:root{
    --bg:#0F172A;
    --bg2:#0A0A0F;
    --white:#F1F5F9;
    --blue:#1DA1F2;
    --card: rgba(255,255,255,.06);
    --border: rgba(255,255,255,.12);
}

*{
    box-sizing: border-box;
}

body{
    margin:0;
    font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
    background: radial-gradient(1200px 600px at 20% 0%, #14223f 0%, var(--bg2) 55%, #05060a 100%);
    color:var(--white);
}

/* Layout */
.wrap{
    max-width:1100px;
    margin:0 auto;
    padding:18px;
}

header{
    position:sticky;
    top:0;
    backdrop-filter: blur(10px);
    background: rgba(10,10,15,.55);
    border-bottom:1px solid var(--border);
    z-index:10;
}

.topbar{
    display:flex;
    align-items:center;
    gap:18px;
}

.brand{
    display:flex;
    align-items:center;
    gap:12px;
    text-decoration:none;
    color:var(--white);
}

.brand img{
    height:42px;
    width:auto;
    display:block;
}

/* MENU */
nav{
    margin-left:auto;
    display:flex;
    align-items:center;
    gap:10px;
}

nav a{
    color:var(--white);
    text-decoration:none;
    padding:10px 14px;
    border-radius:12px;
    transition: .2s ease;
}

nav a:hover{
    background: rgba(255,255,255,.06);
}

nav a.active{
    background: rgba(29,161,242,.18);
    outline:1px solid rgba(29,161,242,.30);
}

/* BUTTON */
.btn{
    display:inline-flex;
    align-items:center;
    gap:8px;
    padding:10px 16px;
    border-radius:12px;
    text-decoration:none;
    color:var(--white);
    background: rgba(29,161,242,.18);
    border:1px solid rgba(29,161,242,.35);
    transition:.2s ease;
}

.btn:hover{
    background: rgba(29,161,242,.30);
}

/* MAIN */
main{
    padding:28px 0 40px;
}

.card{
    background: var(--card);
    border:1px solid var(--border);
    border-radius:16px;
    padding:20px;
}

h1{
    margin:0 0 12px;
    font-size:30px;
}

p{
    line-height:1.6;
    opacity:.92;
}

.grid{
    display:grid;
    grid-template-columns: 1.2fr .8fr;
    gap:18px;
}

@media (max-width: 820px){
    .grid{
        grid-template-columns: 1fr;
    }
    nav{
        flex-wrap:wrap;
    }
}

/* FORM */
input{
    width:100%;
    padding:10px;
    border-radius:10px;
    border:1px solid rgba(255,255,255,.2);
    background:rgba(0,0,0,.25);
    color:var(--white);
}

input:focus{
    outline:none;
    border-color: var(--blue);
}