/* Tavi content hub — shared styles for /guides and /tools pages.
   On-brand: Instrument Serif display + Nunito body (see fonts.css), teal accent,
   warm paper bg, light + dark. Content-first, richly typeset, snippet-friendly. */

:root{
  --bg:#FAF8F5; --surface:#fff; --surface2:#F5F1E9; --raise:#FFFFFF;
  --ink:#1C1B1A; --ink2:#5A554E; --ink3:#8C877F;
  --line:#EAE4DB; --line2:#F0EBE3;
  --primary:#2BB3A3; --primary-ink:#0F6156; --primary-deep:#14897B; --primary-soft:#E6F5F2;
  --coral:#F08A6A; --coral-soft:#FBE9E2; --amber:#B26B00; --amber-soft:#F7EEDD;
  --warn:#B26B00; --danger:#C0392B; --danger-soft:#FBEDEA;
  --shadow:0 1px 2px rgba(28,27,26,.04),0 8px 28px rgba(28,27,26,.06);
  --shadow-lg:0 2px 6px rgba(28,27,26,.05),0 18px 46px rgba(28,27,26,.10);
  --maxw:720px; --serif:'Instrument Serif',Georgia,'Times New Roman',serif;
  --sans:'Nunito',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;
}
@media(prefers-color-scheme:dark){:root{
  --bg:#141413; --surface:#1E1E1C; --surface2:#242422; --raise:#26241F;
  --ink:#F3EFE9; --ink2:#B8B3AA; --ink3:#8C877F;
  --line:#2F2F2C; --line2:#282825;
  --primary:#37C9B7; --primary-ink:#8FE9DD; --primary-deep:#2BB3A3; --primary-soft:#173C38;
  --coral:#F0997C; --coral-soft:#3A211D; --amber:#E0A64D; --amber-soft:#332811;
  --warn:#E0A64D; --danger:#E27A6C; --danger-soft:#3A211D;
  --shadow:0 1px 2px rgba(0,0,0,.3),0 10px 30px rgba(0,0,0,.35);
  --shadow-lg:0 2px 8px rgba(0,0,0,.4),0 22px 50px rgba(0,0,0,.5);
}}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--sans);background:var(--bg);color:var(--ink);
  line-height:1.7;-webkit-font-smoothing:antialiased;font-size:17px}
.wrap{max-width:var(--maxw);margin:0 auto;padding:20px 22px 100px}
.wrap-wide{max-width:1080px}
a{color:var(--primary-ink);text-decoration:none}
a:hover{text-decoration:underline;text-underline-offset:3px}
img{max-width:100%;height:auto}

/* Reading-progress bar (JS-driven; harmless if JS off) */
#progress{position:fixed;top:0;left:0;height:3px;width:0;background:linear-gradient(90deg,var(--primary),var(--coral));z-index:100;transition:width .1s linear}

/* Header */
.site-header{border-bottom:1px solid var(--line);position:sticky;top:0;
  background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);z-index:40}
.site-header .bar{max-width:1080px;margin:0 auto;padding:13px 22px;display:flex;align-items:center;justify-content:space-between;gap:16px}
.brand{display:inline-flex;align-items:center;gap:9px;text-decoration:none;color:var(--ink)}
.brand:hover{text-decoration:none}
.brand-mark{flex:none;border-radius:9px;display:block}
.brand-word{display:block;height:32px;width:auto;color:var(--ink)}
.nav{display:flex;gap:20px;font-size:15px;font-weight:700;align-items:center}
.nav a{color:var(--ink2)} .nav a:hover{color:var(--ink);text-decoration:none}
.btn-mini{background:var(--primary);color:#fff !important;padding:9px 16px;border-radius:11px;font-weight:800;font-size:14.5px}
.btn-mini:hover{filter:brightness(.96);text-decoration:none}
@media(max-width:640px){.nav{gap:14px;font-size:14px}.brand-word{font-size:24px}}

/* Breadcrumb */
.crumb{font-size:13px;color:var(--ink3);margin:20px 0 4px;letter-spacing:.01em}
.crumb a{color:var(--ink3)}

/* Article layout: sticky LEFT TOC rail on wide screens, injected by content.js.
   Narrow screens: rail hidden, article flows full width. */
.reading-grid{min-width:0}
.toc-rail{display:none}
@media(min-width:1080px){
  main.wrap.has-toc{max-width:1000px}
  .reading-grid{display:grid;grid-template-columns:236px minmax(0,720px);gap:44px;align-items:start}
  .reading-grid>article{min-width:0}
  .toc-rail{display:block;position:sticky;top:84px}
}

/* Article typography */
article h1,.h1{font-family:var(--serif);font-weight:400;font-size:clamp(34px,6vw,50px);
  line-height:1.08;letter-spacing:-.005em;margin:8px 0 14px}
article h2{font-family:var(--serif);font-weight:400;font-size:clamp(26px,3.4vw,32px);line-height:1.18;
  margin:42px 0 12px;padding-top:8px}
article h3{font-size:20px;font-weight:800;margin:28px 0 8px;letter-spacing:-.01em}
article p,article li{font-size:17.5px;color:var(--ink);margin-bottom:15px}
article ul,article ol{padding-left:22px;margin-bottom:16px}
article li{margin-bottom:9px}
article li::marker{color:var(--primary)}
article strong{font-weight:800}
article a{text-decoration:underline;text-underline-offset:2px;text-decoration-color:color-mix(in srgb,var(--primary) 40%,transparent)}
.lede{font-size:20px;color:var(--ink2);margin-bottom:22px;line-height:1.55}
.eyebrow{text-transform:uppercase;letter-spacing:.1em;font-size:12.5px;font-weight:900;color:var(--primary-ink)}

/* Byline / meta */
.meta{font-size:13.5px;color:var(--ink3);margin:14px 0 24px;display:flex;flex-wrap:wrap;
  gap:6px 10px;align-items:center}
.meta span{display:inline-flex;align-items:center}
.meta span+span::before{content:'·';margin-right:10px;color:var(--line)}
.meta .rev{color:var(--ink);font-weight:800}

/* Snippet-bait answer under H1 */
.answer{background:var(--surface);border:1px solid var(--line);border-left:4px solid var(--primary);
  border-radius:14px;padding:18px 20px;margin:0 0 26px;font-size:18px;line-height:1.6;box-shadow:var(--shadow)}
.answer::before{content:'Quick answer';display:block;font-family:var(--sans);
  text-transform:uppercase;letter-spacing:.08em;font-size:11.5px;font-weight:900;color:var(--primary-ink);margin-bottom:6px}

/* Hero image */
figure.hero{margin:6px 0 28px;border-radius:18px;overflow:hidden;border:1px solid var(--line);
  background:var(--surface2);box-shadow:var(--shadow)}
figure.hero img{display:block;width:100%;height:auto;aspect-ratio:16/9;object-fit:cover}
figure.hero figcaption,figure.inline figcaption{font-size:12.5px;color:var(--ink3);padding:8px 14px}
figure.inline{margin:22px 0;border-radius:14px;overflow:hidden;border:1px solid var(--line)}
figure.inline img{display:block;width:100%;height:auto}

/* TOC */
.toc{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:16px 18px;font-size:14px}
.toc h4{text-transform:uppercase;letter-spacing:.08em;font-size:11.5px;color:var(--ink3);margin-bottom:10px;font-weight:900}
.toc ul{list-style:none;padding:0;margin:0}
.toc li{margin-bottom:8px;line-height:1.35}
.toc a{color:var(--ink2)} .toc a:hover{color:var(--primary-ink);text-decoration:none}
.toc a.active{color:var(--primary-ink);font-weight:800}

/* Tables */
.table-scroll{overflow-x:auto;margin:20px 0;border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow)}
table{border-collapse:collapse;width:100%;font-size:15.5px;min-width:440px}
th,td{text-align:left;padding:12px 15px;border-bottom:1px solid var(--line);vertical-align:top}
thead th{background:var(--surface2);font-weight:800;color:var(--ink);font-size:13.5px;
  text-transform:uppercase;letter-spacing:.03em}
tbody tr:nth-child(even){background:color-mix(in srgb,var(--surface2) 45%,transparent)}
tbody tr:last-child td{border-bottom:none}

/* Callouts */
.note,.warn,.tip{border-radius:14px;padding:16px 18px;margin:20px 0;font-size:16px;line-height:1.55;
  border:1px solid var(--line);position:relative;padding-left:48px;box-shadow:var(--shadow)}
.note{background:var(--primary-soft)} .warn{background:var(--danger-soft)} .tip{background:var(--amber-soft)}
.note::before,.warn::before,.tip::before{position:absolute;left:16px;top:15px;font-size:18px}
.note::before{content:'💡'} .warn::before{content:'⚠️'} .tip::before{content:'✅'}
.warn strong{color:var(--danger)}

/* Pull quote */
blockquote{border-left:3px solid var(--primary);padding:4px 0 4px 18px;margin:22px 0;
  font-family:var(--serif);font-size:23px;line-height:1.35;color:var(--ink2)}

/* App CTA */
.cta{background:linear-gradient(135deg,var(--primary-soft),var(--surface));
  border:1px solid var(--line);border-radius:18px;padding:24px;margin:34px 0;
  display:flex;gap:20px;align-items:center;flex-wrap:wrap;box-shadow:var(--shadow)}
.cta .cta-body{flex:1;min-width:220px}
.cta h3{font-family:var(--serif);font-weight:400;margin:0 0 6px;font-size:22px}
.cta p{margin:0;font-size:15.5px;color:var(--ink2)}
.btn{display:inline-block;background:var(--primary);color:#fff;font-weight:800;
  padding:13px 24px;border-radius:12px;white-space:nowrap;box-shadow:0 6px 16px color-mix(in srgb,var(--primary) 35%,transparent)}
.btn:hover{filter:brightness(.96);text-decoration:none}
.btn-ghost{background:transparent;color:var(--primary-ink);border:1px solid var(--line);box-shadow:none}

/* FAQ */
.faq{margin-top:16px}
.faq h2{margin-bottom:12px}
.faq details{border:1px solid var(--line);border-radius:14px;padding:2px 18px;margin-bottom:10px;
  background:var(--surface);box-shadow:var(--shadow)}
.faq summary{cursor:pointer;font-weight:800;padding:16px 0;font-size:17px;list-style:none;
  display:flex;justify-content:space-between;gap:12px;align-items:center}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:'+';color:var(--primary-ink);font-weight:800;font-size:22px;flex:none}
.faq details[open] summary::after{content:'–'}
.faq details p{padding-bottom:16px;margin:0;color:var(--ink2);font-size:16px}

/* Related */
.related{margin-top:36px;border-top:1px solid var(--line);padding-top:22px}
.related h2{font-family:var(--serif);font-weight:400;font-size:24px;margin-bottom:12px}
.related-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:12px}
.related-grid a{display:block;background:var(--surface);border:1px solid var(--line);border-radius:12px;
  padding:14px 16px;font-weight:700;color:var(--ink);font-size:15.5px;box-shadow:var(--shadow)}
.related-grid a:hover{border-color:var(--primary);text-decoration:none;transform:translateY(-1px);transition:.15s}

/* Disclaimer */
.disclaimer{font-size:13.5px;color:var(--ink3);background:var(--surface2);border:1px solid var(--line);
  border-radius:12px;padding:16px 18px;margin-top:34px;line-height:1.55}

/* ---- HUB (guides index) ---- */
.hub-hero{text-align:center;padding:36px 0 22px;position:relative}
.hub-hero .eyebrow{margin-bottom:12px;display:block}
.hub-hero h1{font-family:var(--serif);font-weight:400;font-size:clamp(38px,7vw,60px);line-height:1.02;margin-bottom:14px}
.hub-hero p{font-size:19px;color:var(--ink2);max-width:640px;margin:0 auto 22px}
.hub-search{max-width:520px;margin:0 auto}
.hub-search input{width:100%;padding:15px 18px;border:1px solid var(--line);border-radius:14px;
  background:var(--surface);color:var(--ink);font-size:16.5px;font-family:inherit;box-shadow:var(--shadow)}
.cats{display:flex;gap:9px;flex-wrap:wrap;justify-content:center;margin:22px 0 6px}
.cat-pill{border:1px solid var(--line);background:var(--surface);border-radius:100px;padding:9px 17px;
  font-weight:800;font-size:14px;color:var(--ink2);cursor:pointer}
.cat-pill.on{background:var(--primary);color:#fff;border-color:var(--primary)}

.card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:20px;margin:26px 0}
.card{background:var(--surface);border:1px solid var(--line);border-radius:18px;overflow:hidden;
  box-shadow:var(--shadow);display:flex;flex-direction:column;transition:.16s}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg);text-decoration:none}
.card .thumb{aspect-ratio:16/10;overflow:hidden;background:var(--surface2)}
.card .thumb img{width:100%;height:100%;object-fit:cover;display:block}
.card .body{padding:16px 18px 18px;display:flex;flex-direction:column;gap:7px;flex:1}
.card .tag{align-self:flex-start;font-size:11px;font-weight:900;text-transform:uppercase;letter-spacing:.05em;
  color:var(--primary-ink);background:var(--primary-soft);border-radius:100px;padding:3px 10px}
.card .tag.tool{color:var(--coral);background:var(--coral-soft)}
.card h3{font-size:18px;font-weight:800;line-height:1.25;color:var(--ink);letter-spacing:-.01em}
.card p{font-size:14.5px;color:var(--ink2);margin:0;flex:1}
.card .more{font-size:13.5px;font-weight:800;color:var(--primary-ink)}
.section-title{font-family:var(--serif);font-weight:400;font-size:28px;margin:36px 0 4px}
.no-results{text-align:center;color:var(--ink3);padding:40px;display:none}

/* Guides hub — grid / list view toggle (grid is default) */
.view-bar{display:flex;align-items:center;justify-content:flex-end;gap:10px;margin:14px 0 -10px}
.view-label{font-size:13px;font-weight:800;color:var(--ink2)}
.view-toggle{display:inline-flex;border:1px solid var(--line);border-radius:100px;background:var(--surface);padding:3px}
.view-btn{border:0;background:transparent;color:var(--ink2);font:inherit;font-size:13px;font-weight:800;
  padding:7px 15px;border-radius:100px;cursor:pointer;display:inline-flex;align-items:center;gap:7px;transition:.16s}
.view-btn:hover{color:var(--ink)}
.view-btn.on{background:var(--primary);color:#fff}
.view-btn svg{width:15px;height:15px;flex:none}
/* List layout: cards become horizontal rows */
.list-view .card-grid{grid-template-columns:1fr;gap:12px}
.list-view .card{flex-direction:row;align-items:stretch}
.list-view .card .thumb{aspect-ratio:auto;width:220px;flex:none}
.list-view .card .body{padding:15px 20px;justify-content:center;gap:6px}
.list-view .card .more{display:none}
@media (max-width:560px){
  .list-view .card .thumb{width:116px}
  .list-view .card .body{padding:12px 14px}
  .list-view .card h3{font-size:15.5px}
  .list-view .card p{display:none}
}

/* Smooth image loading — a shimmer skeleton sits BEHIND the photo (so images
   still show with JS off); JS fades each photo in over the shimmer as it decodes. */
.card .thumb, figure.hero{position:relative;isolation:isolate}
.card .thumb > img, figure.hero > img{position:relative;z-index:1}
.card .thumb::before, figure.hero::before{
  content:"";position:absolute;inset:0;z-index:0;pointer-events:none;
  background:linear-gradient(100deg,var(--surface2) 20%,var(--line2) 42%,var(--surface2) 64%);
  background-size:220% 100%;animation:tavi-shimmer 1.25s linear infinite;
  opacity:1;transition:opacity .4s ease}
.card .thumb.is-loaded::before, figure.hero.is-loaded::before{opacity:0}
.card .thumb img, figure.hero img{transition:opacity .5s ease}
.card .thumb.is-loading img, figure.hero.is-loading img{opacity:0}
.card .thumb.is-loaded img, figure.hero.is-loaded img{opacity:1}
@keyframes tavi-shimmer{from{background-position:220% 0}to{background-position:-220% 0}}
@media (prefers-reduced-motion:reduce){
  .card .thumb::before, figure.hero::before{animation:none}
  .card .thumb img, figure.hero img{transition:none}
}

/* Calculator UI */
.calc{background:var(--surface);border:1px solid var(--line);border-radius:18px;padding:24px;margin:24px 0;box-shadow:var(--shadow)}
.calc .field{margin-bottom:18px}
.calc label{display:block;font-weight:800;font-size:14.5px;margin-bottom:7px}
.calc input,.calc select{width:100%;padding:13px 15px;border:1px solid var(--line);border-radius:11px;
  background:var(--bg);color:var(--ink);font-size:16px;font-family:inherit}
.calc .row{display:flex;gap:12px;flex-wrap:wrap}
.calc .row .field{flex:1;min-width:140px}
.calc-result{background:var(--primary-soft);border:1px solid var(--line);border-radius:14px;
  padding:20px;margin-top:10px;display:none}
.calc-result.show{display:block}
.calc-result .big{font-family:var(--serif);font-size:34px;font-weight:400;color:var(--primary-ink);line-height:1}
.seg{display:flex;gap:8px;flex-wrap:wrap}
.seg button{flex:1;min-width:80px;padding:12px;border:1px solid var(--line);border-radius:11px;
  background:var(--bg);color:var(--ink);font-weight:800;font-size:14.5px;cursor:pointer;font-family:inherit}
.seg button.on{background:var(--primary);color:#fff;border-color:var(--primary)}

/* Footer */
.site-footer{border-top:1px solid var(--line);margin-top:48px;background:var(--surface2)}
.site-footer .bar{max-width:1080px;margin:0 auto;padding:26px 22px;font-size:13.5px;color:var(--ink3);
  display:flex;gap:16px;flex-wrap:wrap;justify-content:space-between}
.site-footer a{color:var(--ink3)}