* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Roboto', sans-serif;
    line-height: 1.6;
    background-color: #f4f7f6;
    color: #333;
}

body.login, body.signup {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background: linear-gradient(to right, #1d3557, #457b9d);
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

.container.login, .container.signup {
    background: #fff;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
    width: 350px;
    text-align: center;
}

.header {
    background-color: #2c3e50;
    color: white;
    padding: 20px;
    border-radius: 8px;
    margin-bottom: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.header h1 {
    margin: 0;
    font-size: 1.8rem;
}

.header a {
    color: white;
    text-decoration: none;
    transition: color 0.3s ease;
}

.header a:hover {
    color: #3498db;
}

.user-welcome {
    background-color: #ecf0f1;
    padding: 15px;
    border-radius: 8px;
    margin-bottom: 20px;
    text-align: center;
}

.navigation {
    display: flex;
    justify-content: center;
    margin-bottom: 20px;
}

.nav-list {
    display: flex;
    list-style-type: none;
    gap: 20px;
}

.nav-list li a {
    text-decoration: none;
    color: #2c3e50;
    padding: 10px 15px;
    border-radius: 6px;
    transition: all 0.3s ease;
    background-color: #ecf0f1;
    display: inline-block;
}

.nav-list li a:hover {
    background-color: #3498db;
    color: white;
    transform: translateY(-3px);
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.logout-btn {
    background-color: #e74c3c;
    color: white;
    text-decoration: none;
    padding: 10px 15px;
    border-radius: 6px;
    transition: background-color 0.3s ease;
}

.logout-btn:hover {
    background-color: #c0392b;
}

.dashboard-content {
    background-color: white;
    border-radius: 8px;
    padding: 20px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.dashboard-content h2 {
    color: #2c3e50;
    margin-bottom: 15px;
    text-align: center;
}

.quick-stats {
    display: flex;
    justify-content: space-around;
    margin-top: 20px;
}

.stat-box {
    background-color: #ecf0f1;
    padding: 15px;
    border-radius: 8px;
    text-align: center;
    width: 200px;
}

.tabs {
    display: flex;
    justify-content: space-around;
    margin-bottom: 20px;
}

.tabs button {
    background: none;
    border: none;
    padding: 10px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    color: #333;
}

.tabs button.active {
    color: #1d3557;
    border-bottom: 2px solid #1d3557;
}

.form {
    display: none;
}

.form.active {
    display: block;
}

.form input {
    width: 90%;
    padding: 10px;
    margin: 10px 0;
    border: 1px solid #ccc;
    border-radius: 5px;
}

.form button {
    width: 95%;
    padding: 10px;
    margin: 10px 0;
    background: #1d3557;
    color: #fff;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}

.form button:hover {
    background: #457b9d;
}

.form a {
    display: block;
    color: #1d3557;
    text-decoration: none;
    margin-top: 10px;
}

.filter-form {
    display: flex;
    justify-content: space-between;
    margin-bottom: 20px;
}

.filter-form select {
    padding: 10px;
    border-radius: 4px;
    border: 1px solid #ddd;
}

table {
    width: 100%;
    border-collapse: collapse;
}

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

th {
    background-color: #f2f2f2;
    font-weight: bold;
}

.action-btn {
    padding: 8px 12px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.download-btn {
    background-color: #3498db;
    color: white;
}

.download-btn:hover {
    background-color: #2980b9;
}

.delete-btn {
    background-color: #e74c3c;
    color: white;
}

.delete-btn:hover {
    background-color: #c0392b;
}

.add-resource-form {
    max-width: 600px;
    margin: 0 auto;
}

.form-group {
    margin-bottom: 15px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    color: #2c3e50;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 16px;
}

.submit-btn {
    width: 100%;
    padding: 12px;
    background-color: #3498db;
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    transition: background-color 0.3s ease;
}

.submit-btn:hover {
    background-color: #2980b9;
}

@media (max-width: 768px) {
    .header {
        flex-direction: column;
        text-align: center;
    }

    .nav-list {
        flex-direction: column;
        align-items: center;
    }

    .quick-stats {
        flex-direction: column;
        align-items: center;
        gap: 15px;
    }

    .filter-form {
        flex-direction: column;
    }

    .filter-form select {
        margin-bottom: 10px;
    }
}