/* ===========================================================
   Preserve Smarter — shared design system (every page links this)
   Rev. 2026-10-24
   - Brand colours now match the logo (#035E6E teal / #EB6309 orange)
   - Fonts self-hosted (no Google request, no third-party origin)
   - No Bootstrap dependency: minimal reset below replaces it
   - Every text/background pair checked against WCAG AA (4.5:1 body,
     3:1 large text and focus rings) in BOTH themes
   =========================================================== */

/* ---------- Self-hosted fonts (SIL OFL — licences in /fonts) ---------- */
@font-face{font-family:'Fraunces';font-style:normal;font-weight:600;font-display:swap;
  src:url('../fonts/fraunces-latin-600-normal.woff2') format('woff2');}
@font-face{font-family:'Inter';font-style:normal;font-weight:400;font-display:swap;
  src:url('../fonts/inter-latin-400-normal.woff2') format('woff2');}
@font-face{font-family:'Inter';font-style:normal;font-weight:600;font-display:swap;
  src:url('../fonts/inter-latin-600-normal.woff2') format('woff2');}
@font-face{font-family:'Source Serif 4';font-style:normal;font-weight:400;font-display:swap;
  src:url('../fonts/source-serif-4-latin-400-normal.woff2') format('woff2');}
@font-face{font-family:'Source Serif 4';font-style:normal;font-weight:600;font-display:swap;
  src:url('../fonts/source-serif-4-latin-600-normal.woff2') format('woff2');}
@font-face{font-family:'Space Grotesk';font-style:normal;font-weight:600;font-display:swap;
  src:url('../fonts/space-grotesk-latin-600-normal.woff2') format('woff2');}

:root{
  /* ---- fixed brand colours (never change with theme) ---- */
  --brand-teal:#035E6E;        /* logo teal */
  --brand-teal-2:#1F7D8C;      /* gradient partner — white text 4.8:1 */
  --brand-orange:#EB6309;      /* logo orange — decoration & large wordmark only */
  --brand-orange-deep:#AE4508; /* button fill — white text 5.75:1 */
  --on-brand:#FFFFFF;          /* text on any brand fill */
  --ink-fixed:#12241E;         /* dark text on fixed white surfaces */

  /* ---- theme palette (light) ---- */
  --frost:#F5F8F7;             /* page background */
  --frost-dim:#EAF0EE;         /* tinted panels */
  --white:#FFFFFF;             /* card surface (dark in dark mode) */
  --ink:#12241E;               /* headings/body 15:1 */
  --ink-soft:#2C3B36;          /* body copy 11:1 */
  --sage:#5B6B64;              /* muted text 4.9:1 on darkest panel (was #7C8C85, 3.1:1 — failed) */
  --sage-line:#D6E0DC;         /* borders only, never text */
  --vacuum-deep:#035E6E;       /* links, icons, data numbers 6.4:1 */
  --vacuum:#1F7D8C;            /* focus rings, hover borders 4.2:1 */
  --accent-text:#AE4508;       /* kickers, eyebrow, hover links 5.0:1 */
  --logo-teal:#035E6E;         /* "Preserve" wordmark 6.9:1 */
  --logo-orange:#BD5009;       /* "Smarter" wordmark 4.55:1 — a shade deeper than the logo leaf so the text passes AA */

  /* ---- legacy names kept so existing markup keeps working ---- */
  --harvest:var(--brand-orange);
  --harvest-deep:var(--accent-text);

  /* ---- type ---- */
  --f-display:'Fraunces', Georgia, serif;
  --f-ui:'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --f-article:'Source Serif 4', Georgia, 'Times New Roman', serif;
  --f-data:'Space Grotesk', var(--f-ui);

  /* ---- rhythm ---- */
  --radius:14px;
  --radius-sm:8px;
  --shadow-soft:0 4px 24px rgba(18,36,30,0.06);
  --shadow-lift:0 12px 32px rgba(18,36,30,0.12);
  --container:1140px;
  --transition:.3s ease;
}

[data-theme="dark"]{
  --frost:#101E19;
  --frost-dim:#16261F;
  --white:#17271F;
  --ink:#F1F5F3;
  --ink-soft:#C9D6D1;
  --sage:#8FA39C;              /* 5.9:1 */
  --sage-line:#25352F;
  --vacuum-deep:#3FA3B3;       /* 5.3:1 (was #2A5C69, 2.3:1 — failed) */
  --vacuum:#3FA3B3;
  --accent-text:#F08A45;       /* 6.3:1 (was #A8551F, 3.3:1 — failed) */
  --logo-teal:#3FA3B3;
  --logo-orange:#EB6309;       /* true logo orange passes on dark: 5.2:1 */
  --shadow-soft:0 4px 24px rgba(0,0,0,0.35);
  --shadow-lift:0 12px 32px rgba(0,0,0,0.5);
  color-scheme:dark;           /* native controls & scrollbars follow theme */
}

/* ---------- Minimal reset (replaces Bootstrap Reboot) ---------- */
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth; -webkit-text-size-adjust:100%; text-size-adjust:100%;}
body{
  margin:0;
  font-family:var(--f-ui);
  font-size:1rem;
  line-height:1.5;
  background:var(--frost);
  color:var(--ink);
  transition:background var(--transition), color var(--transition);
  -webkit-font-smoothing:antialiased;
  /* stops sideways scroll; clip (not hidden) so the sticky nav keeps working */
  overflow-x:hidden;
  overflow-x:clip;
}
h1,h2,h3,h4,p,ul,ol,dl,figure,blockquote{margin-top:0;}
p,ul,ol,dl{margin-bottom:1rem;}
img,svg{vertical-align:middle;}
img{max-width:100%; height:auto;}
button,input,select,textarea{font:inherit; color:inherit;}
button{cursor:pointer;}
table{border-collapse:collapse;}
strong,b{font-weight:600;}

.container-xl{max-width:var(--container); margin:0 auto; padding:0 20px;}
.narrow{max-width:740px; margin-left:auto; margin-right:auto;}

h1,h2,h3,.font-display{font-family:var(--f-display); font-weight:600; letter-spacing:-0.01em; color:var(--ink); line-height:1.2;}
.font-data{font-family:var(--f-data); font-variant-numeric:tabular-nums;}
p, li{color:var(--ink-soft); line-height:1.65;}
a{color:var(--vacuum-deep); text-decoration:none;}
a:hover{color:var(--accent-text);}
/* links inside running text are underlined: colour alone must not signal a link (WCAG 1.4.1) */
p a:not(.btn), .article-body li a:not(.related-card):not(.btn), .stat .source a{text-decoration:underline; text-underline-offset:2px;}

/* ---------- Icons (inline SVG sprite: images/icons.svg) ---------- */
.icon{width:1em; height:1em; fill:currentColor; vertical-align:-.125em; flex-shrink:0;}

/* ---------- Accessibility helpers ---------- */
.visually-hidden{
  position:absolute !important; width:1px !important; height:1px !important; padding:0 !important;
  margin:-1px !important; overflow:hidden !important; clip:rect(0,0,0,0) !important;
  white-space:nowrap !important; border:0 !important;
}
.skip-link{
  position:absolute; top:-100%; left:1rem; z-index:9999;
  background:var(--brand-teal); color:var(--on-brand); padding:.6rem 1rem;
  border-radius:0 0 6px 6px; font-weight:600; transition:top .2s;
}
.skip-link:focus{top:0; color:var(--on-brand);}

/* visible keyboard focus on everything interactive */
:focus-visible{outline:3px solid var(--vacuum); outline-offset:3px; border-radius:3px;}
:focus:not(:focus-visible){outline:none;}

/* ---------- Nav ---------- */
.site-nav{
  position:sticky; top:0; z-index:50;
  background:var(--frost);
  background:color-mix(in srgb, var(--frost) 90%, transparent);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--sage-line);
}
.site-nav .nav-inner{display:flex; align-items:center; justify-content:space-between; gap:12px; padding:16px 20px;}
.nav-links{display:flex; gap:28px; list-style:none; margin:0; padding:0;}
.nav-links a{font-size:.95rem; font-weight:600; color:var(--ink-soft);}
.nav-links a:hover, .nav-links a[aria-current="page"]{color:var(--accent-text);}
.nav-actions{display:flex; align-items:center; gap:10px;}
.theme-toggle{
  border:1px solid var(--sage-line); background:transparent; border-radius:999px;
  width:44px; height:44px; display:flex; align-items:center; justify-content:center;
  color:var(--ink-soft); transition:background .2s;
}
.theme-toggle:hover{background:var(--frost-dim);}
.theme-toggle .icon{width:18px; height:18px;}
.nav-toggle{
  display:none; border:none; background:none; color:var(--ink);
  width:44px; height:44px; align-items:center; justify-content:center; padding:0;
}
.nav-toggle .icon{width:26px; height:26px;}

@media (max-width:860px){
  .nav-links{
    position:absolute; top:100%; left:0; right:0; flex-direction:column; gap:0;
    background:var(--frost); border-bottom:1px solid var(--sage-line);
    max-height:0; overflow:hidden;
    /* hidden links must not be reachable by Tab while the menu is closed */
    visibility:hidden;
    transition:max-height .3s ease, visibility 0s linear .3s;
  }
  .nav-links.open{max-height:320px; visibility:visible; transition:max-height .3s ease, visibility 0s;}
  .nav-links li{border-top:1px solid var(--sage-line);}
  .nav-links a{display:block; padding:14px 20px;}
  .nav-toggle{display:flex;}
}

/* ---------- Brand (logo + wordmark) ---------- */
.brand{display:flex; align-items:center; gap:14px; text-decoration:none;}
.logo-img{width:42px; height:42px; flex-shrink:0; display:block;}
.logo-dark{display:none;}
[data-theme="dark"] .logo-light{display:none;}
[data-theme="dark"] .logo-dark{display:block;}
.logo-text{
  display:flex; align-items:baseline; gap:.35rem;
  font-family:var(--f-display); font-size:1.45rem; font-weight:600; line-height:1;
}
.logo-text .preserve{color:var(--logo-teal);}
.logo-text .smarter{color:var(--logo-orange);}
footer .logo-img{width:34px; height:34px;}
footer .logo-text{font-size:1.2rem;}
/* phones: keep wordmark clear of the two 44px nav buttons (checked at 320/375/390px) */
@media (max-width:420px){
  .logo-text{font-size:1.15rem;}
  .logo-img{width:34px; height:34px;}
  .brand{gap:8px;}
  .nav-actions{gap:6px;}
}
@media (max-width:340px){
  .logo-text{font-size:1rem;}
  .logo-img{width:30px; height:30px;}
}

/* ---------- Hero ---------- */
.hero{
  position:relative; overflow:hidden;
  padding:96px 0 72px;
  background:
    radial-gradient(circle at 15% 20%, color-mix(in srgb, var(--brand-teal-2) 14%, transparent), transparent 55%),
    radial-gradient(circle at 85% 75%, color-mix(in srgb, var(--brand-orange) 14%, transparent), transparent 55%);
}
.hero::before{
  /* frost crystal lattice motif — pure CSS, no imagery needed */
  content:""; position:absolute; inset:0; opacity:.35; pointer-events:none;
  background-image:
    linear-gradient(30deg, color-mix(in srgb, var(--brand-teal-2) 22%, transparent) 1px, transparent 1px),
    linear-gradient(150deg, color-mix(in srgb, var(--brand-teal-2) 22%, transparent) 1px, transparent 1px),
    linear-gradient(90deg, color-mix(in srgb, var(--brand-teal-2) 14%, transparent) 1px, transparent 1px);
  background-size:64px 110px, 64px 110px, 64px 110px;
  -webkit-mask-image:linear-gradient(to bottom, black, transparent 85%);
  mask-image:linear-gradient(to bottom, black, transparent 85%);
}
.hero-inner{position:relative; z-index:1; max-width:760px;}
.eyebrow{
  font-family:var(--f-data); font-weight:600; font-size:.8rem; letter-spacing:.12em; text-transform:uppercase;
  color:var(--vacuum-deep); display:flex; align-items:center; gap:8px; margin-bottom:18px;
}
.eyebrow .dot{width:7px; height:7px; border-radius:50%; background:var(--brand-orange);}
.hero h1{font-size:clamp(2.1rem, 5vw, 3.6rem); line-height:1.08; margin:0 0 20px;}
.hero .lede{font-size:1.15rem; max-width:560px; margin-bottom:34px;}
.hero-ctas{display:flex; gap:14px; flex-wrap:wrap;}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex; align-items:center; gap:8px; padding:13px 24px; border-radius:999px;
  min-height:44px; font-family:var(--f-ui); font-weight:600; font-size:.95rem; line-height:1.2;
  text-decoration:none; border:1px solid transparent; transition:transform .15s, box-shadow .15s;
}
.btn:hover{transform:translateY(-1px);}
/* fixed colours: white on deep orange is 5.75:1 in both themes (dark mode used to put dark text here — 2.96:1) */
.btn-primary{background:var(--brand-orange-deep); color:var(--on-brand);}
.btn-primary:hover{color:var(--on-brand); box-shadow:var(--shadow-lift);}
.btn-ghost{background:transparent; border-color:var(--sage-line); color:var(--ink);}
.btn-ghost:hover{color:var(--ink); border-color:var(--vacuum);}

/* ---------- Stat strip ---------- */
.stat-strip{border-top:1px solid var(--sage-line); border-bottom:1px solid var(--sage-line); background:var(--frost-dim);}
.stat-grid{display:grid; grid-template-columns:repeat(3,1fr); gap:0;}
.stat{padding:32px 20px; text-align:center; border-left:1px solid var(--sage-line);}
.stat:first-child{border-left:none;}
.stat .num{font-family:var(--f-data); font-size:clamp(1.45rem, 3vw, 2.1rem); font-weight:600; color:var(--vacuum-deep); display:block;}
.stat .label{font-size:.85rem; color:var(--sage); margin-top:4px; display:block;}
.stat .source{font-size:.75rem; color:var(--sage); display:block; margin-top:6px;}
@media (max-width:700px){
  .stat-grid{grid-template-columns:1fr;}
  .stat{border-left:none; border-top:1px solid var(--sage-line);}
  .stat:first-child{border-top:none;}
}

/* ---------- Section shell ---------- */
.section{padding:80px 0;}
.section.pt-0{padding-top:0;}
.section-head{max-width:640px; margin-bottom:44px;}
.section-head .kicker, .kicker{font-family:var(--f-data); font-size:.8rem; letter-spacing:.1em; text-transform:uppercase; color:var(--accent-text); font-weight:600;}
.section-head h2{font-size:clamp(1.7rem,3vw,2.3rem); margin:10px 0 12px;}
.section-head p{font-size:1.05rem;}

/* ---------- Reading path cards ---------- */
.path-list{display:flex; flex-direction:column; gap:14px; list-style:none; padding:0; margin:0;}
.path-card{
  display:flex; align-items:center; gap:22px; padding:22px 26px; border-radius:var(--radius);
  background:var(--white); border:1px solid var(--sage-line); box-shadow:var(--shadow-soft);
  text-decoration:none; transition:transform .2s ease, box-shadow .2s ease, border-color .2s ease, opacity .4s ease;
}
/* only hide-for-reveal when JS is confirmed running — content stays visible if scripts fail */
.js .path-card{opacity:0; transform:translateY(16px);}
.js .path-card.revealed{opacity:1; transform:translateY(0);}
.path-card:hover{transform:translateY(-3px); box-shadow:var(--shadow-lift); border-color:var(--vacuum);}
.path-step{
  font-family:var(--f-data); font-weight:600; font-size:1rem; width:44px; height:44px; border-radius:50%;
  display:flex; align-items:center; justify-content:center; flex-shrink:0; color:var(--on-brand);
}
/* teal → orange progression; every step ≥5.2:1 with white text (old #C97D2E was 3.25:1) */
.step-1{background:#035E6E;} .step-2{background:#0B6675;} .step-3{background:#17707E;} .step-4{background:#3D6B5E;}
.step-5{background:#6A5F3A;} .step-6{background:#7A5A2A;} .step-7{background:#9A4A10;} .step-8{background:#AE4508;}
.path-card h3{font-size:1.08rem; margin:0 0 4px; font-weight:600; color:var(--ink);}
.path-card p{font-size:.92rem; margin:0; color:var(--sage);}
.path-card .arrow{margin-left:auto; color:var(--sage);}
@media (max-width:480px){.path-card{gap:14px; padding:18px;}}

/* ---------- Trust / how-it-works ---------- */
.trust-grid{display:grid; grid-template-columns:repeat(3,1fr); gap:24px;}
.trust-card{padding:26px; border-radius:var(--radius); background:var(--frost-dim); border:1px solid var(--sage-line);}
.trust-card .icon{font-size:1.4rem; color:var(--vacuum-deep); margin-bottom:12px; display:block;}
.trust-card h3{font-size:1.05rem; margin:0 0 8px;}
.trust-card p{font-size:.92rem; margin:0;}
@media (max-width:800px){.trust-grid{grid-template-columns:1fr;}}

/* ---------- Pillar callout (fixed brand gradient, readable in both themes) ---------- */
.pillar{
  border-radius:20px; padding:52px; position:relative; overflow:hidden;
  background:linear-gradient(135deg, var(--brand-teal), var(--brand-teal-2) 55%, var(--brand-orange-deep));
  color:var(--on-brand);
}
.pillar h2, .pillar p, .pillar .kicker{color:var(--on-brand);}
.pillar h2{font-size:clamp(1.6rem,3vw,2.3rem); margin:10px 0 12px;}
.pillar p{max-width:520px; margin-bottom:26px;}
.pillar .btn-primary{background:#FFFFFF; color:var(--ink-fixed);}
.pillar .btn-primary:hover{color:var(--ink-fixed);}
.pillar :focus-visible{outline-color:#FFFFFF;}
@media (max-width:600px){.pillar{padding:32px 24px;}}

/* ---------- Newsletter (Kit form drops in here) ---------- */
.newsletter{background:var(--frost-dim); border-radius:var(--radius); padding:44px; text-align:center;}
.newsletter h2{font-size:1.5rem; margin:0;}
.newsletter > p{max-width:420px; margin:8px auto 0;}
.newsletter small{display:block; margin-top:14px; color:var(--sage);}
.subscribe-form{max-width:520px; margin:22px auto 0; text-align:left;}
.subscribe-row{display:flex; flex-wrap:wrap; gap:10px; align-items:flex-end;}
.subscribe-label{flex-basis:100%; font-weight:600; font-size:.9rem; color:var(--ink);}  /* visible label — placeholder is never a label */
.subscribe-row input{
  flex:1 1 240px; min-height:48px; padding:12px 16px; border-radius:999px;
  border:1px solid var(--sage); background:var(--white); color:var(--ink); font-size:1rem;
}
.subscribe-row input:focus-visible{outline:3px solid var(--vacuum); outline-offset:2px;}
.subscribe-row .btn{min-height:48px;}
.subscribe-consent{font-size:.85rem; color:var(--ink-soft); margin:12px 0 0;}
@media (max-width:480px){.subscribe-row .btn{flex:1 1 100%; justify-content:center;}}
@media (max-width:600px){.newsletter{padding:32px 20px;}}

/* ---------- Footer ---------- */
footer{border-top:1px solid var(--sage-line); padding:48px 0 28px;}
.footer-grid{display:flex; justify-content:space-between; gap:32px; flex-wrap:wrap; margin-bottom:28px;}
.footer-cols{display:flex; gap:56px; flex-wrap:wrap;}
.footer-heading{font-family:var(--f-ui); font-size:.85rem; font-weight:600; text-transform:uppercase; letter-spacing:.08em; color:var(--sage); margin:0 0 12px;}
.footer-cols ul{list-style:none; padding:0; margin:0; display:flex; flex-direction:column; gap:8px;}
.footer-cols a{font-size:.92rem; color:var(--ink-soft); display:inline-block; padding:2px 0;}
.footer-cols a:hover{color:var(--accent-text);}
.disclosure{font-size:.82rem; color:var(--sage); border-top:1px solid var(--sage-line); padding-top:20px; line-height:1.6;}
.copyright{font-size:.82rem; color:var(--sage); margin-top:14px;}

/* ===========================================================
   Article page components
   =========================================================== */
.article-header{padding:56px 0 28px; border-bottom:1px solid var(--sage-line);}
.article-header h1{font-size:clamp(1.9rem,4.2vw,2.9rem); line-height:1.12; margin:12px 0 16px; max-width:820px;}
.byline{display:flex; align-items:center; gap:14px; font-size:.88rem; color:var(--sage); flex-wrap:wrap;}
.byline .dot-sep::before{content:"·"; margin-right:14px;}

.article-body{max-width:740px; margin:0 auto; padding:48px 20px 80px;}
.article-body h2{font-size:1.55rem; margin:44px 0 16px; scroll-margin-top:90px;}
.article-body h2.mt-section{margin-top:56px;}
.article-body h3{font-size:1.2rem; margin:28px 0 12px;}
.article-body p{font-size:1.05rem; font-family:var(--f-article); margin-bottom:18px;}
.article-body li{font-size:1.05rem; font-family:var(--f-article);}
.article-body ul, .article-body ol{padding-left:1.3em; margin-bottom:18px;}
.article-body .note, .note{font-size:.9rem; color:var(--sage); font-family:var(--f-ui);}

/* Affiliate disclosure shown near the top of pages with buying links (FTC: clear & near the claim) */
.disclosure-inline{
  font-family:var(--f-ui); font-size:.85rem; color:var(--ink-soft); background:var(--frost-dim);
  border:1px solid var(--sage-line); border-radius:var(--radius-sm); padding:10px 14px; margin:0 0 24px;
}

.quick-answer{
  background:var(--frost-dim); border-left:4px solid var(--vacuum); border-radius:var(--radius-sm);
  padding:24px 26px; margin:28px 0;
}
.quick-answer .qa-label{font-family:var(--f-data); font-size:.78rem; letter-spacing:.08em; text-transform:uppercase; color:var(--vacuum-deep); font-weight:600; margin-bottom:10px; display:flex; align-items:center; gap:6px;}
.quick-answer ul{margin:12px 0 16px; padding-left:1.2em;}
.quick-answer p, .quick-answer li{font-family:var(--f-ui); font-size:.98rem; margin-bottom:6px;}

.takeaways{background:var(--white); border:1px solid var(--sage-line); border-radius:var(--radius); padding:24px 26px; margin:28px 0;}
.takeaways .qa-label{font-family:var(--f-data); font-size:.78rem; letter-spacing:.08em; text-transform:uppercase; color:var(--accent-text); font-weight:600; display:flex; align-items:center; gap:6px; margin-bottom:10px;}
.takeaways ul{margin:0; padding-left:1.2em;}
.takeaways li{font-family:var(--f-ui); font-size:.95rem; margin-bottom:8px;}

.toc{background:var(--frost-dim); border-radius:var(--radius); padding:20px 24px; margin:28px 0;}
.toc summary{font-family:var(--f-data); font-weight:600; font-size:.9rem; text-transform:uppercase; letter-spacing:.06em; cursor:pointer; color:var(--ink);}
.toc ol{margin:14px 0 0; padding-left:1.2em;}
.toc a, .article-body .toc a{font-size:.95rem; color:var(--ink-soft); text-decoration:none;}
.toc a:hover{color:var(--accent-text);}

.fact-card{
  display:flex; gap:16px; align-items:flex-start; background:var(--white); border:1px solid var(--sage-line);
  border-radius:var(--radius-sm); padding:18px 20px; margin:22px 0;
}
.fact-card > .icon{color:var(--accent-text); font-size:1.3rem; margin-top:2px;}
.fact-card p{margin:0; font-size:.98rem;}

/* fixed brand gradient: white text ≥4.8:1, white button with dark text in BOTH themes
   (dark mode used to show near-white text on a white button — 1.1:1, invisible) */
.cta-inline{
  display:flex; align-items:center; justify-content:space-between; gap:16px; flex-wrap:wrap;
  background:linear-gradient(135deg, var(--brand-teal), var(--brand-teal-2)); color:var(--on-brand);
  border-radius:var(--radius); padding:26px 28px; margin:34px 0;
}
.cta-inline p{color:var(--on-brand); margin:0; font-family:var(--f-ui); font-weight:600; font-size:1.02rem;}
.cta-inline .btn-primary{background:#FFFFFF; color:var(--ink-fixed);}
.cta-inline .btn-primary:hover{color:var(--ink-fixed);}
.cta-inline :focus-visible{outline-color:#FFFFFF;}

.faq-item{border-bottom:1px solid var(--sage-line); padding:18px 0;}
.faq-item summary{font-family:var(--f-ui); font-weight:600; font-size:1.02rem; cursor:pointer; color:var(--ink); list-style:none; display:flex; justify-content:space-between; align-items:center; gap:16px;}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{content:"+"; font-size:1.3rem; color:var(--sage); font-weight:400; flex-shrink:0;}
.faq-item[open] summary::after{content:"–";}
.faq-item p{margin:12px 0 0; font-size:.98rem;}

.related-grid, .article-body .related-grid{padding-left:0;}
.related-grid{display:grid; grid-template-columns:repeat(2,1fr); gap:16px; margin-top:16px; list-style:none; padding:0;}
.related-card{
  display:block; padding:20px; border-radius:var(--radius-sm); background:var(--white); border:1px solid var(--sage-line);
  text-decoration:none; transition:border-color .2s, transform .2s;
}
.related-card:hover{border-color:var(--vacuum); transform:translateY(-2px);}
.related-card .step-tag{font-family:var(--f-data); font-size:.75rem; color:var(--sage); text-transform:uppercase; display:block;}
.related-card .related-title{font-family:var(--f-ui); font-size:1rem; margin:6px 0 0; color:var(--ink); font-weight:600; display:block;}
@media (max-width:600px){.related-grid{grid-template-columns:1fr;}}


/* ---- Comparison cards ---- */
.comparison-grid{display:grid; grid-template-columns:repeat(4,1fr); gap:16px; margin:28px 0 8px;}
.comparison-card{
  background:var(--white); border:1px solid var(--sage-line); border-radius:var(--radius);
  padding:22px 20px; position:relative; display:flex; flex-direction:column; gap:12px;
}
.comparison-card.winner{border-color:var(--brand-orange-deep); box-shadow:var(--shadow-lift);}
.comparison-card .winner-badge{
  position:absolute; top:-11px; left:20px; background:var(--brand-orange-deep); color:var(--on-brand);
  font-family:var(--f-data); font-size:.7rem; font-weight:600; letter-spacing:.05em; text-transform:uppercase;
  padding:4px 10px; border-radius:999px;
}
.comparison-card .method-icon{font-size:1.6rem; color:var(--vacuum-deep);}
.comparison-card h3{font-size:1.05rem; margin:0; font-family:var(--f-ui); font-weight:600;}
.comparison-card dl{margin:0; font-size:.85rem;}
.comparison-card dt{font-family:var(--f-data); text-transform:uppercase; letter-spacing:.04em; font-size:.7rem; color:var(--sage); margin-top:10px;}
.comparison-card dd{margin:2px 0 0; color:var(--ink-soft);}
/* inside the 740px article column four cards are too narrow — use two */
.article-body .comparison-grid{grid-template-columns:repeat(2,1fr);}
@media (max-width:900px){.comparison-grid{grid-template-columns:repeat(2,1fr);}}
@media (max-width:560px){.comparison-grid, .article-body .comparison-grid{grid-template-columns:1fr;}}

/* ---- Use-case list ---- */
.use-case-grid{display:grid; grid-template-columns:repeat(2,1fr); gap:14px; margin:20px 0; list-style:none; padding:0;}
.use-case{background:var(--frost-dim); border-radius:var(--radius-sm); padding:16px 18px; display:flex; gap:12px; align-items:flex-start;}
.use-case .icon{color:var(--accent-text); margin-top:4px;}
.use-case p{margin:0; font-size:.95rem; font-family:var(--f-ui);}
@media (max-width:600px){.use-case-grid{grid-template-columns:1fr;}}

/* ---- Data tables — always wrap in .table-scroll so wide tables scroll inside themselves on phones ---- */
.table-scroll{overflow-x:auto; -webkit-overflow-scrolling:touch; margin:24px 0; border:1px solid var(--sage-line); border-radius:var(--radius-sm);}
.data-table{width:100%; min-width:480px; border-collapse:collapse; margin:0; font-family:var(--f-ui); font-size:.95rem;}
.data-table caption{caption-side:top; text-align:left; padding:12px 16px 4px; font-size:.85rem; color:var(--sage);}
.data-table th, .data-table td{padding:14px 16px; text-align:left; border-bottom:1px solid var(--sage-line); color:var(--ink-soft);}
.data-table thead th{font-family:var(--f-data); text-transform:uppercase; font-size:.78rem; letter-spacing:.05em; color:var(--sage); font-weight:600;}
.data-table tbody tr:last-child > *{border-bottom:none;}
.data-table tbody th{font-weight:600; color:var(--ink);}
@media (max-width:600px){.data-table{font-size:.85rem;} .data-table th, .data-table td{padding:10px 10px;}}


/* ---- Breadcrumb ---- */
.breadcrumb{font-family:var(--f-ui); font-size:.85rem; margin-bottom:14px;}
.breadcrumb ol{list-style:none; display:flex; flex-wrap:wrap; gap:6px; padding:0; margin:0;}
.breadcrumb li{color:var(--sage); font-size:.85rem; line-height:1.4;}
.breadcrumb li + li::before{content:"/"; margin-right:6px; color:var(--sage);}
.breadcrumb a{color:var(--ink-soft); text-decoration:underline; text-underline-offset:2px;}
.breadcrumb [aria-current="page"]{color:var(--sage);}

/* ---- In-text source references and source list ---- */
.cite{font-family:var(--f-ui); font-size:.8em; white-space:nowrap; text-decoration:underline; text-underline-offset:2px;}
.sources{padding-left:1.3em;}
.sources li{font-family:var(--f-ui); font-size:.9rem; margin-bottom:10px; line-height:1.55; scroll-margin-top:90px;}
.sources li:target{background:var(--frost-dim); outline:2px solid var(--vacuum); outline-offset:4px; border-radius:4px;}
.data-note, .article-body .data-note{font-family:var(--f-ui); font-size:.9rem; color:var(--ink-soft); background:var(--frost-dim); border-radius:var(--radius-sm); padding:12px 16px;}

/* ---------- Motion ---------- */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{transition-duration:.01ms !important; animation-duration:.01ms !important;}
  .js .path-card{opacity:1; transform:none;}
  .btn:hover,.path-card:hover,.related-card:hover{transform:none;}
}

/* ---------- Print ---------- */
@media print{
  .site-nav,.nav-actions,.cta-inline,.newsletter,.skip-link{display:none !important;}
  body{background:#fff; color:#000;}
  .article-body a[href^="http"]::after{content:" (" attr(href) ")"; font-size:.8em;}
}