/* Base Styles */
:root {
    --primary-color: #3498db;
    --secondary-color: #2ecc71;
    --background-color: #1a1a2e;
    --text-color: #ffffff;
    --accent-color: #2ecc71;
    --danger-color: #e74c3c;
    --card-bg: rgba(255, 255, 255, 0.1);
    --nav-height: 60px;
    --border-color: rgba(255, 255, 255, 0.2);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background: var(--background-color);
    margin: 0;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Navigation Bar */
.nav-bar {
    background-color: rgba(0, 0, 0, 0.2);
    padding: 1rem 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
}

.nav-bar .logo {
    display: flex;
    align-items: center;
    text-decoration: none;
    color: var(--text-color);
    font-size: 1.5rem;
    font-weight: bold;
}

.nav-bar .logo img {
    height: 32px;
    margin-right: 0.5rem;
}

.nav-links {
    display: flex;
    gap: 1.5rem;
    align-items: center;
}

.nav-links a {
    color: var(--text-color);
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    transition: all 0.3s ease;
}

.nav-links a:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

.nav-links a.active {
    background-color: var(--primary-color);
    color: white;
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-color);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.5rem;
}

/* Main Content */
main {
    padding: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.overlay {
    background-color: rgba(0, 0, 0, 0.3);
    padding: 2rem;
    border-radius: 8px;
    backdrop-filter: blur(5px);
}

/* Card Styles */
.dashboard-card {
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: 8px;
    backdrop-filter: blur(10px);
    margin-bottom: 1rem;
}

.dashboard-card h3 {
    color: var(--accent-color);
    margin-top: 0;
    margin-bottom: 1rem;
}

/* Button Styles */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 500;
    text-decoration: none;
    border: none;
}

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

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

.btn-secondary {
    background-color: rgba(255, 255, 255, 0.1);
    color: white;
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background-color: rgba(255, 255, 255, 0.2);
}

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

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

.btn-back {
    background-color: transparent;
    color: var(--text-color);
    padding: 0;
}

.btn-back:hover {
    color: var(--primary-color);
}

/* Grid Layout */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1rem;
    margin-top: 1rem;
}

/* List Styles */
.list-unstyled {
    list-style: none;
    padding: 0;
    margin: 0;
}

.list-item {
    padding: 0.5rem;
    margin-bottom: 0.5rem;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 4px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.list-item:hover {
    background: rgba(255, 255, 255, 0.1);
}

/* Form Styles */
.form-group {
    margin-bottom: 1rem;
}

.form-control {
    width: 100%;
    padding: 0.5rem;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 4px;
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-color);
}

.form-control:focus {
    outline: none;
    border-color: var(--accent-color);
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    z-index: 1000;
    justify-content: center;
    align-items: center;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--background-color);
    padding: 2rem;
    border-radius: 8px;
    max-width: 600px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
}

/* Footer */
footer {
    text-align: center;
    padding: 2rem;
    color: rgba(255, 255, 255, 0.7);
    border-top: 1px solid var(--border-color);
}

/* Loading and Error States */
.loading {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    color: rgba(255, 255, 255, 0.7);
}

.error {
    background-color: rgba(231, 76, 60, 0.1);
    border: 1px solid var(--danger-color);
    color: var(--danger-color);
    padding: 1rem;
    border-radius: 4px;
    margin: 1rem 0;
}

/* Utility Classes */
.text-center { text-align: center; }
.mt-1 { margin-top: 1rem; }
.mt-2 { margin-top: 2rem; }
.mb-1 { margin-bottom: 1rem; }
.mb-2 { margin-bottom: 2rem; }

/* Responsive Design */
@media (max-width: 768px) {
    .nav-bar {
        padding: 1rem;
    }

    .menu-toggle {
        display: block;
    }

    .nav-links {
        display: none;
        position: fixed;
        top: 64px;
        left: 0;
        right: 0;
        background-color: var(--background-color);
        flex-direction: column;
        padding: 1rem;
        gap: 0.5rem;
        border-bottom: 1px solid var(--border-color);
    }

    .nav-links.active {
        display: flex;
    }

    .nav-links a {
        width: 100%;
        padding: 0.75rem 1rem;
    }

    main {
        padding: 1rem;
    }

    .overlay {
        padding: 1rem;
    }

    .dashboard-grid {
        grid-template-columns: 1fr;
    }
    
    .modal-content {
        width: 95%;
        padding: 1rem;
    }
}