/* ===== RESET & BASE ===== */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:80px}
body{font-family:'Inter',sans-serif;background:#0a0a0f;color:#e0e0e8;line-height:1.6;overflow-x:hidden}
a{color:inherit;text-decoration:none}
.container{max-width:1140px;margin:0 auto;padding:0 24px}

/* ===== NAV ===== */
#navbar{position:fixed;top:0;left:0;right:0;z-index:100;padding:16px 32px;transition:all .3s}
#navbar.scrolled{background:rgba(10,10,15,.92);backdrop-filter:blur(16px);border-bottom:1px solid rgba(255,255,255,.06);padding:10px 32px}
.nav-inner{max-width:1140px;margin:0 auto;display:flex;align-items:center;justify-content:space-between}
.logo{font-size:1.3rem;font-weight:700;letter-spacing:-.5px}
.logo span{background:linear-gradient(135deg,#6366f1,#06b6d4);-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.nav-links{display:flex;align-items:center;gap:28px;font-size:.9rem;font-weight:500}
.nav-links a:hover{color:#06b6d4}
#langToggle{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.15);color:#fff;padding:4px 14px;border-radius:6px;cursor:pointer;font-size:.8rem;font-weight:600;transition:.2s}
#langToggle:hover{background:rgba(99,102,241,.3)}
.btn-nav{background:linear-gradient(135deg,#6366f1,#4f46e5);padding:8px 20px;border-radius:8px;font-weight:600;font-size:.85rem;transition:.3s}
.btn-nav:hover{transform:translateY(-1px);box-shadow:0 8px 24px rgba(99,102,241,.35)}
.mobile-menu{display:none;font-size:1.6rem;cursor:pointer}

/* ===== BUTTONS ===== */
.btn{display:inline-block;padding:14px 32px;border-radius:12px;font-weight:600;font-size:1rem;transition:all .3s;cursor:pointer;border:none}
.btn-primary{background:linear-gradient(135deg,#6366f1,#4f46e5);color:#fff;box-shadow:0 4px 20px rgba(99,102,241,.3)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 32px rgba(99,102,241,.45)}
.btn-ghost{background:transparent;color:#c4c4d0;border:1px solid rgba(255,255,255,.15)}
.btn-ghost:hover{background:rgba(255,255,255,.05);color:#fff}
.btn-lg{padding:18px 40px;font-size:1.1rem}

/* ===== HERO ===== */
#hero{position:relative;min-height:100vh;display:flex;align-items:center;justify-content:center;text-align:center;padding:120px 24px 80px}
.hero-bg{position:absolute;inset:0;background:radial-gradient(ellipse at 50% 0%,rgba(99,102,241,.15) 0%,transparent 60%),radial-gradient(ellipse at 80% 50%,rgba(6,182,212,.08) 0%,transparent 50%)}
.hero-content{position:relative;max-width:800px}
.badge{display:inline-block;background:rgba(99,102,241,.12);border:1px solid rgba(99,102,241,.25);color:#a5b4fc;padding:6px 18px;border-radius:100px;font-size:.8rem;font-weight:600;letter-spacing:.5px;text-transform:uppercase;margin-bottom:24px}
#hero h1{font-size:clamp(2.2rem,5vw,3.6rem);font-weight:800;line-height:1.15;letter-spacing:-.02em;margin-bottom:20px;background:linear-gradient(180deg,#fff 30%,rgba(255,255,255,.6));-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.hero-sub{font-size:1.15rem;color:#9ca3af;max-width:600px;margin:0 auto 36px;line-height:1.7}
.hero-btns{display:flex;gap:16px;justify-content:center;flex-wrap:wrap;margin-bottom:56px}
.hero-stats{display:flex;justify-content:center;gap:48px}
.hero-stats div{text-align:center}
.hero-stats strong{display:block;font-size:1.8rem;background:linear-gradient(135deg,#6366f1,#06b6d4);-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.hero-stats span{font-size:.8rem;color:#6b7280;text-transform:uppercase;letter-spacing:.5px}

/* ===== SECTIONS ===== */
section{padding:100px 0}
.section-badge{display:inline-block;background:rgba(99,102,241,.1);color:#a5b4fc;padding:5px 16px;border-radius:100px;font-size:.75rem;font-weight:600;letter-spacing:1px;text-transform:uppercase;margin-bottom:16px}
section h2{font-size:clamp(1.8rem,3.5vw,2.6rem);font-weight:800;letter-spacing:-.02em;margin-bottom:56px;line-height:1.2}
#features,#usecases{text-align:center}
#how{text-align:center;background:rgba(255,255,255,.02)}

/* ===== FEATURES GRID ===== */
.features-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.feature-card{background:rgba(255,255,255,.03);border:1px solid rgba(255,255,255,.06);border-radius:16px;padding:36px 28px;text-align:left;transition:all .4s;opacity:0;transform:translateY(24px)}
.feature-card.visible{opacity:1;transform:translateY(0)}
.feature-card:hover{background:rgba(99,102,241,.06);border-color:rgba(99,102,241,.2);transform:translateY(-4px)}
.feature-icon{font-size:2rem;margin-bottom:16px}
.feature-card h3{font-size:1.1rem;font-weight:700;margin-bottom:10px;color:#fff}
.feature-card p{font-size:.9rem;color:#9ca3af;line-height:1.6}

/* ===== STEPS ===== */
.steps{display:flex;align-items:flex-start;justify-content:center;gap:0;max-width:900px;margin:0 auto}
.step{flex:1;padding:0 24px;opacity:0;transform:translateY(24px);transition:all .5s}
.step.visible{opacity:1;transform:translateY(0)}
.step-num{width:52px;height:52px;border-radius:14px;background:linear-gradient(135deg,#6366f1,#4f46e5);display:flex;align-items:center;justify-content:center;font-size:1.3rem;font-weight:800;color:#fff;margin:0 auto 20px}
.step h3{font-size:1.05rem;font-weight:700;margin-bottom:10px;color:#fff}
.step p{font-size:.88rem;color:#9ca3af;line-height:1.6}
.step-line{width:80px;height:2px;background:linear-gradient(90deg,rgba(99,102,241,.4),rgba(6,182,212,.2));margin-top:26px;flex-shrink:0}

/* ===== USE CASES ===== */
.usecases-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.usecase-card{background:rgba(255,255,255,.03);border:1px solid rgba(255,255,255,.06);border-radius:16px;padding:32px 24px;text-align:center;transition:all .4s;opacity:0;transform:translateY(24px)}
.usecase-card.visible{opacity:1;transform:translateY(0)}
.usecase-card:hover{background:rgba(6,182,212,.06);border-color:rgba(6,182,212,.2);transform:translateY(-4px)}
.usecase-icon{font-size:2.4rem;margin-bottom:14px}
.usecase-card h3{font-size:1rem;font-weight:700;margin-bottom:8px;color:#fff}
.usecase-card p{font-size:.85rem;color:#9ca3af;line-height:1.5}

/* ===== CTA ===== */
#cta{text-align:center;padding:100px 24px;background:linear-gradient(180deg,rgba(99,102,241,.06),transparent)}
#cta h2{margin-bottom:16px}
#cta p{font-size:1.1rem;color:#9ca3af;max-width:550px;margin:0 auto 36px}

/* ===== FOOTER ===== */
footer{padding:48px 0;border-top:1px solid rgba(255,255,255,.06);text-align:center}
.footer-logo{font-size:1.2rem;font-weight:700;margin-bottom:8px}
.footer-logo span{color:#6b7280;font-weight:400;font-size:.9rem}
footer p{font-size:.85rem;color:#6b7280;margin-bottom:20px}
.footer-bottom{font-size:.75rem;color:#4b5563}

/* ===== RESPONSIVE ===== */
@media(max-width:900px){
    .features-grid{grid-template-columns:repeat(2,1fr)}
    .usecases-grid{grid-template-columns:repeat(2,1fr)}
    .steps{flex-direction:column;gap:32px;align-items:center}
    .step-line{width:2px;height:40px;margin:0}
}
@media(max-width:640px){
    .features-grid,.usecases-grid{grid-template-columns:1fr}
    .nav-links{display:none;position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(10,10,15,.97);flex-direction:column;justify-content:center;gap:32px;font-size:1.2rem}
    .nav-links.open{display:flex}
    .mobile-menu{display:block}
    .hero-stats{gap:24px}
    .hero-stats strong{font-size:1.4rem}
    section{padding:64px 0}
}