/* Light mode (default) styles */
.ctf-container {
    max-width: 1400px;
    margin: 40px auto;
    padding: 2.5rem 3rem;
    background-color: #fff;
    border-radius: 12px;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.05);
    transition: background-color 0.3s ease, color 0.3s ease;
}

.ctf-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 40px;
}

.page-heading {
    font-size: 2.6rem;
    color: #222;
    margin: 0;
}

.leaderboard-link {
    padding: 12px 22px;
    background-color: royalblue;
    color: gold;
    text-decoration: none;
    border-radius: 6px;
    border: 2px solid #CD7F32;
    font-weight: bold;
    white-space: nowrap;
    transition: background-color 0.2s ease, color 0.2s ease;
}

.leaderboard-link:hover {
    background-color: #f6cd02;
    color: #fff;
}

.ctf-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2.5rem;
}

.ctf-card {
    background-color: #f9f9f9;
    border: 2px solid #ddd;
    border-radius: 16px;
    padding: 1.5rem 2rem;
    box-shadow: 0 6px 18px rgba(0, 0, 0, 0.12);
    transition: transform 0.3s ease, box-shadow 0.3s ease, background-color 0.3s ease, color 0.3s ease;
    display: flex;
    flex-direction: column;
    height: auto;
    word-wrap: break-word;
    overflow-wrap: break-word;
    min-height: 160px;
}

.ctf-card:hover {
    transform: translateY(-7px);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.2);
}

.ctf-card h3 {
    font-size: 1.3rem;
    margin: 0 0 0.8rem;
    color: #222;
    text-align: left;
}

/* .ctf-card p {
    font-size: 0.95rem;
    color: #333;
    margin: 0;
    text-align: left;
} */

.ctf-card .btn {
    margin-top: auto;
    align-self: flex-end;
    background-color: #4CAF50;
    color: white;
    padding: 0.5rem 1.3rem;
    border-radius: 10px;
    text-decoration: none;
    font-weight: 500;
    transition: background-color 0.25s ease;
}

.ctf-card .btn:hover {
    background-color: #45a049;
}

/* Responsive design */
@media (max-width: 992px) {
    .ctf-grid {
        grid-template-columns: 1fr;
    }

    .ctf-header {
        flex-direction: column;
        align-items: center;
        gap: 20px;
        margin-bottom: 30px;
    }
}

/* Dark mode overrides when body has class 'dark-mode' */
body.dark-mode .ctf-container {
    background-color: #1e1e1e;
    color: #f0f0f0;
}

body.dark-mode .page-heading {
    color: #f0f0f0;
}

body.dark-mode .ctf-card {
    background-color: #2a2a2a;
    border-color: #444;
    color: #f0f0f0;
    box-shadow: 0 6px 18px rgba(255, 255, 255, 0.05);
}

body.dark-mode .ctf-card h3 {
    color: #fff;
}

body.dark-mode .ctf-card p {
    color: #ccc;
}

body.dark-mode .leaderboard-link {
    background-color: #444;
    color: gold;
    border-color: #CD7F32;
}

body.dark-mode .leaderboard-link:hover {
    background-color: #f6cd02;
    color: #000;
}

body.dark-mode .ctf-card .btn {
    background-color: #3aaf4f;
    color: #fff;
}

body.dark-mode .ctf-card .btn:hover {
    background-color: #2a9240;
}