body{
margin:0;
font-family:'Inter',sans-serif;
background:#0b0f19;
color:white;
}

/* HEADER */
header{
position:fixed;
top:0;
width:100%;
z-index:1000;
background:rgba(10,15,25,0.55);
backdrop-filter:blur(16px);
border-bottom:1px solid rgba(255,255,255,0.06);
}

.nav{
display:flex;
justify-content:space-between;
align-items:center;
padding:14px 40px;
}

.logo{
font-weight:800;
letter-spacing:2px;
}

/* MENU */
.menu{
list-style:none;
margin:0;
padding:0;
display:flex;
gap:10px;
}

.menu>li{
position:relative;
}

.menu>li>a{
color:#cbd5e1;
text-decoration:none;
padding:10px 14px;
border-radius:10px;
transition:.25s;
font-size:14px;
}

.menu>li>a:hover{
background:rgba(59,130,246,0.15);
color:white;
}

/* MEGA MENU */
.mega{
position:absolute;
top:52px;
left:50%;
transform:translate(-50%,10px);
width:720px;
background:rgba(17,24,39,0.98);
backdrop-filter:blur(14px);
border:1px solid rgba(255,255,255,0.06);
border-radius:16px;
box-shadow:0 25px 60px rgba(0,0,0,0.6);
opacity:0;
visibility:hidden;
transition:.2s;
padding:20px;
}

.menu li:hover .mega{
opacity:1;
visibility:visible;
transform:translate(-50%,0);
}

.mega-grid{
display:grid;
grid-template-columns:repeat(3,1fr);
gap:20px;
}

.mega-section{
padding:12px;
border-radius:12px;
background:rgba(255,255,255,0.03);
}

.mega h4{
margin:0 0 10px;
font-size:13px;
color:#60a5fa;
}

.mega a{
display:block;
color:#cbd5e1;
text-decoration:none;
padding:6px 0;
font-size:13px;
transition:.2s;
}

.mega a:hover{
color:white;
transform:translateX(4px);
}

/* AUTH */
.auth-buttons a{
margin-left:10px;
padding:8px 14px;
border-radius:12px;
text-decoration:none;
font-size:13px;
}

.login{
border:1px solid #3b82f6;
color:#3b82f6;
}

.register{
background:#3b82f6;
color:white;
}

/* HERO */
.hero{
height:100vh;
display:flex;
flex-direction:column;
justify-content:center;
align-items:center;
text-align:center;
background:radial-gradient(circle at 30% 30%,#1e3a8a,#020617);
}

.hero h1{font-size:60px;margin:0}
.hero p{opacity:.7;margin-top:10px}

.btn{
margin-top:25px;
padding:12px 25px;
border-radius:30px;
background:#3b82f6;
color:white;
text-decoration:none;
}

/* SECTIONS */
.section{padding:100px 40px}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:30px}
.card{background:linear-gradient(145deg,#0f172a,#020617);border-radius:20px;padding:30px}

/* MODAL */
.modal{
display:none;
position:fixed;
top:0;left:0;
width:100%;height:100%;
background:rgba(0,0,0,.7);
justify-content:center;
align-items:center;
}

.modal-content{
background:#111827;
padding:30px;
border-radius:15px;
width:320px;
position:relative;
}

.modal input{
width:100%;
padding:10px;
border-radius:8px;
border:none;
margin-bottom:10px;
}

.close{
position:absolute;
top:10px;
right:14px;
cursor:pointer;
color:#cbd5e1;
}

#errors-page{display:none;padding-top:120px}
.search-box{text-align:center;margin-bottom:30px}
.search-box input{padding:12px 20px;border-radius:30px;border:none;width:300px}

footer{padding:40px;text-align:center;color:#64748b}
/* BURGER */
.burger{
display:none;
font-size:26px;
cursor:pointer;
color:white;
}

/* MOBILE MENU */
@media (max-width: 900px){

.menu{
position:fixed;
top:0;
right:-100%;
width:80%;
height:100vh;
background:#0b0f19;
flex-direction:column;
padding:80px 20px;
transition:.3s;
z-index:9999;
}

.menu.active{
right:0;
}

.menu li{
width:100%;
}

.menu > li > a{
display:block;
padding:14px;
border-bottom:1px solid rgba(255,255,255,0.08);
}

/* mega menu превращаем в обычный блок */
.mega{
position:static;
transform:none;
opacity:1;
visibility:visible;
width:100%;
background:transparent;
border:none;
box-shadow:none;
padding:10px 0;
}

.mega-grid{
grid-template-columns:1fr;
}

.auth-buttons{
display:none;
}

.burger{
display:block;
}
}
@media (max-width: 900px){

/* отключаем hover поведение */
.menu li:hover .mega{
opacity:1;
visibility:visible;
transform:none;
}

/* mega menu становится частью списка */
.mega{
position:relative;
width:100%;
max-height:0;
overflow:hidden;
opacity:1;
visibility:visible;
padding:0;
transition:max-height .3s ease;
border:none;
background:transparent;
}

/* активное раскрытие */
.menu li.active .mega{
max-height:500px;
padding:10px 0;
overflow-y:auto;
}

/* чтобы не вылезало вниз */
.mega-grid{
grid-template-columns:1fr;
gap:10px;
}
}