/* ============================================================
   NusCoolWall™ — main stylesheet
   A Nusfun Pty Ltd product line — coolwall.nusfun.com
   ============================================================ */

:root{
  /* Brand palette — consistent with www.nusfun.com / solar.nusfun.com */
  --nc-navy:        #0d2b4e;
  --nc-navy-soft:   #1b3d63;
  --nc-green:       #0f7a5c;
  --nc-green-dark:  #0b5c45;
  --nc-green-tint:  #e6f2ec;
  --nc-red:         #c0392b;
  --nc-red-dark:    #a3301f;
  --nc-bg:          #f5f7f6;
  --nc-white:       #ffffff;
  --nc-text:        #1e2b2a;
  --nc-text-muted:  #5b6b6a;
  --nc-border:      #e1e7e4;

  --nc-radius:      10px;
  --nc-radius-lg:   18px;
  --nc-shadow:      0 4px 18px rgba(13,43,78,0.07);
  --nc-shadow-lg:   0 14px 40px rgba(13,43,78,0.12);
  --nc-container:   1180px;
}

*, *::before, *::after{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }
body{
  margin:0;
  font-family:'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  color:var(--nc-text);
  background:var(--nc-white);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
img{ max-width:100%; display:block; }
a{ color:inherit; text-decoration:none; }
ul{ margin:0; padding:0; list-style:none; }
h1,h2,h3,h4{ margin:0 0 .5em; line-height:1.2; font-weight:700; color:var(--nc-navy); }
p{ margin:0 0 1em; }
.container{ max-width:var(--nc-container); margin:0 auto; padding:0 24px; }

@media (prefers-reduced-motion: reduce){
  *{ animation-duration:0.01ms !important; transition-duration:0.01ms !important; }
}

/* ---------- Eyebrow / labels ---------- */
.eyebrow{
  display:inline-flex; align-items:center; gap:8px;
  font-size:0.78rem; font-weight:700; letter-spacing:.08em; text-transform:uppercase;
  color:var(--nc-green-dark); margin-bottom:14px;
}
.eyebrow::before{
  content:""; width:18px; height:2px; background:var(--nc-red); display:inline-block; border-radius:2px;
}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  padding:13px 26px; border-radius:999px; font-weight:600; font-size:0.96rem;
  border:2px solid transparent; cursor:pointer; transition:transform .15s ease, box-shadow .15s ease, background .15s ease;
  white-space:nowrap;
}
.btn:hover{ transform:translateY(-1px); }
.btn-primary{ background:var(--nc-red); color:#fff; box-shadow:0 8px 20px rgba(192,57,43,0.28); }
.btn-primary:hover{ background:var(--nc-red-dark); }
.btn-secondary{ background:transparent; border-color:var(--nc-navy); color:var(--nc-navy); }
.btn-secondary:hover{ background:var(--nc-navy); color:#fff; }
.btn-light{ background:#fff; color:var(--nc-navy); }
.btn-row{ display:flex; flex-wrap:wrap; gap:14px; margin-top:8px; }

/* ---------- Header ---------- */
.site-header{
  position:sticky; top:0; z-index:100;
  background:rgba(255,255,255,0.94); backdrop-filter:blur(8px);
  border-bottom:1px solid var(--nc-border);
}
.header-inner{
  display:flex; align-items:center; justify-content:space-between; gap:20px;
  padding:14px 24px; max-width:var(--nc-container); margin:0 auto;
}
.brand{ display:flex; align-items:center; gap:10px; }
.brand-mark{
  font-family:'Inter',sans-serif; font-weight:800; font-size:1.28rem; color:var(--nc-navy); letter-spacing:-.02em;
}
.brand-mark span{ color:var(--nc-green); }
.brand-sub{ font-size:.68rem; letter-spacing:.12em; text-transform:uppercase; color:var(--nc-text-muted); display:block; margin-top:1px;}

.main-nav{ display:flex; align-items:center; gap:26px; }
.main-nav a{ font-size:.94rem; font-weight:500; color:var(--nc-text); padding:6px 0; border-bottom:2px solid transparent; }
.main-nav a:hover, .main-nav a.active{ color:var(--nc-green-dark); border-color:var(--nc-red); }

.nusfun-link{
  display:flex; align-items:center; gap:8px; padding-left:18px; border-left:1px solid var(--nc-border);
  font-size:.82rem; color:var(--nc-text-muted);
}
.nusfun-link img{ height:22px; width:auto; }
.nusfun-link:hover{ color:var(--nc-navy); }

.nav-toggle{ display:none; background:none; border:none; font-size:1.5rem; color:var(--nc-navy); cursor:pointer; }

@media (max-width:920px){
  .main-nav{
    position:fixed; inset:64px 0 0 0; background:#fff; flex-direction:column; justify-content:flex-start;
    padding:24px; gap:6px; transform:translateX(100%); transition:transform .25s ease; overflow-y:auto;
  }
  .main-nav.open{ transform:translateX(0); }
  .main-nav a{ width:100%; padding:14px 4px; border-bottom:1px solid var(--nc-border); }
  .nusfun-link{ border-left:none; border-top:1px solid var(--nc-border); padding:16px 4px 0; margin-top:8px; width:100%; }
  .nav-toggle{ display:block; }
}

/* ---------- Hero ---------- */
.hero{
  position:relative;
  min-height:600px;
  display:flex; align-items:center;
  background:#0d2b4e;
  overflow:hidden;
}
.hero-bg{
  position:absolute; inset:0; width:100%; height:100%; object-fit:cover; z-index:0;
}
.hero-scrim{
  position:absolute; inset:0;
  background:linear-gradient(100deg, rgba(9,25,46,0.86) 0%, rgba(9,25,46,0.72) 32%, rgba(9,25,46,0.32) 58%, rgba(9,25,46,0.06) 78%);
  z-index:1;
}
.hero-inner{
  position:relative; z-index:2;
  padding:100px 0;
  width:100%;
}
.hero-copy{ max-width:620px; }
.hero-copy .eyebrow{ color:#8fd9c4; }
.hero-copy .eyebrow::before{ background:var(--nc-red); }
.hero-copy h1{ font-size:clamp(2.1rem,4vw,3.2rem); margin-bottom:.45em; color:#fff; }
.hero-copy p.lead{ font-size:1.14rem; color:#dbe6ee; max-width:52ch; }

@media (max-width:920px){
  .hero{ min-height:0; }
  .hero-scrim{ background:linear-gradient(180deg, rgba(9,25,46,0.35) 0%, rgba(9,25,46,0.82) 62%, rgba(9,25,46,0.92) 100%); }
  .hero-inner{ padding:200px 0 48px; }
}

/* ---------- Sections ---------- */
.section{ padding:76px 0; }
.section-alt{ background:var(--nc-bg); }
.section-head{ max-width:680px; margin-bottom:40px; }
.section-head.center{ margin-left:auto; margin-right:auto; text-align:center; }
.section-head p{ color:var(--nc-text-muted); font-size:1.04rem; }

/* ---------- Value / feature grid ---------- */
.grid-4{ display:grid; grid-template-columns:repeat(4,1fr); gap:22px; }
.grid-3{ display:grid; grid-template-columns:repeat(3,1fr); gap:22px; }
.grid-2{ display:grid; grid-template-columns:repeat(2,1fr); gap:22px; }
@media (max-width:980px){ .grid-4{ grid-template-columns:repeat(2,1fr);} .grid-3{grid-template-columns:repeat(2,1fr);} }
@media (max-width:620px){ .grid-4, .grid-3, .grid-2{ grid-template-columns:1fr; } }

.card{
  background:#fff; border:1px solid var(--nc-border); border-radius:var(--nc-radius-lg);
  padding:28px 24px; box-shadow:var(--nc-shadow);
}
.card .icon{
  width:48px; height:48px; border-radius:12px; background:var(--nc-green-tint);
  display:flex; align-items:center; justify-content:center; margin-bottom:16px; color:var(--nc-green-dark);
}
.card .icon svg{ width:26px; height:26px; }
.card h3{ font-size:1.08rem; margin-bottom:.4em; }
.card p{ color:var(--nc-text-muted); font-size:.96rem; margin-bottom:0; }

/* application cards with photo-illustration top */
.app-card{
  background:#fff; border:1px solid var(--nc-border); border-radius:var(--nc-radius-lg); overflow:hidden;
  box-shadow:var(--nc-shadow); display:flex; flex-direction:column;
}
.app-card .art{ aspect-ratio:16/10; background:var(--nc-green-tint); overflow:hidden; }
.app-card .art svg{ width:100%; height:100%; }
.app-card .art img{ width:100%; height:100%; object-fit:cover; display:block; }
.app-card .body{ padding:22px; }
.app-card h3{ font-size:1.05rem; margin-bottom:.35em; }
.app-card p{ color:var(--nc-text-muted); font-size:.94rem; margin-bottom:0; }

/* ---------- Numbered steps (process / how it works) ---------- */
.steps{ display:flex; flex-direction:column; gap:0; }
.step{ display:grid; grid-template-columns:64px 1fr; gap:20px; padding:22px 0; border-top:1px solid var(--nc-border); }
.step:first-child{ border-top:none; }
.step .num{ font-family:'Inter',sans-serif; font-weight:800; font-size:1.3rem; color:var(--nc-red); }
.step h3{ font-size:1.05rem; margin-bottom:.3em; }
.step p{ color:var(--nc-text-muted); margin-bottom:0; font-size:.96rem; }

/* horizontal step row for compact "how it works" */
.step-row{ display:grid; grid-template-columns:repeat(5,1fr); gap:16px; }
@media (max-width:980px){ .step-row{ grid-template-columns:repeat(2,1fr);} }
@media (max-width:560px){ .step-row{ grid-template-columns:1fr;} }
.step-row .step-card{
  background:#fff; border:1px solid var(--nc-border); border-radius:var(--nc-radius); padding:20px 16px; text-align:left;
}
.step-row .step-card .num{
  display:inline-flex; align-items:center; justify-content:center; width:30px; height:30px; border-radius:50%;
  background:var(--nc-navy); color:#fff; font-size:.85rem; font-weight:700; margin-bottom:12px;
}
.step-row .step-card p{ font-size:.9rem; color:var(--nc-text-muted); margin-bottom:0; }

/* ---------- Partner / CTA split ---------- */
.split{ display:grid; grid-template-columns:1fr 1fr; gap:48px; align-items:center; }
@media (max-width:920px){ .split{ grid-template-columns:1fr; } }
.split .art svg{ width:100%; height:auto; }
.partner-list{ display:flex; flex-direction:column; gap:12px; margin:22px 0 28px; }
.partner-list li{ display:flex; gap:10px; align-items:flex-start; font-size:.98rem; color:var(--nc-text); }
.partner-list li svg{ flex:none; width:20px; height:20px; color:var(--nc-green); margin-top:2px; }

/* ---------- CTA banner ---------- */
.cta-banner{
  background:var(--nc-navy); color:#fff; border-radius:var(--nc-radius-lg);
  padding:48px 40px; display:flex; flex-wrap:wrap; align-items:center; justify-content:space-between; gap:24px;
}
.cta-banner h2{ color:#fff; margin-bottom:.3em; font-size:1.6rem; }
.cta-banner p{ color:#c9d6e2; margin-bottom:0; max-width:48ch; }

/* ---------- Table (product spec) ---------- */
.spec-table{ width:100%; border-collapse:collapse; background:#fff; border-radius:var(--nc-radius-lg); overflow:hidden; box-shadow:var(--nc-shadow);}
.spec-table th, .spec-table td{ padding:14px 18px; border-bottom:1px solid var(--nc-border); text-align:left; font-size:.95rem; }
.spec-table th{ width:32%; background:var(--nc-bg); color:var(--nc-navy); font-weight:600; }
.spec-table tr:last-child td, .spec-table tr:last-child th{ border-bottom:none; }
.tbc{ color:var(--nc-text-muted); font-style:italic; }

/* ---------- Downloads ---------- */
.download-list{ display:flex; flex-direction:column; gap:14px; }
.download-item{
  display:flex; align-items:center; justify-content:space-between; gap:16px;
  background:#fff; border:1px solid var(--nc-border); border-radius:var(--nc-radius); padding:18px 20px; box-shadow:var(--nc-shadow);
}
.download-item .meta{ display:flex; gap:14px; align-items:center; }
.download-item .meta .icon{ width:40px; height:40px; border-radius:10px; background:var(--nc-green-tint); display:flex; align-items:center; justify-content:center; color:var(--nc-green-dark); }
.download-item h4{ margin:0 0 2px; font-size:.98rem; color:var(--nc-navy); }
.download-item span{ font-size:.85rem; color:var(--nc-text-muted); }
.pill{ font-size:.72rem; font-weight:700; text-transform:uppercase; letter-spacing:.05em; background:var(--nc-bg); color:var(--nc-text-muted); padding:4px 10px; border-radius:999px; }

/* ---------- Contact ---------- */
.contact-grid{ display:grid; grid-template-columns:1.1fr 0.9fr; gap:40px; }
@media (max-width:920px){ .contact-grid{ grid-template-columns:1fr; } }
.form-field{ margin-bottom:18px; }
.form-field label{ display:block; font-size:.88rem; font-weight:600; color:var(--nc-navy); margin-bottom:6px; }
.form-field input, .form-field select, .form-field textarea{
  width:100%; padding:12px 14px; border:1px solid var(--nc-border); border-radius:8px; font-family:inherit; font-size:.96rem; background:#fff;
}
.form-field textarea{ min-height:120px; resize:vertical; }
.contact-info-card{ background:var(--nc-navy); color:#fff; border-radius:var(--nc-radius-lg); padding:32px; }
.contact-info-card h3{ color:#fff; }
.contact-info-card a{ color:#fff; }
.contact-row{ display:flex; gap:12px; align-items:flex-start; padding:12px 0; border-top:1px solid rgba(255,255,255,0.14); }
.contact-row:first-of-type{ border-top:none; }
.contact-row svg{ flex:none; width:20px; height:20px; margin-top:2px; color:#9fd4c2; }

/* ---------- Disclaimer strip ---------- */
.disclaimer{
  background:var(--nc-bg); border-top:1px solid var(--nc-border); border-bottom:1px solid var(--nc-border);
  padding:18px 0; font-size:.84rem; color:var(--nc-text-muted); text-align:center;
}

/* ---------- Footer ---------- */
.site-footer{ background:var(--nc-navy); color:#c9d6e2; padding:64px 0 0; }
.footer-grid{ display:grid; grid-template-columns:1.4fr 1fr 1fr 1fr; gap:32px; padding-bottom:44px; border-bottom:1px solid rgba(255,255,255,0.12); }
@media (max-width:820px){ .footer-grid{ grid-template-columns:1fr 1fr; } }
@media (max-width:520px){ .footer-grid{ grid-template-columns:1fr; } }
.footer-grid h4{ color:#fff; font-size:.92rem; letter-spacing:.03em; margin-bottom:16px; }
.footer-grid ul li{ margin-bottom:10px; }
.footer-grid a{ color:#c9d6e2; font-size:.92rem; }
.footer-grid a:hover{ color:#fff; }
.footer-brand p{ color:#a9bccb; font-size:.92rem; max-width:36ch; }
.footer-bottom{
  display:flex; align-items:center; justify-content:space-between; flex-wrap:wrap; gap:12px;
  padding:22px 0; font-size:.84rem; color:#93a7b8;
}
.footer-powered{ display:flex; align-items:center; gap:8px; }
.footer-powered img{ height:20px; filter:brightness(0) invert(1); opacity:.85; }
.footer-legal{
  border-top:1px solid rgba(255,255,255,0.12); padding:18px 0 26px; font-size:.8rem; color:#8298ab; text-align:center;
}

/* ---------- Page hero (inner pages) ---------- */
.page-hero{ padding:52px 0 40px; background:var(--nc-bg); border-bottom:1px solid var(--nc-border); }
.page-hero h1{ font-size:clamp(1.7rem,3vw,2.4rem); margin-bottom:.3em; }
.page-hero p{ color:var(--nc-text-muted); max-width:64ch; font-size:1.05rem; margin-bottom:0; }
.breadcrumb{ font-size:.85rem; color:var(--nc-text-muted); margin-bottom:14px; }
.breadcrumb a{ color:var(--nc-green-dark); }

.page-hero-photo{
  position:relative; min-height:320px; display:flex; align-items:flex-end;
  background:#0d2b4e; overflow:hidden;
}
.page-hero-photo .hero-bg{ position:absolute; inset:0; width:100%; height:100%; object-fit:cover; }
.page-hero-photo .hero-scrim{
  position:absolute; inset:0;
  background:linear-gradient(180deg, rgba(9,25,46,0.15) 0%, rgba(9,25,46,0.82) 100%);
}
.page-hero-photo .container{ position:relative; z-index:2; padding-bottom:36px; }
.page-hero-photo h1{ color:#fff; }
.page-hero-photo p{ color:#dbe6ee; }
.page-hero-photo .breadcrumb{ color:#c9d6e2; }
.page-hero-photo .breadcrumb a{ color:#8fd9c4; }

.photo-frame{ border-radius:var(--nc-radius-lg); overflow:hidden; box-shadow:var(--nc-shadow-lg); }
.photo-frame img{ width:100%; height:100%; object-fit:cover; display:block; }

/* utility */
.text-center{ text-align:center; }
.mt-0{ margin-top:0; }
.mb-0{ margin-bottom:0; }
.badge{ display:inline-block; background:var(--nc-green-tint); color:var(--nc-green-dark); font-size:.78rem; font-weight:700; padding:5px 12px; border-radius:999px; margin-bottom:14px; letter-spacing:.02em; }