/* ============================================
   Silverfield AI — Atmospheric Depth Interface
   ============================================ */
:root{
  --bg-deep:#0a0e16;
  --bg-mid:#0d1320;
  --bg-island:#121a2b;
  --bg-island-soft:#16203450;
  --fog-1:#1a2540;
  --fog-2:#0e1626;
  --line:#2a3550;
  --text:#e7ecf6;
  --text-soft:#a9b4cc;
  --text-mute:#6b7795;
  --accent:#8ea3c9;
  --accent-deep:#5a6f9e;
  --accent-glow:#9fb3d8;
  --radius:20px;
  --radius-sm:12px;
  --maxw:1180px;
  --ease:cubic-bezier(.2,.7,.2,1);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
  background:var(--bg-deep);
  color:var(--text);
  line-height:1.65;
  overflow-x:hidden;
  position:relative;
}
/* Atmospheric multi-plane background */
.atmosphere{position:fixed;inset:0;z-index:-2;overflow:hidden}
.atmosphere::before,.atmosphere::after{
  content:"";position:absolute;border-radius:50%;
  filter:blur(120px);opacity:.5;
}
.atmosphere::before{
  width:60vw;height:60vw;left:-15vw;top:-10vw;
  background:radial-gradient(circle,var(--fog-1),transparent 70%);
  animation:drift1 28s var(--ease) infinite alternate;
}
.atmosphere::after{
  width:55vw;height:55vw;right:-12vw;bottom:-15vw;
  background:radial-gradient(circle,#1d2c4e,transparent 70%);
  animation:drift2 34s var(--ease) infinite alternate;
}
.fog-plane{
  position:fixed;inset:0;z-index:-1;pointer-events:none;
  background:
    radial-gradient(ellipse 80% 50% at 50% -10%,#15203a40,transparent),
    radial-gradient(ellipse 60% 40% at 80% 100%,#10182c60,transparent);
}
@keyframes drift1{to{transform:translate(8vw,6vh) scale(1.15)}}
@keyframes drift2{to{transform:translate(-6vw,-5vh) scale(1.1)}}

h1,h2,h3,h4{font-weight:600;letter-spacing:-.02em;line-height:1.2}
h1{font-size:clamp(2.2rem,5vw,3.8rem);font-weight:700}
h2{font-size:clamp(1.7rem,3.5vw,2.6rem)}
h3{font-size:1.3rem}
p{color:var(--text-soft)}
a{color:inherit;text-decoration:none;transition:color .3s var(--ease)}
img{max-width:100%;display:block}
.container{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.accent-text{color:var(--accent-glow)}
.eyebrow{
  display:inline-block;font-size:.78rem;letter-spacing:.22em;text-transform:uppercase;
  color:var(--accent);margin-bottom:18px;font-weight:500;
  padding:6px 16px;border:1px solid var(--line);border-radius:40px;
  background:var(--bg-island-soft);backdrop-filter:blur(8px);
}

/* Header / Nav */
header{
  position:sticky;top:0;z-index:100;
  backdrop-filter:blur(16px);
  background:linear-gradient(to bottom,#0a0e16dd,#0a0e1699);
  border-bottom:1px solid var(--line);
}
.nav{display:flex;align-items:center;justify-content:space-between;height:74px}
.logo{display:flex;align-items:center;gap:11px;font-weight:700;font-size:1.18rem;letter-spacing:-.02em}
.logo img{width:34px;height:34px}
.logo span b{color:var(--accent-glow)}
.nav-links{display:flex;gap:6px;align-items:center}
.nav-links a{
  color:var(--text-soft);font-size:.93rem;padding:9px 15px;border-radius:10px;
  transition:all .3s var(--ease);
}
.nav-links a:hover,.nav-links a.active{color:var(--text);background:var(--bg-island)}
.nav-cta{
  background:linear-gradient(135deg,var(--accent-deep),var(--accent));
  color:#0a0e16 !important;font-weight:600;padding:10px 20px !important;
  border-radius:10px;margin-left:8px;
}
.nav-cta:hover{background:var(--accent-glow);transform:translateY(-1px)}
.burger{display:none;background:none;border:none;cursor:pointer;flex-direction:column;gap:5px;padding:8px}
.burger span{width:24px;height:2px;background:var(--text);border-radius:2px;transition:.3s}

/* Buttons */
.btn{
  display:inline-flex;align-items:center;gap:9px;cursor:pointer;border:none;
  font-family:inherit;font-size:.96rem;font-weight:600;padding:14px 28px;border-radius:12px;
  transition:all .3s var(--ease);
}
.btn-primary{background:linear-gradient(135deg,var(--accent-deep),var(--accent));color:#0a0e16}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 30px -10px var(--accent-deep)}
.btn-ghost{background:var(--bg-island);color:var(--text);border:1px solid var(--line)}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent-glow)}

/* Hero */
.hero{padding:90px 0 80px;position:relative}
.hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:60px;align-items:center}
.hero p.lead{font-size:1.18rem;margin:22px 0 34px;max-width:540px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}
.hero-visual{position:relative}
.hero-visual img{
  border-radius:var(--radius);border:1px solid var(--line);
  box-shadow:0 40px 80px -30px #000a;
}
.float-island{
  position:absolute;background:var(--bg-island);border:1px solid var(--line);
  border-radius:var(--radius-sm);padding:16px 20px;backdrop-filter:blur(12px);
  box-shadow:0 20px 50px -20px #000c;
}
.float-island.fi-1{top:-22px;left:-26px;animation:floaty 6s ease-in-out infinite}
.float-island.fi-2{bottom:-22px;right:-20px;animation:floaty 7s ease-in-out infinite .8s}
.float-island .num{font-size:1.5rem;font-weight:700;color:var(--accent-glow)}
.float-island .lbl{font-size:.78rem;color:var(--text-mute)}
@keyframes floaty{50%{transform:translateY(-12px)}}

/* Sections */
section{padding:80px 0;position:relative}
.section-head{text-align:center;max-width:680px;margin:0 auto 56px}
.section-head p{margin-top:14px;font-size:1.05rem}

/* Cards / Islands grid */
.islands{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.island{
  background:var(--bg-island);border:1px solid var(--line);border-radius:var(--radius);
  padding:32px;transition:all .4s var(--ease);position:relative;overflow:hidden;
}
.island::after{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,var(--accent),transparent);
  opacity:0;transition:opacity .4s;
}
.island:hover{transform:translateY(-6px);border-color:var(--accent-deep);background:#16213a}
.island:hover::after{opacity:.7}
.island .ic{
  width:50px;height:50px;border-radius:13px;display:grid;place-items:center;margin-bottom:18px;
  background:linear-gradient(135deg,var(--fog-1),var(--bg-island));border:1px solid var(--line);
  font-size:1.5rem;
}
.island h3{margin-bottom:10px}
.island p{font-size:.95rem}

/* Feature split */
.split{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.split.reverse .split-text{order:2}
.split img{border-radius:var(--radius);border:1px solid var(--line);box-shadow:0 30px 60px -25px #000a}
.split-text h2{margin-bottom:18px}
.check-list{list-style:none;margin-top:24px;display:flex;flex-direction:column;gap:14px}
.check-list li{display:flex;gap:13px;align-items:flex-start;color:var(--text-soft)}
.check-list li::before{
  content:"";flex:none;width:22px;height:22px;border-radius:7px;margin-top:2px;
  background:linear-gradient(135deg,var(--accent-deep),var(--accent));
  -webkit-mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath fill='black' d='M9 16.2 4.8 12l-1.4 1.4L9 19 21 7l-1.4-1.4z'/%3E%3C/svg%3E") center/15px no-repeat;
  mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath fill='black' d='M9 16.2 4.8 12l-1.4 1.4L9 19 21 7l-1.4-1.4z'/%3E%3C/svg%3E") center/15px no-repeat;
}

/* Stats band */
.stats-band{
  display:grid;grid-template-columns:repeat(4,1fr);gap:24px;
  background:var(--bg-island);border:1px solid var(--line);border-radius:var(--radius);
  padding:46px 36px;
}
.stat{text-align:center}
.stat .n{font-size:2.4rem;font-weight:700;color:var(--accent-glow)}
.stat .l{font-size:.9rem;color:var(--text-mute);margin-top:4px}

/* Pricing */
.pricing{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;align-items:stretch}
.price-card{
  background:var(--bg-island);border:1px solid var(--line);border-radius:var(--radius);
  padding:36px 30px;display:flex;flex-direction:column;transition:all .4s var(--ease);position:relative;
}
.price-card:hover{transform:translateY(-6px);border-color:var(--accent-deep)}
.price-card.featured{
  border-color:var(--accent);background:linear-gradient(180deg,#16213ad0,var(--bg-island));
  box-shadow:0 30px 70px -30px var(--accent-deep);
}
.price-badge{
  position:absolute;top:-13px;left:50%;transform:translateX(-50%);
  background:linear-gradient(135deg,var(--accent-deep),var(--accent));color:#0a0e16;
  font-size:.75rem;font-weight:700;padding:6px 16px;border-radius:30px;letter-spacing:.05em;
}
.price-card h3{margin-bottom:6px}
.price-card .desc{font-size:.88rem;color:var(--text-mute);min-height:42px}
.price-card .amount{font-size:2.8rem;font-weight:700;margin:18px 0 4px;color:var(--text)}
.price-card .amount small{font-size:1rem;color:var(--text-mute);font-weight:400}
.price-card ul{list-style:none;margin:24px 0 28px;display:flex;flex-direction:column;gap:12px;flex:1}
.price-card ul li{font-size:.92rem;color:var(--text-soft);display:flex;gap:10px;align-items:flex-start}
.price-card ul li::before{content:"›";color:var(--accent);font-weight:700;flex:none}
.price-card .btn{width:100%;justify-content:center}
.price-note{text-align:center;margin-top:34px;color:var(--text-mute);font-size:.9rem}

/* Steps */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;counter-reset:s}
.step{background:var(--bg-island-soft);border:1px solid var(--line);border-radius:var(--radius);padding:30px 26px;position:relative;backdrop-filter:blur(8px)}
.step .step-n{
  counter-increment:s;font-size:.85rem;font-weight:700;color:var(--accent);
  width:38px;height:38px;border-radius:11px;display:grid;place-items:center;
  border:1px solid var(--line);background:var(--bg-mid);margin-bottom:16px;
}
.step .step-n::before{content:"0" counter(s)}
.step h3{font-size:1.1rem;margin-bottom:8px}
.step p{font-size:.9rem}

/* Testimonials */
.quotes{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.quote{background:var(--bg-island);border:1px solid var(--line);border-radius:var(--radius);padding:30px}
.quote p{font-size:.97rem;color:var(--text-soft);font-style:italic}
.quote .who{display:flex;align-items:center;gap:13px;margin-top:22px}
.quote .who .av{width:44px;height:44px;border-radius:50%;object-fit:cover;border:1px solid var(--line)}
.quote .who b{display:block;font-size:.92rem;font-style:normal}
.quote .who span{font-size:.8rem;color:var(--text-mute)}

/* CTA band */
.cta-band{
  background:linear-gradient(135deg,var(--bg-island),#16213a);
  border:1px solid var(--line);border-radius:var(--radius);
  padding:64px 48px;text-align:center;position:relative;overflow:hidden;
}
.cta-band::before{
  content:"";position:absolute;width:400px;height:400px;border-radius:50%;
  background:radial-gradient(circle,var(--accent-deep)40,transparent 70%);
  filter:blur(60px);top:-150px;left:50%;transform:translateX(-50%);opacity:.4;
}
.cta-band h2{margin-bottom:14px;position:relative}
.cta-band p{max-width:520px;margin:0 auto 28px;position:relative}
.cta-band .hero-actions{justify-content:center;position:relative}

/* Forms */
.form-wrap{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:start}
.contact-card{background:var(--bg-island);border:1px solid var(--line);border-radius:var(--radius);padding:38px}
.field{margin-bottom:20px}
.field label{display:block;font-size:.85rem;color:var(--text-soft);margin-bottom:8px;font-weight:500}
.field input,.field select,.field textarea{
  width:100%;padding:13px 16px;background:var(--bg-mid);border:1px solid var(--line);
  border-radius:11px;color:var(--text);font-family:inherit;font-size:.95rem;transition:.3s;
}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-deep)30;
}
.field textarea{resize:vertical;min-height:120px}
.field .err{color:#e08a8a;font-size:.8rem;margin-top:6px;display:none}
.field.invalid .err{display:block}
.field.invalid input,.field.invalid textarea{border-color:#a35a5a}
.form-msg{padding:14px 18px;border-radius:11px;background:#1a3a2a;border:1px solid #2e5e44;color:#a8e0c0;font-size:.9rem;margin-top:6px;display:none}
.form-msg.show{display:block}
.checkbox-row{display:flex;gap:10px;align-items:flex-start;font-size:.85rem;color:var(--text-mute)}
.checkbox-row input{width:auto;margin-top:3px}
.checkbox-row a{color:var(--accent);text-decoration:underline}

.info-block{display:flex;flex-direction:column;gap:24px}
.info-item{display:flex;gap:16px;align-items:flex-start}
.info-item .ic{width:46px;height:46px;border-radius:12px;flex:none;display:grid;place-items:center;background:var(--bg-island);border:1px solid var(--line);font-size:1.25rem}
.info-item h4{font-size:1rem;margin-bottom:3px}
.info-item p,.info-item a{font-size:.92rem;color:var(--text-soft)}
.info-item a:hover{color:var(--accent-glow)}
.map-embed{margin-top:8px;border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);background:var(--bg-island);padding:24px;text-align:center}

/* FAQ */
.faq{max-width:820px;margin:0 auto;display:flex;flex-direction:column;gap:14px}
.faq-item{background:var(--bg-island);border:1px solid var(--line);border-radius:var(--radius-sm);overflow:hidden}
.faq-q{padding:20px 24px;cursor:pointer;display:flex;justify-content:space-between;align-items:center;font-weight:600;font-size:1rem;list-style:none}
.faq-q::-webkit-details-marker{display:none}
.faq-q .pl{color:var(--accent);font-size:1.4rem;transition:.3s;flex:none;margin-left:16px}
.faq-item[open] .faq-q .pl{transform:rotate(45deg)}
.faq-a{padding:0 24px 22px;color:var(--text-soft);font-size:.94rem}

/* Legal / article pages */
.page-hero{padding:70px 0 40px;text-align:center}
.page-hero .eyebrow{margin-bottom:16px}
.legal{max-width:860px;margin:0 auto;padding:20px 0 60px}
.legal .updated{color:var(--text-mute);font-size:.88rem;margin-bottom:36px}
.legal h2{font-size:1.5rem;margin:38px 0 14px}
.legal h3{font-size:1.15rem;margin:26px 0 10px}
.legal p,.legal li{color:var(--text-soft);font-size:.96rem;margin-bottom:12px}
.legal ul,.legal ol{margin:0 0 16px 22px}
.legal li{margin-bottom:8px}
.legal a{color:var(--accent);text-decoration:underline}
.legal .box{background:var(--bg-island);border:1px solid var(--line);border-radius:var(--radius-sm);padding:24px;margin:20px 0}

/* Footer */
footer{border-top:1px solid var(--line);background:var(--bg-mid);margin-top:40px}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;padding:60px 0 40px}
.foot-brand .logo{margin-bottom:16px}
.foot-brand p{font-size:.9rem;max-width:300px}
.foot-col h4{font-size:.85rem;text-transform:uppercase;letter-spacing:.1em;color:var(--text-mute);margin-bottom:18px}
.foot-col a{display:block;color:var(--text-soft);font-size:.92rem;margin-bottom:11px}
.foot-col a:hover{color:var(--accent-glow)}
.foot-bottom{border-top:1px solid var(--line);padding:24px 0;display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap}
.foot-bottom p{font-size:.85rem;color:var(--text-mute)}
.foot-bottom .fb-links{display:flex;gap:20px;flex-wrap:wrap}
.foot-bottom .fb-links a{font-size:.85rem;color:var(--text-mute)}
.foot-bottom .fb-links a:hover{color:var(--accent)}

/* Cookie banner */
.cookie{
  position:fixed;bottom:20px;left:20px;right:20px;max-width:560px;margin:0 auto;z-index:200;
  background:var(--bg-island);border:1px solid var(--line);border-radius:var(--radius);
  padding:24px 26px;box-shadow:0 30px 70px -20px #000d;backdrop-filter:blur(16px);
  transform:translateY(140%);transition:transform .5s var(--ease);
}
.cookie.show{transform:translateY(0)}
.cookie h4{font-size:1.05rem;margin-bottom:8px}
.cookie p{font-size:.88rem;margin-bottom:18px}
.cookie p a{color:var(--accent);text-decoration:underline}
.cookie-actions{display:flex;gap:12px;flex-wrap:wrap}
.cookie-actions .btn{padding:11px 22px;font-size:.9rem}

/* reveal */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.reveal.in{opacity:1;transform:none}

/* Responsive */
@media(max-width:980px){
  .hero-grid,.split,.form-wrap{grid-template-columns:1fr;gap:40px}
  .split.reverse .split-text{order:0}
  .islands,.pricing,.quotes{grid-template-columns:1fr 1fr}
  .steps,.stats-band{grid-template-columns:1fr 1fr}
  .foot-grid{grid-template-columns:1fr 1fr}
  .hero-visual{max-width:480px;margin:0 auto}
}
@media(max-width:680px){
  .nav-links{
    position:fixed;top:74px;left:0;right:0;flex-direction:column;align-items:stretch;
    background:var(--bg-mid);border-bottom:1px solid var(--line);padding:16px;gap:4px;
    transform:translateY(-130%);transition:transform .4s var(--ease);z-index:99;
  }
  .nav-links.open{transform:translateY(0)}
  .nav-links a{padding:13px 16px}
  .nav-cta{margin-left:0;text-align:center}
  .burger{display:flex}
  .islands,.pricing,.quotes,.steps,.stats-band,.foot-grid{grid-template-columns:1fr}
  .float-island{display:none}
  section{padding:56px 0}
  .cta-band{padding:44px 24px}
  .foot-bottom{flex-direction:column;text-align:center}
}