/* =========================================================
   Coccidiosis.com — design system
   Identity: clinical veterinary "diagnostic" — spruce/teal
   trust color, Vetr-orange reserved for calls to action.
   Type: Sora (display) · IBM Plex Sans (body) · IBM Plex Mono (data)
   ========================================================= */

:root{
  --ink:        #12292E;   /* near-black spruce, primary text */
  --ink-soft:   #3B565C;   /* secondary text */
  --teal:       #0C6C74;   /* primary brand */
  --teal-deep:  #0A545A;   /* darker brand / gradients */
  --teal-tint:  #E6EFEC;   /* section tint */
  --teal-line:  #CBDDD8;   /* hairlines */
  --paper:      #F6F8F7;   /* page background */
  --white:      #FFFFFF;
  --orange:     #F26A21;   /* Vetr-aligned CTA accent */
  --orange-deep:#D8551360;
  --orange-ink: #B4470E;   /* orange text on light */
  --amber:      #F4B23E;
  --green:      #3F8F5B;   /* "safe / prevention" signal */
  --danger:     #C6492B;   /* warnings */

  --shadow-sm: 0 1px 2px rgba(18,41,46,.06), 0 2px 8px rgba(18,41,46,.05);
  --shadow-md: 0 6px 20px rgba(18,41,46,.10), 0 2px 6px rgba(18,41,46,.06);
  --shadow-lg: 0 24px 60px rgba(10,84,90,.16), 0 6px 18px rgba(18,41,46,.08);

  --radius:   14px;
  --radius-lg:22px;
  --maxw: 1140px;

  --font-display:"Sora", system-ui, sans-serif;
  --font-body:"IBM Plex Sans", system-ui, sans-serif;
  --font-mono:"IBM Plex Mono", ui-monospace, monospace;
}

/* ---------- reset ---------- */
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%; scroll-behavior:smooth}
body{
  margin:0; background:var(--paper); color:var(--ink);
  font-family:var(--font-body); font-size:17px; line-height:1.65;
  -webkit-font-smoothing:antialiased; text-rendering:optimizeLegibility;
}
img{max-width:100%; display:block; height:auto}
a{color:var(--teal-deep); text-decoration:none}
a:hover{color:var(--orange-ink)}
h1,h2,h3,h4{font-family:var(--font-display); color:var(--ink); line-height:1.12; letter-spacing:-.02em; margin:0 0 .5em; font-weight:700}
h1{font-size:clamp(2.15rem, 4.6vw, 3.5rem); font-weight:800}
h2{font-size:clamp(1.6rem, 3vw, 2.3rem)}
h3{font-size:1.25rem}
p{margin:0 0 1.1em}
strong{font-weight:600}
:focus-visible{outline:3px solid var(--orange); outline-offset:2px; border-radius:4px}

.wrap{max-width:var(--maxw); margin:0 auto; padding:0 24px}
.eyebrow{
  font-family:var(--font-mono); font-size:.72rem; letter-spacing:.22em;
  text-transform:uppercase; color:var(--teal); font-weight:500; margin:0 0 .9rem;
  display:inline-flex; align-items:center; gap:.55rem;
}
.eyebrow::before{content:""; width:26px; height:2px; background:var(--orange); display:inline-block}
.section{padding:84px 0}
.section--tint{background:var(--teal-tint)}
.section--ink{background:var(--ink); color:#DCE8E6}
.section--ink h2,.section--ink h3{color:#fff}
.lead{font-size:1.18rem; color:var(--ink-soft); max-width:60ch}
.center{text-align:center}
.center .lead{margin-left:auto; margin-right:auto}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex; align-items:center; gap:.55rem; cursor:pointer;
  font-family:var(--font-display); font-weight:600; font-size:1rem;
  padding:.82rem 1.5rem; border-radius:999px; border:2px solid transparent;
  transition:transform .12s ease, box-shadow .18s ease, background .18s ease;
  text-align:center; line-height:1;
}
.btn svg{width:1.05em; height:1.05em}
.btn--primary{background:var(--orange); color:#fff; box-shadow:0 6px 16px rgba(242,106,33,.28)}
.btn--primary:hover{background:#e35d16; color:#fff; transform:translateY(-2px); box-shadow:0 10px 22px rgba(242,106,33,.34)}
.btn--teal{background:var(--teal); color:#fff}
.btn--teal:hover{background:var(--teal-deep); color:#fff; transform:translateY(-2px)}
.btn--ghost{background:transparent; color:var(--teal-deep); border-color:var(--teal-line)}
.btn--ghost:hover{background:var(--white); border-color:var(--teal); color:var(--teal-deep); transform:translateY(-2px)}
.btn--light{background:#fff; color:var(--teal-deep)}
.btn--light:hover{background:#fff; color:var(--orange-ink); transform:translateY(-2px)}
.btn--sm{padding:.55rem 1rem; font-size:.9rem}

/* ---------- header / nav ---------- */
.site-header{position:sticky; top:0; z-index:60; background:rgba(246,248,247,.86); backdrop-filter:saturate(160%) blur(10px); border-bottom:1px solid var(--teal-line)}
.nav{display:flex; align-items:center; gap:1.4rem; height:70px}
.brand{display:flex; align-items:center; gap:.6rem; font-family:var(--font-display); font-weight:800; font-size:1.22rem; color:var(--ink); letter-spacing:-.02em}
.brand:hover{color:var(--ink)}
.brand svg{width:38px; height:38px; flex:none}
.brand .tld{color:var(--teal)}
.nav-links{display:flex; align-items:center; gap:.35rem; margin-left:auto; list-style:none; padding:0; margin-block:0}
.nav-links>li{position:relative}
.nav-links a{color:var(--ink); font-weight:500; font-size:.96rem; padding:.5rem .7rem; border-radius:8px; display:inline-block}
.nav-links a:hover{background:var(--teal-tint); color:var(--teal-deep)}
.nav-cta{margin-left:.4rem}
/* dropdown */
.has-menu>a::after{content:"▾"; font-size:.7em; margin-left:.35em; color:var(--teal)}
.submenu{
  position:absolute; top:calc(100% + 6px); left:0; min-width:230px; background:#fff;
  border:1px solid var(--teal-line); border-radius:14px; box-shadow:var(--shadow-md);
  padding:.5rem; opacity:0; visibility:hidden; transform:translateY(6px); transition:.16s ease; list-style:none; margin:0;
}
.submenu.col2{display:grid; grid-template-columns:1fr 1fr; min-width:380px; gap:.1rem}
.has-menu:hover .submenu, .has-menu:focus-within .submenu{opacity:1; visibility:visible; transform:translateY(0)}
.submenu a{display:block; padding:.5rem .7rem; border-radius:8px; font-size:.92rem; color:var(--ink-soft)}
.submenu a:hover{background:var(--teal-tint); color:var(--teal-deep)}
.submenu .grouplabel{font-family:var(--font-mono); font-size:.66rem; letter-spacing:.16em; text-transform:uppercase; color:var(--teal); padding:.5rem .7rem .2rem; grid-column:1/-1}
.nav-toggle{display:none; margin-left:auto; background:none; border:1px solid var(--teal-line); border-radius:10px; width:44px; height:40px; cursor:pointer; align-items:center; justify-content:center}
.nav-toggle span,.nav-toggle span::before,.nav-toggle span::after{content:""; display:block; width:20px; height:2px; background:var(--ink); position:relative; transition:.2s}
.nav-toggle span::before{position:absolute; top:-6px}
.nav-toggle span::after{position:absolute; top:6px}

/* ---------- hero ---------- */
.hero{position:relative; overflow:hidden; background:
   radial-gradient(1100px 480px at 78% -8%, rgba(12,108,116,.14), transparent 60%),
   radial-gradient(720px 420px at 6% 110%, rgba(242,106,33,.08), transparent 60%);
   padding:70px 0 78px}
.hero-grid{display:grid; grid-template-columns:1.05fr .95fr; gap:52px; align-items:center}
.hero h1 .hl{color:var(--teal)}
.hero .lead{margin-top:.4rem}
.hero-cta{display:flex; gap:.8rem; flex-wrap:wrap; margin-top:1.7rem}
.hero-trust{display:flex; gap:1.6rem; margin-top:2rem; flex-wrap:wrap; padding-top:1.5rem; border-top:1px solid var(--teal-line)}
.hero-trust .t{display:flex; flex-direction:column; gap:.1rem}
.hero-trust b{font-family:var(--font-display); font-size:1.5rem; color:var(--teal-deep)}
.hero-trust span{font-size:.82rem; color:var(--ink-soft)}

/* ---------- calculator ---------- */
.calc{
  background:linear-gradient(180deg,#0E7A82,#0A545A); color:#fff;
  border-radius:var(--radius-lg); box-shadow:var(--shadow-lg); overflow:hidden;
  border:1px solid rgba(255,255,255,.12);
}
.calc-head{display:flex; align-items:center; gap:.7rem; padding:1.05rem 1.4rem; border-bottom:1px solid rgba(255,255,255,.14); background:rgba(255,255,255,.05)}
.calc-head .dot{width:10px; height:10px; border-radius:50%; background:var(--amber); box-shadow:0 0 0 4px rgba(244,178,62,.22)}
.calc-head h3{color:#fff; margin:0; font-size:1.02rem; letter-spacing:-.01em}
.calc-head .tag{margin-left:auto; font-family:var(--font-mono); font-size:.62rem; letter-spacing:.14em; text-transform:uppercase; color:#BDE9E4; border:1px solid rgba(255,255,255,.22); padding:.2rem .5rem; border-radius:6px}
.calc-body{padding:1.4rem}
.calc .field{margin-bottom:1rem}
.calc label{display:block; font-family:var(--font-mono); font-size:.68rem; letter-spacing:.14em; text-transform:uppercase; color:#BDE9E4; margin-bottom:.4rem}
.calc select,.calc input[type=number]{
  width:100%; background:rgba(255,255,255,.96); color:var(--ink); border:1px solid rgba(255,255,255,.3);
  border-radius:10px; padding:.7rem .8rem; font-family:var(--font-body); font-size:1rem; font-weight:500;
}
.calc select:focus,.calc input:focus{outline:3px solid var(--amber); outline-offset:1px}
.calc .row{display:grid; grid-template-columns:1fr 96px; gap:.7rem}
.seg{display:flex; background:rgba(255,255,255,.12); border-radius:10px; padding:3px}
.seg button{flex:1; background:none; border:none; color:#DCE8E6; font-family:var(--font-body); font-weight:600; padding:.5rem; border-radius:8px; cursor:pointer; font-size:.9rem}
.seg button[aria-pressed=true]{background:#fff; color:var(--teal-deep)}
.calc .btn{width:100%; justify-content:center; margin-top:.3rem}

.calc-result{background:rgba(255,255,255,.07); border:1px dashed rgba(189,233,228,.5); border-radius:12px; padding:1.05rem 1.1rem; margin-top:1.1rem}
.calc-result[hidden]{display:none}
.calc-result .rlabel{font-family:var(--font-mono); font-size:.64rem; letter-spacing:.16em; text-transform:uppercase; color:#BDE9E4}
.calc-dose{display:flex; align-items:baseline; gap:.5rem; flex-wrap:wrap; margin:.15rem 0 .2rem}
.calc-dose .big{font-family:var(--font-mono); font-size:2rem; font-weight:600; color:#fff; letter-spacing:-.01em}
.calc-dose .vol{font-family:var(--font-mono); font-size:1.05rem; color:var(--amber)}
.calc-meta{font-size:.9rem; color:#DCE8E6; margin:.5rem 0 0}
.calc-meta b{color:#fff}
.calc-note{font-size:.82rem; color:#BDE9E4; margin-top:.55rem; line-height:1.5}
.calc-cta{display:flex; gap:.55rem; flex-wrap:wrap; margin-top:.9rem}
.calc-disclaimer{font-size:.74rem; color:#9FC9C6; padding:.9rem 1.4rem; background:rgba(0,0,0,.14); line-height:1.5}
.calc-disclaimer strong{color:#fff}

/* ---------- generic cards / grids ---------- */
.grid{display:grid; gap:22px}
.g-2{grid-template-columns:repeat(2,1fr)}
.g-3{grid-template-columns:repeat(3,1fr)}
.g-4{grid-template-columns:repeat(4,1fr)}
.card{background:#fff; border:1px solid var(--teal-line); border-radius:var(--radius); padding:1.5rem; box-shadow:var(--shadow-sm); transition:.16s ease}
.card:hover{transform:translateY(-3px); box-shadow:var(--shadow-md); border-color:var(--teal)}
.card h3{margin-bottom:.4rem}
.card p{margin:0; color:var(--ink-soft); font-size:.97rem}
.card .ic{width:46px; height:46px; border-radius:12px; background:var(--teal-tint); color:var(--teal-deep); display:flex; align-items:center; justify-content:center; margin-bottom:1rem}
.card .ic svg{width:24px; height:24px}

/* species cards */
.species-grid{display:grid; grid-template-columns:repeat(5,1fr); gap:16px}
.species{display:flex; flex-direction:column; align-items:center; gap:.5rem; background:#fff; border:1px solid var(--teal-line); border-radius:var(--radius); padding:1.1rem .6rem; text-align:center; color:var(--ink); box-shadow:var(--shadow-sm); transition:.16s}
.species:hover{transform:translateY(-4px); border-color:var(--teal); color:var(--teal-deep); box-shadow:var(--shadow-md)}
.species .emoji{font-size:2rem; line-height:1}
.species .illus{width:72px; height:72px; margin-bottom:.15rem}
.species b{font-family:var(--font-display); font-size:.98rem; font-weight:600}
.species span{font-size:.72rem; color:var(--ink-soft)}
/* species page hero illustration */
.article-head.has-illus{display:grid; grid-template-columns:88px 1fr; gap:20px; align-items:center}
.article-head .illus{width:88px; height:88px}
@media (max-width:640px){.article-head.has-illus{grid-template-columns:64px 1fr; gap:14px} .article-head .illus{width:64px;height:64px}}

/* pill / tag */
.pill{display:inline-block; font-family:var(--font-mono); font-size:.68rem; letter-spacing:.1em; text-transform:uppercase; background:var(--teal-tint); color:var(--teal-deep); padding:.28rem .6rem; border-radius:999px}
.pill--orange{background:#FCEAD9; color:var(--orange-ink)}
.pill--green{background:#E1F0E7; color:#276B43}
.pill--danger{background:#F7E2DC; color:var(--danger)}

/* ---------- article / prose ---------- */
.article{padding:52px 0 84px}
.breadcrumb{font-size:.82rem; color:var(--ink-soft); margin:0 0 1.5rem; font-family:var(--font-mono); letter-spacing:.03em}
.breadcrumb a{color:var(--teal-deep)}
.breadcrumb span{color:var(--teal-line); margin:0 .4rem}
.article-head{max-width:760px; margin-bottom:2.2rem}
.article-head h1{margin-bottom:.4rem}
.layout{display:grid; grid-template-columns:minmax(0,1fr) 300px; gap:48px; align-items:start}
.prose{max-width:none}
.prose h2{margin-top:2.2rem; padding-top:.4rem}
.prose h3{margin-top:1.6rem; color:var(--teal-deep)}
.prose ul,.prose ol{padding-left:1.2rem; margin:0 0 1.2em}
.prose li{margin-bottom:.5rem}
.prose ul li::marker{color:var(--orange)}
.prose table{width:100%; border-collapse:collapse; margin:1.2rem 0; font-size:.95rem}
.prose th,.prose td{text-align:left; padding:.7rem .8rem; border-bottom:1px solid var(--teal-line)}
.prose th{font-family:var(--font-display); font-size:.82rem; letter-spacing:.02em; text-transform:uppercase; color:var(--teal-deep); background:var(--teal-tint)}
.prose td{color:var(--ink-soft)}
.prose td strong{color:var(--ink)}

/* callouts */
.callout{border-radius:var(--radius); padding:1.15rem 1.3rem; margin:1.5rem 0; border:1px solid var(--teal-line); background:#fff; display:flex; gap:.9rem}
.callout .ci{flex:none; width:26px; height:26px; color:var(--teal)}
.callout--warn{background:#FDF4EC; border-color:#F3D3B4}
.callout--warn .ci{color:var(--orange-ink)}
.callout--vet{background:linear-gradient(180deg,#0E7A82,#0A545A); color:#fff; border:none}
.callout--vet h3{color:#fff; margin:0 0 .3rem}
.callout--vet p{color:#DCE8E6; margin:0 0 .9rem}
.callout p:last-child{margin-bottom:0}
.callout h4{margin:0 0 .25rem; font-size:1.02rem}

/* sidebar */
.aside{position:sticky; top:90px; display:flex; flex-direction:column; gap:20px}
.aside .box{background:#fff; border:1px solid var(--teal-line); border-radius:var(--radius); padding:1.2rem; box-shadow:var(--shadow-sm)}
.aside .box h4{font-size:.78rem; font-family:var(--font-mono); letter-spacing:.14em; text-transform:uppercase; color:var(--teal); margin:0 0 .8rem}
.aside .toc a{display:block; padding:.32rem 0; color:var(--ink-soft); font-size:.94rem; border-left:2px solid transparent; padding-left:.7rem}
.aside .toc a:hover{color:var(--teal-deep); border-left-color:var(--orange)}
.aside .box--cta{background:linear-gradient(180deg,#0E7A82,#0A545A); color:#fff; border:none}
.aside .box--cta h4{color:#BDE9E4}
.aside .box--cta p{font-size:.92rem; color:#DCE8E6; margin:0 0 1rem}

/* mini calculator embed on inner pages */
.calc--embed{max-width:none}

/* ---------- FAQ ---------- */
.faq-item{background:#fff; border:1px solid var(--teal-line); border-radius:var(--radius); margin-bottom:12px; overflow:hidden}
.faq-item summary{cursor:pointer; list-style:none; padding:1.05rem 1.3rem; font-family:var(--font-display); font-weight:600; font-size:1.05rem; display:flex; align-items:center; gap:.8rem; color:var(--ink)}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+"; margin-left:auto; font-size:1.5rem; color:var(--teal); font-weight:400; line-height:1}
.faq-item[open] summary::after{content:"–"}
.faq-item summary:hover{color:var(--teal-deep)}
.faq-item .a{padding:0 1.3rem 1.2rem 1.3rem; color:var(--ink-soft)}
.faq-item .a p:last-child{margin-bottom:0}

/* ---------- CTA band ---------- */
.ctaband{background:
   radial-gradient(700px 300px at 85% 0%, rgba(242,106,33,.16), transparent 60%),
   linear-gradient(180deg,#0B4A50,#0A545A);
   color:#fff; border-radius:var(--radius-lg); padding:52px; text-align:center; box-shadow:var(--shadow-lg)}
.ctaband h2{color:#fff; max-width:20ch; margin-inline:auto}
.ctaband p{color:#CDE3E1; max-width:52ch; margin:.6rem auto 1.6rem}
.ctaband .btns{display:flex; gap:.8rem; justify-content:center; flex-wrap:wrap}
.partner-tag{font-family:var(--font-mono); font-size:.7rem; letter-spacing:.18em; text-transform:uppercase; color:#BDE9E4; margin-bottom:1rem; display:inline-block}

/* ---------- footer ---------- */
.site-footer{background:var(--ink); color:#AEC4C2; padding:64px 0 28px; font-size:.94rem}
.footer-grid{display:grid; grid-template-columns:1.6fr 1fr 1fr 1fr; gap:36px; padding-bottom:36px; border-bottom:1px solid rgba(255,255,255,.1)}
.footer-grid h5{font-family:var(--font-mono); font-size:.7rem; letter-spacing:.16em; text-transform:uppercase; color:#7FA6A4; margin:0 0 1rem}
.footer-grid a{color:#C9DAD8; display:block; padding:.28rem 0}
.footer-grid a:hover{color:#fff}
.footer-brand .brand{color:#fff; margin-bottom:1rem}
.footer-brand .brand .tld{color:var(--amber)}
.footer-brand p{max-width:38ch; color:#9FBAB8}
.footer-partner{display:inline-flex; align-items:center; gap:.5rem; margin-top:1rem; background:rgba(255,255,255,.06); border:1px solid rgba(255,255,255,.12); border-radius:999px; padding:.4rem .9rem; font-size:.85rem; color:#DCE8E6}
.footer-partner b{color:var(--orange); font-weight:700}
.footer-bottom{display:flex; justify-content:space-between; gap:1rem; flex-wrap:wrap; padding-top:22px; color:#7FA6A4; font-size:.82rem}
.footer-bottom a{color:#9FBAB8}
.disclaimer-strip{background:#0C1F23; color:#7FA6A4; font-size:.78rem; padding:14px 0; text-align:center; line-height:1.5}

/* ---------- utilities ---------- */
.mt0{margin-top:0}.mb0{margin-bottom:0}
.stack>*+*{margin-top:1rem}
.hr{height:1px; background:var(--teal-line); border:0; margin:0}
.sr-only{position:absolute; width:1px; height:1px; padding:0; margin:-1px; overflow:hidden; clip:rect(0,0,0,0); white-space:nowrap; border:0}

/* ---------- responsive ---------- */
@media (max-width:960px){
  .hero-grid{grid-template-columns:1fr; gap:36px}
  .layout{grid-template-columns:1fr}
  .aside{position:static}
  .g-4{grid-template-columns:repeat(2,1fr)}
  .g-3{grid-template-columns:repeat(2,1fr)}
  .species-grid{grid-template-columns:repeat(4,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
  .nav-links{
    position:fixed; inset:70px 0 auto 0; flex-direction:column; align-items:stretch; gap:0;
    background:var(--paper); border-bottom:1px solid var(--teal-line); padding:12px 24px 20px;
    box-shadow:var(--shadow-md); display:none;
  }
  .nav-links.open{display:flex}
  .nav-links a{padding:.7rem .2rem; font-size:1.02rem; border-radius:8px}
  .submenu{position:static; opacity:1; visibility:visible; transform:none; box-shadow:none; border:none; background:transparent; padding:.2rem 0 .6rem 1rem; min-width:0}
  .submenu.col2{display:block; min-width:0}
  .has-menu>a::after{display:none}
  .nav-cta{margin:.6rem 0 0}
  .nav-toggle{display:flex}
}
@media (max-width:640px){
  body{font-size:16px}
  .section{padding:60px 0}
  .g-4,.g-3,.g-2{grid-template-columns:1fr}
  .species-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr}
  .ctaband{padding:36px 22px}
  .hero-trust{gap:1.1rem}
  .calc .row{grid-template-columns:1fr 84px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important; transition:none !important; scroll-behavior:auto !important}
}