/* ============================================================
   PetSymptoms — Foundation stylesheet (2026 rebrand)
   Shared by every redesigned page: nav, footer, tokens, buttons,
   disclaimer/trust components. Page-specific layout lives in
   home.css / glossary.css / content.css so each template can
   evolve independently without touching this file.
   ============================================================ */
:root{
    --primary:#0f442d;--primary-light:#1c6b45;--primary-dark:#0a2e1e;--primary-container:#d9ecdf;
    --secondary:#25667b;--secondary-container:#dcf0ea;
    --surface:#ffffff;--surface-alt:#f7f6f2;--surface-container:#eef2ee;
    --on-surface:#161a17;--on-surface-variant:#57615a;
    --outline:#e1e5e0;--outline-strong:#c7cdc7;
    --danger:#c02c2c;--danger-bg:#fdecec;--danger-border:#f2c2c0;

    --display:'Fraunces', serif;
    --sans:'Source Sans 3', sans-serif;
    --mono:'IBM Plex Mono', monospace;

    --container:1180px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:var(--sans);background:var(--surface);color:var(--on-surface);line-height:1.6;font-size:16px}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
ul{list-style:none}
h1,h2,h3,h4{font-family:var(--sans);font-weight:700;color:var(--on-surface);line-height:1.2}
.wrap{max-width:var(--container);margin:0 auto;padding:0 2rem}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px}
@media (prefers-reduced-motion: reduce){*{animation-duration:.001ms !important;transition-duration:.001ms !important}}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;font-family:var(--sans);font-weight:700;font-size:.92rem;padding:.75rem 1.4rem;border-radius:8px;border:1px solid transparent;cursor:pointer}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-dark)}
.btn-outline{background:var(--surface);color:var(--primary);border-color:var(--primary)}
.btn-outline:hover{background:var(--primary-container)}
.btn-danger{background:var(--danger);color:#fff;width:100%}
.btn-danger:hover{background:#a52222}

/* ---------- nav ---------- */
.navbar{background:var(--surface);border-bottom:1px solid var(--outline);position:sticky;top:0;z-index:1000}
.nav-container{max-width:var(--container);margin:0 auto;padding:0 2rem;height:72px;display:flex;align-items:center;justify-content:space-between;gap:2rem}
.nav-logo{display:flex;align-items:center;gap:.6rem;flex-shrink:0}
.nav-logo img{width:36px;height:auto}
.nav-logo-text{display:flex;flex-direction:column;line-height:1.15}
.nav-logo-text .word{font-family:var(--sans);font-weight:800;font-size:1.02rem;letter-spacing:.02em;color:var(--primary)}
.nav-logo-text .tag{font-size:.68rem;color:var(--on-surface-variant);font-weight:500}
.nav-links{display:flex;gap:1.9rem;align-items:center;flex:1;justify-content:center}
.nav-links a{color:var(--on-surface);font-weight:600;font-size:.92rem}
.nav-links a:hover{color:var(--primary)}
.nav-search-btn{display:flex;align-items:center;gap:.5rem;background:var(--surface);border:1px solid var(--outline-strong);border-radius:24px;padding:.55rem 1.1rem;font-family:var(--sans);font-weight:600;font-size:.88rem;color:var(--on-surface);cursor:pointer;flex-shrink:0}
.nav-search-btn:hover{border-color:var(--primary);color:var(--primary)}
.mobile-menu-btn{display:none;background:none;border:none;cursor:pointer;color:var(--on-surface)}
.breadcrumb{padding:.85rem 2rem;font-size:.82rem;color:var(--on-surface-variant);border-bottom:1px solid var(--outline)}
.breadcrumb-container{max-width:var(--container);margin:0 auto;display:flex;align-items:center;gap:.4rem;flex-wrap:wrap}
.breadcrumb a{color:var(--on-surface-variant)}
.breadcrumb a:hover{color:var(--primary)}
.breadcrumb .current{color:var(--on-surface);font-weight:600}
.breadcrumb .sep{color:var(--outline-strong)}

@media(max-width:900px){
    .nav-links{display:none}
    .mobile-menu-btn{display:block}
    .nav-search-btn span{display:none}
}

/* ---------- disclaimer / trust components (used on every page) ---------- */
.trust-bar{background:var(--surface-container);border-radius:12px;padding:2rem;display:flex;flex-wrap:wrap;gap:2rem;align-items:center;justify-content:space-between}
.trust-bar .trust-lead{display:flex;gap:1rem;align-items:flex-start;max-width:340px}
.trust-bar .trust-lead .icon{flex-shrink:0;width:46px;height:46px;border-radius:50%;background:var(--primary);color:#fff;display:flex;align-items:center;justify-content:center}
.trust-bar .trust-lead h3{font-size:1.08rem;margin-bottom:.3rem}
.trust-bar .trust-lead p{font-size:.88rem;color:var(--on-surface-variant)}
.trust-items{display:flex;gap:2.2rem;flex-wrap:wrap}
.trust-item{max-width:170px}
.trust-item .icon{color:var(--primary);margin-bottom:.5rem}
.trust-item strong{display:block;font-size:.92rem;margin-bottom:.2rem}
.trust-item span{font-size:.82rem;color:var(--on-surface-variant)}

.note-box{background:var(--surface-container);border-radius:12px;padding:1.6rem 1.8rem;display:flex;flex-wrap:wrap;gap:1.5rem;align-items:center;justify-content:space-between}
.note-box .note-lead{display:flex;gap:1rem;align-items:flex-start;max-width:460px}
.note-box .note-lead .icon{flex-shrink:0;color:var(--primary)}
.note-box .note-lead h3{font-size:1rem;margin-bottom:.3rem}
.note-box .note-lead p{font-size:.86rem;color:var(--on-surface-variant)}
.note-box .note-aside{display:flex;gap:1rem;align-items:center;max-width:420px;font-size:.86rem;color:var(--on-surface-variant)}
.note-box .note-aside .icon{color:var(--primary);flex-shrink:0}

.vet-warning{background:var(--danger-bg);border:1px solid var(--danger-border);border-radius:10px;padding:1.25rem 1.5rem}
.vet-warning-head{display:flex;align-items:center;gap:.6rem;font-weight:700;color:var(--danger);margin-bottom:.7rem;font-size:.96rem}
.vet-warning ul{margin-left:1.1rem}
.vet-warning li{list-style:disc;font-size:.9rem;color:var(--on-surface-variant);margin-bottom:.35rem}

/* ---------- shared two-column article/term layout (glossary + content pages) ---------- */
.two-col-layout{max-width:var(--container);margin:0 auto;padding:2.5rem 2rem 3.5rem;display:grid;grid-template-columns:1fr 320px;gap:3rem;align-items:start}
@media(max-width:960px){.two-col-layout{grid-template-columns:1fr}}

.takeaway-box{background:var(--surface-container);border-radius:10px;padding:1.25rem 1.5rem;display:flex;gap:1rem;margin-bottom:2rem}
.takeaway-box .icon{color:var(--primary);flex-shrink:0}
.takeaway-box strong{display:block;font-size:.95rem;margin-bottom:.3rem}
.takeaway-box p{font-size:.88rem;color:var(--on-surface-variant)}

.key-facts{border:1px solid var(--outline);border-radius:10px;overflow:hidden;margin:1.5rem 0}
.key-fact-row{display:grid;grid-template-columns:220px 1fr;border-top:1px solid var(--outline)}
.key-fact-row:first-child{border-top:none}
.key-fact-row dt{background:var(--surface-container);padding:.85rem 1.1rem;font-weight:700;font-size:.85rem;color:var(--primary)}
.key-fact-row dd{padding:.85rem 1.1rem;font-size:.9rem;color:var(--on-surface-variant)}
@media(max-width:600px){.key-fact-row{grid-template-columns:1fr}}

.faq-item{border-top:1px solid var(--outline);padding:1.1rem 0}
.faq-item:last-of-type{border-bottom:1px solid var(--outline)}
.faq-item summary{font-weight:700;font-size:1rem;cursor:pointer;list-style:none;display:flex;justify-content:space-between;align-items:center;gap:1rem}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:'+';font-size:1.3rem;color:var(--primary);flex-shrink:0}
.faq-item[open] summary::after{content:'\2212'}
.faq-item p{margin-top:.7rem;font-size:.92rem;color:var(--on-surface-variant)}

.term-trust-bar{display:flex;flex-wrap:wrap;gap:2rem;padding:1.5rem 0;border-top:1px solid var(--outline);border-bottom:1px solid var(--outline);margin:2rem 0}
.term-trust-item{display:flex;gap:.7rem;align-items:flex-start;min-width:170px}
.term-trust-item .icon{color:var(--primary);flex-shrink:0}
.term-trust-item strong{display:block;font-size:.88rem}
.term-trust-item span{font-size:.8rem;color:var(--on-surface-variant)}

/* sidebar */
.term-sidebar{position:sticky;top:88px;display:flex;flex-direction:column;gap:1.25rem}
.side-box{border:1px solid var(--outline);border-radius:12px;padding:1.4rem}
.side-box h3{font-size:.98rem;margin-bottom:1rem}
.toc-list a{display:flex;align-items:center;gap:.6rem;font-size:.88rem;color:var(--on-surface-variant);padding:.4rem 0}
.toc-list a:hover{color:var(--primary)}
.toc-list .icon{color:var(--primary);flex-shrink:0}
.side-links{display:flex;flex-direction:column}
.side-link{display:flex;align-items:center;gap:.8rem;padding:.7rem 0;border-top:1px solid var(--outline)}
.side-link:first-child{border-top:none;padding-top:0}
.side-link .icon{width:34px;height:34px;border-radius:50%;background:var(--surface-container);color:var(--primary);display:flex;align-items:center;justify-content:center;flex-shrink:0}
.side-link strong{display:block;font-size:.88rem}
.side-link span{font-size:.78rem;color:var(--on-surface-variant)}
.side-view-all{display:block;margin-top:.9rem;font-size:.85rem;font-weight:700;color:var(--primary)}

/* ---------- footer ---------- */
.footer{background:var(--surface);border-top:1px solid var(--outline);padding:3.5rem 0 0;margin-top:1rem}
.footer-top{max-width:var(--container);margin:0 auto;padding:0 2rem 2.5rem;display:grid;grid-template-columns:1.4fr repeat(4,1fr);gap:2rem}
.footer-brand .nav-logo{margin-bottom:.9rem}
.footer-brand p{font-size:.88rem;color:var(--on-surface-variant);margin-bottom:1.1rem;max-width:260px}
.footer-social{display:flex;gap:.6rem}
.footer-social a{width:34px;height:34px;border:1px solid var(--outline-strong);border-radius:50%;display:flex;align-items:center;justify-content:center;color:var(--on-surface-variant)}
.footer-social a:hover{border-color:var(--primary);color:var(--primary)}
.footer-col h4{font-family:var(--mono);font-size:.78rem;text-transform:uppercase;letter-spacing:.05em;color:var(--on-surface);margin-bottom:1rem}
.footer-col li{margin-bottom:.6rem}
.footer-col a{font-size:.88rem;color:var(--on-surface-variant)}
.footer-col a:hover{color:var(--primary)}
.footer-bottom{border-top:1px solid var(--outline);padding:1.4rem 2rem;text-align:center;font-size:.82rem;color:var(--on-surface-variant)}

@media(max-width:960px){
    .footer-top{grid-template-columns:1fr 1fr}
}
@media(max-width:600px){
    .footer-top{grid-template-columns:1fr}
    .trust-bar,.note-box{flex-direction:column;align-items:flex-start}
}