/* ColdByte - core stylesheet */

:root{
  --bg:#070B14;
  --bg-2:#0B1120;
  --surface:#0E1524;
  --surface-2:#131C2E;
  --border:#1E2A42;
  --border-soft:#172238;
  --text:#E8EFFA;
  --muted:#93A4BF;
  --muted-2:#6B7C99;
  --accent:#4CC3FF;
  --accent-2:#7C5CFF;
  --accent-soft:rgba(76,195,255,.12);
  --ok:#3DDC97;
  --warn:#FFC14D;
  --danger:#FF6B6B;
  --radius:14px;
  --radius-sm:9px;
  --maxw:1140px;
  --shadow:0 18px 40px -18px rgba(0,0,0,.8);
  --font:'Inter',system-ui,-apple-system,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;
  --mono:'JetBrains Mono',ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--font);
  font-size:16px;
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3,h4{line-height:1.2;margin:0 0 .5em;letter-spacing:-.02em;font-weight:700}
h1{font-size:clamp(2rem,5vw,3.4rem)}
h2{font-size:clamp(1.5rem,3.2vw,2.2rem)}
h3{font-size:1.15rem}
p{margin:0 0 1rem}
ul{padding-left:1.15rem}
code,kbd{font-family:var(--mono);font-size:.9em}
hr{border:0;border-top:1px solid var(--border-soft);margin:40px 0}

.wrap{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 20px}
.section{padding:72px 0}
.section--tight{padding:48px 0}
.center{text-align:center}
.muted{color:var(--muted)}
.small{font-size:.9rem}
.mono{font-family:var(--mono)}

/* ---------- Skip link ---------- */
.skip{position:absolute;left:-9999px;top:0;background:var(--accent);color:#04121c;padding:10px 16px;z-index:200;border-radius:0 0 8px 0}
.skip:focus{left:0}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(7,11,20,.82);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--border-soft);
}
.nav{display:flex;align-items:center;gap:20px;height:66px;position:relative}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:1.05rem;color:var(--text);letter-spacing:-.02em}
.brand:hover{text-decoration:none;color:var(--text)}
.brand svg{width:28px;height:28px;flex:0 0 auto}
.brand b{color:var(--accent);font-weight:700}
.nav-links{display:flex;gap:4px;margin-left:auto;align-items:center}
.nav-links a{
  color:var(--muted);padding:8px 13px;border-radius:8px;font-size:.94rem;font-weight:500;
  transition:color .15s,background .15s;
}
.nav-links a:hover{color:var(--text);background:var(--surface-2);text-decoration:none}
.nav-links a.active{color:var(--text);background:var(--surface-2)}
.nav-links a.btn{color:#04121C}
.nav-toggle{
  display:none;margin-left:auto;background:var(--surface-2);border:1px solid var(--border);
  color:var(--text);width:42px;height:38px;border-radius:9px;cursor:pointer;
  align-items:center;justify-content:center;
}
.nav-toggle svg{width:20px;height:20px}

@media (max-width:880px){
  .nav-toggle{display:flex}
  .nav-links{
    position:absolute;top:66px;left:-20px;right:-20px;
    flex-direction:column;align-items:stretch;gap:2px;
    background:var(--bg-2);border-bottom:1px solid var(--border);
    padding:12px 20px 18px;margin:0;display:none;
  }
  .nav-links.open{display:flex}
  .nav-links a{padding:11px 12px}
  .nav-links a.btn{margin-top:8px}
}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 20px;border-radius:10px;font-weight:600;font-size:.95rem;
  border:1px solid transparent;cursor:pointer;
  transition:transform .12s,box-shadow .18s,background .18s,border-color .18s;
  font-family:inherit;white-space:nowrap;
}
.btn:hover{text-decoration:none;transform:translateY(-1px)}
.btn:active{transform:translateY(0)}
.btn--primary{background:linear-gradient(135deg,var(--accent),#37A9E8);color:#04121C;box-shadow:0 8px 22px -10px rgba(76,195,255,.8)}
.btn--primary:hover{box-shadow:0 12px 28px -10px rgba(76,195,255,.9);color:#04121C}
.btn--ghost{background:transparent;border-color:var(--border);color:var(--text)}
.btn--ghost:hover{border-color:var(--accent);background:var(--accent-soft)}
.btn--block{width:100%}
.btn[disabled]{opacity:.55;cursor:not-allowed;transform:none}
.btn svg{width:17px;height:17px;flex:0 0 auto}

/* ---------- Hero ---------- */
.hero{position:relative;padding:92px 0 78px;overflow:hidden}
.hero::before{
  content:"";position:absolute;inset:-40% 0 auto;height:720px;
  background:radial-gradient(60% 55% at 50% 40%,rgba(76,195,255,.16),transparent 70%),
             radial-gradient(40% 40% at 78% 15%,rgba(124,92,255,.14),transparent 70%);
  pointer-events:none;
}
.hero .wrap{position:relative}
.hero h1{max-width:17ch;margin-bottom:20px}
.hero .lede{font-size:clamp(1.02rem,2vw,1.2rem);color:var(--muted);max-width:58ch;margin-bottom:28px}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap}
.hero-meta{display:flex;gap:34px;flex-wrap:wrap;margin-top:40px;padding-top:26px;border-top:1px solid var(--border-soft)}
.hero-meta div{font-size:.86rem;color:var(--muted-2)}
.hero-meta b{display:block;color:var(--text);font-size:1.4rem;font-weight:700;letter-spacing:-.02em}

.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:.78rem;font-weight:600;letter-spacing:.08em;text-transform:uppercase;
  color:var(--accent);background:var(--accent-soft);border:1px solid rgba(76,195,255,.25);
  padding:6px 13px;border-radius:99px;margin-bottom:22px;
}
.eyebrow .dot{width:6px;height:6px;border-radius:50%;background:var(--ok);box-shadow:0 0 0 3px rgba(61,220,151,.18)}

/* ---------- Cards / grid ---------- */
.grid{display:grid;gap:20px}
.grid--3{grid-template-columns:repeat(auto-fit,minmax(288px,1fr))}
.grid--2{grid-template-columns:repeat(auto-fit,minmax(320px,1fr))}

.card{
  background:linear-gradient(180deg,var(--surface),var(--bg-2));
  border:1px solid var(--border);border-radius:var(--radius);
  padding:24px;display:flex;flex-direction:column;
  transition:border-color .2s,transform .2s,box-shadow .2s;
}
.card--link:hover{border-color:rgba(76,195,255,.45);transform:translateY(-3px);box-shadow:var(--shadow)}
.card h3{margin-bottom:8px}
.card h3 a{color:var(--text)}
.card h3 a:hover{color:var(--accent);text-decoration:none}
.card p{color:var(--muted);font-size:.94rem;margin-bottom:16px}
.card .card-foot{margin-top:auto;display:flex;align-items:center;gap:10px;flex-wrap:wrap;padding-top:6px}
.card.is-hidden{display:none}

.app-icon{
  width:48px;height:48px;border-radius:12px;display:grid;place-items:center;margin-bottom:16px;
  background:var(--accent-soft);border:1px solid rgba(76,195,255,.22);
}
.app-icon svg{width:24px;height:24px;stroke:var(--accent);fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}

.tag{
  display:inline-flex;align-items:center;gap:6px;
  font-size:.75rem;font-weight:600;letter-spacing:.03em;
  padding:4px 10px;border-radius:99px;border:1px solid var(--border);
  color:var(--muted);background:var(--surface-2);
}
.tag--free{color:var(--ok);border-color:rgba(61,220,151,.3);background:rgba(61,220,151,.1)}
.tag--paid{color:var(--accent-2);border-color:rgba(124,92,255,.35);background:rgba(124,92,255,.12)}
.tag--soon{color:var(--warn);border-color:rgba(255,193,77,.3);background:rgba(255,193,77,.1)}
.tag-row{display:flex;gap:7px;flex-wrap:wrap;margin-bottom:14px}

/* ---------- Section heads ---------- */
.sec-head{margin-bottom:34px;max-width:62ch}
.sec-head p{color:var(--muted);margin:0}
.sec-head--row{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;max-width:none}
.sec-head--row > div{max-width:62ch}
@media (max-width:640px){.sec-head--row{flex-direction:column;align-items:flex-start}}

/* ---------- Trust strip ---------- */
.trust{background:var(--bg-2);border-top:1px solid var(--border-soft);border-bottom:1px solid var(--border-soft)}
.trust-grid{display:grid;gap:26px;grid-template-columns:repeat(auto-fit,minmax(230px,1fr))}
.trust-item{display:flex;gap:14px;align-items:flex-start}
.trust-item svg{width:22px;height:22px;stroke:var(--accent);fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;flex:0 0 auto;margin-top:3px}
.trust-item h3{font-size:1rem;margin-bottom:4px}
.trust-item p{color:var(--muted);font-size:.9rem;margin:0}

/* ---------- Filters ---------- */
.filters{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:26px}
.filter{
  background:var(--surface);border:1px solid var(--border);color:var(--muted);
  padding:8px 16px;border-radius:99px;font-size:.88rem;font-weight:600;cursor:pointer;
  font-family:inherit;transition:.15s;
}
.filter:hover{color:var(--text);border-color:var(--muted-2)}
.filter.active{background:var(--accent-soft);border-color:rgba(76,195,255,.45);color:var(--accent)}

/* ---------- Forms ---------- */
.form-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:32px}
@media (max-width:560px){.form-card{padding:22px}}
.field{margin-bottom:18px}
.field label{display:block;font-size:.88rem;font-weight:600;margin-bottom:7px;color:var(--text)}
.field .hint{font-size:.82rem;color:var(--muted-2);margin:6px 0 0}
.req{color:var(--accent)}
input[type=text],input[type=email],input[type=url],select,textarea{
  width:100%;padding:12px 14px;background:var(--bg-2);color:var(--text);
  border:1px solid var(--border);border-radius:var(--radius-sm);
  font-family:inherit;font-size:.95rem;transition:border-color .15s,box-shadow .15s;
}
input::placeholder,textarea::placeholder{color:var(--muted-2)}
input:focus,select:focus,textarea:focus{
  outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgba(76,195,255,.15);
}
textarea{min-height:150px;resize:vertical}
select{
  appearance:none;
  background-image:url("data:image/svg+xml;charset=utf8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='none' stroke='%2393A4BF' stroke-width='2'%3E%3Cpath d='M4 6l4 4 4-4'/%3E%3C/svg%3E");
  background-repeat:no-repeat;background-position:right 14px center;padding-right:40px;
}
.check{display:flex;gap:11px;align-items:flex-start;font-size:.9rem;color:var(--muted);cursor:pointer;margin-bottom:14px}
.check input{margin-top:3px;accent-color:var(--accent);width:17px;height:17px;flex:0 0 auto}
.hp{position:absolute;left:-9999px;opacity:0;height:0;width:0;pointer-events:none}

.form-msg{padding:13px 16px;border-radius:var(--radius-sm);font-size:.92rem;margin-top:16px;display:none}
.form-msg.show{display:block}
.form-msg.ok{background:rgba(61,220,151,.1);border:1px solid rgba(61,220,151,.35);color:var(--ok)}
.form-msg.err{background:rgba(255,107,107,.1);border:1px solid rgba(255,107,107,.35);color:#FF8B8B}

/* ---------- Newsletter ---------- */
.subscribe{
  background:linear-gradient(135deg,rgba(76,195,255,.09),rgba(124,92,255,.09));
  border:1px solid var(--border);border-radius:var(--radius);padding:38px;
}
@media (max-width:560px){.subscribe{padding:24px}}
.subscribe-form{display:flex;gap:10px;flex-wrap:wrap;max-width:480px}
.subscribe-form input{flex:1 1 220px}
@media (max-width:520px){.subscribe-form .btn{width:100%}}

/* ---------- App detail ---------- */
.app-head{display:grid;grid-template-columns:auto 1fr;gap:22px;align-items:start}
@media (max-width:560px){.app-head{grid-template-columns:1fr}}
.app-head .app-icon{width:68px;height:68px;margin:0;border-radius:16px}
.app-head .app-icon svg{width:34px;height:34px}
.app-layout{display:grid;grid-template-columns:1fr 330px;gap:38px;align-items:start}
@media (max-width:900px){.app-layout{grid-template-columns:1fr}}
.aside-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:24px;position:sticky;top:90px}
@media (max-width:900px){.aside-card{position:static}}
.spec{display:flex;justify-content:space-between;gap:14px;padding:10px 0;border-bottom:1px solid var(--border-soft);font-size:.9rem}
.spec:last-of-type{border-bottom:0}
.spec dt{color:var(--muted)}
.spec dd{margin:0;color:var(--text);font-weight:600;text-align:right}
.feature-list{list-style:none;padding:0;margin:0}
.feature-list li{position:relative;padding-left:28px;margin-bottom:12px;color:var(--muted)}
.feature-list li::before{
  content:"";position:absolute;left:0;top:6px;width:17px;height:17px;border-radius:50%;
  background:var(--accent-soft);border:1px solid rgba(76,195,255,.4);
}
.feature-list li::after{
  content:"";position:absolute;left:5px;top:10.5px;width:6px;height:3px;
  border-left:2px solid var(--accent);border-bottom:2px solid var(--accent);transform:rotate(-45deg);
}
.price{font-size:2rem;font-weight:800;letter-spacing:-.03em;margin:0 0 4px}
.price small{font-size:.85rem;font-weight:500;color:var(--muted);letter-spacing:0}

.notice{
  background:var(--surface);border:1px solid var(--border);border-left:3px solid var(--accent);
  border-radius:var(--radius-sm);padding:16px 18px;font-size:.92rem;color:var(--muted);
}
.notice strong{color:var(--text)}
.notice p:last-child{margin-bottom:0}

/* ---------- Steps ---------- */
.steps{counter-reset:s;list-style:none;padding:0;margin:0;display:grid;gap:22px}
.steps li{counter-increment:s;position:relative;padding-left:52px}
.steps li::before{
  content:counter(s);position:absolute;left:0;top:-2px;width:34px;height:34px;border-radius:10px;
  display:grid;place-items:center;font-weight:700;font-size:.95rem;
  background:var(--accent-soft);border:1px solid rgba(76,195,255,.3);color:var(--accent);
}
.steps h3{margin-bottom:4px;font-size:1rem}
.steps p{color:var(--muted);font-size:.92rem;margin:0}

/* ---------- FAQ ---------- */
details.faq{border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--surface);margin-bottom:10px;overflow:hidden}
details.faq summary{padding:16px 20px;cursor:pointer;font-weight:600;list-style:none;display:flex;justify-content:space-between;gap:16px;align-items:center}
details.faq summary::-webkit-details-marker{display:none}
details.faq summary::after{content:"+";color:var(--accent);font-size:1.35rem;line-height:1;font-weight:400}
details.faq[open] summary::after{content:"\2013"}
details.faq .faq-body{padding:0 20px 18px;color:var(--muted);font-size:.93rem}
details.faq .faq-body p:last-child{margin-bottom:0}

/* ---------- Footer ---------- */
.site-footer{border-top:1px solid var(--border-soft);background:var(--bg-2);padding:54px 0 30px;margin-top:20px}
.foot-grid{display:grid;gap:34px;grid-template-columns:1.6fr 1fr 1fr 1fr}
@media (max-width:820px){.foot-grid{grid-template-columns:1fr 1fr}}
@media (max-width:480px){.foot-grid{grid-template-columns:1fr}}
.foot-about p{color:var(--muted);font-size:.92rem;max-width:34ch;margin-top:14px}
.foot-grid h4{font-size:.8rem;text-transform:uppercase;letter-spacing:.09em;color:var(--muted-2);margin-bottom:14px}
.foot-grid ul{list-style:none;padding:0;margin:0}
.foot-grid li{margin-bottom:9px}
.foot-grid a{color:var(--muted);font-size:.92rem}
.foot-grid a:hover{color:var(--accent);text-decoration:none}
.foot-bottom{
  margin-top:38px;padding-top:22px;border-top:1px solid var(--border-soft);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:.86rem;color:var(--muted-2);
}

/* ---------- Page header ---------- */
.page-head{padding:56px 0 40px;border-bottom:1px solid var(--border-soft)}
.page-head .lede{color:var(--muted);max-width:62ch;font-size:1.02rem;margin-bottom:0}
.crumb{font-size:.85rem;color:var(--muted-2);margin-bottom:12px}
.crumb a{color:var(--muted)}

/* ---------- Prose (legal pages) ---------- */
.prose{max-width:74ch}
.prose h2{margin-top:2.2em;font-size:1.3rem}
.prose h3{margin-top:1.6em;font-size:1.05rem}
.prose li{color:var(--muted);margin-bottom:.5em}
.prose p{color:var(--muted)}

@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;scroll-behavior:auto !important}
}