:root {
    --background-color: #121212;
    --card-background: #1e1e1e;
    --text-color: #e0e0e0;
    --primary-color: #03dac6; /* Teal accent */
    --secondary-color: #bb86fc; /* Purple accent */
    --border-color: #333333;
    --rank1-color: #ffd700; /* Gold */
    --rank2-color: #c0c0c0; /* Silver */
    --rank3-color: #cd7f32; /* Bronze */
    --hover-background: #2a2a2a;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    margin: 0;
    padding: 20px;
    line-height: 1.6;
}

.container {
    max-width: 1000px;
    margin: 20px auto;
    background-color: var(--card-background);
    border-radius: 12px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
    overflow: hidden; /* Ensures footer stays inside rounded corners */
}

header {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: #000; /* Dark text on light gradient */
    padding: 25px 30px;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
}

header h1 {
    margin: 0 0 10px 0;
    font-size: 2.2rem;
    font-weight: 700;
}

header p {
    margin: 0;
    font-size: 1rem;
    opacity: 0.9;
}

#last-updated {
    font-size: 0.8rem;
    color: #333;
    margin-top: 8px;
}

.leaderboard-header,
.leaderboard-row {
    display: grid;
    grid-template-columns: 60px 1fr 100px 170px 100px; /* Rank, User, Score, Time, Code */
    align-items: center;
    padding: 12px 30px;
    border-bottom: 1px solid var(--border-color);
    gap: 15px;
    font-size: 0.95rem;
}

.leaderboard-header {
    font-weight: 600;
    background-color: rgba(255, 255, 255, 0.05); /* Slightly lighter header */
    position: sticky; /* Make header sticky if leaderboard scrolls */
    top: 0;
    z-index: 10;
}

.leaderboard-row {
    transition: background-color 0.2s ease-in-out, transform 0.2s ease;
}

.leaderboard-row:hover {
    background-color: var(--hover-background);
    transform: scale(1.01); /* Subtle zoom effect */
    cursor: default;
}

.leaderboard-row:last-child {
    border-bottom: none;
}

.rank {
    font-weight: 700;
    text-align: center;
    font-size: 1.1em;
    min-width: 40px; /* Ensure rank number doesn't wrap */
}

.username {
    font-weight: 600;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.score {
    text-align: right;
    font-weight: 600;
    color: var(--primary-color);
}

.timestamp {
    font-size: 0.85em;
    color: #aaa;
    text-align: right;
}

.code-action {
    text-align: center;
}

.view-code-btn {
    background-color: var(--secondary-color);
    color: var(--background-color);
    border: none;
    padding: 5px 12px;
    border-radius: 5px;
    cursor: pointer;
    font-size: 0.8rem;
    font-weight: 600;
    transition: background-color 0.2s ease;
    text-align: center;
}

.view-code-btn:hover {
    background-color: #a06ef8; /* Slightly lighter purple */
}

/* Special ranks */
.leaderboard-row[data-rank="1"] .rank { color: var(--rank1-color); }
.leaderboard-row[data-rank="2"] .rank { color: var(--rank2-color); }
.leaderboard-row[data-rank="3"] .rank { color: var(--rank3-color); }

.leaderboard-row[data-rank="1"] { border-left: 4px solid var(--rank1-color); padding-left: 26px; }
.leaderboard-row[data-rank="2"] { border-left: 4px solid var(--rank2-color); padding-left: 26px; }
.leaderboard-row[data-rank="3"] { border-left: 4px solid var(--rank3-color); padding-left: 26px; }


#loading-indicator {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 50px;
    font-size: 1.1rem;
    color: #aaa;
    gap: 10px;
}

.spinner {
    border: 4px solid rgba(255, 255, 255, 0.1);
    border-left-color: var(--primary-color);
    border-radius: 50%;
    width: 24px;
    height: 24px;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

footer {
    text-align: center;
    padding: 15px;
    font-size: 0.9rem;
    color: #888;
    border-top: 1px solid var(--border-color);
    background-color: rgba(0, 0, 0, 0.1);
}

/* Modal Styles */
.modal {
    display: none; /* Hidden by default */
    position: fixed; /* Stay in place */
    z-index: 100; /* Sit on top */
    left: 0;
    top: 0;
    width: 100%; /* Full width */
    height: 100%; /* Full height */
    overflow: auto; /* Enable scroll if needed */
    background-color: rgba(0, 0, 0, 0.7); /* Black w/ opacity */
    padding-top: 60px; /* Location of the box */
}

.modal-content {
    background-color: var(--card-background);
    margin: 5% auto; /* 5% from the top and centered */
    padding: 25px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    width: 80%; /* Could be more or less, depending on screen size */
    max-width: 900px;
    position: relative;
    box-shadow: 0 5px 15px rgba(0,0,0,0.5);
}

.close-button {
    color: #aaa;
    position: absolute;
    top: 10px;
    right: 20px;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
}

.close-button:hover,
.close-button:focus {
    color: #fff;
    text-decoration: none;
}

#modal-username {
    margin-top: 0;
    margin-bottom: 20px;
    color: var(--primary-color);
}

#modal-code {
    background-color: #282c34; /* Match highlight.js theme background */
    color: #abb2bf;
    padding: 15px;
    border-radius: 5px;
    max-height: 60vh; /* Limit height and allow scroll */
    overflow: auto;
    display: block; /* Needed for <pre> */
    white-space: pre-wrap; /* Wrap long lines */
    word-break: break-all; /* Break words if needed */
}

/* Responsive adjustments (optional) */
@media (max-width: 768px) {
    .leaderboard-header,
    .leaderboard-row {
        grid-template-columns: 40px 1fr 80px 80px; /* Adjust for smaller screens, hide timestamp maybe */
        padding: 10px 15px;
        gap: 10px;
        font-size: 0.9rem;
    }
    .timestamp {
        /* Hide timestamp column on small screens */
        display: none;
    }
    .leaderboard-header .timestamp {
        display: none;
    }
     .code-action {
         /* Adjust button text or just show icon if needed */
         grid-column: 4 / 5; /* Span correctly if timestamp is hidden */
    }
    .view-code-btn {
        padding: 4px 8px;
        font-size: 0.75rem;
    }
    header h1 {
        font-size: 1.8rem;
    }
    .modal-content {
        width: 95%;
    }
}