/* =========================
   GLOBAL
========================= */

body {

    margin:0;
    padding:0;

    font-family: system-ui, Arial, sans-serif;

    background:
    linear-gradient(
    135deg,
    #0b1220,
    #1e1b4b,
    #0f172a
    );

    color:#e5e7eb;

    line-height:1.6;

}


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

.navbar {

    display:flex;
    justify-content:center;
    align-items:center;

    background:rgba(15,23,42,.85);

    backdrop-filter: blur(10px);

    padding:14px;

    position:sticky;
    top:0;

    z-index:1000;

    border-bottom:1px solid rgba(255,255,255,.08);

}


.navbar a,
.dropbtn {

    color:#e5e7eb;

    text-decoration:none;

    padding:14px 18px;

    font-size:15px;

    border:none;

    background:none;

    cursor:pointer;

    transition:0.2s;

}


.navbar a:hover,
.dropdown:hover .dropbtn {

    color:#60a5fa;

}


/* =========================
   DROPDOWN
========================= */

.dropdown {

    position:relative;

}


.dropdown-content {

    display:none;

    position:absolute;

    background:#111827;

    min-width:180px;

    border:1px solid rgba(255,255,255,.08);

    border-radius:8px;

    overflow:hidden;

}


.dropdown-content a {

    display:block;

    padding:10px 12px;

    color:#e5e7eb;

}


.dropdown-content a:hover {

    background:#1f2937;

}


.dropdown:hover .dropdown-content {

    display:block;

}


/* =========================
   PAGE HEADER
========================= */

.page-header {

    text-align:center;

    padding:40px 20px;

}


.icon {

    width:40px;

    margin-bottom:10px;

}

.logo-container {
    text-align: center;
    margin-top: 20px;
}
.tux-logo {
    width: 100px !important;
    height: auto !important;
    filter: drop-shadow(0 0 6px rgba(96,165,250,0.6));
}

/* =========================
   TEXT
========================= */

h1 {

    margin:10px 0;

    font-size:36px;

}


h2 {

    margin:20px 0 10px 0;

    font-size:22px;

    border-bottom:1px solid rgba(255,255,255,.1);

    padding-bottom:6px;

}


.note {

    color:#9ca3af;

}




/* =========================
   CARDS
========================= */

.card {

    width:80%;

    max-width:900px;

    margin:20px auto;

    padding:20px;

    background:rgba(255,255,255,.04);

    border:1px solid rgba(255,255,255,.08);

    border-radius:12px;

}







/* =========================
   LISTS
========================= */

ul {

    padding-left:20px;

}

li {

    margin-bottom:8px;

}


/* =========================
   BACK TO TOP
========================= */

.top-button {

    text-align:center;

    margin:40px 0;

}

.top-button a {

    display:inline-block;

    padding:10px 16px;

    background:#1f2937;

    color:#e5e7eb;

    text-decoration:none;

    border-radius:8px;

    border:1px solid rgba(255,255,255,.1);

}

.top-button a:hover {

    background:#2563eb;

}