:root {
    --bg-color: #fff;
    --text-color: black;
    --secondary-text-color: #333;
    --secondary-bg-color: #e0e0e0;
    --box-shadow-color: rgba(0, 0, 0, 0.1);
    --table-border-color: #ccc;
    --table-bg-color: #eee;
    --table-secondary-bg-color: #ccc;
    --table-hover-bg-color: hsl(0, 0%, 96%);
    --input-border-color: #bbb;
    --input-bg-color: #ccc;
    --input-text-color: #333;
    --btn-bg-color: #ccc;
    --btn-text-color: #000;
    --basic-color: #0eaf34;
    --easy-color: #43cf0c;
    --medium-color: darkorange;
    --hard-color: red;
    --expert-color: rgba(206, 3, 3, 0.654);
    --completed-color: #28a745;
    --pending-color: darkorange;
    --spinner-border-color: #f3f3f3;
    --spinner-top-border-color: #3498db;
    --locked-bg-color: #fff;
}

[data-bs-theme="dark"] {
    --bg-color: #001528;
    --text-color: #ddd;
    --secondary-text-color: #aaa;
    --secondary-bg-color: #15202c;
    --box-shadow-color: rgba(0, 0, 0, 0.1);
    --table-border-color: #15314b;
    --table-bg-color: #02131b;
    --table-secondary-bg-color: #15202c;
    --table-hover-bg-color: #15314b;
    --input-border-color: #15314b;
    --input-bg-color: #02131b;
    --input-text-color: #ddd;
    --btn-bg-color: #15314b;
    --btn-text-color: #fff;
    --basic-color: #0eaf34;
    --easy-color: #43cf0c;
    --medium-color: orange;
    --hard-color: red;
    --expert-color: rgba(206, 3, 3, 0.654);
    --completed-color: lightgreen;
    --pending-color: orange;
    --spinner-border-color: #f3f3f3;
    --spinner-top-border-color: #3498db;
    --locked-bg-color: #02131b;
}

a {
    text-decoration: none !important;
}

.leaderboard-container {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    background-color: var(--bg-color);
    color: var(--text-color);
    padding: 1rem;
/*    min-height: 100vh;*/
}

.leaderboard-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.leaderboard-title {
    font-size: 24px;
    font-weight: lighter;
    color: var(--text-color);
}

.leaderboard-left, .leaderboard-right {
    background-color: var(--secondary-bg-color);
    border-radius: 10px;
    height: 100%;
}

.leaderboard-left {
    flex: 2;
    padding: 10px;
}

.leaderboard-right {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
    padding: 5px;
    background-color: var(--locked-bg-color)
}

@media (max-width: 768px) {
    .leaderboard-left,
    .leaderboard-right {
        flex: 1 1 100%;
    }

    .leaderboard-right {
        margin-top: 1rem;
        width: 90%;
    }

    .leaderboard-title {
        font-size: 18px;
    }

    .leaderboard-table th,
    .leaderboard-table td {
        font-size: 12px;
    }
}

.ranking-dropdown {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
    float: right;
}

    .ranking-dropdown select {
        appearance: none;
        background-color: var(--input-bg-color);
        color: var(--input-text-color);
        border: 1px solid var(--input-border-color);
        border-radius: 10px;
        padding: 8px 12px;
        font-size: 14px;
        cursor: pointer;
        width: 160px;
        background-image: url("data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHZpZXdCb3g9IjAgMCAyNCAyNCIgZmlsbD0iI2RkZCIgd2lkdGg9IjI0cHgiIGhlaWdodD0iMjRweCI+PHBhdGggZD0iTTcgMTBsNSA1IDUtNXoiLz48L3N2Zz4=");
        background-repeat: no-repeat;
        background-position: calc(100% - 10px) center;
        padding-left: 10px;
    }

        .ranking-dropdown select:hover,
        .ranking-dropdown select:focus {
            background-color: var(--secondary-bg-color);
        }

.leaderboard-table {
    width: 100%;
    color: var(--text-color);
    border-radius: 10px;
    border: 2px solid var(--input-border-color);
}

    .leaderboard-table th {
        padding: 10px;
        text-align: left;
        background-color: var(--table-secondary-bg-color);
        border: 2px solid var(--input-border-color);
        color: var(--text-color);
        font-size: 14px;
        font-weight: bolder;
        cursor: default;
    }

    .leaderboard-table td {
        padding: 10px;
        text-align: left;
        font-size: 14px;
        color: var(--text-color);
        background-color: var(--table-bg-color);
        border-bottom: 1px solid var(--table-border-color);
    }

    .leaderboard-table tr:nth-child(1) td:first-child::after {
        content: "🥇";
        margin-right: 0.5rem;
    }

    .leaderboard-table tr:nth-child(2) td:first-child::after {
        content: "🥈";
        margin-right: 0.5rem;
    }

    .leaderboard-table tr:nth-child(3) td:first-child::after {
        content: "🥉";
        margin-right: 0.5rem;
    }
.user-info {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.user-avatar {
    width: 50px;
    height: 50px;
    background-color: #555;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-color);
}

.performance-chart {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-bottom: 1rem;
}

.chart {
    width: 150px;
    height: 150px;
    background-color: var(--basic-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    color: white;
}

.chart-legend {
    display: flex;
    justify-content: space-between;
    width: 100%;
    margin-top: 1rem;
    flex-wrap: wrap;
}

@media (max-width: 768px) {
    .chart-legend {
        flex-direction: row;
        justify-content: space-around;
    }
}

.legend-item {
    display: flex;
    align-items: center;
    margin-bottom: 0.5rem;
    width: calc(33.33% - 10px);
}

.legend-color {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    display: inline-block;
    margin-right: 0.5rem;
}

.basic {
    background-color: var(--basic-color);
}

.easy {
    background-color: var(--easy-color);
}

.medium {
    background-color: var(--medium-color);
}

.hard {
    background-color: var(--hard-color);
}

.expert {
    background-color: var(--expert-color);
}

.problem-categories {
    width: 100%;
}

.category {
    font-weight: bold;
    margin: 1rem 0 0.5rem;
}

.problem-list {
    list-style-type: circle;
    padding-left: 1.5rem;
}

.rankings-footer {
    padding: 10px;
    text-align: center;
    background-color: var(--secondary-bg-color);
    border-radius: 10px;
    margin-top: 10px;
}

    .rankings-footer .load-more-btn {
        background-color: var(--btn-bg-color);
        color: var(--btn-text-color);
        border: none;
        padding: 10px 20px;
        border-radius: 5px;
        font-size: 14px;
        cursor: pointer;
    }

        .rankings-footer .load-more-btn:hover {
            background-color: var(--table-border-color);
        }

.difficulty-tabs {
    display: flex;
    gap: 0.5rem;
    width: 100%;
    justify-content: center;
    flex-wrap: wrap;
}

.difficulty-tab-button {
    padding: 0.5rem 1rem;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    background-color: var(--btn-bg-color);
    color: var(--btn-text-color);
    font-size: 14px;
    flex: 1 1 auto;
    text-align: center;
}

    .difficulty-tab-button.active {
        background-color: var(--accent-color);
        border-bottom: 2px solid var(--input-text-color);
        color: #fff;
    }

.tab-content {
    width: 100%;
    margin-top: 1rem;
    text-align: left;
}

@media (max-width: 768px) {
    .tab-button {
        font-size: 12px;
        padding: 0.5rem;
    }
}

.horizontal-divider {
    width: 100%;
    height: 1px;
    background-color: #000;
}

.loader-container {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100%;
}

.spinner {
    align-self: center;
    border: 4px solid var(--spinner-border-color);
    border-top: 4px solid var(--spinner-top-border-color);
    border-radius: 50%;
    width: 25px;
    height: 25px;
    animation: spin 1s linear infinite;
}

@media (max-width: 480px) {
    .leaderboard-title {
        font-size: 16px;
    }

    .leaderboard-table th,
    .leaderboard-table td {
        font-size: 12px;
    }

    .ranking-dropdown select {
        width: 100%;
        font-size: 12px;
    }

    .difficulty-tab-button {
        font-size: 12px;
        padding: 0.5rem;
    }
}

.blurred-image {
    filter: blur(4px);
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.locked-message {
    z-index: 10;
    color: black;
}