:root{--primary:#4f46e5;--primary-dark:#3730a3;--accent:#06b6d4;--text:#1f2937;--muted:#6b7280;--bg:#f9fafb;--card:#fff;--radius:14px}
*{box-sizing:border-box;margin:0;padding:0}
[hidden]{display:none!important}
body{font-family:'Inter',system-ui,-apple-system,sans-serif;color:var(--text);background:var(--bg);line-height:1.6}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{width:min(1140px,92%);margin:auto}
/* Header */
header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.9);backdrop-filter:blur(10px);border-bottom:1px solid #e5e7eb}
.nav{display:flex;align-items:center;justify-content:space-between;height:70px}
.logo{font-weight:800;font-size:1.35rem;color:var(--primary)}
.logo span{color:var(--accent)}
.nav ul{display:flex;gap:2rem;list-style:none;align-items:center}
.nav a{font-weight:500;color:var(--muted);transition:.2s}
.nav a:hover,.nav a.active{color:var(--primary)}
.menu-btn{display:none;background:none;border:0;font-size:1.6rem;cursor:pointer;color:var(--text)}
/* Buttons */
.btn{display:inline-block;padding:.8rem 1.6rem;border-radius:999px;font-weight:600;transition:.2s;border:0;cursor:pointer;font-size:1rem}
.btn-primary{background:var(--primary);color:#fff!important}
.btn-primary:hover{background:var(--primary-dark);transform:translateY(-2px)}
.btn-outline{border:2px solid #fff;color:#fff}
.btn-outline:hover{background:#fff;color:var(--primary)}
/* Hero */
.hero{background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;padding:7rem 0 6rem;text-align:center}
.hero h1{font-size:clamp(2.2rem,5vw,3.6rem);line-height:1.15;margin-bottom:1rem}
.hero p{font-size:1.2rem;opacity:.92;max-width:640px;margin:0 auto 2rem}
.hero .actions{display:flex;gap:1rem;justify-content:center;flex-wrap:wrap}
.page-hero{padding:4.5rem 0 4rem}
/* Sections */
section{padding:5rem 0}
.section-title{text-align:center;margin-bottom:3rem}
.section-title h2{font-size:2.1rem;margin-bottom:.5rem}
.section-title p{color:var(--muted);max-width:600px;margin:auto}
.grid{display:grid;gap:1.5rem;grid-template-columns:repeat(auto-fit,minmax(250px,1fr))}
.card{background:var(--card);padding:2rem;border-radius:var(--radius);box-shadow:0 4px 20px rgba(0,0,0,.05);transition:.25s}
.card:hover{transform:translateY(-6px);box-shadow:0 12px 30px rgba(79,70,229,.15)}
.icon{width:54px;height:54px;border-radius:12px;background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;display:grid;place-items:center;font-size:1.5rem;margin-bottom:1rem}
.card h3{margin-bottom:.5rem}
.card p{color:var(--muted)}
.card ul{color:var(--muted);margin:.8rem 0 0 1.1rem}
.price{font-size:1.4rem;font-weight:700;color:var(--primary);margin-top:1rem}
.stats{background:#111827;color:#fff;padding:3.5rem 0}
.stats .grid{text-align:center}
.stats strong{display:block;font-size:2.5rem;color:var(--accent)}
.split{display:grid;grid-template-columns:1fr 1fr;gap:3rem;align-items:center}
.split img{border-radius:var(--radius);box-shadow:0 10px 30px rgba(0,0,0,.1)}
.split p{color:var(--muted);margin-bottom:1rem}
.team img{border-radius:50%;width:110px;height:110px;object-fit:cover;margin:0 auto 1rem}
.team .card{text-align:center}
.quote{font-style:italic}
.quote b{display:block;font-style:normal;margin-top:1rem;color:var(--text)}
.cta{background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;text-align:center;border-radius:var(--radius);padding:3.5rem 2rem}
.cta h2{margin-bottom:.8rem}
.cta p{opacity:.9;margin-bottom:1.5rem}
.cta .btn{background:#fff;color:var(--primary)}
/* Contact */
form{display:grid;gap:1rem}
.row{display:grid;grid-template-columns:1fr 1fr;gap:1rem}
input,textarea,select{width:100%;padding:.85rem 1rem;border:1px solid #d1d5db;border-radius:10px;font:inherit;background:#fff}
input:focus,textarea:focus,select:focus{outline:2px solid var(--primary);border-color:transparent}
.info-item{display:flex;gap:1rem;margin-bottom:1.4rem}
.info-item .icon{flex-shrink:0;margin:0;width:46px;height:46px;font-size:1.2rem}
.success{background:#d1fae5;color:#065f46;padding:1rem;border-radius:10px}
.map{border:0;width:100%;height:320px;border-radius:var(--radius)}
/* Footer */
footer{background:#111827;color:#9ca3af;padding:3.5rem 0 1.5rem}
footer .grid{margin-bottom:2rem}
footer h4{color:#fff;margin-bottom:.8rem}
footer a:hover{color:#fff}
footer li{list-style:none;margin-bottom:.4rem}
.copy{border-top:1px solid #374151;padding-top:1.5rem;text-align:center;font-size:.9rem}
/* Animation */
.reveal{opacity:0;transform:translateY(30px);transition:.7s}
.reveal.show{opacity:1;transform:none}
/* Learning app */
.btn-light{background:#eef2ff;color:var(--primary)}
.btn-light:hover{background:#e0e7ff}
.btn-success{background:#10b981;color:#fff}
.muted{color:var(--muted)}
.back{display:inline-block;margin-bottom:1rem;color:var(--primary);font-weight:600}
.lang-card{display:block;text-align:center}
.flag{font-size:3rem;margin-bottom:.5rem}
.bar{height:8px;background:#e5e7eb;border-radius:99px;overflow:hidden;margin:1rem 0 .4rem}
.bar span{display:block;height:100%;background:linear-gradient(90deg,var(--primary),var(--accent));transition:width .4s}
.lesson-actions{display:flex;gap:.6rem;flex-wrap:wrap;margin-top:1rem}
.lesson-actions .btn{padding:.6rem 1.1rem;font-size:.95rem}
.flashcard{width:min(420px,100%);height:250px;margin:0 auto;perspective:1000px;cursor:pointer}
.fc-inner{position:relative;width:100%;height:100%;transition:transform .5s;transform-style:preserve-3d}
.flashcard.flipped .fc-inner{transform:rotateY(180deg)}
.fc-face{position:absolute;inset:0;backface-visibility:hidden;border-radius:var(--radius);display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:1.5rem;font-size:1.8rem;font-weight:700;background:#fff;box-shadow:0 10px 30px rgba(79,70,229,.15)}
.fc-face small{font-size:.9rem;font-weight:400;color:var(--muted);margin-top:.8rem}
.back-face{transform:rotateY(180deg);background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff}
.back-face small{color:#e0e7ff}
.fc-controls{display:flex;gap:.6rem;justify-content:center;flex-wrap:wrap;margin-top:1.5rem}
.quiz,.result{max-width:560px;margin:auto;text-align:center}
.quiz h2{margin:.5rem 0 1.5rem}
.icon-btn{background:none;border:0;font-size:1.3rem;cursor:pointer}
.options{display:grid;gap:.7rem}
.opt{padding:.9rem;border:2px solid #e5e7eb;border-radius:10px;background:#fff;font:inherit;font-weight:500;cursor:pointer;transition:.15s}
.opt:hover:not(:disabled){border-color:var(--primary)}
.opt.right{background:#d1fae5;border-color:#10b981}
.opt.wrong{background:#fee2e2;border-color:#ef4444}
@media(max-width:800px){
 .menu-btn{display:block}
 .nav ul{position:absolute;top:70px;left:0;right:0;background:#fff;flex-direction:column;gap:0;padding:1rem 0;display:none;box-shadow:0 10px 20px rgba(0,0,0,.08)}
 .nav ul.open{display:flex}
 .nav li{padding:.7rem 0}
 .split,.row{grid-template-columns:1fr}
 section{padding:3.5rem 0}
 .hero{padding:5rem 0 4rem}
}