body{
    font-family: 'Courier New', Courier, monospace;
}







* {
    box-sizing: border-box;
}

body {
    --bg: #071018;
    --surface: #0d1b26;
    --text: #d9edf2;
    --muted: #6c8994;
    --accent: #38c6c8;
    --accent-soft: rgba(56, 198, 200, 0.25);
    --danger: #ef6475;
    --border: #23414b;

    margin: 0;
    min-height: 100vh;
    padding: 2rem;

    background: var(--bg);
    color: var(--text);

    font-family: "Courier New", Courier, monospace;
    line-height: 1.6;
}


/* Navigation */

nav {
    display: flex;
    align-items: center;
    gap: 1.5rem;

    padding: 1rem 1.5rem;
    margin-bottom: 3rem;

    background: var(--surface);
    border: 1px solid var(--border);
}

nav a,
nav button {
    position: relative;

    color: var(--accent);
    font-family: inherit;
    font-size: 1rem;
    text-decoration: none;
}

nav a {
    padding: 0.25rem 0.5rem;
}

nav a:focus,
nav button:focus,
#ChallengesLink:focus {
    outline: none;
    color: white;
    text-shadow: 0 0 8px var(--accent);
}

nav a:focus::before,
nav button:focus::before,
#ChallengesLink:focus::before {
    content: ">";
    position: absolute;
    left: -1rem;
    color: var(--accent);
}

nav button {
    margin-left: auto;

    padding: 0.4rem 1.2rem;

    background: transparent;
    border: 1px solid var(--accent);

    cursor: pointer;
}

nav button:hover,
nav button:focus {
    background: var(--accent);
    color: var(--bg);
    text-shadow: none;
}

nav #UserMenu {
    position: relative;
    margin-left: auto;
}

nav #Username {
    display: inline-flex;
    align-items: center;
    max-width: 22ch;
    margin-left: 0;
    padding: 0.35rem 0.75rem;
    overflow: hidden;
    border: 1px solid var(--border);
    background: rgba(56, 198, 200, 0.08);
    color: var(--text);
    font-size: 0.9rem;
    letter-spacing: 0.04em;
    text-overflow: ellipsis;
    white-space: nowrap;
}

nav #Username::after {
    content: " v";
    margin-left: 0.65rem;
    color: var(--muted);
}

nav #UserMenu:focus-within::before {
    content: ">";
    position: absolute;
    left: -1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--accent);
}

nav #Username:focus {
    outline: 2px solid var(--accent);
    outline-offset: 3px;
    background: var(--accent);
    color: var(--bg);
    text-shadow: none;
}

nav #UserDropdown {
    position: absolute;
    top: calc(100% + 0.5rem);
    right: 0;
    z-index: 10;
    min-width: 100%;
    padding: 0.35rem;
    background: var(--surface);
    border: 1px solid var(--border);
    box-shadow: 0 0.75rem 1.5rem rgba(0, 0, 0, 0.3);
}

nav #UserDropdown #Logout {
    display: block;
    width: 100%;
    margin: 0;
    border: 0;
    text-align: left;
}


/* Heading */

h1 {
    text-align: center;

    font-size: 1.8rem;
    font-weight: normal;
    letter-spacing: 0.1em;

    color: var(--text);
}
h2 {
    text-align: center;

    font-size: 1.5rem;
    font-weight: normal;
    letter-spacing: 0.1em;

    color: var(--accent);
}
#LeaderboardContainer {
    max-width: 72rem;
    margin: 0 auto 1.5rem;
    text-align: center;
}

#LeaderboardContainer h1 {
    margin-top: 0;
    text-transform: uppercase;
}

#LeaderboardContainer label {
    display: inline-block;
    margin-right: 0.75rem;
    color: var(--muted);
}

#leaderboard-select {
    padding: 0.55rem 0.8rem;
    border: 1px solid var(--accent);
    background: var(--surface);
    color: var(--text);
    font: inherit;
}

#leaderboard-select:focus {
    outline: 2px solid var(--accent);
    outline-offset: 3px;
}

#leaderboard-status {
    min-height: 1.6em;
    margin: 0 auto 1rem;
    max-width: 72rem;
    color: var(--muted);
    text-align: center;
}

.leaderboard-table {
    width: 100%;
    max-width: 72rem;
    margin: 0 auto;
    width: 100%;
    border: 1px solid var(--border);
    border-spacing: 0;
    background: var(--surface);
    text-align: left;
}

.leaderboard-table th,
.leaderboard-table td {
    padding: 1rem 1.25rem;
}

.leaderboard-table th {
    color: var(--accent);
    font-weight: normal;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.leaderboard-table td {
    border-top: 1px solid var(--border);
    color: var(--text);
}

.leaderboard-table th:first-child,
.leaderboard-table td:first-child {
    width: 5rem;
    text-align: center;
}

.leaderboard-table th:last-child,
.leaderboard-table td:last-child {
    width: 3rem;
    text-align: right;
}

.leaderboard-table tbody tr {
    transition: background-color 120ms ease, color 120ms ease;
}

.leaderboard-table tbody tr:hover,
.leaderboard-table tbody tr:focus-within {
    background: var(--accent-soft);
}

.leaderboard-table tbody tr:hover td:last-child,
.leaderboard-table tbody tr:focus-within td:last-child {
    color: var(--accent);
}

@media (max-width: 700px) {
    body {
        padding: 1rem;
    }

    nav {
        flex-wrap: wrap;
        gap: 0.75rem 1rem;
        margin-bottom: 2rem;
    }

    nav button {
        margin-left: 0;
    }

    nav #UserMenu {
        margin-left: 0;
    }

    #LeaderboardContainer {
        margin-bottom: 1.5rem;
    }

    #LeaderboardContainer label {
        display: block;
        margin: 0 0 0.5rem;
    }

    #leaderboard-select {
        max-width: 100%;
    }

    .leaderboard-table {
        min-width: 36rem;
    }

    body {
        overflow-x: auto;
    }
}














/* Subtle Interface Texture */

body::after {
    content: "";

    position: fixed;
    inset: 0;

    pointer-events: none;

    background: linear-gradient(
        rgba(56, 198, 200, 0.03) 1px,
        transparent 1px
    );

    background-size: 100% 4px;

    opacity: 0.15;
}