/* ================= BRAND ================= */

:root {
    --primary:#635BFF;
    --primary-dark:#4F46E5;
    --text-dark:#111827;
    --border:#E5E7EB;
}

/* ================= BASE ================= */

*{
    margin:0;
    padding:0;
    box-sizing:border-box;
}

html,body{
    overflow-x:hidden;
}

body{
    font-family:'Inter',sans-serif;
    background:#ffffff;
    color:var(--text-dark);
    padding-top:90px; /* IMPORTANT: space for fixed navbar */
}

/* ================= NAVBAR ================= */

.navbar{
    position:fixed; /* FIXED not sticky */
    top:0;
    left:0;
    width:100%;
    z-index:99999;
    display:flex;
    justify-content:space-between;
    align-items:center;
    padding:22px 60px;
    border-bottom:1px solid var(--border);
    background:rgba(255,255,255,0.85);
    backdrop-filter:blur(12px);
    transition:.3s ease;
}

.navbar.scrolled{
    padding:16px 60px;
    box-shadow:0 10px 30px rgba(0,0,0,.05);
}

/* Logo */

.logo{
    font-size:24px;
    font-weight:700;
    text-decoration:none;
    color:var(--text-dark);
}

.logo span{
    color:var(--primary);
}

/* Center Links */

.nav-center{
    display:flex;
    align-items:center;
    gap:40px;
}

.nav-center a{
    text-decoration:none;
    font-size:15px;
    font-weight:600;
    color:var(--text-dark);
    position:relative;
    transition:.2s ease;
}

.nav-center a::after{
    content:"";
    position:absolute;
    bottom:-6px;
    left:0;
    width:0%;
    height:2px;
    background:var(--primary);
    transition:.3s ease;
}

.nav-center a:hover{
    color:var(--primary);
}

.nav-center a:hover::after{
    width:100%;
}

/* Right Controls */

.nav-controls{
    display:flex;
    align-items:center;
    gap:20px;
}

.btn-desktop{
    padding:11px 24px;
    background:var(--primary);
    color:#fff;
    border-radius:999px;
    font-weight:600;
    text-decoration:none;
    transition:.2s ease;
}

.btn-desktop:hover{
    background:var(--primary-dark);
    box-shadow:0 10px 25px rgba(99,91,255,.3);
}

/* Theme toggle */

.theme-toggle{
    width:38px;
    height:38px;
    border-radius:50%;
    border:1px solid var(--border);
    display:flex;
    align-items:center;
    justify-content:center;
    cursor:pointer;
}

/* Hamburger */

.hamburger{
    display:none;
    flex-direction:column;
    gap:6px;
    cursor:pointer;
}

.hamburger span{
    width:26px;
    height:2px;
    background:var(--text-dark);
}

/* Mobile Menu */

.mobile-menu{
    position:fixed;
    top:0;
    left:0;
    width:100%;
    height:100vh;
    background:#ffffff;
    display:flex;
    flex-direction:column;
    align-items:center;
    justify-content:center;
    gap:30px;
    transform:translateY(-100%);
    transition:.4s ease;
    z-index:9999;
}

.mobile-menu.active{
    transform:translateY(0);
}

.mobile-menu a{
    font-size:22px;
    font-weight:600;
    text-decoration:none;
    color:var(--text-dark);
}

.mobile-btn{
    background:var(--primary);
    color:#fff !important;
    padding:14px 30px;
    border-radius:999px;
}

/* Dark mode */

body.dark{
    background:#0F172A;
    color:#F9FAFB;
}

body.dark .navbar{
    background:rgba(15,23,42,0.95);
    border-color:#1F2937;
}

body.dark .nav-center a,
body.dark .logo{
    color:#F9FAFB;
}

body.dark .hamburger span{
    background:#F9FAFB;
}

/* Responsive */

@media(max-width:992px){

    .navbar{
        padding:20px;
    }

    .nav-center,
    .btn-desktop{
        display:none;
    }

    .hamburger{
        display:flex;
    }

}