/* ============================================
   CATA — Design System
   Disciplined. Transparent. No bullshit.
   ============================================ */

:root {
    --bg-0: #08080d;
    --bg-1: #0c0c14;
    --bg-2: #12121c;
    --bg-card: #151520;
    --bg-card-h: #1a1a28;
    --bg-input: #0e0e18;

    --text-0: #f2f2f7;
    --text-1: #b0b0c0;
    --text-2: #6e6e84;
    --text-3: #44445a;

    --accent: #6366f1;
    --accent-h: #818cf8;
    --accent-glow: rgba(99,102,241,.12);
    --green: #22c55e;
    --green-glow: rgba(34,197,94,.1);
    --red: #ef4444;
    --amber: #f59e0b;
    --cyan: #06b6d4;

    --border: rgba(255,255,255,.06);
    --border-h: rgba(255,255,255,.12);
    --border-accent: rgba(99,102,241,.25);

    --nav-h: 64px;
    --section-py: 100px;
    --max-w: 1120px;
    --font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --mono: 'JetBrains Mono', monospace;
    --ease: cubic-bezier(.4,0,.2,1);
    --radius: 12px;
    --radius-lg: 18px;
}

/* --- Reset --- */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-font-smoothing:antialiased}
body{font-family:var(--font);background:var(--bg-0);color:var(--text-0);line-height:1.65;overflow-x:hidden}
a{color:inherit;text-decoration:none}
ul{list-style:none}
img{max-width:100%;display:block}
button{font-family:inherit;cursor:pointer}

/* --- Layout --- */
.container{max-width:var(--max-w);margin:0 auto;padding:0 24px}
.section{padding:var(--section-py) 0;position:relative}
.section-alt{background:var(--bg-1)}

/* --- Typography --- */
.section-tag{
    display:inline-block;font-family:var(--mono);font-size:11px;font-weight:600;
    text-transform:uppercase;letter-spacing:2.5px;color:var(--accent-h);margin-bottom:14px;
}
.section-header{text-align:center;margin-bottom:56px;max-width:680px;margin-left:auto;margin-right:auto}
.section-title{font-size:clamp(26px,3.6vw,42px);font-weight:800;letter-spacing:-.5px;line-height:1.2;margin-bottom:14px}
.section-desc{font-size:15px;color:var(--text-1);line-height:1.7}
.section-header-left{text-align:left;max-width:none}

h1,h2,h3,h4{letter-spacing:-.3px}

/* --- Buttons --- */
.btn{
    display:inline-flex;align-items:center;gap:8px;font-weight:600;
    border:none;border-radius:10px;transition:all .25s var(--ease);white-space:nowrap;font-family:var(--font);
}
.btn-sm{padding:8px 18px;font-size:13px}
.btn-md{padding:11px 22px;font-size:14px}
.btn-lg{padding:14px 28px;font-size:15px}
.btn-primary{background:var(--accent);color:#fff;box-shadow:0 0 20px rgba(99,102,241,.25)}
.btn-primary:hover{background:var(--accent-h);box-shadow:0 0 32px rgba(99,102,241,.4);transform:translateY(-1px)}
.btn-ghost{background:transparent;color:var(--text-1);border:1px solid var(--border)}
.btn-ghost:hover{color:var(--text-0);border-color:var(--border-h);background:rgba(255,255,255,.02)}
.btn-outline{background:transparent;color:var(--text-0);border:1px solid var(--border);padding:12px 24px;font-size:14px}
.btn-outline:hover{border-color:var(--accent);color:var(--accent-h)}
.btn-block{display:flex;justify-content:center;width:100%}
.btn svg{flex-shrink:0}

/* --- Nav --- */
.nav{
    position:fixed;top:0;left:0;right:0;height:var(--nav-h);z-index:1000;
    background:rgba(8,8,13,.75);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);
    border-bottom:1px solid var(--border);transition:background .3s var(--ease);
}
.nav.scrolled{background:rgba(8,8,13,.95)}
.nav-inner{max-width:var(--max-w);margin:0 auto;padding:0 24px;height:100%;display:flex;align-items:center;justify-content:space-between}
.nav-logo{display:flex;align-items:center;gap:8px;font-weight:700;font-size:17px}
.logo-icon{color:var(--accent);font-size:20px}
.logo-badge{font-size:10px;font-weight:500;color:var(--text-3);letter-spacing:1px;text-transform:uppercase;margin-left:4px}
.nav-links{display:flex;gap:28px}
.nav-links a{font-size:13px;font-weight:500;color:var(--text-2);transition:color .2s var(--ease)}
.nav-links a:hover,.nav-links a.active{color:var(--text-0)}
.nav-actions{display:flex;align-items:center;gap:12px}
.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:none;padding:4px}
.nav-toggle span{display:block;width:20px;height:1.5px;background:var(--text-0);border-radius:1px;transition:all .3s var(--ease)}

/* --- Hero --- */
.hero{position:relative;min-height:100vh;display:flex;align-items:center;padding-top:var(--nav-h);overflow:hidden}
.hero-bg{position:absolute;inset:0;pointer-events:none}
.grid-overlay{
    position:absolute;inset:0;
    background-image:linear-gradient(rgba(255,255,255,.015) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.015) 1px,transparent 1px);
    background-size:64px 64px;mask-image:radial-gradient(ellipse 70% 50% at 50% 40%,black,transparent);
}
.glow{position:absolute;border-radius:50%;filter:blur(120px)}
.glow-1{width:500px;height:500px;background:var(--accent);top:-180px;left:50%;transform:translateX(-50%);opacity:.1}
.glow-2{width:300px;height:300px;background:var(--cyan);bottom:15%;left:-80px;opacity:.06}
.hero-content{text-align:center;position:relative;z-index:1;padding:60px 0}

.hero-badge{
    display:inline-flex;align-items:center;gap:8px;padding:5px 14px;border-radius:100px;
    border:1px solid var(--border);background:rgba(255,255,255,.02);
    font-size:12px;font-weight:500;color:var(--text-2);margin-bottom:28px;
}
.pulse-dot{width:7px;height:7px;border-radius:50%;background:var(--green);animation:pulse 2s infinite}
@keyframes pulse{0%,100%{box-shadow:0 0 0 0 rgba(34,197,94,.35)}50%{box-shadow:0 0 0 5px rgba(34,197,94,0)}}

.hero-title{font-size:clamp(34px,5.5vw,64px);font-weight:800;line-height:1.1;letter-spacing:-1.5px;margin-bottom:20px}
.title-line{display:block}
.title-line.accent{background:linear-gradient(135deg,var(--accent-h),var(--cyan));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero-sub{font-size:17px;color:var(--text-1);max-width:580px;margin:0 auto 36px;line-height:1.7}
.hero-cta{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;margin-bottom:56px}

.hero-pillars{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--border);border-radius:var(--radius-lg);overflow:hidden;max-width:700px;margin:0 auto}
.pillar{background:var(--bg-card);padding:24px 20px;text-align:center}
.pillar h4{font-size:13px;font-weight:700;margin-bottom:4px}
.pillar p{font-size:12px;color:var(--text-2);line-height:1.5}

.hero-scroll{position:absolute;bottom:24px;left:50%;transform:translateX(-50%);display:flex;flex-direction:column;align-items:center;gap:6px}
.hero-scroll span{font-size:10px;color:var(--text-3);text-transform:uppercase;letter-spacing:2px}
.scroll-line{width:1px;height:32px;background:linear-gradient(to bottom,var(--accent),transparent);animation:scrollP 2s infinite}
@keyframes scrollP{0%,100%{opacity:.3}50%{opacity:1}}

/* --- Cards (generic) --- */
.card{
    background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);
    padding:32px;transition:all .3s var(--ease);
}
.card:hover{background:var(--bg-card-h);border-color:var(--border-h)}
.card-icon{
    width:44px;height:44px;display:flex;align-items:center;justify-content:center;
    border-radius:10px;background:var(--accent-glow);color:var(--accent-h);margin-bottom:18px;
}
.card h3{font-size:17px;font-weight:700;margin-bottom:6px}
.card p{font-size:14px;color:var(--text-1);line-height:1.65}

/* Feature grid */
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}

/* --- Pipeline --- */
.pipeline{display:flex;flex-direction:column;gap:40px}
.phase-label{
    font-family:var(--mono);font-size:11px;font-weight:600;color:var(--accent-h);
    text-transform:uppercase;letter-spacing:2px;margin-bottom:16px;padding-left:14px;border-left:2px solid var(--accent);
}
.module-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:14px}
.mod{
    background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);
    padding:24px;transition:all .3s var(--ease);position:relative;overflow:hidden;
}
.mod::before{content:'';position:absolute;top:0;left:0;right:0;height:2px}
.mod-math::before{background:linear-gradient(90deg,var(--cyan),transparent)}
.mod-ai::before{background:linear-gradient(90deg,var(--accent),transparent)}
.mod-consensus::before{background:linear-gradient(90deg,var(--green),transparent)}
.mod:hover{background:var(--bg-card-h);transform:translateY(-1px)}
.mod h4{font-size:15px;font-weight:700;margin-bottom:6px}
.mod p{font-size:13px;color:var(--text-1);line-height:1.6;margin-bottom:12px}
.mod-tags{display:flex;gap:6px;flex-wrap:wrap}

.tag{display:inline-block;font-size:10px;font-weight:600;padding:3px 9px;border-radius:100px;letter-spacing:.4px;text-transform:uppercase}
.tag-math{background:rgba(6,182,212,.08);color:var(--cyan)}
.tag-ai{background:var(--accent-glow);color:var(--accent-h)}
.tag-warn{background:rgba(239,68,68,.08);color:var(--red)}
.tag-ok{background:var(--green-glow);color:var(--green)}

/* --- Honesty box --- */
.honesty{
    background:var(--bg-2);border:1px solid var(--border);border-radius:var(--radius-lg);
    padding:36px;margin-top:48px;
}
.honesty h3{font-size:18px;font-weight:700;margin-bottom:16px;display:flex;align-items:center;gap:8px}
.honesty-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.honesty-col h4{font-size:13px;font-weight:700;text-transform:uppercase;letter-spacing:1px;margin-bottom:10px}
.honesty-col.does h4{color:var(--green)}
.honesty-col.doesnt h4{color:var(--red)}
.honesty-col li{font-size:13px;color:var(--text-1);padding:5px 0;padding-left:18px;position:relative;line-height:1.5}
.honesty-col.does li::before{content:'✓';position:absolute;left:0;color:var(--green);font-weight:700;font-size:12px}
.honesty-col.doesnt li::before{content:'✗';position:absolute;left:0;color:var(--red);font-weight:700;font-size:12px}

/* --- Method specifics --- */
.metric-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.metric{
    background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);
    padding:28px;text-align:center;
}
.metric-value{font-size:36px;font-weight:800;font-family:var(--mono);color:var(--accent-h);margin-bottom:4px}
.metric-label{font-size:12px;font-weight:600;text-transform:uppercase;letter-spacing:1px;color:var(--text-2);margin-bottom:8px}
.metric p{font-size:13px;color:var(--text-1);line-height:1.5}

.method-block{margin-bottom:48px}
.method-block h3{font-size:20px;font-weight:700;margin-bottom:12px}
.method-block p{font-size:14px;color:var(--text-1);line-height:1.7;margin-bottom:12px;max-width:720px}
.method-block ul{margin-left:0}
.method-block li{font-size:14px;color:var(--text-1);padding:4px 0;padding-left:20px;position:relative;line-height:1.6}
.method-block li::before{content:'—';position:absolute;left:0;color:var(--text-3)}

/* --- Waitlist / Form --- */
.waitlist-box{
    max-width:520px;margin:0 auto;background:var(--bg-card);border:1px solid var(--border);
    border-radius:var(--radius-lg);padding:40px;text-align:center;
}
.waitlist-box h3{font-size:22px;font-weight:700;margin-bottom:8px}
.waitlist-box p{font-size:14px;color:var(--text-1);margin-bottom:24px}
.form-row{display:flex;gap:10px}
.form-input{
    flex:1;padding:12px 16px;background:var(--bg-input);border:1px solid var(--border);
    border-radius:10px;color:var(--text-0);font-size:14px;font-family:var(--font);
    outline:none;transition:border .2s var(--ease);
}
.form-input:focus{border-color:var(--accent)}
.form-input::placeholder{color:var(--text-3)}
.form-msg{font-size:13px;margin-top:12px;color:var(--green);display:none}
.form-msg.show{display:block}
.form-msg.error{color:var(--red)}

/* --- Pricing --- */
.pricing-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;align-items:start}
.price-card{
    background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);
    padding:36px 28px;transition:all .3s var(--ease);position:relative;
}
.price-card:hover{border-color:var(--border-h)}
.price-card.featured{
    background:linear-gradient(135deg,var(--bg-card),rgba(99,102,241,.06));
    border-color:var(--accent);box-shadow:0 0 50px rgba(99,102,241,.1);
}
.price-badge{
    position:absolute;top:-11px;left:50%;transform:translateX(-50%);background:var(--accent);
    color:#fff;font-size:10px;font-weight:700;padding:3px 14px;border-radius:100px;text-transform:uppercase;letter-spacing:.8px;
}
.price-head{text-align:center;margin-bottom:28px;padding-bottom:20px;border-bottom:1px solid var(--border)}
.price-head h4{font-size:18px;font-weight:700;margin-bottom:6px}
.price-amount{font-size:42px;font-weight:800;font-family:var(--mono);line-height:1}
.price-period{font-size:12px;color:var(--text-3)}
.price-list{margin-bottom:28px}
.price-list li{font-size:13px;color:var(--text-1);padding:7px 0;padding-left:20px;position:relative}
.price-list li::before{content:'~';position:absolute;left:0;color:var(--accent-h);font-family:var(--mono);font-weight:700}
.price-card.featured .price-list li::before{content:'+';color:var(--green)}

/* --- Changelog --- */
.changelog-entry{border-bottom:1px solid var(--border);padding:28px 0}
.changelog-entry:last-child{border-bottom:none}
.cl-header{display:flex;align-items:center;gap:12px;margin-bottom:10px}
.cl-version{font-family:var(--mono);font-size:14px;font-weight:700;color:var(--accent-h)}
.cl-date{font-size:12px;color:var(--text-3);font-family:var(--mono)}
.cl-tag{font-size:10px;font-weight:600;padding:2px 8px;border-radius:100px;text-transform:uppercase}
.cl-tag-feat{background:var(--green-glow);color:var(--green)}
.cl-tag-fix{background:rgba(239,68,68,.08);color:var(--red)}
.cl-tag-improve{background:var(--accent-glow);color:var(--accent-h)}
.changelog-entry p{font-size:14px;color:var(--text-1);line-height:1.6}
.changelog-entry ul{margin-top:8px}
.changelog-entry li{font-size:13px;color:var(--text-1);padding:3px 0;padding-left:18px;position:relative}
.changelog-entry li::before{content:'•';position:absolute;left:4px;color:var(--text-3)}

/* --- FAQ --- */
.faq-item{border-bottom:1px solid var(--border);padding:20px 0}
.faq-q{font-size:15px;font-weight:600;cursor:pointer;display:flex;justify-content:space-between;align-items:center;color:var(--text-0);transition:color .2s}
.faq-q:hover{color:var(--accent-h)}
.faq-q::after{content:'+';font-family:var(--mono);font-size:18px;color:var(--text-3);transition:transform .3s var(--ease)}
.faq-item.open .faq-q::after{transform:rotate(45deg);color:var(--accent-h)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .4s var(--ease)}
.faq-item.open .faq-a{max-height:300px}
.faq-a p{font-size:14px;color:var(--text-1);line-height:1.7;padding-top:12px}

/* --- Legal --- */
.legal-content{max-width:720px;margin:0 auto}
.legal-content h3{font-size:18px;font-weight:700;margin-top:32px;margin-bottom:10px}
.legal-content p{font-size:14px;color:var(--text-1);line-height:1.7;margin-bottom:12px}
.legal-content ul{margin-bottom:16px}
.legal-content li{font-size:14px;color:var(--text-1);padding:3px 0;padding-left:18px;position:relative;line-height:1.6}
.legal-content li::before{content:'—';position:absolute;left:0;color:var(--text-3)}
.legal-tabs{display:flex;gap:8px;margin-bottom:36px;flex-wrap:wrap}
.legal-tab{
    padding:8px 18px;border-radius:100px;font-size:13px;font-weight:500;
    border:1px solid var(--border);background:transparent;color:var(--text-2);transition:all .2s var(--ease);
}
.legal-tab:hover,.legal-tab.active{border-color:var(--accent);color:var(--accent-h);background:var(--accent-glow)}
.legal-panel{display:none}
.legal-panel.active{display:block}

/* --- Footer --- */
.footer{background:var(--bg-1);border-top:1px solid var(--border);padding:56px 0 28px}
.footer-top{display:flex;justify-content:space-between;margin-bottom:40px}
.footer-brand{max-width:260px}
.footer-logo{display:flex;align-items:center;gap:8px;font-weight:700;font-size:17px;margin-bottom:8px}
.footer-brand p{font-size:13px;color:var(--text-3);line-height:1.5}
.footer-links{display:flex;gap:56px}
.footer-col h5{font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:1.5px;margin-bottom:14px;color:var(--text-2)}
.footer-col a{display:block;font-size:13px;color:var(--text-3);padding:3px 0;transition:color .2s var(--ease)}
.footer-col a:hover{color:var(--text-0)}
.footer-bottom{padding-top:24px;border-top:1px solid var(--border);display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px}
.footer-bottom p{font-size:12px;color:var(--text-3)}
.footer-disclaimer{max-width:440px;text-align:right;font-size:11px!important}

/* --- Animations --- */
[data-v]{opacity:0;transform:translateY(20px);transition:opacity .5s var(--ease),transform .5s var(--ease)}
[data-v].vis{opacity:1;transform:translateY(0)}

/* ============================================
   RESPONSIVE
   ============================================ */
@media(max-width:1024px){
    .grid-3{grid-template-columns:repeat(2,1fr)}
    .grid-4{grid-template-columns:repeat(2,1fr)}
    .metric-grid{grid-template-columns:repeat(2,1fr)}
    .pricing-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:768px){
    :root{--section-py:72px}
    .nav-links{display:none;position:absolute;top:var(--nav-h);left:0;right:0;background:rgba(8,8,13,.97);backdrop-filter:blur(20px);flex-direction:column;padding:20px 24px;gap:14px;border-bottom:1px solid var(--border)}
    .nav-links.open{display:flex}
    .nav-toggle{display:flex}
    .nav-actions .btn-sm{display:none}
    .grid-2,.grid-3,.grid-4,.metric-grid{grid-template-columns:1fr}
    .pricing-grid{grid-template-columns:1fr;max-width:380px;margin-left:auto;margin-right:auto}
    .price-card.featured{transform:none;box-shadow:0 0 40px rgba(99,102,241,.08)}
    .hero-pillars{grid-template-columns:1fr;max-width:320px}
    .honesty-grid{grid-template-columns:1fr}
    .form-row{flex-direction:column}
    .footer-top{flex-direction:column;gap:32px}
    .footer-links{flex-wrap:wrap;gap:28px}
    .footer-bottom{flex-direction:column;text-align:center}
    .footer-disclaimer{text-align:center}
    .hero-scroll{display:none}
    .hero-content{padding:40px 0}
}
@media(max-width:480px){
    .module-row{grid-template-columns:1fr}
    .hero-title{letter-spacing:-1px}
    .legal-tabs{justify-content:center}
}

/* ============================================
   LANGUAGE TOGGLE
   ============================================ */
.lang-toggle{
    display:inline-flex;align-items:center;gap:2px;
    background:var(--bg-input);border:1px solid var(--border);border-radius:100px;
    padding:2px;margin-right:8px;
}
.lang-btn{
    padding:4px 10px;border-radius:100px;border:none;background:transparent;
    font-size:11px;font-weight:600;color:var(--text-3);cursor:pointer;
    transition:all .2s var(--ease);letter-spacing:.5px;font-family:var(--mono);
}
.lang-btn.active{background:var(--accent);color:#fff;box-shadow:0 0 10px rgba(99,102,241,.3)}
.lang-btn:hover:not(.active){color:var(--text-1)}

/* ============================================
   VIDEO SHOWCASE — Immersive Background
   ============================================ */
.video-showcase{
    position:relative;overflow:hidden;
    background:var(--bg-0);
    padding:60px 0 0;
}
.video-showcase .section-header{margin-bottom:24px}
.video-stage{
    position:relative;
    max-width:420px;
    margin:0 auto;
    overflow:hidden;
}
.video-stage video{
    width:100%;display:block;
    background:transparent;
    border-radius:16px;
}
/* Edge-blending vignette — fades video edges into site bg */
.video-vignette{
    position:absolute;inset:0;pointer-events:none;z-index:1;
    border-radius:16px;
    background:
        linear-gradient(to bottom,  var(--bg-0) 0%, transparent 12%, transparent 90%, var(--bg-0) 100%),
        linear-gradient(to right,   var(--bg-0) 0%, transparent 14%, transparent 86%, var(--bg-0) 100%);
}
/* Ambient glow behind the video */
.video-stage::before{
    content:'';position:absolute;
    inset:-60px;z-index:-1;pointer-events:none;
    background:radial-gradient(ellipse 70% 60% at 50% 50%, rgba(99,102,241,.08), transparent 70%);
}

@media(max-width:768px){
    .video-showcase{padding:40px 0 0}
    .video-stage{max-width:320px}
    .lang-toggle{margin-right:4px}
    .lang-btn{padding:3px 8px;font-size:10px}
}