/* CSS Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #3498db;
    --secondary-color: #2ecc71;
    --background-color: #f8f9fa;
    --surface-color: #ffffff;
    --text-color: #333333;
    --text-secondary: #666666;
    --border-color: #e0e0e0;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
    transition: var(--transition);
}

.container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    max-width: 100%;
}

/* Header Styles */
header {
    background-color: var(--surface-color);
    box-shadow: var(--shadow);
    padding: 1rem 1.5rem;
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo i {
    font-size: 1.75rem;
    color: var(--primary-color);
}

.logo h1 {
    font-size: 1.5rem;
    font-weight: 600;
}

.header-controls {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.theme-toggle {
    background: transparent;
    border: none;
    cursor: pointer;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    transition: var(--transition);
}

.theme-toggle:hover {
    background-color: rgba(0, 0, 0, 0.05);
}

.theme-toggle i {
    font-size: 1.25rem;
    position: absolute;
    transition: var(--transition);
}

.theme-toggle .fa-sun {
    opacity: 0;
    transform: translateY(20px);
}

.language-selector select {
    padding: 0.5rem;
    border-radius: 4px;
    border: 1px solid var(--border-color);
    background-color: var(--surface-color);
    color: var(--text-color);
    cursor: pointer;
}

.mobile-menu-toggle {
    display: none;
    background: transparent;
    border: none;
    font-size: 1.5rem;
    width: 40px;
    height: 40px;
    border-radius: 4px;
    cursor: pointer;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.mobile-menu-toggle:hover {
    background-color: rgba(0, 0, 0, 0.05);
}

/* Main Content Layout */
.main-content {
    display: flex;
    flex: 1;
}

/* Desktop Menu Styles */
.desktop-menu {
    width: 220px;
    background-color: var(--surface-color);
    box-shadow: var(--shadow);
    padding: 1.5rem 0;
    transition: var(--transition);
}

.desktop-menu ul {
    list-style: none;
}

.desktop-menu li {
    padding: 0.9rem 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
    transition: var(--transition);
    border-left: 3px solid transparent;
}

.desktop-menu li:hover {
    background-color: rgba(0, 0, 0, 0.03);
}

.desktop-menu li.active {
    background-color: rgba(52, 152, 219, 0.1);
    border-left: 3px solid var(--primary-color);
    color: var(--primary-color);
}

.desktop-menu i {
    font-size: 1.1rem;
    width: 20px;
}

/* Mobile Menu Styles */
.mobile-menu {
    position: fixed;
    top: 0;
    left: 0;
    width: 280px;
    height: 100vh;
    background-color: var(--surface-color);
    box-shadow: 2px 0 10px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    transform: translateX(-100%);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.mobile-menu.active {
    transform: translateX(0);
}

.mobile-menu-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.mobile-menu-close {
    background: transparent;
    border: none;
    font-size: 1.5rem;
    width: 40px;
    height: 40px;
    border-radius: 4px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.mobile-menu-close:hover {
    background-color: rgba(0, 0, 0, 0.05);
}

.mobile-menu ul {
    list-style: none;
    padding: 1rem 0;
    flex: 1;
}

.mobile-menu li {
    padding: 1rem 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
    transition: var(--transition);
}

.mobile-menu li:hover {
    background-color: rgba(0, 0, 0, 0.03);
}

.mobile-menu li.active {
    background-color: rgba(52, 152, 219, 0.1);
    color: var(--primary-color);
}

.mobile-menu i {
    font-size: 1.2rem;
    width: 24px;
}

/* Main Content Area */
main {
    flex: 1;
    padding: 2rem;
    overflow-y: auto;
}

.page-header {
    margin-bottom: 2rem;
}

.page-header h2 {
    font-size: 1.8rem;
    margin-bottom: 0.5rem;
}

.page-header p {
    color: var(--text-secondary);
}

.content-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2.5rem;
}

.card {
    background-color: var(--surface-color);
    border-radius: 8px;
    padding: 1.5rem;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.card-icon {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: rgba(52, 152, 219, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
}

.card-icon i {
    font-size: 1.5rem;
    color: var(--primary-color);
}

.card h3 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
}

.card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.content-section {
    background-color: var(--surface-color);
    border-radius: 8px;
    padding: 1.5rem;
    box-shadow: var(--shadow);
    margin-bottom: 2rem;
    border: 1px solid var(--border-color);
}

.content-section h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
}

.activity-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.activity-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 1rem;
    border-radius: 6px;
    transition: var(--transition);
}

.activity-item:hover {
    background-color: rgba(0, 0, 0, 0.02);
}

.activity-icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: rgba(46, 204, 113, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.activity-icon i {
    color: var(--secondary-color);
}

.activity-content {
    flex: 1;
}

.activity-time {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-top: 0.25rem;
    display: block;
}

.footer-note {
    text-align: center;
    padding: 1.5rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
    border-top: 1px solid var(--border-color);
    margin-top: 2rem;
}

/* Media Queries for Responsive Design */
@media (max-width: 992px) {
    .desktop-menu {
        width: 200px;
    }
    
    .content-grid {
        grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    }
}

@media (max-width: 768px) {
    .desktop-menu {
        display: none;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    main {
        padding: 1.5rem;
    }
    
    .content-grid {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    }
}

@media (max-width: 576px) {
    .header-content {
        flex-wrap: wrap;
    }
    
    .logo h1 {
        font-size: 1.25rem;
    }
    
    .content-grid {
        grid-template-columns: 1fr;
    }
    
    main {
        padding: 1rem;
    }
    
    .page-header h2 {
        font-size: 1.5rem;
    }
}