/* ============================================================
   loam — Fiber Tracker: Eat 30 Plants
   Shared design system for the marketing site + guides.
   Palette + type mirror the iOS app (calm, organic, pastel).
   ============================================================ */

/* ---------- Fonts ---------- */
/* Fraunces = the app's elegant high-contrast serif (display).
   System sans for UI/body text. */

/* ---------- Reset ---------- */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
img,svg{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button{font:inherit;cursor:pointer;border:none;background:none}
ul{list-style:none}

/* ---------- Tokens ---------- */
:root{
  /* greens */
  --green-950:#1c2c22;
  --green-900:#23372a;
  --green-800:#2e4a3a;
  --green-700:#3b5e49;
  --green-600:#4a6b56;
  --sage-500:#8ca57d;
  --sage-400:#a6bd98;
  --sage-200:#cdd9c1;
  --sage-100:#e2ead9;
  /* fiber-type accents (from the app) */
  --teal:#3e8e9a;      /* soluble */
  --gold:#b5813c;      /* insoluble */
  --purple:#7b6ba8;    /* prebiotic */
  --terracotta:#c56a3f;/* warm accent */
  --terracotta-soft:#e5b79c;
  /* neutrals / paper */
  --cream:#f3f1e6;
  --cream-card:#faf8ef;
  --paper:#f7f5ec;
  --ink:#2b3a2f;
  --ink-soft:#46543f;
  --muted:#77826f;
  --line:#e4e2d3;
  --white:#ffffff;
  /* type */
  --serif:"Fraunces",Georgia,"Times New Roman",serif;
  --sans:-apple-system,BlinkMacSystemFont,"Segoe UI",Inter,Roboto,Helvetica,Arial,sans-serif;
  /* layout */
  --wrap:1120px;
  --wrap-narrow:760px;
  --radius:20px;
  --radius-lg:28px;
  --radius-sm:12px;
  --shadow-sm:0 2px 8px rgba(35,55,42,.06);
  --shadow:0 12px 40px rgba(35,55,42,.10);
  --shadow-lg:0 30px 80px rgba(35,55,42,.16);
  --pad:clamp(20px,5vw,28px);
}

/* ---------- Base ---------- */
body{
  font-family:var(--sans);
  color:var(--ink);
  background:var(--cream);
  line-height:1.62;
  font-size:1.0625rem;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
.wrap{width:100%;max-width:var(--wrap);margin-inline:auto;padding-inline:var(--pad)}
.narrow{max-width:var(--wrap-narrow)}
section{position:relative}

/* ---------- Typography ---------- */
h1,h2,h3,h4{font-family:var(--serif);font-weight:500;color:var(--green-900);line-height:1.08;letter-spacing:-.01em}
h1{font-size:clamp(2.6rem,6.4vw,4.6rem);font-weight:400}
h2{font-size:clamp(2rem,4.4vw,3.1rem)}
h3{font-size:clamp(1.35rem,2.4vw,1.7rem);line-height:1.2}
h4{font-size:1.15rem;line-height:1.3}
.eyebrow{font-family:var(--sans);font-weight:600;font-size:.8rem;letter-spacing:.14em;text-transform:uppercase;color:var(--green-600)}
.lead{font-size:clamp(1.1rem,1.9vw,1.32rem);color:var(--ink-soft);line-height:1.6}
.serif-italic{font-family:var(--serif);font-style:italic}
strong{color:var(--green-800);font-weight:600}
mark{background:linear-gradient(transparent 58%,var(--sage-200) 58%);color:inherit;padding:0 .05em}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.55em;
  font-family:var(--sans);font-weight:600;font-size:1rem;
  padding:.95em 1.6em;border-radius:999px;
  transition:transform .18s ease,box-shadow .18s ease,background .18s ease;
  will-change:transform;white-space:nowrap;
}
.btn-primary{background:var(--green-800);color:#f4f2e7;box-shadow:var(--shadow)}
.btn-primary:hover{background:var(--green-900);transform:translateY(-2px);box-shadow:var(--shadow-lg)}
.btn-ghost{background:rgba(46,74,58,.06);color:var(--green-800)}
.btn-ghost:hover{background:rgba(46,74,58,.12)}
.btn-lg{font-size:1.08rem;padding:1.05em 2em}

/* App Store badge button */
.appstore{
  display:inline-flex;align-items:center;gap:.7rem;
  background:var(--green-900);color:#f4f2e7;
  padding:.7rem 1.35rem;border-radius:16px;box-shadow:var(--shadow);
  transition:transform .18s ease,box-shadow .18s ease;
}
.appstore:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg)}
.appstore svg{width:26px;height:26px;flex:none}
.appstore .as-txt{display:flex;flex-direction:column;line-height:1.05;text-align:left}
.appstore .as-txt small{font-size:.66rem;opacity:.82;letter-spacing:.02em}
.appstore .as-txt span{font-size:1.18rem;font-weight:600;font-family:var(--sans)}

/* ---------- Nav ---------- */
.nav{position:sticky;top:0;z-index:50;background:rgba(243,241,230,.82);backdrop-filter:saturate(150%) blur(14px);border-bottom:1px solid rgba(228,226,211,.7)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:66px}
.brand{display:flex;align-items:center;gap:.6rem;font-family:var(--serif);font-size:1.35rem;color:var(--green-900);font-weight:500}
.brand img{width:34px;height:34px;border-radius:9px;box-shadow:var(--shadow-sm)}
.nav-links{display:flex;align-items:center;gap:1.6rem}
.nav-links a{font-size:.95rem;font-weight:500;color:var(--ink-soft);transition:color .15s}
.nav-links a:hover{color:var(--green-800)}
.nav-cta{margin-left:.4rem}
/* keep the button label light — .nav-links a would otherwise win on specificity */
.nav-links a.nav-cta,.nav-links a.nav-cta:hover{color:#f4f2e7}
@media(max-width:820px){.nav-links a:not(.nav-cta){display:none}}

/* ---------- Hero ---------- */
.hero{
  background:
    radial-gradient(120% 90% at 50% -10%, var(--sage-100) 0%, rgba(226,234,217,0) 55%),
    linear-gradient(178deg,#e2ead9 0%,#eef0e2 42%,#f4ede0 100%);
  padding:clamp(48px,8vw,96px) 0 clamp(40px,6vw,72px);
  overflow:hidden;
}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:clamp(28px,5vw,60px);align-items:center}
.hero-badge{display:inline-flex;align-items:center;gap:.5rem;background:rgba(255,255,255,.6);border:1px solid rgba(140,165,125,.35);color:var(--green-700);font-weight:600;font-size:.82rem;padding:.42rem .9rem;border-radius:999px;margin-bottom:1.4rem}
.hero-badge .dot{width:8px;height:8px;border-radius:50%;background:var(--terracotta)}
.hero h1{margin-bottom:1.1rem}
.hero h1 .accent{font-style:italic;color:var(--green-700)}
.hero .lead{margin-bottom:1.9rem;max-width:36ch}
.hero-actions{display:flex;flex-wrap:wrap;align-items:center;gap:1rem;margin-bottom:1.5rem}
.hero-trust{display:flex;flex-wrap:wrap;gap:1.1rem;color:var(--muted);font-size:.9rem;font-weight:500}
.hero-trust span{display:inline-flex;align-items:center;gap:.4rem}
.hero-trust svg{width:16px;height:16px;color:var(--sage-500)}
.hero-visual{position:relative;display:flex;justify-content:center;align-items:center}
.hero-phone{width:min(340px,82%);filter:drop-shadow(0 40px 70px rgba(35,55,42,.28));border-radius:44px}
.hero-glow{position:absolute;inset:6% 12%;background:radial-gradient(closest-side,rgba(140,165,125,.35),transparent 72%);filter:blur(20px);z-index:0}
.hero-visual .hero-phone{position:relative;z-index:1}
@media(max-width:860px){
  .hero-grid{grid-template-columns:1fr;text-align:center}
  .hero .lead{margin-inline:auto}
  .hero-actions,.hero-trust{justify-content:center}
  .hero-visual{order:-1;margin-bottom:1rem}
}

/* stat strip */
.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:clamp(14px,3vw,26px);margin-top:clamp(38px,6vw,60px)}
.stat{background:var(--cream-card);border:1px solid var(--line);border-radius:var(--radius);padding:clamp(18px,3vw,26px);box-shadow:var(--shadow-sm)}
.stat .num{font-family:var(--serif);font-size:clamp(2rem,4vw,2.9rem);color:var(--green-800);line-height:1}
.stat .num .unit{font-size:.5em;color:var(--muted)}
.stat p{margin-top:.5rem;font-size:.92rem;color:var(--ink-soft)}
@media(max-width:620px){.stats{grid-template-columns:1fr}}

/* ---------- Section scaffolding ---------- */
.section{padding:clamp(56px,9vw,104px) 0}
.section-head{max-width:640px;margin-bottom:clamp(32px,5vw,54px)}
.section-head.center{margin-inline:auto;text-align:center}
.section-head .eyebrow{display:block;margin-bottom:.9rem}
.section-head p{margin-top:1rem;color:var(--ink-soft);font-size:1.08rem}
.tint{background:linear-gradient(180deg,var(--paper),#f1efe2)}
.tint-green{background:var(--green-800);color:#e7ece1}
.tint-green h2,.tint-green h3{color:#f2f3ea}
.tint-green .eyebrow{color:var(--sage-400)}
.tint-green .lead,.tint-green p{color:#cdd6c6}

/* ---------- Screenshots gallery ---------- */
.shots{display:flex;gap:clamp(16px,3vw,28px);overflow-x:auto;padding:8px 4px 22px;scroll-snap-type:x mandatory;-webkit-overflow-scrolling:touch}
.shots::-webkit-scrollbar{height:8px}
.shots::-webkit-scrollbar-thumb{background:var(--sage-200);border-radius:8px}
.shot{scroll-snap-align:center;flex:0 0 auto;width:min(258px,66vw);text-align:center}
.shot img{width:100%;border-radius:34px;box-shadow:var(--shadow-lg);border:1px solid rgba(35,55,42,.06)}
.shot figcaption{margin-top:1rem;font-family:var(--serif);font-size:1.12rem;color:var(--green-800);font-style:italic}
.shot .sub{font-family:var(--sans);font-style:normal;font-size:.85rem;color:var(--muted);margin-top:.2rem}

/* ---------- How it works ---------- */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:clamp(18px,3vw,30px);counter-reset:step}
.step{background:var(--cream-card);border:1px solid var(--line);border-radius:var(--radius-lg);padding:clamp(24px,3vw,34px);box-shadow:var(--shadow-sm);position:relative}
.step::before{counter-increment:step;content:"0" counter(step);font-family:var(--serif);font-size:2.4rem;color:var(--sage-400);line-height:1;display:block;margin-bottom:1rem}
.step h3{margin-bottom:.5rem}
.step p{color:var(--ink-soft);font-size:.98rem}
@media(max-width:800px){.steps{grid-template-columns:1fr}}

/* ---------- Feature split rows ---------- */
.feature-row{display:grid;grid-template-columns:1fr 1fr;gap:clamp(28px,5vw,64px);align-items:center;padding:clamp(30px,5vw,54px) 0}
.feature-row.rev .feature-media{order:2}
.feature-media{display:flex;justify-content:center}
.feature-media img{width:min(300px,80%);border-radius:34px;box-shadow:var(--shadow-lg)}
.feature-copy h3{margin-bottom:.8rem}
.feature-copy p{color:var(--ink-soft)}
.pill-row{display:flex;flex-wrap:wrap;gap:.5rem;margin-top:1.2rem}
.pill{display:inline-flex;align-items:center;gap:.45rem;font-size:.85rem;font-weight:600;padding:.4rem .8rem;border-radius:999px;background:var(--paper);border:1px solid var(--line);color:var(--ink-soft)}
.pill .dot{width:8px;height:8px;border-radius:50%}
.dot.sol{background:var(--teal)}.dot.insol{background:var(--gold)}.dot.pre{background:var(--purple)}
@media(max-width:800px){.feature-row{grid-template-columns:1fr;gap:22px}.feature-row.rev .feature-media{order:0}}

/* ---------- Guides grid ---------- */
.guide-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:clamp(16px,2.5vw,22px)}
.guide-card{display:flex;flex-direction:column;background:var(--cream-card);border:1px solid var(--line);border-radius:var(--radius);padding:clamp(22px,3vw,28px);box-shadow:var(--shadow-sm);transition:transform .2s ease,box-shadow .2s ease}
.guide-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.guide-card .tag{font-size:.75rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--terracotta);margin-bottom:.7rem}
.guide-card h3{font-size:1.28rem;margin-bottom:.55rem}
.guide-card p{color:var(--ink-soft);font-size:.95rem;flex:1}
.guide-card .more{margin-top:1.1rem;font-weight:600;color:var(--green-700);display:inline-flex;align-items:center;gap:.4rem}
.guide-card:hover .more{gap:.7rem}

/* ---------- FAQ ---------- */
.faq{max-width:820px;margin-inline:auto}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{width:100%;display:flex;align-items:flex-start;justify-content:space-between;gap:1.2rem;padding:1.35rem .2rem;text-align:left;font-family:var(--serif);font-size:clamp(1.1rem,2vw,1.32rem);color:var(--green-900)}
.faq-q .ico{flex:none;width:26px;height:26px;border-radius:50%;background:var(--sage-100);color:var(--green-700);display:grid;place-items:center;font-size:1.2rem;transition:transform .25s ease,background .2s;margin-top:.15rem}
.faq-item[open] .faq-q .ico{transform:rotate(45deg);background:var(--green-800);color:#f2f3ea}
.faq-a{padding:0 .2rem 1.5rem;color:var(--ink-soft);max-width:70ch}
.faq-a a.learn{display:inline-flex;align-items:center;gap:.35rem;margin-top:.7rem;font-weight:600;color:var(--terracotta)}
.faq-a a.learn:hover{gap:.6rem}
details>summary{list-style:none;cursor:pointer}
details>summary::-webkit-details-marker{display:none}

/* ---------- CTA band ---------- */
.cta{background:
    radial-gradient(90% 120% at 80% 10%, rgba(140,165,125,.22),transparent 60%),
    linear-gradient(160deg,var(--green-800),var(--green-950));
  color:#eef1e8;border-radius:var(--radius-lg);padding:clamp(40px,6vw,72px);text-align:center;box-shadow:var(--shadow-lg);position:relative;overflow:hidden}
.cta h2{color:#f4f5ec;margin-bottom:1rem}
.cta p{color:#c9d3c2;max-width:46ch;margin:0 auto 2rem;font-size:1.1rem}
.cta .hero-trust{justify-content:center;color:#a9b7a2}
.cta .hero-trust svg{color:var(--sage-400)}
.cta-leaf{position:absolute;font-size:12rem;opacity:.06;right:-2rem;bottom:-3rem;transform:rotate(-12deg)}

/* ---------- Footer ---------- */
.footer{background:var(--green-950);color:#b9c4b1;padding:clamp(44px,6vw,68px) 0 2.4rem;font-size:.94rem}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:clamp(24px,4vw,40px)}
.footer .brand{color:#eef1e8;margin-bottom:.9rem}
.footer p{color:#93a08c;max-width:34ch}
.footer h4{color:#dfe6d8;font-family:var(--sans);font-size:.8rem;letter-spacing:.1em;text-transform:uppercase;margin-bottom:1rem}
.footer li{margin-bottom:.6rem}
.footer a:hover{color:#eef1e8}
.footer-bottom{margin-top:clamp(30px,5vw,48px);padding-top:1.6rem;border-top:1px solid rgba(255,255,255,.09);display:flex;flex-wrap:wrap;justify-content:space-between;gap:1rem;color:#7f8c78;font-size:.85rem}
@media(max-width:760px){.footer-grid{grid-template-columns:1fr 1fr}}
@media(max-width:460px){.footer-grid{grid-template-columns:1fr}}

/* ---------- Prose (guide articles) ---------- */
.article{padding:clamp(30px,5vw,56px) 0 clamp(50px,7vw,90px)}
.breadcrumb{font-size:.85rem;color:var(--muted);margin-bottom:1.4rem;display:flex;gap:.5rem;flex-wrap:wrap}
.breadcrumb a:hover{color:var(--green-700)}
.article-head{max-width:var(--wrap-narrow);margin-bottom:2.2rem}
.article-head .tag{font-size:.78rem;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--terracotta);margin-bottom:1rem;display:block}
.article-head h1{font-size:clamp(2.1rem,4.6vw,3.2rem);margin-bottom:1rem}
.article-head .lead{max-width:60ch}
.article-meta{margin-top:1.3rem;font-size:.88rem;color:var(--muted);display:flex;gap:1rem;flex-wrap:wrap}
.prose{max-width:var(--wrap-narrow)}
.prose h2{font-size:clamp(1.6rem,3vw,2.1rem);margin:2.4rem 0 .9rem}
.prose h3{margin:1.8rem 0 .6rem}
.prose p{margin-bottom:1.15rem;color:var(--ink-soft)}
.prose ul,.prose ol{margin:0 0 1.3rem 1.2rem}
.prose ul li{list-style:disc;margin-bottom:.55rem;padding-left:.25rem}
.prose ol li{list-style:decimal;margin-bottom:.55rem;padding-left:.25rem}
.prose a{color:var(--green-700);text-decoration:underline;text-underline-offset:2px;text-decoration-color:var(--sage-400)}
.prose a:hover{text-decoration-color:var(--green-700)}
.prose>p:first-of-type::first-letter{}
.callout{background:var(--sage-100);border:1px solid var(--sage-200);border-left:4px solid var(--sage-500);border-radius:var(--radius-sm);padding:1.2rem 1.4rem;margin:1.8rem 0}
.callout strong{color:var(--green-800)}
.app-box{background:linear-gradient(160deg,var(--green-800),var(--green-900));color:#e9ede3;border-radius:var(--radius);padding:clamp(24px,3vw,34px);margin:2.2rem 0;box-shadow:var(--shadow)}
.app-box .eyebrow{color:var(--sage-400)}
.app-box h3{color:#f3f4ea;margin:.6rem 0 .7rem}
.app-box p{color:#cdd6c6;margin-bottom:1.2rem}
.app-box .btn-primary{background:#f4f2e7;color:var(--green-900)}
.app-box .btn-primary:hover{background:#fff}

/* data table */
.tbl-wrap{overflow-x:auto;margin:1.6rem 0;border:1px solid var(--line);border-radius:var(--radius-sm)}
table{width:100%;border-collapse:collapse;font-size:.95rem;min-width:420px;background:var(--cream-card)}
th,td{text-align:left;padding:.75rem 1rem;border-bottom:1px solid var(--line)}
thead th{background:var(--paper);font-family:var(--sans);font-weight:700;color:var(--green-800);font-size:.82rem;letter-spacing:.03em;text-transform:uppercase}
tbody tr:last-child td{border-bottom:none}
td .fnum{font-family:var(--serif);color:var(--green-800);font-weight:600}

/* related / next */
.related{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:16px;margin-top:1.4rem}
.related a{background:var(--cream-card);border:1px solid var(--line);border-radius:var(--radius-sm);padding:1.1rem 1.2rem;transition:transform .18s,box-shadow .18s}
.related a:hover{transform:translateY(-3px);box-shadow:var(--shadow-sm)}
.related .tag{font-size:.72rem;font-weight:700;text-transform:uppercase;letter-spacing:.07em;color:var(--terracotta)}
.related strong{display:block;margin-top:.35rem;color:var(--green-900);font-family:var(--serif);font-weight:500;font-size:1.05rem}

/* utilities */
.center{text-align:center}
.mt-0{margin-top:0}
.divider-leaf{display:flex;align-items:center;justify-content:center;gap:1rem;color:var(--sage-400);margin:0 auto}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);border:0}
:focus-visible{outline:3px solid var(--sage-500);outline-offset:2px;border-radius:6px}

@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important;animation:none!important}}