:root {
    --primary: #4a90e2;
    --secondary: #f39c12;
    --success: #2ecc71;
    --danger: #e74c3c;
    --light: #ecf0f1;
    --dark: #2c3e50;
    --white: #ffffff;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    background-color: var(--light);
    color: var(--dark);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

header {
    background-color: var(--primary);
    color: var(--white);
    padding: 1rem 0;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    flex-wrap: wrap;
}

nav .logo {
    font-size: 1.5rem;
    font-weight: bold;
}

nav ul {
    list-style: none;
    display: flex;
    gap: 20px;
    margin: 0;
    padding: 0;
}

.flex-responsive {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

#options-container, #o-cont {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
    margin-top: 20px;
}

#media-container img, #media-container video, #m-cont img, #m-cont video {
    max-width: 100%;
    height: auto;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .flex-responsive {
        flex-direction: column;
        align-items: stretch;
        gap: 10px;
    }

    #options-container, #o-cont {
        grid-template-columns: 1fr !important;
    }
    nav {
        flex-direction: column;
        gap: 15px;
        text-align: center;
    }

    nav ul {
        flex-direction: column;
        gap: 10px;
        width: 100%;
    }

    nav ul li {
        width: 100%;
        border-bottom: 1px solid rgba(255,255,255,0.1);
        padding-bottom: 5px;
    }

    .home-actions {
        flex-direction: column;
        width: 100%;
    }

    .home-actions .btn {
        width: 100%;
        box-sizing: border-box;
    }

    table {
        display: block;
        overflow-x: auto;
    }

    .card {
        padding: 15px;
    }

    main {
        padding: 10px;
    }
}

nav ul li a {
    color: var(--white);
    text-decoration: none;
    font-weight: 500;
}

main {
    flex: 1;
    max-width: 1200px;
    margin: 20px auto;
    padding: 20px;
    width: 100%;
    box-sizing: border-box;
}

footer {
    background-color: var(--dark);
    color: var(--white);
    text-align: center;
    padding: 1rem 0;
    margin-top: auto;
}

.flash {
    padding: 15px;
    margin-bottom: 20px;
    border-radius: 5px;
}

.flash.success { background-color: var(--success); color: white; }
.flash.danger { background-color: var(--danger); color: white; }

.btn {
    display: inline-block;
    padding: 10px 20px;
    border-radius: 5px;
    text-decoration: none;
    cursor: pointer;
    border: none;
    font-weight: bold;
    transition: opacity 0.3s;
}

.btn-primary { background-color: var(--primary); color: white; }
.btn-secondary { background-color: var(--secondary); color: white; }
.btn-success { background-color: var(--success); color: white; }
.btn-danger { background-color: var(--danger); color: white; }

.card {
    background: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    margin-bottom: 20px;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
}

th, td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid #ddd;
}

th { background-color: #f8f9fa; }

form div {
    margin-bottom: 15px;
}

input[type="text"], input[type="password"], input[type="date"], select, textarea {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    box-sizing: border-box;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
}