/* Top 100 Preps — shared styles for every page.
   Palette: change the four colors below to re-theme the whole site. */
:root{
  --bg:#FAFAF8;        /* page background */
  --surface:#FFFFFF;   /* cards */
  --text:#141414;      /* body text */
  --muted:#5E5E5A;     /* secondary text */
  --line:#E4E4DF;      /* borders */
  --accent:#2F5D50;    /* buttons, links, active filter */
  --accent-ink:#FFFFFF;
  --radius:10px;
  --max:1160px;
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;}
body{background:var(--bg);color:var(--text);font-family:var(--font);font-size:17px;line-height:1.6;-webkit-font-smoothing:antialiased;}
a{color:var(--accent);}
img{max-width:100%;display:block;}
.wrap{max-width:var(--max);margin:0 auto;padding:0 24px;}

/* ---------- Header ---------- */
.site-header{position:sticky;top:0;z-index:50;background:rgba(250,250,248,0.94);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-bottom:1px solid var(--line);}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;height:64px;}
.brand{font-weight:800;font-size:1.15rem;letter-spacing:-0.02em;color:var(--text);text-decoration:none;}
.brand span{color:var(--accent);}
.nav{display:flex;align-items:center;gap:28px;list-style:none;}
.nav a{color:var(--muted);text-decoration:none;font-size:0.95rem;font-weight:600;}
.nav a:hover,.nav a[aria-current="page"]{color:var(--text);}
.nav .btn{color:var(--accent-ink);}
.menu-btn{display:none;width:44px;height:44px;border:1px solid var(--line);border-radius:8px;background:var(--surface);color:var(--text);cursor:pointer;align-items:center;justify-content:center;}
.mobile-menu{display:none;}

/* ---------- Buttons ---------- */
.btn{display:inline-block;background:var(--accent);color:var(--accent-ink);text-decoration:none;font-weight:700;font-size:0.95rem;padding:11px 20px;border-radius:8px;border:1px solid var(--accent);transition:opacity .15s;}
.btn:hover{opacity:.88;}
.btn-outline{background:transparent;color:var(--text);border-color:var(--line);}
.btn-outline:hover{border-color:var(--text);opacity:1;}

/* ---------- Hero ---------- */
.hero{padding:72px 0 48px;border-bottom:1px solid var(--line);}
.eyebrow{font-size:0.8rem;font-weight:700;letter-spacing:0.08em;text-transform:uppercase;color:var(--accent);margin-bottom:14px;}
.hero h1{font-size:clamp(2rem,5vw,3.4rem);line-height:1.08;letter-spacing:-0.03em;font-weight:800;max-width:18ch;}
.hero p{color:var(--muted);font-size:1.1rem;max-width:56ch;margin:18px 0 28px;}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;}

/* ---------- Section headings ---------- */
.section{padding:48px 0 64px;}
.section-head{display:flex;align-items:baseline;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-bottom:20px;}
.section-head h2{font-size:1.6rem;letter-spacing:-0.02em;}
.count{color:var(--muted);font-size:0.9rem;}

/* ---------- Category filter ---------- */
.filters{position:sticky;top:64px;z-index:40;background:var(--bg);display:flex;gap:8px;overflow-x:auto;scrollbar-width:none;padding:12px 0;margin-bottom:20px;border-bottom:1px solid var(--line);}
.filters::-webkit-scrollbar{display:none;}
.chip{flex:none;font:inherit;font-size:0.88rem;font-weight:600;padding:7px 14px;border-radius:999px;border:1px solid var(--line);background:var(--surface);color:var(--text);cursor:pointer;white-space:nowrap;}
.chip:hover{border-color:var(--text);}
.chip.active{background:var(--text);border-color:var(--text);color:#fff;}

/* ---------- Product grid ---------- */
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:16px;}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);display:flex;flex-direction:column;overflow:hidden;}
.card-media{aspect-ratio:4/3;background:#F1F1EE;display:flex;align-items:center;justify-content:center;border-bottom:1px solid var(--line);}
.card-media img{width:100%;height:100%;object-fit:contain;padding:16px;background:#fff;}
.card-media .mono{font-size:0.75rem;font-weight:700;letter-spacing:0.1em;text-transform:uppercase;color:var(--muted);}
.card-body{padding:16px;display:flex;flex-direction:column;gap:6px;flex:1;}
.card-meta{display:flex;justify-content:space-between;font-size:0.75rem;font-weight:700;letter-spacing:0.06em;text-transform:uppercase;color:var(--muted);}
.card h3{font-size:1.02rem;line-height:1.3;letter-spacing:-0.01em;}
.card p{color:var(--muted);font-size:0.9rem;line-height:1.5;flex:1;}
.card .btn{margin-top:10px;text-align:center;padding:10px 14px;}

/* ---------- Signup / disclosure / footer ---------- */
.signup{border-top:1px solid var(--line);padding:56px 0;text-align:center;}
.signup h2{font-size:1.5rem;letter-spacing:-0.02em;}
.signup p{color:var(--muted);margin:8px 0 20px;}
.signup form{display:flex;gap:8px;justify-content:center;flex-wrap:wrap;max-width:460px;margin:0 auto;}
.signup input[type="email"]{flex:1;min-width:220px;font:inherit;padding:11px 14px;border:1px solid var(--line);border-radius:8px;background:var(--surface);}
.signup button{font:inherit;cursor:pointer;}
.signup .thanks{display:none;color:var(--accent);font-weight:700;}
.disclosure{border-top:1px solid var(--line);padding:20px 0;font-size:0.82rem;color:var(--muted);text-align:center;}
.site-footer{border-top:1px solid var(--line);padding:32px 0 48px;font-size:0.88rem;color:var(--muted);}
.site-footer .wrap{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;}
.site-footer nav{display:flex;gap:20px;flex-wrap:wrap;}
.site-footer a{color:var(--muted);text-decoration:none;}
.site-footer a:hover{color:var(--text);}

/* ---------- Guides index ---------- */
.guide-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:16px;}
.guide-card{display:block;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:22px;text-decoration:none;color:var(--text);}
.guide-card:hover{border-color:var(--text);}
.guide-card .tag{font-size:0.75rem;font-weight:700;letter-spacing:0.08em;text-transform:uppercase;color:var(--accent);}
.guide-card h3{font-size:1.15rem;margin:6px 0;letter-spacing:-0.01em;}
.guide-card p{color:var(--muted);font-size:0.92rem;}

/* ---------- Articles & plain pages ---------- */
.prose{max-width:720px;margin:0 auto;padding:56px 24px 64px;}
.prose .crumbs{font-size:0.85rem;color:var(--muted);margin-bottom:16px;}
.prose .crumbs a{color:var(--muted);}
.prose h1{font-size:clamp(1.9rem,4.5vw,2.7rem);line-height:1.12;letter-spacing:-0.03em;margin-bottom:12px;}
.prose .byline{color:var(--muted);font-size:0.9rem;margin-bottom:32px;}
.prose h2{font-size:1.4rem;letter-spacing:-0.02em;margin:40px 0 12px;}
.prose h3{font-size:1.1rem;margin:28px 0 8px;}
.prose p,.prose ul,.prose ol{margin-bottom:16px;}
.prose ul,.prose ol{padding-left:22px;}
.prose li{margin-bottom:6px;}
.callout{border-left:3px solid var(--accent);background:var(--surface);padding:14px 18px;border-radius:0 8px 8px 0;margin:24px 0;}
.pick{display:flex;gap:16px;align-items:center;justify-content:space-between;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:16px 18px;margin:12px 0;}
.pick strong{display:block;}
.pick span{color:var(--muted);font-size:0.9rem;}
.pick .btn{flex:none;}
.table-scroll{overflow-x:auto;margin:16px 0 24px;}
.table-scroll table{min-width:560px;}
table{width:100%;border-collapse:collapse;font-size:0.92rem;}
th,td{text-align:left;padding:10px 12px;border-bottom:1px solid var(--line);vertical-align:top;}
th{font-size:0.78rem;letter-spacing:0.06em;text-transform:uppercase;color:var(--muted);}
.sources{font-size:0.88rem;color:var(--muted);border-top:1px solid var(--line);margin-top:40px;padding-top:20px;}

/* ---------- Category sections (homepage) ---------- */
.cat-nav{position:sticky;top:64px;z-index:40;background:rgba(250,250,248,0.96);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-bottom:1px solid var(--line);}
.cat-nav-inner{display:flex;gap:8px;overflow-x:auto;scrollbar-width:none;padding:12px 0;}
.cat-nav-inner::-webkit-scrollbar{display:none;}
.cat-nav a{flex:none;font-size:0.88rem;font-weight:600;padding:7px 14px;border-radius:999px;border:1px solid var(--line);background:var(--surface);color:var(--text);text-decoration:none;white-space:nowrap;}
.cat-nav a:hover{border-color:var(--text);}
.cat-nav a.active{background:var(--text);border-color:var(--text);color:#fff;}
.cat-nav a span{color:var(--muted);font-weight:500;margin-left:4px;}
.cat-nav a.active span{color:rgba(255,255,255,0.7);}
.cat-section{padding:48px 0 16px;scroll-margin-top:124px;}
.cat-section + .cat-section{border-top:1px solid var(--line);}
.cat-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-bottom:20px;}
.cat-head h2{font-size:1.6rem;letter-spacing:-0.02em;}
.cat-head p{color:var(--muted);max-width:62ch;margin-top:6px;}
.cat-head .count{white-space:nowrap;}
.cat-sections-end{height:32px;}

/* ---------- Phones ---------- */
@media (max-width:768px){
  .nav{display:none;}
  .menu-btn{display:inline-flex;}
  .mobile-menu{position:fixed;top:64px;left:0;right:0;z-index:49;background:var(--bg);border-bottom:1px solid var(--line);padding:8px 24px 20px;flex-direction:column;}
  .mobile-menu:not([hidden]){display:flex;}
  .mobile-menu a{padding:14px 0;border-bottom:1px solid var(--line);color:var(--text);text-decoration:none;font-weight:600;font-size:1.05rem;}
  .mobile-menu a[aria-current="page"]{color:var(--accent);}
  .mobile-menu .btn{margin-top:16px;border-bottom:none;text-align:center;color:var(--accent-ink);}
  .hero{padding:48px 0 36px;}
  .hero-actions .btn{flex:1;text-align:center;}
  .cat-section{padding:36px 0 8px;}
  .cat-head h2{font-size:1.35rem;}
}
@media (max-width:600px){
  body{font-size:16px;}
  .wrap{padding:0 16px;}
  .grid{grid-template-columns:1fr 1fr;gap:10px;}
  .card-body{padding:12px;}
  .card p{display:none;}
  .card h3{font-size:0.92rem;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;}
  .card .btn{font-size:0.85rem;padding:9px 8px;margin-top:auto;}
  .card h3{margin-bottom:6px;}
  .pick{flex-direction:column;align-items:stretch;}
  .pick .btn{text-align:center;}
  .prose{padding:36px 16px 48px;}
}