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

body {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;

    background-image: url('https://wrong-door.neocities.org/stairs_1b.jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    background-attachment: fixed;
}

.panel {
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 0px;
    padding: 48px 56px;
    width: 100%;
    max-width: 480px;
    text-align: center;
    color: #fff;
}

.panel h1 {
    font-family: 'Helvetica Neue', Helvetica, sans-serif;
    font-size: 2rem;
    margin-bottom: 12px;
    letter-spacing: -0.5px;
}

.panel p {
    font-family: 'Helvetica Neue', Helvetica, sans-serif;
    font-size: 1rem;
    line-height: 1.6;
    opacity: 0.85;
}

.panel-right {
    position: fixed;
    top: 50px;
    right: 100px;
    bottom: 50px;
    width: 280px;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    padding: 32px 28px;
    color: #fff;
}

.panel-right h2 {
    font-family: 'Helvetica Neue', Helvetica, sans-serif;
    font-size: 1.4rem;
    margin-bottom: 12px;
    letter-spacing: -0.5px;
}

.panel-right p {
    font-family: 'Helvetica Neue', Helvetica, sans-serif;
    font-size: 0.95rem;
    line-height: 1.6;
    opacity: 0.85;
}

.nav-group {
    margin-bottom: 24px;
}

.nav-group:last-child {
    margin-bottom: 0;
}

.nav-heading {
    font-family: 'Helvetica Neue', Helvetica, sans-serif;
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    opacity: 0.6;
    margin-bottom: 8px;
    padding-left: 4px;
}

.nav-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.nav-list a {
    display: block;
    font-family: 'Helvetica Neue', Helvetica, sans-serif;
    font-size: 0.9rem;
    color: #fff;
    text-decoration: none;
    padding: 8px 14px;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.15);
    transition: background 0.2s, border-color 0.2s;
}

.nav-list a:hover {
    background: rgba(255, 255, 255, 0.25);
    border-color: rgba(255, 255, 255, 0.35);
}