/* ============================================================
   Home Building Websites
   Bright, boxed, all sans-serif. Sticky header, rounded cards
   with soft shadows, alternating section bands, sidebar layout.
   ============================================================ */

:root{
  --bg:#FFFFFF;
  --band:#F3F5F7;
  --ink:#101418;
  --ink-2:#4B5563;
  --ink-3:#7A8794;
  --line:#E3E8ED;
  --teal:#0F6E63;
  --teal-d:#0B564D;
  --teal-l:#E6F2F0;
  --amber:#E8A33D;
  --amber-d:#C9861F;

  --font:'Manrope',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;
  --wrap:1200px;
  --r:12px;
  --shadow:0 1px 2px rgba(16,20,24,.04), 0 8px 24px rgba(16,20,24,.06);
  --shadow-h:0 2px 4px rgba(16,20,24,.06), 0 14px 34px rgba(16,20,24,.10);
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:96px}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font-family:var(--font);font-size:16px;line-height:1.65;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--teal)}
h1,h2,h3,h4{font-weight:800;letter-spacing:-.02em;line-height:1.18;margin:0}

.wrap{width:100%;max-width:var(--wrap);margin:0 auto;padding:0 24px}
.narrow{max-width:820px}
.skip{position:absolute;left:-9999px}
.skip:focus{left:16px;top:16px;background:var(--ink);color:#fff;padding:10px 14px;border-radius:8px;z-index:99}

/* ── Header ───────────────────────────────────────────────── */
.hdr{
  position:sticky;top:0;z-index:50;
  background:rgba(255,255,255,.94);
  backdrop-filter:saturate(1.6) blur(10px);
  border-bottom:1px solid var(--line);
}
.hdr-in{display:flex;align-items:center;gap:24px;height:72px}

.brand{display:flex;align-items:center;gap:11px;text-decoration:none;color:var(--ink);flex-shrink:0}
.brand-mark{
  display:grid;place-items:center;
  width:38px;height:38px;border-radius:10px;
  background:var(--teal);color:#fff;
  font-weight:800;font-size:14px;letter-spacing:.02em;
}
.brand-text{display:flex;flex-direction:column;line-height:1.1}
.brand-name{font-weight:800;font-size:15px;letter-spacing:-.01em}
.brand-sub{font-size:11px;font-weight:500;color:var(--ink-3);letter-spacing:.06em;text-transform:uppercase}

.nav{display:flex;gap:4px;margin-left:8px}
.nav a{
  padding:8px 12px;border-radius:8px;text-decoration:none;
  font-size:14px;font-weight:600;color:var(--ink-2);
  white-space:nowrap;transition:background .15s,color .15s;
}
.nav a:hover{background:var(--band);color:var(--ink)}
.nav a.on{background:var(--teal-l);color:var(--teal-d)}

.hdr-right{margin-left:auto;display:flex;align-items:center;gap:12px}
.hsearch input{
  width:170px;padding:9px 13px;border:1px solid var(--line);border-radius:999px;
  background:var(--band);font-family:var(--font);font-size:13px;color:var(--ink);outline:none;
  transition:border-color .15s,background .15s,width .18s;
}
.hsearch input:focus{border-color:var(--teal);background:#fff;width:210px}
.hsearch input::placeholder{color:var(--ink-3)}

.nav-state{display:none}
.burger{display:none}

/* ── Buttons ──────────────────────────────────────────────── */
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  padding:13px 22px;border:1px solid transparent;border-radius:10px;
  font-family:var(--font);font-size:15px;font-weight:700;
  text-decoration:none;cursor:pointer;white-space:nowrap;
  transition:background .16s,color .16s,border-color .16s,transform .1s;
}
.btn:active{transform:translateY(1px)}
.btn-sm{padding:9px 15px;font-size:13.5px;border-radius:9px}
.btn-primary{background:var(--teal);color:#fff}
.btn-primary:hover{background:var(--teal-d)}
.btn-amber{background:var(--amber);color:#221806}
.btn-amber:hover{background:var(--amber-d)}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--ink-3);background:var(--band)}

/* ── Pills / chips ────────────────────────────────────────── */
.pill{
  display:inline-block;padding:4px 11px;border-radius:999px;
  background:var(--teal-l);color:var(--teal-d);
  font-size:11.5px;font-weight:700;letter-spacing:.03em;text-transform:uppercase;
}
.pill-amber{background:#FCF1DE;color:#8A5A08}

.chips{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 28px}
.chip{
  padding:8px 15px;border:1px solid var(--line);border-radius:999px;
  background:#fff;color:var(--ink-2);font-size:13.5px;font-weight:600;text-decoration:none;
  transition:border-color .15s,color .15s,background .15s;
}
.chip:hover{border-color:var(--teal);color:var(--teal)}
.chip-on{background:var(--teal);border-color:var(--teal);color:#fff}

/* ── Sections ─────────────────────────────────────────────── */
.section{padding:clamp(44px,6vw,72px) 0}
.band{background:var(--band);border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:clamp(44px,6vw,72px) 0}
.h2{font-size:clamp(24px,3vw,32px);margin:0}
.band-head{display:flex;align-items:baseline;justify-content:space-between;gap:20px;margin:0 0 28px;flex-wrap:wrap}
.link-arrow{font-size:14px;font-weight:700;text-decoration:none}
.link-arrow::after{content:' →'}
.link-arrow:hover{text-decoration:underline}

/* ── Hero ─────────────────────────────────────────────────── */
.hero{background:linear-gradient(180deg,#F7FAFA 0%,#FFFFFF 100%);border-bottom:1px solid var(--line)}
.hero-in{display:grid;grid-template-columns:1.35fr 1fr;gap:clamp(28px,4vw,56px);align-items:center;padding-top:clamp(44px,6vw,80px);padding-bottom:clamp(44px,6vw,80px)}
.hero-h{font-size:clamp(32px,4.6vw,52px);margin:16px 0 0;max-width:16ch}
.hero-p{margin:18px 0 0;font-size:17px;color:var(--ink-2);max-width:56ch}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px}

.hero-facts{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:1fr 1fr;gap:12px}
.hero-facts li{
  background:#fff;border:1px solid var(--line);border-radius:var(--r);
  padding:16px 16px 14px;box-shadow:var(--shadow);
}
.hero-facts strong{display:block;font-size:14px;font-weight:800}
.hero-facts span{display:block;font-size:12.5px;color:var(--ink-3);margin-top:3px}

/* ── Topics ───────────────────────────────────────────────── */
.topics{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.topic{
  display:block;background:#fff;border:1px solid var(--line);border-radius:var(--r);
  padding:20px;text-decoration:none;color:inherit;
  transition:box-shadow .18s,transform .18s,border-color .18s;
}
.topic:hover{box-shadow:var(--shadow-h);transform:translateY(-2px);border-color:#D3DBE2}
.topic-name{display:block;font-weight:800;font-size:17px}
.topic-desc{display:block;font-size:14px;color:var(--ink-2);margin-top:7px}
.topic-count{display:block;font-size:12.5px;font-weight:700;color:var(--teal);margin-top:12px}

/* ── Feature + cards ──────────────────────────────────────── */
.thumb{width:100%;aspect-ratio:16/10;object-fit:cover;background:var(--band)}
.thumb-empty{
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,#EAF1F0,#F5F7F8);
  color:#B6C4C2;font-size:clamp(34px,5vw,58px);font-weight:800;user-select:none;
}

.feature{
  display:grid;grid-template-columns:1.15fr 1fr;gap:0;
  background:#fff;border:1px solid var(--line);border-radius:var(--r);
  overflow:hidden;text-decoration:none;color:inherit;margin:0 0 24px;
  box-shadow:var(--shadow);transition:box-shadow .18s;
}
.feature:hover{box-shadow:var(--shadow-h)}
.feature-img{height:100%;aspect-ratio:auto;min-height:260px}
.feature-body{padding:clamp(22px,3vw,34px);align-self:center}
.feature-h{font-size:clamp(21px,2.4vw,27px);margin:12px 0 0}
.feature-p{margin:12px 0 0;color:var(--ink-2);font-size:15.5px}

.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r);overflow:hidden;
  display:flex;flex-direction:column;box-shadow:var(--shadow);
  transition:box-shadow .18s,transform .18s;
}
.card:hover{box-shadow:var(--shadow-h);transform:translateY(-2px)}
.card-media{display:block}
.card-body{padding:18px;display:flex;flex-direction:column;flex:1}
.card-h{font-size:17.5px;margin:10px 0 0}
.card-h a{color:inherit;text-decoration:none}
.card-h a:hover{color:var(--teal)}
.card-p{margin:9px 0 0;font-size:14.5px;color:var(--ink-2)}
.dateline{margin:auto 0 0;padding-top:14px;font-size:12.5px;color:var(--ink-3);font-weight:600}

/* ── Why ──────────────────────────────────────────────────── */
.why{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:24px}
.why-item{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:24px}
.why-n{
  display:grid;place-items:center;width:32px;height:32px;border-radius:9px;
  background:var(--amber);color:#221806;font-weight:800;font-size:15px;margin-bottom:14px;
}
.why-item h3{font-size:17px;margin:0 0 8px}
.why-item p{margin:0;color:var(--ink-2);font-size:14.5px}

/* ── Breadcrumb bar ───────────────────────────────────────── */
.crumbbar{background:var(--band);border-bottom:1px solid var(--line);font-size:13px;color:var(--ink-3)}
.crumbbar .wrap{padding-top:11px;padding-bottom:11px}
.crumbbar a{text-decoration:none;font-weight:600}
.crumbbar a:hover{text-decoration:underline}
.crumbbar span{padding:0 7px;color:#AFBAC4}

/* ── Page head ────────────────────────────────────────────── */
.ph{margin:0 0 28px}
.ph-h{font-size:clamp(28px,3.8vw,42px);margin:12px 0 0;max-width:22ch}
.ph-p{margin:14px 0 0;color:var(--ink-2);font-size:17px;max-width:62ch}

/* ── Article layout ───────────────────────────────────────── */
.layout{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:40px;align-items:start}
.post{min-width:0}
.post-head{margin:0 0 26px}
.post-h{font-size:clamp(28px,4vw,42px);margin:12px 0 0}
.post-lede{margin:16px 0 0;font-size:18px;color:var(--ink-2)}
.post-cover{width:100%;border-radius:var(--r);border:1px solid var(--line);margin:0 0 28px}

.body{font-size:16.5px;line-height:1.75;color:#2A3138}
.body h2{font-size:clamp(21px,2.4vw,26px);margin:2em 0 .6em;color:var(--ink)}
.body h3{font-size:19px;margin:1.7em 0 .5em;color:var(--ink)}
.body p{margin:0 0 1.15em}
.body ul,.body ol{margin:0 0 1.3em;padding-left:1.35em}
.body li{margin:0 0 .5em}
.body a{font-weight:600}
.body img{border-radius:var(--r);border:1px solid var(--line);margin:1.8em 0}
.body blockquote{
  margin:1.8em 0;padding:16px 20px;border-left:4px solid var(--amber);
  background:#FDF8EF;border-radius:0 var(--r) var(--r) 0;color:var(--ink);
}
.body table{width:100%;border-collapse:collapse;margin:1.8em 0;font-size:15px;
  border:1px solid var(--line);border-radius:var(--r);overflow:hidden}
.body th,.body td{text-align:left;padding:12px 14px;border-bottom:1px solid var(--line)}
.body th{background:var(--band);font-weight:700;font-size:13.5px}
.body tr:last-child td{border-bottom:0}

.post-foot{
  margin-top:40px;padding:26px;border:1px solid var(--line);border-radius:var(--r);
  background:var(--teal-l);
}
.post-foot-h{margin:0;font-weight:800;font-size:19px}
.post-foot-p{margin:8px 0 18px;color:var(--ink-2);font-size:15px}

/* ── TOC ──────────────────────────────────────────────────── */
.toc ol{list-style:none;margin:0;padding:0;counter-reset:t}
.toc li{margin:0 0 8px;font-size:14px}
.toc li.lv3{padding-left:16px;font-size:13.5px}
.toc a{text-decoration:none;color:var(--ink-2);font-weight:600}
.toc a:hover{color:var(--teal);text-decoration:underline}
.toc-h{margin:0 0 12px;font-size:12px;font-weight:800;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-3)}
.toc-inline{display:none}

/* ── Sidebar ──────────────────────────────────────────────── */
.side{position:sticky;top:96px;display:flex;flex-direction:column;gap:16px}
.side-box{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:20px;box-shadow:var(--shadow)}
.side-h{margin:0 0 12px;font-size:12px;font-weight:800;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-3)}
.side-p{margin:0 0 16px;font-size:14.5px;color:var(--ink-2)}
.side-list{list-style:none;margin:0;padding:0}
.side-list li{margin:0 0 10px;font-size:14.5px;color:var(--ink-2)}
.side-list a{text-decoration:none;font-weight:600}
.side-list a:hover{text-decoration:underline}
.side-ticks li{padding-left:22px;position:relative}
.side-ticks li::before{content:'✓';position:absolute;left:0;color:var(--teal);font-weight:800}
.side-cta{background:#FDF8EF;border-color:#F0DFC0}

/* ── Contact ──────────────────────────────────────────────── */
.contact{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:40px;align-items:start}
.contact-side{display:flex;flex-direction:column;gap:16px}
.panel{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:clamp(20px,3vw,30px);box-shadow:var(--shadow)}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:0 16px}
.fld{display:block;margin:0 0 18px}
.fld > span{display:block;font-size:13px;font-weight:700;margin-bottom:7px}
.fld > span em{font-style:normal;font-weight:600;color:var(--ink-3);font-size:11.5px;margin-left:5px}
.fld input,.fld textarea{
  width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:10px;
  background:#fff;font-family:var(--font);font-size:15px;color:var(--ink);outline:none;resize:vertical;
  transition:border-color .15s,box-shadow .15s;
}
.fld input:focus,.fld textarea:focus{border-color:var(--teal);box-shadow:0 0 0 3px rgba(15,110,99,.12)}
.fld input::placeholder,.fld textarea::placeholder{color:#A8B4BE}
.hp{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}
.fineprint{margin:14px 0 0;font-size:12.5px;color:var(--ink-3)}

.searchbox{display:flex;gap:10px;max-width:640px;margin:0 0 32px}
.searchbox input{
  flex:1;padding:13px 16px;border:1px solid var(--line);border-radius:10px;
  font-family:var(--font);font-size:15.5px;outline:none;
}
.searchbox input:focus{border-color:var(--teal);box-shadow:0 0 0 3px rgba(15,110,99,.12)}

/* ── Empty / notices ──────────────────────────────────────── */
.empty,.notice{
  background:var(--band);border:1px solid var(--line);border-radius:var(--r);
  padding:clamp(28px,4vw,44px);max-width:720px;
}
.empty-h{margin:0 0 10px;font-size:20px;font-weight:800}
.empty-p{margin:0 0 20px;color:var(--ink-2);font-size:15.5px}
.notice-ok{background:var(--teal-l);border-color:#BFDCD7}
.notice-bad{background:#FDF0EE;border-color:#F3CFC8;color:#9B2C1B;font-weight:600;padding:16px 20px;margin-bottom:24px}

/* ── Pagination ───────────────────────────────────────────── */
.pagination{display:flex;align-items:center;justify-content:center;gap:16px;margin-top:40px}
.pagination a{
  padding:10px 18px;border:1px solid var(--line);border-radius:10px;background:#fff;
  text-decoration:none;font-weight:700;font-size:14px;
}
.pagination a:hover{border-color:var(--teal)}
.pg-now{font-size:14px;color:var(--ink-3);font-weight:600}

/* ── CTA band ─────────────────────────────────────────────── */
.cta-band{background:var(--teal);color:#fff}
.cta-in{display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;padding:clamp(32px,4vw,48px) 24px}
.cta-h{font-size:clamp(21px,2.6vw,28px);margin:0;color:#fff}
.cta-p{margin:8px 0 0;color:#CFE6E2;font-size:15.5px;max-width:56ch}

/* ── Footer ───────────────────────────────────────────────── */
.ftr{background:#0C1116;color:#9FB0BD;padding:clamp(40px,5vw,64px) 0 24px}
.ftr-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:clamp(24px,4vw,44px)}
.ftr-brand .brand-mark{margin-bottom:14px}
.ftr-name{margin:0;color:#fff;font-weight:800;font-size:16px}
.ftr-desc{margin:8px 0 0;font-size:14px;max-width:34ch}
.ftr-h{margin:0 0 14px;color:#fff;font-size:12px;font-weight:800;letter-spacing:.08em;text-transform:uppercase}
.ftr-list{list-style:none;margin:0;padding:0}
.ftr-list li{margin:0 0 10px;font-size:14px}
.ftr-list a{color:#9FB0BD;text-decoration:none}
.ftr-list a:hover{color:#fff}
.ftr-bar{
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  margin-top:clamp(32px,4vw,48px);padding-top:20px;border-top:1px solid #1D262E;font-size:13px;
}
.ftr-bar p{margin:0}

/* ── Responsive ───────────────────────────────────────────── */
@media (max-width:1080px){
  .layout,.contact{grid-template-columns:1fr}
  .side,.contact-side{position:static;flex-direction:row;flex-wrap:wrap}
  .side > *,.contact-side > *{flex:1 1 260px}
  .toc-side{display:none}
  .toc-inline{display:block;background:var(--band);border:1px solid var(--line);border-radius:var(--r);padding:18px 20px;margin:0 0 26px}
  .topics,.cards,.why{grid-template-columns:repeat(2,1fr)}
  .hero-in{grid-template-columns:1fr}
  .ftr-grid{grid-template-columns:1fr 1fr}
}

@media (max-width:820px){
  .nav,.hsearch{display:none}
  .burger{
    display:flex;flex-direction:column;justify-content:center;gap:4px;
    width:40px;height:40px;border:1px solid var(--line);border-radius:10px;cursor:pointer;padding:0 9px;
  }
  .burger span{display:block;height:2px;background:var(--ink);border-radius:2px}
  /* The toggle simply lets the header wrap, so the dropdown needs no fixed
     offsets and cannot drift out of place as nav items are added. */
  .nav-state:checked ~ .hdr .hdr-in{flex-wrap:wrap;height:auto;padding-bottom:16px}
  .nav-state:checked ~ .hdr .nav{display:flex;flex-direction:column;gap:2px;order:3;width:100%;margin:8px 0 0}
  .nav-state:checked ~ .hdr .nav a{padding:11px 12px}
  .nav-state:checked ~ .hdr .hsearch{display:block;order:4;width:100%}
  .nav-state:checked ~ .hdr .hsearch input{width:100%}
  .nav-state:checked ~ .hdr .hsearch input:focus{width:100%}
  .feature{grid-template-columns:1fr}
  .feature-img{min-height:0;aspect-ratio:16/10}
}

@media (max-width:620px){
  .topics,.cards,.why,.row2,.hero-facts,.ftr-grid{grid-template-columns:1fr}
  .searchbox{flex-direction:column}
  .cta-in{flex-direction:column;align-items:flex-start}
}