/* ==========================================================================
   theinvisiblegrill.com — design system v0.1
   Palette: deep slate + warm paper + muted brass. System fonts only.
   ========================================================================== */
:root{
  --brand:#1f3b4d;
  --brand-2:#2e5266;
  --accent:#b08d57;
  --accent-soft:#f3ece1;
  --ink:#26313a;
  --muted:#67727c;
  --paper:#faf8f5;
  --card:#ffffff;
  --line:#e6e1d8;
  --ok:#2f6b4f;
  --warn:#8a4b2d;
  --warn-bg:#faf1ea;
  --note-bg:#eef3f6;
  --radius:6px;
  --serif:Georgia,'Times New Roman',serif;
  --sans:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--sans);font-size:1.0625rem;line-height:1.7;color:var(--ink);background:var(--paper)}
img{max-width:100%;height:auto;display:block}
a{color:var(--brand-2);text-decoration:underline;text-decoration-color:rgba(46,82,102,.35);text-underline-offset:3px}
a:hover{color:var(--accent)}
.container{max-width:1100px;margin:0 auto;padding:0 1.25rem}
.skip-link{position:absolute;left:-9999px;top:0;background:var(--brand);color:#fff;padding:.5rem 1rem;z-index:100}
.skip-link:focus{left:0}

/* ---------- header ---------- */
.site-header{background:var(--card);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:50}
.header-inner{display:flex;align-items:center;justify-content:space-between;min-height:64px}
.brand{font-family:var(--serif);font-size:1.35rem;font-weight:700;color:var(--brand);text-decoration:none;letter-spacing:.2px}
.brand em{font-style:normal;color:var(--accent)}
.brand:hover{color:var(--brand)}
.site-nav ul{display:flex;gap:1.6rem;list-style:none}
.site-nav a{font-size:.95rem;font-weight:500;color:var(--ink);text-decoration:none;padding:.35rem 0;border-bottom:2px solid transparent}
.site-nav a:hover,.site-nav a[aria-current="page"]{color:var(--brand);border-bottom-color:var(--accent)}
.nav-toggle{display:none;background:none;border:1px solid var(--line);border-radius:var(--radius);padding:.45rem .6rem;cursor:pointer}
.nav-toggle span{display:block;width:20px;height:2px;background:var(--brand);margin:4px 0;transition:.2s}
@media(max-width:760px){
  .nav-toggle{display:block}
  .site-nav{display:none;position:absolute;top:64px;left:0;right:0;background:var(--card);border-bottom:1px solid var(--line);padding:1rem 1.25rem}
  .site-nav.open{display:block}
  .site-nav ul{flex-direction:column;gap:.4rem}
  .site-nav a{display:block;padding:.55rem 0;font-size:1.05rem}
}

/* ---------- hero ---------- */
.hero{background:linear-gradient(160deg,var(--brand) 0%,var(--brand-2) 100%);color:#fff;padding:4.5rem 0 4rem}
.hero .kicker{display:inline-block;font-size:.8rem;letter-spacing:.14em;text-transform:uppercase;color:#d9c6a5;margin-bottom:1rem;font-weight:600}
.hero h1{font-family:var(--serif);font-size:clamp(1.9rem,4.5vw,3rem);line-height:1.2;font-weight:700;max-width:22ch}
.hero p{max-width:58ch;margin-top:1.2rem;font-size:1.1rem;color:#dbe4ea}
.hero .actions{margin-top:2rem;display:flex;gap:1rem;flex-wrap:wrap}
.btn{display:inline-block;padding:.75rem 1.5rem;border-radius:var(--radius);font-weight:600;text-decoration:none;font-size:.98rem}
.btn-primary{background:var(--accent);color:#fff}
.btn-primary:hover{background:#9a7a48;color:#fff}
.btn-ghost{border:1px solid rgba(255,255,255,.45);color:#fff}
.btn-ghost:hover{border-color:var(--accent);color:#fff}

/* ---------- sections ---------- */
.section{padding:3.5rem 0}
.section-alt{background:var(--card);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section h2{font-family:var(--serif);font-size:clamp(1.5rem,3vw,2rem);color:var(--brand);margin-bottom:.75rem}
.section .lede{color:var(--muted);max-width:64ch;margin-bottom:2rem}
.grid{display:grid;gap:1.4rem}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-2{grid-template-columns:repeat(2,1fr)}
@media(max-width:860px){.grid-3{grid-template-columns:1fr 1fr}}
@media(max-width:600px){.grid-3,.grid-2{grid-template-columns:1fr}}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:1.5rem}
.card h3{font-family:var(--serif);font-size:1.15rem;color:var(--brand);margin-bottom:.5rem}
.card p{font-size:.95rem;color:var(--muted)}
.card .tag{display:inline-block;font-size:.7rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;padding:.15rem .55rem;border-radius:99px;margin-bottom:.7rem}
.tag-live{background:#e7f0ea;color:var(--ok)}
.tag-soon{background:var(--accent-soft);color:#8a6c3c}

/* ---------- trust strip ---------- */
.trust{display:grid;grid-template-columns:repeat(3,1fr);gap:1.4rem}
@media(max-width:760px){.trust{grid-template-columns:1fr}}
.trust div{border-left:3px solid var(--accent);padding-left:1rem}
.trust strong{display:block;font-family:var(--serif);color:var(--brand);margin-bottom:.25rem}
.trust span{font-size:.92rem;color:var(--muted)}

/* ---------- breadcrumbs ---------- */
.breadcrumbs{font-size:.85rem;color:var(--muted);padding:1rem 0}
.breadcrumbs ol{list-style:none;display:flex;flex-wrap:wrap;gap:.35rem}
.breadcrumbs li+li::before{content:"›";margin-right:.35rem;color:var(--line)}
.breadcrumbs a{color:var(--muted)}

/* ---------- article ---------- */
.article-wrap{max-width:760px;margin:0 auto;padding:0 1.25rem}
article header.article-head{padding:1.5rem 0 2rem;border-bottom:1px solid var(--line);margin-bottom:2rem}
article h1{font-family:var(--serif);font-size:clamp(1.8rem,4vw,2.5rem);line-height:1.25;color:var(--brand)}
.byline{display:flex;flex-wrap:wrap;gap:.5rem 1.25rem;margin-top:1rem;font-size:.88rem;color:var(--muted)}
.byline a{color:var(--brand-2)}
article h2{font-family:var(--serif);font-size:1.55rem;color:var(--brand);margin:2.4rem 0 .9rem}
article h3{font-family:var(--serif);font-size:1.2rem;color:var(--brand-2);margin:1.8rem 0 .7rem}
article p{margin-bottom:1.1rem}
article ul,article ol{margin:0 0 1.2rem 1.4rem}
article li{margin-bottom:.45rem}
article figure{margin:1.8rem 0;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
article figure .img-placeholder{background:repeating-linear-gradient(45deg,#f0ece5,#f0ece5 12px,#faf8f5 12px,#faf8f5 24px);min-height:260px;display:flex;align-items:center;justify-content:center;color:var(--muted);font-size:.9rem;padding:1rem;text-align:center}
article figcaption{padding:.7rem 1rem;font-size:.85rem;color:var(--muted);border-top:1px solid var(--line)}
.toc{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:1.2rem 1.4rem;margin:0 0 2rem}
.toc strong{font-family:var(--serif);color:var(--brand)}
.toc ol{margin:.6rem 0 0 1.2rem;font-size:.93rem}
.toc li{margin-bottom:.25rem}

/* tables */
.table-scroll{overflow-x:auto;margin:1.5rem 0}
table{border-collapse:collapse;width:100%;font-size:.92rem;background:var(--card)}
caption{caption-side:top;text-align:left;font-weight:600;font-family:var(--serif);color:var(--brand);padding:.5rem 0}
th,td{border:1px solid var(--line);padding:.6rem .8rem;text-align:left;vertical-align:top}
thead th{background:var(--brand);color:#fff;font-weight:600}
tbody tr:nth-child(even){background:#f6f3ee}

/* callouts */
.callout{border-radius:var(--radius);padding:1rem 1.25rem;margin:1.5rem 0;font-size:.95rem;border-left:4px solid}
.callout strong{display:block;margin-bottom:.3rem;font-family:var(--serif)}
.callout-note{background:var(--note-bg);border-color:var(--brand-2)}
.callout-warn{background:var(--warn-bg);border-color:var(--warn)}
.callout-warn strong{color:var(--warn)}

/* pros & cons */
.proscons{display:grid;grid-template-columns:1fr 1fr;gap:1.2rem;margin:1.5rem 0}
@media(max-width:640px){.proscons{grid-template-columns:1fr}}
.proscons>div{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:1.2rem}
.proscons h3{margin:0 0 .8rem}
.proscons .pro h3{color:var(--ok)}
.proscons .con h3{color:var(--warn)}
.proscons ul{margin-left:1.2rem;font-size:.95rem}

/* FAQ */
.faq details{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);margin-bottom:.7rem;padding:0}
.faq summary{cursor:pointer;font-weight:600;padding:1rem 1.2rem;color:var(--brand);list-style-position:inside}
.faq details[open] summary{border-bottom:1px solid var(--line)}
.faq details div{padding:1rem 1.2rem}
.faq details div p{margin-bottom:.6rem}

/* sources & meta */
.sources{font-size:.88rem;color:var(--muted);border-top:1px solid var(--line);margin-top:2.5rem;padding-top:1.2rem}
.sources h2{font-size:1.2rem;margin-top:0}
.sources ol{margin-left:1.3rem}
.review-note{font-size:.85rem;color:var(--muted);background:var(--card);border:1px dashed var(--line);border-radius:var(--radius);padding:.8rem 1rem;margin-top:1.5rem}

/* ---------- footer ---------- */
.site-footer{background:var(--brand);color:#c8d3db;margin-top:4rem;font-size:.92rem}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:2.5rem;padding:3rem 0 2rem}
@media(max-width:760px){.footer-grid{grid-template-columns:1fr}}
.site-footer h4{font-family:var(--serif);color:#fff;margin-bottom:.8rem;font-size:1rem}
.site-footer ul{list-style:none}
.site-footer li{margin-bottom:.45rem}
.site-footer a{color:#c8d3db;text-decoration:none}
.site-footer a:hover{color:var(--accent);text-decoration:underline}
.footer-brand p{max-width:44ch;margin-top:.6rem}
.footer-bottom{border-top:1px solid rgba(255,255,255,.14);padding:1.2rem 0;font-size:.82rem;display:flex;justify-content:space-between;flex-wrap:wrap;gap:.5rem}