/* ============================================================
   apartmentairfix.top — core stylesheet
   Palette: deep navy + teal primary + amber accent
   ============================================================ */
:root{
  --ink:#0f1f2e;
  --ink-2:#1b3a52;
  --teal:#0d7a6f;
  --teal-d:#0a5f57;
  --teal-l:#e6f4f2;
  --amber:#f59e0b;
  --amber-d:#b45309;
  --amber-l:#fff5e6;
  --bg:#f7f9fb;
  --card:#ffffff;
  --line:#e2e8f0;
  --muted:#5b6b7f;
  --green:#0f8a5f;
  --green-l:#e7f6ef;
  --red:#b42318;
  --red-l:#fdecea;
  --amz:#ff9900;
  --amz-l:#fff4e0;
  --radius:14px;
  --shadow:0 1px 3px rgba(15,31,46,.06),0 8px 24px -12px rgba(15,31,46,.12);
  --maxw:1180px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:"Segoe UI",system-ui,-apple-system,"Helvetica Neue",Arial,sans-serif;
  background:var(--bg);color:var(--ink);line-height:1.7;font-size:16.5px;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto}
a{color:var(--teal-d);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 20px}
.narrow{max-width:820px;margin:0 auto;padding:0 20px}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;background:#fff;
  border-bottom:1px solid var(--line);box-shadow:0 1px 2px rgba(15,31,46,.04);
}
.hdr{display:flex;align-items:center;justify-content:space-between;gap:18px;padding:13px 20px;max-width:var(--maxw);margin:0 auto}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:18px;color:var(--ink);letter-spacing:-.3px}
.logo:hover{text-decoration:none}
.logo .mark{
  width:34px;height:34px;border-radius:9px;background:var(--teal);color:#fff;
  display:flex;align-items:center;justify-content:center;font-size:17px;flex:0 0 auto;
}
.logo small{display:block;font-size:10.5px;font-weight:600;color:var(--muted);letter-spacing:.6px;text-transform:uppercase;line-height:1}
.nav{display:flex;align-items:center;gap:4px;flex-wrap:wrap}
.nav a{
  color:var(--ink-2);font-size:14.5px;font-weight:600;padding:8px 12px;border-radius:8px;
  transition:.15s;white-space:nowrap;
}
.nav a:hover{background:var(--teal-l);color:var(--teal-d);text-decoration:none}
.nav a.active{background:var(--teal-l);color:var(--teal-d)}
.nav-toggle{display:none;background:none;border:1px solid var(--line);border-radius:8px;padding:7px 11px;font-size:18px;cursor:pointer;color:var(--ink)}

/* ---------- Hero ---------- */
.hero{
  background:linear-gradient(155deg,#0f1f2e 0%,#14384f 55%,#0d5a54 100%);
  color:#fff;padding:64px 0 58px;position:relative;overflow:hidden;
}
.hero::after{
  content:"";position:absolute;right:-120px;top:-120px;width:420px;height:420px;border-radius:50%;
  background:radial-gradient(circle,rgba(245,158,11,.16),transparent 70%);
}
.hero .wrap{position:relative;z-index:2;display:grid;grid-template-columns:1.15fr .85fr;gap:44px;align-items:center}
.kicker{
  display:inline-block;background:rgba(245,158,11,.16);color:#ffd27a;border:1px solid rgba(245,158,11,.4);
  border-radius:999px;padding:5px 14px;font-size:12.5px;font-weight:700;letter-spacing:.5px;margin-bottom:18px;
}
.hero h1{font-size:clamp(28px,4.2vw,44px);line-height:1.18;font-weight:800;letter-spacing:-.8px;margin-bottom:16px}
.hero h1 .hl{color:var(--amber)}
.hero p.lead{font-size:17px;color:#c3d3e2;max-width:620px;margin-bottom:26px}
.hero-cta{display:flex;gap:12px;flex-wrap:wrap}
.hero-img{border-radius:16px;overflow:hidden;box-shadow:0 24px 60px -20px rgba(0,0,0,.6);border:1px solid rgba(255,255,255,.12)}
.hero-img img{width:100%;height:340px;object-fit:cover}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:8px;border-radius:10px;padding:12px 22px;
  font-weight:700;font-size:15px;cursor:pointer;border:none;font-family:inherit;transition:.15s;
  text-decoration:none;line-height:1.2;
}
.btn:hover{text-decoration:none;transform:translateY(-1px)}
.btn-primary{background:var(--amber);color:#3a2500}
.btn-primary:hover{background:#ffb733}
.btn-teal{background:var(--teal);color:#fff}
.btn-teal:hover{background:var(--teal-d)}
.btn-ghost{background:rgba(255,255,255,.1);color:#fff;border:1px solid rgba(255,255,255,.28)}
.btn-ghost:hover{background:rgba(255,255,255,.18)}
.btn-amz{background:var(--amz);color:#111;font-weight:800;box-shadow:0 2px 0 #c47a00}
.btn-amz:hover{background:#ffab2e}
.btn-sm{padding:9px 16px;font-size:13.5px}
.btn-block{width:100%;justify-content:center}

/* ---------- Section headings ---------- */
.sec{padding:56px 0}
.sec-head{text-align:center;max-width:720px;margin:0 auto 38px}
.sec-head h2{font-size:clamp(23px,3vw,32px);font-weight:800;letter-spacing:-.5px;color:var(--ink);margin-bottom:10px}
.sec-head p{color:var(--muted);font-size:16px}
.sec-head .eyebrow{color:var(--teal);font-weight:800;font-size:12.5px;letter-spacing:1.2px;text-transform:uppercase;display:block;margin-bottom:8px}

/* ---------- Cards / grids ---------- */
.grid{display:grid;gap:22px}
.g2{grid-template-columns:repeat(auto-fit,minmax(320px,1fr))}
.g3{grid-template-columns:repeat(auto-fit,minmax(280px,1fr))}
.g4{grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}

.post-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;
  display:flex;flex-direction:column;transition:.18s;box-shadow:var(--shadow);
}
.post-card:hover{transform:translateY(-3px);box-shadow:0 14px 34px -14px rgba(15,31,46,.28);border-color:#cfe0dd}
.post-card .thumb{height:190px;overflow:hidden;background:var(--teal-l)}
.post-card .thumb img{width:100%;height:100%;object-fit:cover;transition:.3s}
.post-card:hover .thumb img{transform:scale(1.04)}
.post-card .body{padding:20px 22px 22px;display:flex;flex-direction:column;flex:1}
.post-card h3{font-size:18.5px;line-height:1.35;font-weight:800;color:var(--ink);margin-bottom:9px}
.post-card h3 a{color:inherit}
.post-card h3 a:hover{color:var(--teal-d);text-decoration:none}
.post-card p{font-size:14.5px;color:var(--muted);margin-bottom:14px;flex:1}
.post-card .meta{font-size:12.5px;color:var(--muted);display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin-top:auto}

.cat-pill{
  display:inline-block;font-size:11.5px;font-weight:800;letter-spacing:.4px;text-transform:uppercase;
  padding:4px 11px;border-radius:999px;background:var(--teal-l);color:var(--teal-d);
}
.cat-pill.amber{background:var(--amber-l);color:var(--amber-d)}
.cat-pill.blue{background:#eaf2fb;color:#1d4e89}
.cat-pill.green{background:var(--green-l);color:var(--green)}

.cat-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:26px 24px;
  transition:.18s;box-shadow:var(--shadow);display:block;
}
.cat-card:hover{transform:translateY(-3px);border-color:var(--teal);text-decoration:none}
.cat-card .ico{font-size:30px;margin-bottom:12px;display:block}
.cat-card h3{font-size:18px;font-weight:800;color:var(--ink);margin-bottom:6px}
.cat-card p{font-size:14px;color:var(--muted);margin-bottom:10px}
.cat-card .count{font-size:12.5px;font-weight:700;color:var(--teal)}

/* ---------- Newsletter ---------- */
.newsletter{
  background:linear-gradient(150deg,#0f1f2e,#0d5a54);color:#fff;border-radius:18px;
  padding:44px 40px;text-align:center;position:relative;overflow:hidden;
}
.newsletter h2{font-size:26px;font-weight:800;margin-bottom:10px}
.newsletter p{color:#c3d3e2;max-width:560px;margin:0 auto 22px;font-size:15.5px}
.nl-form{display:flex;gap:10px;max-width:480px;margin:0 auto;flex-wrap:wrap}
.nl-form input{
  flex:1;min-width:220px;padding:13px 16px;border-radius:10px;border:1px solid rgba(255,255,255,.25);
  background:rgba(255,255,255,.1);color:#fff;font-size:15px;font-family:inherit;
}
.nl-form input::placeholder{color:#9fb4c6}
.nl-form input:focus{outline:2px solid var(--amber);background:rgba(255,255,255,.16)}
.nl-note{font-size:12.5px;color:#9fb4c6;margin-top:12px}

/* ---------- Article ---------- */
.breadcrumbs{font-size:13px;color:var(--muted);padding:18px 0 0}
.breadcrumbs a{color:var(--muted)}
.breadcrumbs span{color:var(--ink-2);font-weight:600}
.article-head{padding:22px 0 26px}
.article-head h1{font-size:clamp(27px,3.8vw,40px);line-height:1.2;font-weight:800;letter-spacing:-.7px;margin:14px 0 14px;color:var(--ink)}
.article-head .dek{font-size:18px;color:var(--muted);line-height:1.6;margin-bottom:18px}
.byline{display:flex;align-items:center;gap:12px;font-size:13.5px;color:var(--muted);flex-wrap:wrap;padding-top:14px;border-top:1px solid var(--line)}
.byline .avatar{width:38px;height:38px;border-radius:50%;background:var(--teal);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:15px}
.byline b{color:var(--ink-2)}
.hero-article{border-radius:var(--radius);overflow:hidden;margin:8px 0 30px;box-shadow:var(--shadow)}
.hero-article img{width:100%;height:400px;object-fit:cover}

.article-body{font-size:17px;line-height:1.78;color:#22303f}
.article-body h2{font-size:26px;font-weight:800;color:var(--ink);margin:38px 0 14px;letter-spacing:-.4px;line-height:1.3}
.article-body h3{font-size:20px;font-weight:800;color:var(--ink-2);margin:28px 0 10px}
.article-body p{margin-bottom:16px}
.article-body ul,.article-body ol{margin:0 0 18px 24px}
.article-body li{margin-bottom:9px}
.article-body strong{color:var(--ink);font-weight:700}
.article-body a{font-weight:600;border-bottom:1px solid rgba(13,122,111,.35)}
.article-body a:hover{text-decoration:none;border-bottom-color:var(--teal)}
.article-body img{border-radius:12px;margin:22px 0}

/* ---------- Callouts ---------- */
.callout{border-radius:12px;padding:18px 22px;margin:24px 0;font-size:15.5px;border-left:5px solid var(--amber);background:var(--amber-l)}
.callout b{display:block;margin-bottom:4px;color:var(--ink)}
.callout.info{border-left-color:#2f6fb0;background:#eaf2fb}
.callout.ok{border-left-color:var(--green);background:var(--green-l)}
.callout.warn{border-left-color:var(--red);background:var(--red-l)}
.callout.amz{border-left-color:var(--amz);background:var(--amz-l)}
.callout.teal{border-left-color:var(--teal);background:var(--teal-l)}

/* ---------- Disclosure bar ---------- */
.disclosure-bar{
  background:var(--amz-l);border:1px solid #f0d9a0;border-radius:10px;padding:12px 18px;
  font-size:13.5px;color:#6b4e00;margin:20px 0;
}
.disclosure-bar b{color:#8a5200}

/* ---------- Tables ---------- */
.tbl-scroll{overflow-x:auto;margin:22px 0;border:1px solid var(--line);border-radius:12px;background:#fff}
table{width:100%;border-collapse:collapse;font-size:14.5px;min-width:560px}
thead th{background:var(--ink);color:#fff;text-align:left;padding:12px 14px;font-weight:700;font-size:13px;letter-spacing:.3px;white-space:nowrap}
tbody td{padding:12px 14px;border-top:1px solid var(--line);vertical-align:top}
tbody tr:nth-child(even){background:#fafcfe}
tbody tr:hover{background:var(--teal-l)}
td.pname{font-weight:700;color:var(--ink)}
.tag{display:inline-block;font-size:11.5px;font-weight:800;padding:3px 10px;border-radius:999px;white-space:nowrap}
.t-green{background:var(--green-l);color:var(--green)}
.t-amber{background:var(--amber-l);color:var(--amber-d)}
.t-red{background:var(--red-l);color:var(--red)}
.t-blue{background:#eaf2fb;color:#1d4e89}

/* ---------- Product box ---------- */
.product-box{
  border:1px solid var(--line);border-radius:14px;padding:20px;margin:24px 0;background:#fff;
  box-shadow:var(--shadow);display:grid;grid-template-columns:150px 1fr;gap:20px;align-items:center;
}
.product-box .pimg{border-radius:10px;overflow:hidden;background:var(--teal-l);height:150px}
.product-box .pimg img{width:100%;height:100%;object-fit:cover}
.product-box h4{font-size:18px;font-weight:800;color:var(--ink);margin-bottom:6px}
.product-box .rating{color:var(--amber-d);font-weight:700;font-size:14px;margin-bottom:8px}
.product-box p{font-size:14.5px;color:var(--muted);margin-bottom:12px}
.top-pick{border:2px solid var(--amber);position:relative}
.top-pick::before{
  content:"★ OUR TOP PICK";position:absolute;top:-12px;left:20px;background:var(--amber);color:#3a2500;
  font-size:11px;font-weight:800;letter-spacing:.6px;padding:3px 12px;border-radius:999px;
}

/* ---------- FAQ ---------- */
.faq{margin:26px 0}
.faq details{border:1px solid var(--line);border-radius:12px;margin-bottom:12px;background:#fff;overflow:hidden}
.faq summary{
  padding:16px 20px;font-weight:700;font-size:16.5px;cursor:pointer;color:var(--ink);
  list-style:none;display:flex;justify-content:space-between;align-items:center;gap:14px;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-size:22px;color:var(--teal);font-weight:700;flex:0 0 auto}
.faq details[open] summary::after{content:"−"}
.faq details[open] summary{border-bottom:1px solid var(--line);background:var(--teal-l)}
.faq .ans{padding:16px 20px;font-size:15.5px;color:#33465a}

/* ---------- TOC ---------- */
.toc-box{background:#fff;border:1px solid var(--line);border-radius:12px;padding:20px 24px;margin:26px 0}
.toc-box h4{font-size:13px;text-transform:uppercase;letter-spacing:1px;color:var(--muted);margin-bottom:12px}
.toc-box ol{margin:0 0 0 20px}
.toc-box li{margin-bottom:7px;font-size:15px}

/* ---------- Author box ---------- */
.author-box{
  background:#fff;border:1px solid var(--line);border-radius:14px;padding:24px;margin:40px 0;
  display:flex;gap:18px;align-items:flex-start;
}
.author-box .avatar{width:64px;height:64px;border-radius:50%;background:var(--teal);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:24px;flex:0 0 auto}
.author-box h4{font-size:17px;font-weight:800;color:var(--ink);margin-bottom:5px}
.author-box p{font-size:14.5px;color:var(--muted);margin:0}

/* ---------- Related ---------- */
.related{margin:44px 0 0;padding-top:34px;border-top:2px solid var(--line)}
.related h3{font-size:22px;font-weight:800;margin-bottom:22px;color:var(--ink)}

/* ---------- Page (static) ---------- */
.page-hero{background:linear-gradient(150deg,#0f1f2e,#14384f);color:#fff;padding:52px 0 46px}
.page-hero h1{font-size:clamp(26px,3.6vw,38px);font-weight:800;letter-spacing:-.6px;margin-bottom:10px}
.page-hero p{color:#c3d3e2;font-size:16.5px;max-width:680px}
.page-body{padding:44px 0 60px}
.page-body h2{font-size:24px;font-weight:800;color:var(--ink);margin:32px 0 12px}
.page-body h3{font-size:19px;font-weight:800;color:var(--ink-2);margin:24px 0 10px}
.page-body p{margin-bottom:15px;color:#33465a}
.page-body ul,.page-body ol{margin:0 0 18px 24px;color:#33465a}
.page-body li{margin-bottom:8px}

/* ---------- Contact form ---------- */
.form-card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:30px;box-shadow:var(--shadow)}
.field{margin-bottom:18px}
.field label{display:block;font-weight:700;font-size:14px;color:var(--ink-2);margin-bottom:7px}
.field input,.field textarea,.field select{
  width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:10px;font-size:15px;
  font-family:inherit;background:#fbfdff;color:var(--ink);
}
.field input:focus,.field textarea:focus,.field select:focus{outline:2px solid var(--teal);border-color:var(--teal)}
.field textarea{min-height:130px;resize:vertical}

/* ---------- Footer ---------- */
.site-footer{background:var(--ink);color:#9fb4c6;padding:52px 0 26px;font-size:14.5px;margin-top:20px}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:34px;margin-bottom:34px}
.site-footer h4{color:#fff;font-size:14px;font-weight:800;letter-spacing:.5px;text-transform:uppercase;margin-bottom:14px}
.site-footer a{color:#9fb4c6;display:block;margin-bottom:9px;font-size:14px}
.site-footer a:hover{color:var(--amber);text-decoration:none}
.site-footer .about p{font-size:14px;line-height:1.7;margin-bottom:14px}
.foot-bottom{border-top:1px solid rgba(255,255,255,.12);padding-top:22px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13px}
.foot-disclosure{
  background:rgba(255,153,0,.1);border:1px solid rgba(255,153,0,.3);border-radius:10px;
  padding:14px 18px;font-size:13.5px;color:#f4f8fb;margin-bottom:30px;line-height:1.65;
}
.foot-disclosure b{color:#ffb733}

/* ---------- Misc ---------- */
.stat-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:16px;margin:26px 0}
.stat{background:#fff;border:1px solid var(--line);border-radius:12px;padding:18px;text-align:center}
.stat b{display:block;font-size:26px;font-weight:800;color:var(--teal);line-height:1.1}
.stat span{font-size:13px;color:var(--muted);display:block;margin-top:5px}
.center{text-align:center}
.mt-0{margin-top:0}
.mb-0{margin-bottom:0}
.skip-link{position:absolute;left:-9999px}
.skip-link:focus{left:20px;top:10px;background:#fff;padding:10px 16px;border-radius:8px;z-index:100}

/* ---------- Responsive ---------- */
@media (max-width:900px){
  .hero .wrap{grid-template-columns:1fr;gap:30px}
  .hero-img img{height:260px}
  .foot-grid{grid-template-columns:1fr 1fr;gap:26px}
  .product-box{grid-template-columns:1fr}
  .product-box .pimg{height:200px}
}
@media (max-width:720px){
  body{font-size:16px}
  .nav{display:none;position:absolute;top:100%;left:0;right:0;background:#fff;flex-direction:column;
       align-items:stretch;padding:12px;border-bottom:1px solid var(--line);box-shadow:0 12px 24px -12px rgba(0,0,0,.2)}
  .nav.open{display:flex}
  .nav a{padding:12px 14px}
  .nav-toggle{display:block}
  .hero{padding:44px 0 40px}
  .sec{padding:40px 0}
  .newsletter{padding:32px 22px}
  .hero-article img{height:240px}
  .article-body{font-size:16.5px}
  .article-body h2{font-size:22px}
  .foot-grid{grid-template-columns:1fr}
  .author-box{flex-direction:column}
}
@media print{
  .site-header,.site-footer,.newsletter,.nav-toggle{display:none!important}
  body{background:#fff}
}

/* ---------- blog hub section headings ---------- */
.hub-h2{font-size:clamp(20px,2.4vw,26px);font-weight:800;letter-spacing:-.4px;color:var(--ink);
  margin:44px 0 6px;padding-top:26px;border-top:1px solid var(--line)}
.hub-h2:first-child{margin-top:0;padding-top:0;border-top:0}
.hub-h2 span{font-size:13px;font-weight:700;color:var(--teal);letter-spacing:.4px;text-transform:uppercase;
  margin-left:10px;vertical-align:middle}
.hub-h2 + .grid{margin-top:20px;margin-bottom:8px}