/* ============ RESET & BASE ============ */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:'Inter',system-ui,-apple-system,sans-serif;
  font-size:16px;line-height:1.7;
  color:#d6e4f5;
  background:#030814;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
img,svg{max-width:100%;display:block}
a{color:inherit;text-decoration:none;transition:color .2s}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}
ul,ol{list-style:none}
h1,h2,h3,h4{font-family:'Space Grotesk',sans-serif;font-weight:600;line-height:1.25;color:#fff;letter-spacing:-.02em}

:root{
  --bg-0:#030814;
  --bg-1:#061428;
  --bg-2:#0a1f3d;
  --ice-1:#6ed3ff;
  --ice-2:#38b6ff;
  --ice-3:#0ea5e9;
  --frost:#b8e4ff;
  --mint:#7dd3c4;
  --glow:#00d4ff;
  --accent:#f0f9ff;
  --text-0:#ffffff;
  --text-1:#c7d8ec;
  --text-2:#8aa0bd;
  --text-3:#556883;
  --glass:rgba(14,31,60,.45);
  --glass-brd:rgba(110,211,255,.18);
  --shadow-lg:0 30px 80px -20px rgba(0,100,180,.35);
  --shadow-glow:0 0 40px rgba(56,182,255,.25);
  --radius-sm:10px;
  --radius-md:18px;
  --radius-lg:28px;
}

/* ============ AMBIENT ============ */
.ambient-bg{
  position:fixed;inset:0;z-index:-2;overflow:hidden;pointer-events:none;
}
.ambient-bg::before{
  content:"";position:absolute;inset:0;
  background:
    radial-gradient(ellipse at 20% 10%,rgba(14,165,233,.18),transparent 55%),
    radial-gradient(ellipse at 80% 70%,rgba(125,211,196,.12),transparent 55%),
    linear-gradient(180deg,#030814 0%,#061428 50%,#030814 100%);
}
.orb{
  position:absolute;border-radius:50%;filter:blur(80px);opacity:.35;
  animation:floatOrb 20s ease-in-out infinite;
}
.orb-1{width:520px;height:520px;background:radial-gradient(circle,#0ea5e9,transparent);top:-10%;left:-10%}
.orb-2{width:420px;height:420px;background:radial-gradient(circle,#7dd3c4,transparent);top:40%;right:-8%;animation-delay:-7s}
.orb-3{width:380px;height:380px;background:radial-gradient(circle,#38b6ff,transparent);bottom:-10%;left:30%;animation-delay:-14s}
@keyframes floatOrb{
  0%,100%{transform:translate(0,0) scale(1)}
  33%{transform:translate(40px,-30px) scale(1.1)}
  66%{transform:translate(-30px,40px) scale(.95)}
}
#snowCanvas{position:absolute;inset:0;width:100%;height:100%}

/* ============ PROGRESS BAR ============ */
.progress-bar{
  position:fixed;top:0;left:0;height:3px;width:0;z-index:100;
  background:linear-gradient(90deg,var(--ice-3),var(--ice-1),var(--mint));
  box-shadow:0 0 10px var(--glow);
  transition:width .1s linear;
}

/* ============ NAV ============ */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:50;
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  background:linear-gradient(180deg,rgba(3,8,20,.75),rgba(3,8,20,.4));
  border-bottom:1px solid rgba(110,211,255,.08);
}
.nav-container{
  max-width:1280px;margin:0 auto;padding:18px 28px;
  display:flex;align-items:center;justify-content:space-between;gap:24px;
}
.logo{display:flex;align-items:center;gap:12px}
.logo-mark{
  width:44px;height:44px;border-radius:12px;
  background:linear-gradient(135deg,var(--ice-2),var(--ice-3));
  display:grid;place-items:center;color:#030814;font-weight:700;font-size:22px;
  box-shadow:0 8px 24px rgba(14,165,233,.35),inset 0 1px 0 rgba(255,255,255,.3);
  position:relative;overflow:hidden;
}
.logo-mark::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(115deg,transparent 35%,rgba(255,255,255,.4) 50%,transparent 65%);
  transform:translateX(-100%);
  animation:sweep 4s ease-in-out infinite;
}
@keyframes sweep{0%,100%{transform:translateX(-100%)}50%{transform:translateX(100%)}}
.logo-name{font-family:'Space Grotesk',sans-serif;font-weight:700;font-size:18px;color:#fff;letter-spacing:.01em;display:block}
.logo-tag{font-size:11px;color:var(--text-2);letter-spacing:.08em;text-transform:uppercase}
.nav-links{display:flex;gap:6px;align-items:center}
.nav-links a{
  padding:10px 16px;border-radius:10px;font-size:14px;font-weight:500;color:var(--text-1);
  transition:all .2s;
}
.nav-links a:not(.nav-cta):hover{color:#fff;background:rgba(110,211,255,.08)}
.nav-cta{
  background:linear-gradient(135deg,var(--ice-2),var(--ice-3));
  color:#030814!important;font-weight:600;
  box-shadow:0 8px 20px rgba(14,165,233,.35);
}
.nav-cta:hover{transform:translateY(-1px);box-shadow:0 12px 28px rgba(14,165,233,.5)}
.nav-toggle{display:none;flex-direction:column;gap:5px;padding:8px}
.nav-toggle span{width:22px;height:2px;background:#fff;border-radius:2px;transition:all .2s}

/* ============ HERO ============ */
.hero{
  padding:160px 28px 80px;
  position:relative;
}
.hero-grid{
  max-width:1280px;margin:0 auto;
  display:grid;grid-template-columns:1.1fr .9fr;gap:60px;align-items:center;
}
.hero-badge{
  display:inline-flex;align-items:center;gap:10px;
  padding:8px 16px;border-radius:100px;
  background:rgba(110,211,255,.08);
  border:1px solid var(--glass-brd);
  font-size:13px;color:var(--frost);font-weight:500;
  margin-bottom:24px;
  backdrop-filter:blur(10px);
}
.badge-dot{width:8px;height:8px;border-radius:50%;background:var(--mint);box-shadow:0 0 12px var(--mint);animation:pulse 2s ease-in-out infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.4}}
.hero h1{
  font-size:clamp(2.2rem,5vw,3.75rem);
  line-height:1.1;letter-spacing:-.03em;
  margin-bottom:24px;
  background:linear-gradient(180deg,#fff 0%,#b8e4ff 100%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero-lead{
  font-size:1.1rem;color:var(--text-1);max-width:580px;margin-bottom:36px;
}
.hero-ctas{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:36px}
.btn{
  display:inline-flex;align-items:center;gap:10px;
  padding:15px 26px;border-radius:14px;
  font-weight:600;font-size:15px;
  transition:all .25s;
  border:1px solid transparent;
}
.btn-ic{font-size:16px}
.btn-primary{
  background:linear-gradient(135deg,var(--ice-2),var(--ice-3));
  color:#030814;
  box-shadow:0 10px 30px rgba(14,165,233,.4),inset 0 1px 0 rgba(255,255,255,.3);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 40px rgba(14,165,233,.55)}
.btn-ghost{
  background:rgba(255,255,255,.04);
  border-color:var(--glass-brd);
  color:#fff;
  backdrop-filter:blur(10px);
}
.btn-ghost:hover{background:rgba(110,211,255,.1);border-color:var(--ice-1)}
.btn-arrow{display:inline-block;transition:transform .2s}
.btn-ghost:hover .btn-arrow{transform:translateX(4px)}
.btn-lg{padding:18px 32px;font-size:16px}
.hero-trust{display:flex;flex-wrap:wrap;gap:20px}
.trust-item{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--text-1)}
.trust-item svg{color:var(--mint)}

/* ============ HERO VISUAL — FREEZER ============ */
.hero-visual{
  perspective:1400px;
  display:flex;justify-content:center;
}
.freezer-unit{
  width:100%;max-width:420px;
  transform-style:preserve-3d;
  animation:freezerFloat 6s ease-in-out infinite;
  filter:drop-shadow(0 40px 60px rgba(0,100,180,.4));
}
@keyframes freezerFloat{
  0%,100%{transform:rotateY(-8deg) rotateX(4deg) translateY(0)}
  50%{transform:rotateY(-8deg) rotateX(4deg) translateY(-14px)}
}
.freezer-door{
  position:relative;
  aspect-ratio:3/4;
  background:linear-gradient(145deg,#1a3860 0%,#0a1f3d 50%,#061428 100%);
  border-radius:var(--radius-lg);
  border:1px solid rgba(110,211,255,.25);
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,.1),
    inset 0 -20px 40px rgba(0,0,0,.4),
    0 0 80px rgba(14,165,233,.2);
  overflow:hidden;
}
.frost-layer{
  position:absolute;inset:0;
  background:
    radial-gradient(ellipse at 20% 30%,rgba(255,255,255,.15),transparent 40%),
    radial-gradient(ellipse at 80% 70%,rgba(184,228,255,.1),transparent 45%),
    radial-gradient(ellipse at 50% 90%,rgba(110,211,255,.08),transparent 40%);
  mix-blend-mode:screen;
}
.temp-display{
  position:absolute;top:24px;left:24px;
  background:rgba(3,8,20,.7);
  border:1px solid var(--glass-brd);
  border-radius:14px;padding:14px 18px;
  backdrop-filter:blur(10px);
  display:flex;flex-direction:column;gap:2px;
  box-shadow:0 8px 24px rgba(0,0,0,.3);
}
.temp-label{font-size:11px;color:var(--text-2);letter-spacing:.1em;text-transform:uppercase}
.temp-value{font-family:'Space Grotesk',sans-serif;font-size:28px;font-weight:700;color:var(--ice-1);line-height:1;text-shadow:0 0 16px var(--glow)}
.temp-sub{font-size:11px;color:var(--text-3)}

.frost-crystal{
  position:absolute;color:rgba(255,255,255,.7);
  animation:spin 20s linear infinite;
}
.frost-crystal::before,.frost-crystal::after{
  content:"";position:absolute;background:#fff;border-radius:1px;
  box-shadow:0 0 8px rgba(255,255,255,.8);
}
.frost-crystal::before{width:2px;height:100%;left:50%;transform:translateX(-50%)}
.frost-crystal::after{width:100%;height:2px;top:50%;transform:translateY(-50%)}
.c1{top:50%;left:60%;width:40px;height:40px;animation-duration:18s}
.c2{top:70%;left:30%;width:28px;height:28px;animation-duration:24s}
.c3{top:25%;left:75%;width:32px;height:32px;animation-duration:22s;animation-delay:-5s}
.c4{top:85%;left:70%;width:22px;height:22px;animation-duration:26s;animation-delay:-10s}
.c5{top:45%;left:20%;width:36px;height:36px;animation-duration:20s;animation-delay:-3s}
.c6{top:15%;left:45%;width:24px;height:24px;animation-duration:28s;animation-delay:-7s}
@keyframes spin{to{transform:rotate(360deg)}}

.air-flow{
  position:absolute;left:10%;right:10%;height:2px;
  background:linear-gradient(90deg,transparent,var(--ice-1),transparent);
  opacity:.5;
  animation:flowDown 4s linear infinite;
  box-shadow:0 0 12px var(--glow);
}
.air-flow{top:40%}
.af-2{top:60%;animation-delay:-1.5s}
.af-3{top:80%;animation-delay:-3s}
@keyframes flowDown{
  0%{transform:translateY(-100%);opacity:0}
  50%{opacity:.7}
  100%{transform:translateY(100%);opacity:0}
}

.freezer-base{
  margin-top:8px;padding:16px;
  background:linear-gradient(180deg,#0a1f3d,#061428);
  border-radius:var(--radius-md);
  border:1px solid rgba(110,211,255,.15);
  display:flex;gap:16px;align-items:center;
}
.compressor{
  width:60px;height:50px;border-radius:8px;
  background:radial-gradient(circle at 30% 30%,#3a5a82,#0a1f3d);
  border:1px solid rgba(110,211,255,.2);
  box-shadow:inset 0 2px 6px rgba(0,0,0,.5);
  position:relative;
}
.compressor::after{
  content:"";position:absolute;top:10px;left:10px;right:10px;bottom:10px;
  border-radius:50%;
  border:2px solid rgba(110,211,255,.3);
  animation:spin 3s linear infinite;
}
.coils{
  flex:1;height:40px;
  background:repeating-linear-gradient(90deg,
    rgba(110,211,255,.15) 0,rgba(110,211,255,.15) 3px,
    transparent 3px,transparent 8px);
  border-radius:4px;
  border:1px solid rgba(110,211,255,.2);
}

/* ============ ARTICLE ============ */
.article-wrap{
  max-width:860px;margin:0 auto;padding:0 28px 80px;
  position:relative;
}
.article{
  background:var(--glass);
  backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  border:1px solid var(--glass-brd);
  border-radius:var(--radius-lg);
  padding:clamp(28px,5vw,56px);
  box-shadow:var(--shadow-lg);
}
.article-meta{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:28px}
.meta-chip{
  padding:6px 14px;border-radius:100px;font-size:12px;font-weight:500;
  background:rgba(110,211,255,.08);color:var(--frost);
  border:1px solid var(--glass-brd);
}
.article-intro{
  font-size:1.15rem;color:var(--text-1);
  border-left:3px solid var(--ice-2);
  padding-left:20px;margin-bottom:32px;
}
.article h2{
  font-size:clamp(1.6rem,3.5vw,2.1rem);
  margin:48px 0 20px;
  position:relative;
  padding-left:20px;
}
.article h2::before{
  content:"";position:absolute;left:0;top:8px;bottom:8px;width:4px;border-radius:2px;
  background:linear-gradient(180deg,var(--ice-1),var(--ice-3));
  box-shadow:0 0 12px var(--glow);
}
.article h3{
  font-size:1.25rem;margin:32px 0 14px;color:var(--frost);
}
.article p{margin-bottom:18px;color:var(--text-1)}
.article a{
  color:var(--ice-1);font-weight:600;
  background:linear-gradient(180deg,transparent 60%,rgba(110,211,255,.2) 60%);
  transition:background .2s;
}
.article a:hover{background:linear-gradient(180deg,transparent 30%,rgba(110,211,255,.35) 30%)}
.article strong{color:#fff;font-weight:600}

.article-list{
  margin:20px 0 24px;
  padding-left:6px;
  display:flex;flex-direction:column;gap:14px;
}
.article-list li{
  padding:14px 18px 14px 48px;
  background:rgba(110,211,255,.05);
  border:1px solid var(--glass-brd);
  border-radius:var(--radius-sm);
  color:var(--text-1);
  position:relative;
  transition:all .2s;
}
.article-list li:hover{background:rgba(110,211,255,.09);transform:translateX(4px)}
.article-list li::before{
  content:"";position:absolute;left:18px;top:18px;
  width:18px;height:18px;border-radius:50%;
  background:linear-gradient(135deg,var(--ice-2),var(--ice-3));
  box-shadow:0 0 12px rgba(14,165,233,.5);
}
.article-list li::after{
  content:"";position:absolute;left:23px;top:24px;
  width:4px;height:7px;border-right:2px solid #fff;border-bottom:2px solid #fff;
  transform:rotate(45deg);
}
ol.article-list{counter-reset:list;list-style:none}
ol.article-list li::before{
  content:counter(list);counter-increment:list;
  color:#030814;font-weight:700;font-size:12px;
  display:grid;place-items:center;
}
ol.article-list li::after{display:none}

/* ============ STATS ============ */
.stats-grid{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));
  gap:16px;margin:48px 0;
}
.stat-card{
  padding:28px 20px;text-align:center;
  border-radius:var(--radius-md);
  transition:transform .3s;
}
.stat-card:hover{transform:translateY(-4px)}
.stat-number{
  font-family:'Space Grotesk',sans-serif;
  font-size:clamp(2.2rem,4vw,3rem);font-weight:700;
  background:linear-gradient(180deg,var(--ice-1),var(--ice-3));
  -webkit-background-clip:text;background-clip:text;color:transparent;
  line-height:1;margin-bottom:8px;
  display:block;
}
.stat-number::after{content:"";display:inline;margin-left:2px}
.stat-label{font-size:13px;color:var(--text-2);line-height:1.4}

/* ============ GLASS ============ */
.glass{
  background:var(--glass);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border:1px solid var(--glass-brd);
}

/* ============ FAQ ============ */
.faq-wrap{margin-top:24px;display:flex;flex-direction:column;gap:12px}
.faq-item{
  background:rgba(110,211,255,.04);
  border:1px solid var(--glass-brd);
  border-radius:var(--radius-md);
  overflow:hidden;
  transition:all .25s;
}
.faq-item[open]{background:rgba(110,211,255,.08);border-color:var(--ice-2)}
.faq-item summary{
  padding:22px 56px 22px 24px;
  font-weight:600;color:#fff;
  cursor:pointer;list-style:none;
  position:relative;
  font-size:1.05rem;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:"";position:absolute;right:24px;top:50%;
  width:12px;height:12px;
  border-right:2px solid var(--ice-1);border-bottom:2px solid var(--ice-1);
  transform:translateY(-70%) rotate(45deg);
  transition:transform .25s;
}
.faq-item[open] summary::after{transform:translateY(-30%) rotate(-135deg)}
.faq-answer{padding:0 24px 22px;color:var(--text-1);font-size:.98rem;line-height:1.7}
.faq-answer p{margin-bottom:0}

/* ============ CTA SECTION ============ */
.cta-section{
  max-width:1100px;margin:0 auto;padding:40px 28px 80px;
}
.cta-card{
  border-radius:var(--radius-lg);
  padding:clamp(40px,6vw,72px);
  text-align:center;
  position:relative;overflow:hidden;
  box-shadow:var(--shadow-lg);
}
.cta-card::before{
  content:"";position:absolute;inset:0;
  background:
    radial-gradient(circle at 20% 30%,rgba(14,165,233,.18),transparent 50%),
    radial-gradient(circle at 80% 70%,rgba(125,211,196,.12),transparent 50%);
  pointer-events:none;
}
.cta-inner{position:relative;z-index:1}
.cta-icon-wrap{display:flex;justify-content:center;margin-bottom:24px}
.cta-icon{
  width:80px;height:80px;border-radius:24px;
  background:linear-gradient(135deg,var(--ice-2),var(--ice-3));
  display:grid;place-items:center;color:#030814;
  box-shadow:0 20px 50px rgba(14,165,233,.4),0 0 40px rgba(14,165,233,.3);
  animation:iconFloat 4s ease-in-out infinite;
}
@keyframes iconFloat{0%,100%{transform:translateY(0)}50%{transform:translateY(-8px)}}
.cta-icon svg{width:40px;height:40px}
.cta-card h2{
  font-size:clamp(1.7rem,3.5vw,2.4rem);
  margin-bottom:16px;
  background:linear-gradient(180deg,#fff,#b8e4ff);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.cta-card p{color:var(--text-1);max-width:620px;margin:0 auto 32px;font-size:1.05rem}
.cta-actions{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}

/* ============ FOOTER ============ */
.site-footer{
  background:linear-gradient(180deg,transparent,rgba(3,8,20,.9));
  border-top:1px solid rgba(110,211,255,.08);
  padding:60px 28px 24px;
  margin-top:40px;
}
.footer-grid{
  max-width:1280px;margin:0 auto;
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:48px;
  padding-bottom:40px;
  border-bottom:1px solid rgba(110,211,255,.08);
}
.footer-desc{color:var(--text-2);font-size:.95rem;margin:20px 0;max-width:380px}
.social-row{display:flex;gap:10px;flex-wrap:wrap}
.social-row a{
  width:40px;height:40px;border-radius:12px;
  background:rgba(110,211,255,.06);
  border:1px solid var(--glass-brd);
  display:grid;place-items:center;color:var(--text-1);
  transition:all .25s;
}
.social-row a:hover{background:var(--ice-2);color:#030814;transform:translateY(-3px);box-shadow:0 10px 24px rgba(14,165,233,.4)}
.social-row svg{width:18px;height:18px}
.footer-col h4{
  font-family:'Space Grotesk',sans-serif;font-size:14px;
  letter-spacing:.1em;text-transform:uppercase;
  color:var(--frost);margin-bottom:18px;
}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col li,.footer-col a{color:var(--text-2);font-size:.94rem;transition:color .2s}
.footer-col a:hover{color:var(--ice-1)}
.footer-bottom{
  max-width:1280px;margin:0 auto;padding-top:24px;
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
  font-size:13px;color:var(--text-3);
}

/* ============ BACK TO TOP ============ */
.back-to-top{
  position:fixed;bottom:28px;right:28px;z-index:40;
  width:50px;height:50px;border-radius:16px;
  background:linear-gradient(135deg,var(--ice-2),var(--ice-3));
  color:#030814;
  box-shadow:0 10px 30px rgba(14,165,233,.4);
  display:grid;place-items:center;
  opacity:0;pointer-events:none;transform:translateY(20px);
  transition:all .3s;
}
.back-to-top.visible{opacity:1;pointer-events:auto;transform:translateY(0)}
.back-to-top:hover{transform:translateY(-4px);box-shadow:0 16px 40px rgba(14,165,233,.55)}
.back-to-top svg{width:22px;height:22px}

/* ============ RESPONSIVE ============ */
@media (max-width:960px){
  .hero-grid{grid-template-columns:1fr;gap:40px}
  .hero-visual{order:-1}
  .freezer-unit{max-width:320px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:720px){
  .nav-links{
    position:fixed;top:72px;left:16px;right:16px;
    flex-direction:column;align-items:stretch;gap:4px;
    background:rgba(6,20,40,.95);backdrop-filter:blur(20px);
    border:1px solid var(--glass-brd);border-radius:var(--radius-md);
    padding:14px;
    opacity:0;pointer-events:none;transform:translateY(-10px);
    transition:all .25s;
  }
  .nav-links.open{opacity:1;pointer-events:auto;transform:translateY(0)}
  .nav-links a{padding:14px 18px;border-radius:10px}
  .nav-toggle{display:flex}
  .hero{padding-top:120px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column;text-align:center}
  .cta-actions{flex-direction:column;width:100%}
  .btn-lg{width:100%;justify-content:center}
}

/* ============ ACCESSIBILITY / MOTION ============ */
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.01ms!important;
    animation-iteration-count:1!important;
    transition-duration:.01ms!important;
  }
  .freezer-unit,.orb{animation:none!important}
}

/* Focus states */
a:focus-visible,button:focus-visible,summary:focus-visible{
  outline:2px solid var(--ice-1);
  outline-offset:3px;
  border-radius:6px;
}

/* Selection */
::selection{background:rgba(14,165,233,.4);color:#fff}