px; padding: 0; color: #33413A; font-size: 15.5px; }
.prose li { margin-bottom: 8px; }
.note { background: var(--sand); border-radius: 10px; padding: 16px 20px; font-size: 14px; color: #4A5850; margin: 20px 0; }

.steps { counter-reset: step; display: grid; gap: 0; border-left: 2px solid var(--green-100); margin: 24px 0 8px; }
.step { position: relative; padding: 0 0 26px 30px; }
.step::before { counter-increment: step; content: counter(step); position: absolute; left: -15px; top: 0; width: 28px; height: 28px; border-radius: 50%; background: var(--green-900); color: #fff; font-size: 13px; font-weight: 600; display: flex; align-items: center; justify-content: center; font-family: var(--sans); }
.step h3 { font-family: var(--sans); font-size: 15.5px; font-weight: 600; margin-bottom: 4px; padding-top: 3px; }
.step p { font-size: 14px; color: var(--muted); max-width: 60ch; }

.cal-month { display: grid; grid-template-columns: 130px 1fr; gap: 24px; padding: 26px 0; border-bottom: 1px solid var(--hairline); }
.cal-month:last-child { border-bottom: 0; }
.cal-month .mon { font-family: var(--serif); font-size: 22px; color: var(--green-950); }
.cal-item { display: flex; gap: 14px; align-items: flex-start; padding: 8px 0; }
.cal-item .dot { width: 9px; height: 9px; border-radius: 50%; background: var(--terra); margin-top: 7px; flex-shrink: 0; }
.cal-item .dot.soft { background: var(--green-700); }
.cal-item h3 { font-family: var(--sans); font-size: 15px; font-weight: 600; }
.cal-item p { font-size: 13.5px; color: var(--muted); max-width: 62ch; }
.cal-legend { display: flex; gap: 22px; font-size: 13px; color: var(--muted); margin: 18px 0 6px; align-items: center; }
.cal-legend .dot { width: 9px; height: 9px; border-radius: 50%; background: var(--terra); display: inline-block; margin-right: 7px; }
.cal-legend .dot.soft { background: var(--green-700); }

.glossary dt { font-family: var(--serif); font-size: 18px; color: var(--green-950); margin-top: 22px; }
.glossary dd { margin: 6px 0 0; font-size: 14.5px; color: var(--muted); max-width: 66ch; }

.rate-list { border-top: 1px solid var(--hairline); margin-top: 8px; }
.rate-row { display: flex; justify-content: space-between; gap: 16px; padding: 12px 0; border-bottom: 1px solid var(--hairline); font-size: 14.5px; }
.rate-row .k { color: #33413A; }
.rate-row .v { font-weight: 600; color: var(--green-950); white-space: nowrap; }

.cta-band { background: var(--sand); border-radius: 14px; padding: 34px 36px; display: flex; align-items: center; justify-content: space-between; gap: 24px; flex-wrap: wrap; margin-top: 56px; }
.cta-band h2 { font-size: 24px; color: var(--green-950); }
.cta-band p { font-size: 14px; color: var(--muted); margin-top: 4px; }
@media (max-width: 700px) { .cal-month { grid-template-columns: 1fr; gap: 6px; } }

/* ---------- articles ---------- */
.art-layout { display: grid; grid-template-columns: 1fr 250px; gap: 56px; align-items: start; }
.art-meta { display: flex; gap: 16px; flex-wrap: wrap; font-size: 13px; color: var(--muted); margin-top: 16px; align-items: center; }
.badge-draft { background: var(--amber-50, #FEF3C7); color: #92400E; font-size: 11.5px; font-weight: 600; padding: 3px 10px; border-radius: 999px; }
.toc { position: sticky; top: 92px; border-left: 2px solid var(--hairline); padding-left: 18px; }
.toc h2 { font-family: var(--sans); font-size: 11.5px; font-weight: 600; letter-spacing: .1em; text-transform: uppercase; color: var(--muted); margin-bottom: 12px; }
.toc a { display: block; font-size: 13.5px; color: var(--muted); padding: 4px 0; }
.toc a:hover { color: var(--green-700); }
.art .prose { max-width: none; }
.art table { width: 100%; border-collapse: collapse; font-size: 14px; margin: 18px 0; }
.art th { text-align: left; font-family: var(--sans); font-size: 12px; letter-spacing: .05em; text-transform: uppercase; color: var(--muted); font-weight: 600; padding: 10px 12px; border-bottom: 2px solid var(--hairline); }
.art td { padding: 11px 12px; border-bottom: 1px solid var(--hairline); vertical-align: top; color: #33413A; }
.art td:first-child { font-weight: 500; color: var(--ink); }
.faq details { border-bottom: 1px solid var(--hairline); padding: 4px 0; }
.faq summary { font-family: var(--sans); font-size: 15.5px; font-weight: 600; padding: 12px 0; cursor: pointer; color: var(--ink); list-style: none; display: flex; justify-content: space-between; align-items: center; }
.faq summary::after { content: '+'; font-size: 20px; color: var(--green-700); }
.faq details[open] summary::after { content: '\2212'; }
.faq p { font-size: 14.5px; color: var(--muted); padding-bottom: 14px; max-width: 66ch; }
.sources { background: var(--sand); border-radius: 12px; padding: 20px 24px; margin: 40px 0 0; font-size: 13.5px; }
.sources h2 { font-family: var(--sans); font-size: 12px; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); margin-bottom: 10px; }
.sources li { margin-bottom: 6px; color: #4A5850; }
.related { margin-top: 56px; }
.related h2 { font-size: 24px; color: var(--green-950); margin-bottom: 18px; }
.disclaimer { font-size: 12.5px; color: var(--ink-300); margin-top: 40px; padding-top: 18px; border-top: 1px solid var(--hairline); max-width: 70ch; }
@media (max-width: 900px) { .art-layout { grid-template-columns: 1fr; } .toc { display: none; } }

.hero-art img.scene { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: 62% 40%; }

/* search */
.search-wrap { position: relative; max-width: 460px; margin-bottom: 26px; }
.search-wrap .searchbar { margin-bottom: 0; }
.search-drop { position: absolute; top: calc(100% + 6px); left: 0; right: 0; background: var(--paper); border: 1px solid var(--hairline); border-radius: 12px; box-shadow: 0 16px 40px -12px rgba(18,46,39,.18); overflow: hidden; z-index: 60; }
.search-drop a { display: block; padding: 12px 16px; border-bottom: 1px solid var(--hairline); }
.search-drop a:last-child { border-bottom: 0; }
.search-drop a:hover, .search-drop a.sel { background: var(--cream); }
.search-drop .st { font-size: 14px; font-weight: 600; color: var(--green-950); }
.search-drop .sc { font-size: 12px; color: var(--muted); }
.search-drop .none { padding: 14px 16px; font-size: 13.5px; color: var(--muted); }

/* article upgrade components */
.example { background: var(--paper); border: 1px solid var(--hairline); border-left: 3px solid var(--green-700); border-radius: 0 12px 12px 0; padding: 20px 24px; margin: 22px 0; }
.example h3 { font-family: var(--sans); font-size: 13px; font-weight: 600; letter-spacing: .06em; text-transform: uppercase; color: var(--green-700); margin-bottom: 10px; }
.example p { font-size: 14.5px; margin-bottom: 8px; }
.example .math { font-variant-numeric: tabular-nums; background: var(--cream); border-radius: 8px; padding: 12px 16px; font-size: 14px; margin: 10px 0; }
.example .math div { display: flex; justify-content: space-between; gap: 24px; padding: 3px 0; }
.example .math .tot { border-top: 1px solid var(--line-strong, #C9D4E0); margin-top: 6px; padding-top: 8px; font-weight: 600; }
.mistakes { background: #FBF3EC; border: 1px solid #EDD9C4; border-radius: 12px; padding: 20px 24px; margin: 22px 0; }
.mistakes h3 { font-family: var(--sans); font-size: 13px; font-weight: 600; letter-spacing: .06em; text-transform: uppercase; color: var(--terra); margin-bottom: 10px; }
.mistakes ul { margin: 0 0 0 18px; padding: 0; }
.mistakes li { font-size: 14.5px; color: #5A4633; margin-bottom: 8px; }
.mistakes li strong { color: #7A3E1D; font-weight: 600; }
figure.diagram { margin: 26px 0; }
figure.diagram svg { width: 100%; height: auto; display: block; }
figure.diagram figcaption { font-size: 12.5px; color: var(--muted); margin-top: 10px; text-align: center; }
.reviewline { display: inline-flex; align-items: center; gap: 6px; }
.reviewline svg { width: 14px; height: 14px; stroke: var(--green-700); stroke-width: 2; fill: none; }

/* ---------- ported from the homepage design ---------- */
.container{width:min(1120px,calc(100% - 72px));margin:0 auto}
header{height:74px;background:rgba(251,250,246,.98);border-bottom:1px solid rgba(0,0,0,.04);display:flex;align-items:center;position:sticky;top:0;z-index:50}
.nav{display:flex;align-items:center;gap:28px;width:min(1180px,calc(100% - 56px));margin:auto}
.brand{display:flex;align-items:center;gap:18px;min-width:270px}
.logo{font-family:var(--serif);font-size:34px;letter-spacing:-1.6px;color:var(--green);line-height:1}
.tagline{font-size:11px;line-height:1.25;font-weight:600;color:#27332d}
.menu{display:flex;align-items:center;gap:34px;flex:1;justify-content:center;font-size:13px;font-weight:600}
.menu a:hover{color:var(--green)}
.nav-actions{display:flex;gap:12px;align-items:center}
.icon-btn,.cta{border:1px solid #d8d8d0;background:#fff;border-radius:9px;height:42px;display:grid;place-items:center;color:var(--ink)}
.icon-btn{width:42px}
.cta{padding:0 20px;background:var(--green);color:#fff;border-color:var(--green);font-size:13px;font-weight:700}
.search-svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.9;stroke-linecap:round;stroke-linejoin:round}
footer.site{background:var(--paper-2);border-top:1px solid var(--line);padding:56px 0 32px;margin-top:64px}
footer.site .foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr 1fr;gap:32px}
footer.site .wordmark{font-family:var(--serif);font-size:28px;letter-spacing:-1.2px;color:var(--green);display:block;margin-bottom:10px}
footer.site p{font-size:13.5px;color:var(--muted);max-width:280px;margin:0 0 14px;line-height:1.5}
footer.site h4{font-size:12px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--ink);margin:0 0 12px}
footer.site ul{list-style:none;margin:0;padding:0}
footer.site li{margin:0 0 9px;font-size:13.5px}
footer.site li a{color:var(--muted)}
footer.site li a:hover{color:var(--green)}
footer.site .copyright{font-size:12.5px;color:var(--muted);margin:36px 0 0;padding-top:20px;border-top:1px solid var(--line);text-align:left;max-width:none}
@media(max-width:980px){.menu{display:none}.brand{min-width:0;flex:1}.tagline{display:none}}
@media(max-width:720px){header{height:64px}.nav{width:calc(100% - 28px)}.logo{font-size:30px}.cta{padding:0 14px}}
@media(max-width:900px){footer.site .foot-grid{grid-template-columns:1fr 1fr}}
@media(max-width:560px){footer.site .foot-grid{grid-template-columns:1fr}}

/* type: Libre Caslon Display ships at 400 only, and sits smaller than Fraunces */
h1,h2,h3,.serif{font-weight:400;letter-spacing:-0.02em}
.page-hero{padding:60px 0 46px}
.page-hero h1{font-size:clamp(40px,5vw,58px);letter-spacing:-2px;line-height:1.0}
.page-hero .sub{font-size:16.5px;color:#27332d}
.section-head h2{font-size:34px}
.prose h2{font-size:28px;letter-spacing:-.5px}
.gcard h3{font-size:21px;line-height:1.15}
.gcard .cat{color:var(--green-700);letter-spacing:.1em}
.hub-card h3{font-size:23px}
.related h2{font-size:28px}
.cal-month .mon{font-size:24px}
.glossary dt{font-size:20px}
.cta-band h2{font-size:26px}
.news h2{font-size:30px}
.eyebrow{color:var(--green-700)}
.btn-solid{border-radius:9px;background:var(--green)}
.btn-solid:hover{background:var(--green-2,#164f42)}
.fchip.on{background:var(--green);border-color:var(--green)}
.toc{top:96px}
.news{background:var(--green-900)}

/* checklists */
.checklist{list-style:none;margin:0 0 8px;padding:0}
.checklist li{position:relative;padding:0 0 0 34px;margin:0 0 12px;font-size:15.5px;line-height:1.55;color:#27332d}
.checklist li::before{content:"";position:absolute;left:0;top:4px;width:18px;height:18px;border:1.5px solid var(--green-700);border-radius:5px;background:#fff}
.checklist li a{color:var(--green-700);text-decoration:underline;text-underline-offset:2px;font-size:14px}
.prose .checklist+h2{margin-top:36px}