/* ============================================================
   iLiving Home — Global Stylesheet
   Static site for EdgeOne Pages. No external dependencies.

   Brand palette — taken from the official design deck
   (iLiving_Homes_Presentation.pptx, Arial):
     Primary teal   #00BFB3   (eyebrow / stat figures / accent rule)
     Teal deep      #009E95   (hover / active)
     Teal tint      #E6FAF8   (surfaces)
     Ink            #1A1A1A   (headings)
     Body grey      #555555   (body copy)
     Caption grey   #777777   (stat labels, meta)
   Type rules: display headings are REGULAR weight (as in the deck),
   only eyebrows, stat figures, card titles and buttons are bold.
   Typeface: system UI stack (-apple-system first) with Arial fallback,
   so it renders natively on every device.
   ============================================================ */
:root{
  --ink:#1a1a1a;
  --ink-2:#14181a;
  --paper:#ffffff;
  --muted:#555555;
  --muted-2:#777777;
  --line:#e6e9ea;
  --teal:#00bfb3;
  --teal-dark:#009e95;
  --teal-light:#c0e8e8;
  --teal-soft:#e6faf8;
  --bg-alt:#f4f7f7;
  --radius:16px;
  --shadow:0 10px 30px rgba(11,15,16,.10);
  --shadow-sm:0 4px 14px rgba(11,15,16,.07);
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"PingFang SC","Microsoft YaHei",sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:var(--font);color:var(--ink);background:var(--paper);line-height:1.65;font-size:16px}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
h1,h2{line-height:1.1;letter-spacing:-.025em;font-weight:400}
h3{line-height:1.3;letter-spacing:-.01em;font-weight:700}
h1{font-size:clamp(2.9rem,6.6vw,5rem)}
h2{font-size:clamp(2rem,4.1vw,3.1rem)}
h3{font-size:1.16rem}
.accent-rule{height:3px;width:100%;background:var(--teal);border:0;margin:0}
.container{width:min(1180px,92%);margin-inline:auto}

/* ---------- buttons ---------- */
.btn{display:inline-block;padding:.72rem 1.5rem;border-radius:999px;font-weight:600;font-size:.95rem;
  border:2px solid transparent;transition:.2s;cursor:pointer;white-space:nowrap}
.btn-lg{padding:.9rem 1.9rem;font-size:1.02rem}
.btn-solid{background:var(--teal);color:#fff}
.btn-solid:hover{background:var(--teal-dark);transform:translateY(-2px);box-shadow:var(--shadow-sm)}
.btn-ghost{border-color:rgba(255,255,255,.65);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.14)}
.btn-ghost-dark{border-color:var(--ink);color:var(--ink)}
.btn-ghost-dark:hover{background:var(--ink);color:#fff}
.btn-outline{border-color:var(--teal);color:var(--teal-dark)}
.btn-outline:hover{background:var(--teal);color:#fff}

/* ---------- header ---------- */
.site-header{position:fixed;inset:0 0 auto 0;z-index:100;background:rgba(255,255,255,.94);
  backdrop-filter:blur(12px);border-bottom:1px solid var(--line);transition:.25s}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;height:76px}
.brand img{height:44px;width:auto}
.nav{display:flex;align-items:center;gap:1.6rem;font-weight:500;font-size:.95rem}
.nav a{position:relative;padding:.35rem 0;color:var(--ink-2)}
.nav a::after{content:"";position:absolute;left:0;bottom:0;height:2px;width:0;background:var(--teal);transition:.25s}
.nav a:hover::after,.nav a.active::after{width:100%}
.nav-cta{margin-left:.4rem}
.nav-cta::after{display:none}
.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:0;padding:8px;cursor:pointer}
.nav-toggle span{width:24px;height:2.5px;background:var(--ink);border-radius:2px;transition:.25s}
body.nav-open .nav-toggle span:nth-child(1){transform:translateY(7.5px) rotate(45deg)}
body.nav-open .nav-toggle span:nth-child(2){opacity:0}
body.nav-open .nav-toggle span:nth-child(3){transform:translateY(-7.5px) rotate(-45deg)}
body.nav-open .nav-toggle span{background:#fff}

/* ---------- hero ---------- */
.hero{position:relative;min-height:92vh;display:flex;align-items:flex-end;color:#fff;overflow:hidden}
.hero-img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.hero-overlay{position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(10,16,20,.28) 0%,rgba(10,16,20,.38) 45%,rgba(10,16,20,.86) 100%)}
.hero-content{position:relative;z-index:2;padding:150px 0 56px}
.eyebrow{font-size:.8rem;font-weight:700;letter-spacing:.22em;text-transform:uppercase;color:var(--teal)}
.eyebrow-light{color:var(--teal)}
.hero h1{margin:.6rem 0 1rem}
.hero-sub{max-width:620px;font-size:1.08rem;color:rgba(255,255,255,.88)}
.hero-cta{display:flex;gap:.9rem;margin-top:1.6rem;flex-wrap:wrap}
.hero-cta.center{justify-content:center}
.hero-stats{display:flex;gap:2.6rem;margin-top:2.6rem;padding-top:1.6rem;
  border-top:1px solid rgba(255,255,255,.25);flex-wrap:wrap}
.hero-stats strong{font-size:2.1rem;font-weight:700;display:block;line-height:1.1;color:var(--teal)}
.hero-stats span{font-size:.85rem;color:rgba(255,255,255,.72);letter-spacing:.02em}

/* ---------- sections ---------- */
.section{padding:96px 0}
.section-alt{background:var(--bg-alt)}
.section-dark{background:var(--ink);color:#fff}
.section-dark h2{color:#fff}
.section-head{max-width:720px;margin-bottom:3rem}
.section-head.center{margin-inline:auto;text-align:center}
.section-sub{color:var(--muted);margin-top:.8rem;font-size:1.05rem;max-width:68ch}
.section-dark .section-sub{color:rgba(255,255,255,.72)}

/* ---------- pillars ---------- */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:1.6rem}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:1.4rem}
.pillar{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;
  transition:.25s;display:flex;flex-direction:column}
.pillar:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
.pillar-img{aspect-ratio:16/10;overflow:hidden}
.pillar-img img{width:100%;height:100%;object-fit:cover;transition:.5s}
.pillar:hover .pillar-img img{transform:scale(1.05)}
.pillar-body{padding:1.6rem 1.7rem 1.8rem;position:relative}
.pillar-num{position:absolute;top:1rem;right:1.3rem;font-size:.78rem;font-weight:700;
  color:var(--teal);letter-spacing:.18em;line-height:1}
.pillar h3{margin:.2rem 0 .6rem}
.pillar p{color:var(--muted);font-size:.95rem;line-height:1.6}
.link-arrow{display:inline-block;margin-top:1rem;font-weight:600;color:var(--teal-dark);font-size:.93rem}

/* ---------- technology ---------- */
.tech-grid{display:grid;grid-template-columns:1fr 1fr;gap:1.6rem}
.tech-card{background:var(--ink-2);border:1px solid rgba(255,255,255,.08);border-radius:var(--radius);
  overflow:hidden;display:flex;flex-direction:column}
.tech-card img{aspect-ratio:16/9;object-fit:cover;width:100%}
.tech-body{padding:1.7rem}
.tech-body h3{color:#fff;margin-bottom:.6rem;letter-spacing:.06em;font-size:1.05rem}
.tech-body p{color:rgba(255,255,255,.75);font-size:.96rem}
.section-dark .link-arrow{color:var(--teal)}
.ticks{list-style:none;margin-top:1rem}
.ticks li{padding-left:1.4rem;position:relative;color:rgba(255,255,255,.85);font-size:.92rem;margin:.35rem 0}
.ticks li::before{content:"✓";position:absolute;left:0;color:var(--teal);font-weight:700}

/* ---------- materials ---------- */
.mat-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;
  transition:.25s;display:block}
.mat-card:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.mat-card img{aspect-ratio:4/3;object-fit:cover;width:100%}
.mat-card h3{padding:1.1rem 1.2rem .3rem;font-weight:700;font-size:1.05rem}
.mat-card p{padding:0 1.2rem 1.3rem;color:var(--muted);font-size:.9rem;line-height:1.55}

/* ---------- why ---------- */
.why{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:1.7rem;
  transition:.25s}
.why:hover{box-shadow:var(--shadow-sm)}
.why-num{display:block;font-size:.78rem;font-weight:700;letter-spacing:.18em;color:var(--teal);margin-bottom:.7rem}
.why h3{margin-bottom:.4rem;font-size:1rem;letter-spacing:.1em;text-transform:uppercase}
.why p{color:var(--muted);font-size:.92rem}

/* ---------- split ---------- */
.split{display:grid;grid-template-columns:1.05fr 1fr;gap:3.4rem;align-items:center}
.split-media img{border-radius:var(--radius);box-shadow:var(--shadow);aspect-ratio:4/3;object-fit:cover;width:100%}
.split-body h2{margin:.6rem 0 1.1rem}
.split-body p{color:var(--muted);margin-bottom:.9rem}
.split-body .btn{margin-top:.8rem}

/* ---------- cta band ---------- */
.cta-band{background:linear-gradient(120deg,var(--teal-dark),var(--teal));color:#fff;
  padding:88px 0;text-align:center}
.cta-band h2{color:#fff;margin-bottom:.6rem}
.cta-band p{color:rgba(255,255,255,.85);font-size:1.06rem}
.cta-band .hero-cta{justify-content:center;margin-top:1.8rem}
.cta-band .btn-ghost-dark{border-color:#fff;color:#fff}
.cta-band .btn-ghost-dark:hover{background:#fff;color:var(--teal-dark)}

/* ---------- footer ---------- */
.site-footer{background:var(--ink);color:rgba(255,255,255,.78);padding:64px 0 0;font-size:.93rem}
.foot-wrap{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:2.4rem;padding-bottom:2.6rem}
.foot-logo{display:flex;align-items:center;gap:.65rem;margin-bottom:1rem}
.foot-logo img{height:38px;width:38px}
.foot-logo span{color:#fff;font-weight:700;font-size:1.08rem;letter-spacing:.01em}
.foot-brand p{color:rgba(255,255,255,.55)}
.foot-col h4{color:#fff;font-size:.8rem;letter-spacing:.16em;text-transform:uppercase;margin-bottom:1rem;font-weight:700}
.foot-col a,.foot-col span{display:block;margin:.4rem 0;color:rgba(255,255,255,.72)}
.foot-col a:hover{color:var(--teal)}
.foot-base{display:flex;justify-content:space-between;padding:1.2rem 0;
  border-top:1px solid rgba(255,255,255,.1);color:rgba(255,255,255,.4);font-size:.85rem;flex-wrap:wrap;gap:.5rem}

/* ---------- interior page hero (shorter than home hero) ---------- */
.page-hero{position:relative;min-height:60vh;display:flex;align-items:flex-end;color:#fff;overflow:hidden}
.page-hero .hero-img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.page-hero .hero-overlay{position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(10,16,20,.45) 0%,rgba(10,16,20,.55) 45%,rgba(10,16,20,.9) 100%)}
.page-hero .hero-content{padding:134px 0 52px}
.page-hero h1{font-size:clamp(2.25rem,4.7vw,3.5rem);margin:.55rem 0 .85rem}
.page-hero .hero-sub{max-width:660px;font-size:1.05rem;color:rgba(255,255,255,.88)}

/* ---------- breadcrumb ---------- */
.crumbs{font-size:.8rem;color:rgba(255,255,255,.6);margin-bottom:.9rem;letter-spacing:.05em}
.crumbs a:hover{color:var(--teal)}
.crumbs span{padding:0 .45rem;opacity:.55}

/* ---------- split variants ---------- */
.split-body-first{grid-template-columns:1fr 1.05fr}
.split-body .eyebrow{margin-bottom:.2rem}
.split-body h2{margin:.35rem 0 1rem}
ul.ticks-light{margin:1.1rem 0 0}
ul.ticks-light li{color:var(--muted)}
.split-body ul.ticks-light{margin-bottom:1.4rem}

/* ---------- large platform cards ---------- */
.plat-grid{display:grid;grid-template-columns:1fr 1fr;gap:1.6rem}
.plat{position:relative;display:block;border-radius:var(--radius);overflow:hidden;
  border:1px solid var(--line);transition:.25s;min-height:380px}
.plat>img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;
  transition:transform .6s ease}
.plat::after{content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(10,16,20,.2) 0%,rgba(10,16,20,.62) 52%,rgba(10,16,20,.9) 100%)}
.plat:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.plat:hover>img{transform:scale(1.05)}
.plat-body{position:relative;z-index:2;padding:1.8rem;min-height:380px;display:flex;
  flex-direction:column;justify-content:flex-end;color:#fff}
.plat-code{font-size:.76rem;font-weight:700;letter-spacing:.2em;color:var(--teal);margin-bottom:.55rem}
.plat h3{color:#fff;font-size:1.32rem;margin-bottom:.55rem}
.plat p{color:rgba(255,255,255,.84);font-size:.93rem;line-height:1.6}
.plat .link-arrow{color:var(--teal);margin-top:.9rem}

/* ---------- comparison table ---------- */
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius);background:#fff}
table.cmp{width:100%;border-collapse:collapse;min-width:640px}
table.cmp th,table.cmp td{padding:.95rem 1.25rem;text-align:left;font-size:.93rem;
  border-bottom:1px solid var(--line);vertical-align:top}
table.cmp thead th{background:var(--teal-soft);font-weight:700;font-size:.78rem;
  letter-spacing:.13em;text-transform:uppercase;color:var(--teal-dark)}
table.cmp thead th:first-child{color:var(--muted-2)}
table.cmp tbody th{font-weight:600;color:var(--ink);width:28%}
table.cmp tbody td{color:var(--muted)}
table.cmp tbody tr:last-child th,table.cmp tbody tr:last-child td{border-bottom:0}
table.cmp tbody tr:hover{background:#fafcfc}

/* comparison table inside a dark section */
.section-dark .table-wrap{background:transparent;border-color:rgba(255,255,255,.14)}
.section-dark table.cmp thead th{background:rgba(0,191,179,.14);color:var(--teal)}
.section-dark table.cmp thead th:first-child{color:rgba(255,255,255,.6)}
.section-dark table.cmp th,.section-dark table.cmp td{border-bottom-color:rgba(255,255,255,.12)}
.section-dark table.cmp tbody th{color:#fff}
.section-dark table.cmp tbody td{color:rgba(255,255,255,.72)}
.section-dark table.cmp tbody td strong{color:#fff}
.section-dark table.cmp tbody tr:hover{background:rgba(255,255,255,.03)}

/* ---------- key/value spec list (dl) ---------- */
.kv{margin-top:1.1rem;border-top:1px solid var(--line)}
.kv div{display:flex;justify-content:space-between;gap:1.2rem;padding:.62rem 0;border-bottom:1px solid var(--line)}
.kv dt{color:var(--muted-2);font-size:.88rem}
.kv dd{color:var(--ink);font-weight:600;font-size:.9rem;text-align:right;margin:0}
.section-dark .kv,.section-dark .kv div{border-color:rgba(255,255,255,.14)}
.section-dark .kv dt{color:rgba(255,255,255,.6)}
.section-dark .kv dd{color:#fff}

/* ---------- standards tags ---------- */
.tagrow{display:flex;flex-wrap:wrap;gap:.5rem;margin-top:1.15rem}
.tag{display:inline-block;padding:.34rem .82rem;border-radius:999px;border:1px solid var(--line);
  background:#fff;font-size:.77rem;font-weight:600;color:var(--muted-2);letter-spacing:.02em}
.section-dark .tag{background:rgba(255,255,255,.06);border-color:rgba(255,255,255,.16);
  color:rgba(255,255,255,.74)}

/* ---------- engineering notes (honest constraints) ---------- */
.notes-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:1.2rem}
.note{background:#fff;border:1px solid var(--line);border-left:3px solid var(--teal);
  border-radius:12px;padding:1.3rem 1.45rem}
.note h3{font-size:.96rem;letter-spacing:.01em;margin-bottom:.42rem;text-transform:none;color:var(--ink)}
.note p{color:var(--muted);font-size:.9rem;line-height:1.6}
.section-dark .note{background:var(--ink-2);border-color:rgba(255,255,255,.1);border-left-color:var(--teal)}
.section-dark .note h3{color:#fff}
.section-dark .note p{color:rgba(255,255,255,.72)}

/* ---------- comparison table: spec variant ---------- */
table.cmp.specs thead th{text-transform:none;letter-spacing:.02em;font-size:.82rem;color:var(--ink)}
table.cmp.specs thead th:first-child{font-size:.82rem}
table.cmp.specs tbody th{width:31%}
table.cmp.specs tbody td strong{color:var(--ink);font-weight:600}

/* ---------- stats band ---------- */
.stats-band{display:grid;grid-template-columns:repeat(4,1fr);gap:2rem;text-align:center}
.stats-band strong{display:block;font-size:clamp(1.9rem,3.4vw,2.6rem);font-weight:700;
  color:var(--teal);line-height:1.1;margin-bottom:.45rem}
.stats-band span{font-size:.85rem;color:var(--muted-2);letter-spacing:.03em}
.section-dark .stats-band span{color:rgba(255,255,255,.7)}
.section-dark .stats-band{border-top:1px solid rgba(255,255,255,.12);padding-top:2.6rem;margin-top:1rem}

/* ---------- reveal animation ---------- */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .7s ease,transform .7s ease}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  html{scroll-behavior:auto}
}

/* ---------- responsive ---------- */
@media (max-width:1000px){
  .grid-3{grid-template-columns:1fr 1fr}
  .grid-4{grid-template-columns:1fr 1fr}
  .tech-grid,.split,.split-body-first,.plat-grid{grid-template-columns:1fr}
  .foot-wrap{grid-template-columns:1fr 1fr}
  .stats-band{grid-template-columns:1fr 1fr;gap:1.6rem}
  .notes-grid{grid-template-columns:1fr}
  .plat{min-height:320px}
  .plat-body{min-height:320px}
}
@media (max-width:720px){
  .nav{position:fixed;inset:0;background:rgba(12,20,26,.97);flex-direction:column;
    justify-content:center;gap:1.6rem;font-size:1.25rem;opacity:0;pointer-events:none;transition:.3s}
  body.nav-open .nav{opacity:1;pointer-events:auto}
  body.nav-open{overflow:hidden}
  body.nav-open .nav a{color:#fff}
  .nav-toggle{display:flex;position:relative;z-index:110}
  .grid-3,.grid-4{grid-template-columns:1fr}
  .hero{min-height:88vh}
  .page-hero{min-height:48vh}
  .page-hero .hero-content{padding:118px 0 40px}
  .stats-band{grid-template-columns:1fr 1fr;gap:1.3rem}
  .stats-band strong{font-size:1.65rem}
  .hero-stats{gap:1.4rem}
  .hero-stats strong{font-size:1.5rem}
  .section{padding:68px 0}
  .foot-wrap{grid-template-columns:1fr}
}