/* Kulachi AI — landing stylesheet. Design: glass-morphism header,
   gradient hero, animated cards, pricing grid. Font: Manrope. */

*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
:root{
    --primary:#4f46e5;
    --primary-dark:#3730a3;
    --primary-light:#6366f1;
    --violet:#a855f7;
    --accent:#f59e0b;
    --text:#0f172a;
    --text-light:#64748b;
    --text-muted:#94a3b8;
    --bg:#f6f7fb;
    --white:#fff;
    --radius:22px;
    --radius-sm:14px;
    --shadow:0 4px 6px -1px rgba(0,0,0,.07),0 2px 4px -2px rgba(0,0,0,.05);
    --shadow-lg:0 20px 25px -5px rgba(0,0,0,.1),0 8px 10px -6px rgba(0,0,0,.08);
    --shadow-xl:0 25px 50px -12px rgba(0,0,0,.25);
}
html{scroll-behavior:smooth}
body{font-family:'Manrope',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;background:var(--bg);color:var(--text);line-height:1.65;overflow-x:hidden;-webkit-font-smoothing:antialiased}
a{text-decoration:none;color:inherit}
.container{max-width:1160px;margin:0 auto;padding:0 22px}

/* ===== Header ===== */
.header{background:rgba(255,255,255,.82);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);box-shadow:0 1px 0 rgba(0,0,0,.06);position:sticky;top:0;z-index:1000}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:70px;gap:16px}
.logo{display:flex;align-items:center;gap:9px;font-size:22px;font-weight:800;letter-spacing:-.6px}
.logo-icon{display:flex;filter:drop-shadow(0 3px 6px rgba(99,102,241,.35))}
.logo-text{color:var(--text)}
.logo-accent{color:var(--primary)}
.nav{display:flex;align-items:center;gap:6px}
.nav-link{color:var(--text-light);font-weight:600;font-size:14.5px;padding:8px 14px;border-radius:100px;transition:all .2s}
.nav-link:hover{color:var(--primary);background:rgba(79,70,229,.08)}

/* ===== Buttons ===== */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 24px;border:none;border-radius:100px;font-size:15px;font-weight:700;font-family:inherit;cursor:pointer;transition:all .18s;white-space:nowrap}
.btn-nav{background:linear-gradient(135deg,var(--primary) 0%,var(--violet) 100%);color:#fff;padding:10px 22px;box-shadow:0 6px 16px rgba(99,102,241,.32)}
.btn-nav:hover{transform:translateY(-2px);box-shadow:0 10px 22px rgba(99,102,241,.45)}
.btn-ghost{color:var(--text-light);font-weight:600}
.btn-ghost:hover{color:var(--primary)}
.btn-hero{background:#fff;color:var(--primary-dark);padding:16px 34px;font-size:16.5px;box-shadow:0 10px 30px rgba(0,0,0,.18)}
.btn-hero:hover{transform:translateY(-3px);box-shadow:0 18px 40px rgba(0,0,0,.25)}
.btn-hero .arrow{transition:transform .2s}
.btn-hero:hover .arrow{transform:translateX(4px)}
.btn-hero-outline{background:rgba(255,255,255,.12);color:#fff;border:1.5px solid rgba(255,255,255,.5);padding:15px 30px;font-size:16px;backdrop-filter:blur(6px)}
.btn-hero-outline:hover{background:rgba(255,255,255,.22)}

/* ===== Hero ===== */
.hero{position:relative;overflow:hidden;padding:72px 0 84px;text-align:center;color:#fff}
.hero-bg{position:absolute;inset:0;z-index:-1;background:linear-gradient(135deg,#4338ca 0%,#6d28d9 45%,#7c3aed 70%,#8b5cf6 100%)}
.hero-bg::before{content:'';position:absolute;inset:0;background:radial-gradient(ellipse 80% 60% at 50% -10%,rgba(255,255,255,.22) 0%,transparent 65%)}
.hero-bg::after{content:'';position:absolute;width:680px;height:680px;border-radius:50%;background:radial-gradient(circle,rgba(168,85,247,.45),transparent 70%);top:-320px;right:-160px;filter:blur(20px)}
.hero-content{position:relative;z-index:1;max-width:820px;margin:0 auto}
.hero-badge{display:inline-block;background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.25);padding:8px 18px;border-radius:100px;font-size:13.5px;font-weight:600;margin-bottom:26px;backdrop-filter:blur(8px)}
.hero-title{font-size:clamp(34px,5.4vw,58px);font-weight:800;letter-spacing:-2px;line-height:1.08;margin-bottom:20px;text-shadow:0 3px 30px rgba(0,0,0,.18)}
.hero-subtitle{font-size:clamp(16px,2vw,19px);opacity:.94;font-weight:500;margin-bottom:36px;max-width:620px;margin-left:auto;margin-right:auto}
.hero-actions{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;margin-bottom:16px}
.hero-note{font-size:13.5px;opacity:.75;margin-bottom:34px}
.hero-models{display:flex;gap:10px;justify-content:center;flex-wrap:wrap}
.model-pill{background:rgba(255,255,255,.13);border:1px solid rgba(255,255,255,.22);padding:8px 18px;border-radius:100px;font-size:13.5px;font-weight:700;backdrop-filter:blur(6px)}

/* ===== Sections ===== */
.section-header{text-align:center;margin-bottom:48px}
.section-title{font-size:clamp(26px,4vw,40px);font-weight:800;letter-spacing:-1.2px;margin-bottom:10px}
.section-subtitle{color:var(--text-light);font-size:17px;font-weight:500;max-width:600px;margin:0 auto}

/* ===== Features ===== */
.features{padding:88px 0}
.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:22px}
.feature-card{background:var(--white);border-radius:var(--radius);padding:30px;box-shadow:var(--shadow);border:1px solid rgba(15,23,42,.05);transition:transform .25s,box-shadow .25s;animation:fadeInUp .5s ease both}
.feature-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.feature-icon{font-size:34px;margin-bottom:16px;display:block}
.feature-card h3{font-size:19px;font-weight:800;letter-spacing:-.4px;margin-bottom:8px}
.feature-card p{color:var(--text-light);font-size:15px}
.feature-card:nth-child(1){animation-delay:.03s}.feature-card:nth-child(2){animation-delay:.08s}.feature-card:nth-child(3){animation-delay:.13s}
.feature-card:nth-child(4){animation-delay:.18s}.feature-card:nth-child(5){animation-delay:.23s}.feature-card:nth-child(6){animation-delay:.28s}

/* ===== How it works ===== */
.how{padding:88px 0;background:var(--white)}
.steps{display:flex;align-items:stretch;justify-content:center;gap:12px;flex-wrap:wrap}
.step{flex:1;min-width:240px;max-width:320px;text-align:center;padding:12px}
.step-num{width:54px;height:54px;margin:0 auto 18px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:22px;font-weight:800;color:#fff;background:linear-gradient(135deg,var(--primary),var(--violet));box-shadow:0 8px 20px rgba(99,102,241,.35)}
.step h3{font-size:19px;font-weight:800;margin-bottom:8px;letter-spacing:-.3px}
.step p{color:var(--text-light);font-size:15px}
.step-arrow{align-self:center;font-size:26px;color:var(--text-muted);font-weight:700;padding-bottom:20px}

/* ===== Pricing ===== */
.pricing{padding:88px 0}
.pricing-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(290px,1fr));gap:24px;align-items:stretch}
.price-card{position:relative;background:var(--white);border-radius:var(--radius);padding:34px 28px;box-shadow:var(--shadow);border:1.5px solid rgba(15,23,42,.06);display:flex;flex-direction:column;transition:transform .25s,box-shadow .25s}
.price-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.price-card--featured{background:linear-gradient(160deg,#4f46e5 0%,#7c3aed 60%,#9333ea 100%);color:#fff;border:none;box-shadow:0 25px 50px -12px rgba(99,102,241,.6);transform:scale(1.03)}
.price-card--featured:hover{transform:scale(1.03) translateY(-6px)}
.price-badge{position:absolute;top:-13px;left:50%;transform:translateX(-50%);background:var(--accent);color:#422006;font-size:12px;font-weight:800;padding:6px 16px;border-radius:100px;letter-spacing:.4px;text-transform:uppercase;box-shadow:0 6px 16px rgba(245,158,11,.4)}
.price-name{font-size:22px;font-weight:800;letter-spacing:-.5px}
.price-desc{font-size:14px;color:var(--text-light);margin:4px 0 18px;min-height:40px}
.price-card--featured .price-desc{color:rgba(255,255,255,.82)}
.price-value{display:flex;align-items:baseline;gap:6px;margin-bottom:22px}
.amount{font-size:46px;font-weight:800;letter-spacing:-2px;line-height:1}
.cur{font-size:17px;font-weight:600;color:var(--text-light)}
.price-card--featured .cur{color:rgba(255,255,255,.8)}
.price-list{list-style:none;margin-bottom:26px;flex:1}
.price-list li{position:relative;padding:7px 0 7px 30px;font-size:15px}
.price-list li::before{content:'✓';position:absolute;left:0;top:7px;font-weight:800;color:var(--primary)}
.price-card--featured .price-list li::before{color:#4ade80}
.btn-price{background:rgba(79,70,229,.1);color:var(--primary);width:100%;padding:14px}
.btn-price:hover{background:var(--primary);color:#fff}
.btn-price-featured{background:#fff;color:var(--primary-dark);width:100%;padding:14px;box-shadow:0 8px 20px rgba(0,0,0,.2)}
.btn-price-featured:hover{transform:translateY(-2px);box-shadow:0 12px 28px rgba(0,0,0,.28)}
.pricing-note{text-align:center;color:var(--text-light);font-size:14.5px;margin-top:30px}

/* ===== FAQ ===== */
.faq{padding:88px 0;background:var(--white)}
.faq-list{max-width:780px;margin:0 auto;display:flex;flex-direction:column;gap:12px}
.faq-item{background:var(--bg);border-radius:var(--radius-sm);border:1px solid rgba(15,23,42,.06);overflow:hidden;transition:box-shadow .2s}
.faq-item[open]{box-shadow:var(--shadow)}
.faq-item summary{cursor:pointer;list-style:none;padding:20px 24px;font-weight:700;font-size:16.5px;display:flex;justify-content:space-between;align-items:center;gap:12px}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:'+';font-size:24px;font-weight:600;color:var(--primary);transition:transform .2s;flex-shrink:0}
.faq-item[open] summary::after{transform:rotate(45deg)}
.faq-item p{padding:0 24px 22px;color:var(--text-light);font-size:15px}

/* ===== Final CTA ===== */
.cta-final{padding:76px 0;text-align:center;background:linear-gradient(135deg,#4338ca 0%,#7c3aed 100%);color:#fff}
.cta-final h2{font-size:clamp(26px,4vw,38px);font-weight:800;letter-spacing:-1.2px;margin-bottom:14px}
.cta-final p{opacity:.92;font-size:17px;margin-bottom:30px;font-weight:500}

/* ===== Footer ===== */
.footer{background:#0f172a;color:var(--text-muted);padding:52px 0}
.footer-inner{text-align:center}
.footer-brand{font-size:23px;font-weight:800;margin-bottom:14px;color:#fff;letter-spacing:-.5px}
.footer-brand span{color:var(--primary-light)}
.footer-text{font-size:14.5px;margin-bottom:16px;max-width:460px;margin-left:auto;margin-right:auto}
.footer-copy{font-size:13.5px;opacity:.65}
.footer-copy a{color:var(--primary-light);font-weight:600}
.footer-copy a:hover{text-decoration:underline}

@keyframes fadeInUp{from{opacity:0;transform:translateY(22px)}to{opacity:1;transform:translateY(0)}}

/* ===== Responsive ===== */
@media(max-width:900px){
    .nav-link{display:none}
}
@media(max-width:768px){
    .hero{padding:52px 0 60px}
    .hero-actions{flex-direction:column;align-items:center}
    .btn-hero,.btn-hero-outline{width:100%;max-width:340px}
    .step-arrow{display:none}
    .steps{flex-direction:column;align-items:center}
    .price-card--featured{transform:none}
    .price-card--featured:hover{transform:translateY(-6px)}
    .features,.how,.pricing,.faq{padding:60px 0}
    .header-inner{height:62px}
    .logo-text{font-size:20px}
}