body {
    background: #181731;
    color: #fff;
    font-family: 'Segoe UI', Arial, sans-serif;
    margin: 0;
    padding: 0;
}
header, nav {
    background: #232047;
    padding: 1em;
    text-align: center;
}
nav a {
    color: #ffd857;
    text-decoration: none;
    font-weight: bold;
    margin: 0 16px;
    transition: color 0.3s;
}
nav a:hover { color: #fff38b; }
.card {
    background: #232047;
    border-radius: 16px;
    box-shadow: 0 6px 40px #0009;
    padding: 2em;
    margin: 2em auto;
    max-width: 460px;
}
input, button {
    padding: 12px 16px;
    border-radius: 8px;
    border: none;
    margin: 10px 0;
    font-size: 1em;
    width: 100%;
    background: #222;
    color: #fff;
}
button, .btn {
    background: linear-gradient(90deg, #ffd857 40%, #38f0ff 100%);
    color: #2a2552;
    font-weight: bold;
    cursor: pointer;
    transition: box-shadow 0.2s;
    border: none;
    width: auto;
}
button:hover, .btn:hover {
    box-shadow: 0 0 20px #ffd85777;
}
label {
    display: block;
    margin-bottom: 0.2em;
    color: #ffd857;
}
.error { color: #ff5a5a; margin:1em 0;}
.success { color: #2fd454; margin:1em 0;}
/* Ostale klase ćemo proširiti uz sledeće stranice */