.container {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 220px;
    background-color: var(--card-color);
    padding: 30px 20px;
    box-shadow: 2px 0 10px rgba(0, 0, 0, 0.3);
    position: fixed;
    height: 100vh;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    box-sizing: border-box;
}

.nav-menu {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.nav-item {
    padding: 12px 16px;
    background-color: var(--input-bg-color);
    border-radius: 8px;
    transition: background-color 0.3s, transform 0.2s;
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
}

.nav-item:hover {
    background-color: var(--button-color);
    transform: translateX(5px);
    color: #fff;
}

.main-content {
    margin-left: 220px;
    padding: 40px;
    flex: 1;
}

.user-profile-link {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    margin-bottom: 15px;
    color: var(--text-color);
    font-size: 0.9rem;
    padding: 10px;
    background-color: var(--input-bg-color);
    border-radius: 8px;
    overflow: hidden;
    text-decoration: none;
    transition: background-color 0.3s, transform 0.2s;
}

.user-profile-link:hover {
    background-color: var(--button-color);
    transform: translateX(5px);
    color: #fff;
}

.user-profile-link svg {
    width: 20px;
    height: 20px;
    fill: var(--text-color);
    flex-shrink: 0;
    transition: fill 0.3s;
}

.user-profile-link:hover svg {
    fill: #fff;
}

.user-profile-link span {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.nav-bottom {
    margin-top: 30px;
    padding-bottom: 20px;
}

.logout-btn {
    width: 100%;
    padding: 12px 16px;
    font-size: 0.9rem;
    background-color: #666;
    border-radius: 8px;
}

.logout-btn:hover {
    background-color: #888;
    transform: none;
    color: #fff;
}

.login-prompt {
    text-align: center;
    padding: 60px 20px;
}

.login-link {
    display: inline-block;
    padding: 12px 24px;
    background-color: var(--button-color);
    color: #fff;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 500;
    margin-top: 20px;
    transition: background-color 0.3s, transform 0.2s;
}

.login-link:hover {
    background-color: var(--button-hover-color);
    transform: translateY(-2px);
}

@media (max-width: 768px) {
    .sidebar {
        width: 180px;
    }
    
    .main-content {
        margin-left: 180px;
        padding: 20px;
    }
    
    .project-title {
        font-size: 2rem;
    }
}

@media (max-width: 600px) {
    .container {
        flex-direction: column;
    }
    
    .sidebar {
        width: 100%;
        height: auto;
        position: relative;
        padding: 20px;
    }
    
    .nav-menu {
        flex-direction: row;
        flex-wrap: wrap;
    }
    
    .main-content {
        margin-left: 0;
        padding: 20px;
    }
    
    .project-title {
        font-size: 1.8rem;
    }
}