html, body {
    margin: 0;
    padding: 0;
    font-family: 'Roboto', sans-serif;
    background: #0b0f1a;
    color: #e5e7eb;
    overflow-x: hidden;
}

.container {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 0 1rem;
}

header {
    text-align: center;
}

.main-title {
    font-family: 'Orbitron', sans-serif;
    font-size: clamp(1.8rem, 5vw, 3rem);
    color: #22d3ee;
    margin: 10px 0 20px;
    text-shadow: 0 0 6px rgba(34, 211, 238, 0.5);
}

nav ul {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    padding: 0;
    margin: 0;
    gap: 12px;
}

nav ul li a {
    text-decoration: none;
    color: #cbd5e1;
    font-weight: 500;
    font-size: clamp(0.9rem, 2.5vw, 1.1rem);
    padding: 10px 16px;
    border: 1px solid transparent;
    border-radius: 8px;
    transition: all 0.25s ease;
}

nav ul li a:hover {
    color: #22d3ee;
    border-color: #22d3ee;
}

#leaderboard-wrapper {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 24px;
    padding: 20px;
    width: 100%;
    max-width: 80rem;
    box-sizing: border-box;
    margin: 0 auto;
}

/* Leaderboard cards */
#leaderboard-wrapper > div {
    flex: 1 1 420px;
    max-width: 560px;
    background: #111827;
    border: 1px solid #1f2937;
    border-radius: 16px;
    padding: 20px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.25);
    box-sizing: border-box;
}

h2 {
    font-size: clamp(1.2rem, 3vw, 1.5rem);
    display: flex;
    align-items: center;
    gap: 10px;
    color: #e5e7eb;
}

ol {
    margin: 0;
    padding: 0 0 0 24px;
    color: #cbd5e1;
    word-break: break-word;
}

#status-ew, #status-mh {
    font-size: 12px;
    color: #94a3b8;
    margin-top: 10px;
}

/* Mobile optimization */
@media (max-width: 768px) {
    .container {
    padding: 0 0.5rem;
    }

    nav ul {
    flex-direction: column;
    align-items: center;
    gap: 8px;
    }

    nav ul li a {
    width: 100%;
    text-align: center;
    }

    #leaderboard-wrapper {
    padding: 10px;
    gap: 16px;
    }

    #leaderboard-wrapper > div {
    flex: 1 1 100%;
    max-width: 100%;
    }
}

@media (max-width: 480px) {
    body {
    font-size: 14px;
    }

    .main-title {
    margin-top: 15px;
    }

    nav ul li a {
    padding: 8px 12px;
    }

    h2 {
    font-size: 1.1rem;
    }
}